GE DigitalFlow GF868 Programming Manual

GE

Measurement & Control Gas Analysis

DigitalFlow™ GF868

Ultrasonic Flowmeter for Flare Gas

Programming Manual (2-Channel)

910-194P2 Rev. F

February 2015

DigitalFlow™ GF868

Ultrasonic Flowmeter for Flare Gas

Programming Manual (2-Channel)

910-194P2 Rev. F
February 2015

www.ge-mcs.com

©2015 General Electric Company. All rights reserved.

Technical content subject to change without notice.

[no content intended for this page]

ii

Preface

Information Paragraphs

Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not

essential to the proper completion of the instructions.

IMPORTANT: These paragraphs provide information emphasizing instructions which are essential to proper setup of

the equipment. Failure to follow these instructions carefully may cause unreliable performance.

WARNING! Indicates a potentially hazardous situation which can result in serious personal
injury or death, if it is not avoided.

CAUTION! Indicates a potentially hazardous situation which can result in minor or moderate
injury to personnel or damage to the equipment, if it is not avoided.

HIGH VOLTAGE! This symbol indicates the presence of high voltage. It calls your attention to
situations or operations that could be dangerous to you and other persons operating the
equipment. Read these messages and follow the instructions carefully.

Safety Issues

WARNING! It is the responsibility of the user to make sure all local, county, state and national

codes, regulations, rules and laws related to safety and safe operating conditions are met for
each installation.

Auxiliary Equipment

Local Safety Standards

The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.

Working Area

WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As
equipment can move suddenly and without warning, do not enter the work cell of this equipment
during automatic operation, and do not enter the work envelope of this equipment during
manual operation. If you do, serious injury can result.

WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out
before you perform maintenance procedures on the equipment.

DigitalFlow™ GF868 Programming Manual (2-Channel) iii

Preface

Qualification of Personnel

Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.

Personal Safety Equipment

Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear, safety shoes, etc.

Unauthorized Operation

Make sure that unauthorized personnel cannot gain access to the operation of the equipment.

Environmental Compliance

Waste Electrical and Electronic Equipment (WEEE) Directive

GE Measurement & Control is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE)
take-back initiative, directive 2012/19/EU.

The equipment that you bought has required the extraction and use of natural resources for its production. It may
contain hazardous substances that could impact health and the environment.

In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle most of the
materials of your end life equipment in a sound way.

The crossed-out wheeled bin symbol invites you to use those systems.

If you need more information on the collection, reuse and recycling systems, please contact your local or regional
waste administration.

http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/weee.html for take-back instructions and

Visit
more information about this initiative.

iv DigitalFlow™ GF868 Programming Manual (2-Channel)

Contents

Chapter 1. Programming Site Data

1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Using the Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.3 Obtaining On-line Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.4 Using the Console Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.4.1 Audio Alarm Volume. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.4.2 Stopwatch Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.4.3 Display Brightness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.4.4 Display Contrast. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.5 The User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.5.1 Entering Programming Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.6 Entering Channel Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.6.1 Activating a Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.6.2 Entering System Data for a Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.6.3 Entering Pipe Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.6.4 Setting Up Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.6.5 Entering Setup Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.7 Entering Global Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1.7.1 Setting the Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1.7.2 Entering Global System Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1.7.3 Setting Up Global Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1.7.4 Setting Up Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1.7.5 MODBUS Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

1.7.6 Activating Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1.8 Saving Site Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

1.9 Recalling Site Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 2. Displaying Data

2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

2.2 The BIG Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.3 The DUAL Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.4 The GRAPH Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.4.1 Setting Up the GRAPH Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.4.2 Using the GRAPH Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.5 The LOG Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.5.1 Entering the LOG Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.5.2 Numeric Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.5.3 Graphical Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.6 Displaying the Transducer Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

2.7 Setting the LCD Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2.8 Activating Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

DigitalFlow™ GF868 Programming Manual (2-Channel) v

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Chapter 3. Logging Data

3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

3.2 Creating a Standard Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

3.2.1 Log Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

3.2.2 STARTTIME Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

3.2.3 START DATE Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

3.2.4 END TIME Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

3.2.5 END DATE Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

3.2.6 DURATION Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

3.2.7 LOG TIME Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

3.2.8 TIME INCREMENT Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

3.3 Checking the Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

3.4 Stopping a Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

3.5 Creating an ERROR Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

3.5.1 Log Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

3.5.2 STARTTIME Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

3.5.1 START DATE Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Chapter 4. Printing Data

4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

4.2 Print Live Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

4.2.1 Numeric Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

4.2.2 Graphical Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

4.3 Printing Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

4.3.1 Numeric Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

4.3.2 Graphical Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

4.4 Print Site File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

4.5 Stop Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

4.6 Setting Up a Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

4.7 Printing Signal Array Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

4.8 Printing RTD Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Chapter 5. Clearing Data

5.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

5.2 Reset Totals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

5.3 Deleting Site Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

5.4 Deleting Log Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

vi DigitalFlow™ GF868 Programming Manual (2-Channel)

Contents

Chapter 6. Serial Communications

6.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.2 Wiring the RS232 Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.3 Checking the GF868 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.4 Setting Up the Terminal Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6.4.1 Windows 3.X Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6.4.2 Windows 9X/NT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.5 The Optional RS485 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.5.1 Interface Converter Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.5.2 Point-To-Point Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.5.3 Multi-Point Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.6 Setting Up an Ethernet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.7 Setting Up a MODBUS/TCP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Appendix A. Menu Maps

Appendix B. Data Records

B.1 Option Cards Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

B.2 Initial Setup Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Appendix C. Programming with PanaView

C.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

C.2 Wiring the RS232 Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

C.3 Setting Up the Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

C.3.1 Setting up Ethernet Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

C.4 Adding the GF868 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

C.5 Editing Meter Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

C.5.1 Setting the Meter Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

C.5.2 Reading Transducer Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

C.5.3 Plotting Transducer Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

C.5.4 Saving Transducer Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

C.5.5 Clearing Totalizers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

C.5.6 Handling Site Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

C.6 Changing Meter Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Appendix D. Foundation Fieldbus Communications

D.1 Optional Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

D.2 Configuration Utility Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

D.3 Selecting the Desired Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

D.4 Selecting Units for AI Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

D.5 Resetting Instrument Totalizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

D.6 Function Block Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Appendix E. Foundation Fieldbus Tables

DigitalFlow™ GF868 Programming Manual (2-Channel) vii

Contents

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viii DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

Chapter 1. Programming Site Data

1.1 Introduction

The 2-Channel Model GF868 flowmeter cannot provide accurate flow rate measurements for either channel until the
instrument has been properly installed, the channel has been activated, and the basic system and pipe parameters have
been programmed into the meter. See the Startup Guide for detailed instructions on performing these tasks. After
completing the installation, proceed with this chapter to program the Model GF868’s advanced features.

IMPORTANT: If you are using PanaView™ software to program the GF868, refer to Appendix C.

Four submenus within the User Program provide access to the various programmable features of the Model GF868.
Step-by-step programming instructions for each submenu are presented in this chapter. Refer to the appropriate section
for a discussion of the following User Program submenus:

• CH1/CH2 - use this submenu to activate a channel and to enter the basic setup parameters for that channel.

• GLOBL - use this submenu to enter global meter parameters (i.e., clock, system, input/output, communications and

security), which apply to both channels.

• SAVE - use this submenu to store both channel and global data in the meter’s memory, as a site file.

• RECLL - use this submenu to recall and activate a stored site file.

Note: It is not required that both channels of a 2-Channel Model GF868 be installed. The second channel connector

may simply be left vacant for future expansion.

As an aid in following the programming instructions, a complete menu map of the User Program is included in
Appendix A, Menu Maps.

Note: In the menu map drawings, plain text represents prompt area messages and boxed text represents option bar

choices. Fx represents a function key to select an option bar choice.

DigitalFlow™ GF868 Programming Manual (2-Channel) 1

Chapter 1. Programming Site Data

1.2 Using the Keypad

The Model GF868 keypad contains 39 keys, which are labeled with their primary (unshifted) functions. In addition,
pressing the red [SHIFT] key will access the secondary functions assigned to most of the keys.

The complete keypad is illustrated in Figure 1 and a detailed description of both the unshifted and shifted functions for
each of the 39 keys is listed in Table 1 on page 3.

Note: Only the [SHIFT] key and the eight [Fx] keys have no shifted function.

ABCD EFG

789

HIJK LMN

HELP

CLR

OP

CAL

DISP

V

SCREEN

PROG

EXIT

Q

W

ENT

RST

PRNT

XYZ

LOG

45

123

0

6

U

Figure 1: Model GF868 Keypad

Note: Although the keypad is essentially the same, the front panel layout of meters supplied in one of the optional

enclosures is different. See Appendix C, Optional Enclosures, of the Startup Guide for a picture of the
applicable front panel.

2 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

Table 1: Model GF868 Key Functions

Key Unshifted Function Shifted Function

Software Function Keys - press to select the functions

None
displayed directly above them in the option bar. These
keys apply only to the left pane of the display screen.

Software Function Keys - press to select the functions
displayed directly above them in the option bar. These
keys apply only to the right pane of the display screen.

Shift Key - use this red key to access the shifted
function of the other keys. One press shifts the next
keystroke only, while two presses locks the keypad in
shifted mode. A third press releases the shift function.

Arrow Keys - in measurement mode, use to scroll
through function choices on the option bar. In program­ming mode, use to scroll through menu choices. The
[ also acts as a backspace key in programming
mode.

None

None

Use to enter the letters A, B, C and D,

respectively.

Program Key - press to enter the User Program. See

Use to enter the letter Q.
page 8 for details.

Display Key - use to display data in a variety of

Use to enter the letter O.
numeric and graphic formatting options. See page 39
for details.

DigitalFlow™ GF868 Programming Manual (2-Channel) 3

Chapter 1. Programming Site Data

Key Unshifted Function Shifted Function

Log Key - use to set up logs. See page 39 for details. Use to enter the letter X.

Table 1: Model GF868 Key Functions (cont.)

Print Key - use to print live measurements, log files and
signal arrays. See page 39 for details.

Clear Key - use to reset totals and to delete site and log
files from the Model GF868 memory. See page 39 for
details.

Calibration Key - use to calibrate the analog inputs and
outputs and to test the alarm relays and the totalizer/
frequency outputs. See Chapter 1, Calibration, in the
Service Manual for details.

Exit Key - use to move up one level in the user program
or to exit the user program. See this chapter for details.

Enter Key - use to confirm the most recent input infor­mation.

Help Key - use to access the Model GF868’s context­sensitive on-line help system. See the next section for
details.

Screen Key - press the left side to select the left display
pane or press the right side to select the right display
pane.

Use to enter the letter R.

Use to enter the letter H.

Use to enter the letter P.

Use to enter the letter J.

Use to enter the letter K.

Use to enter the letter I.

Press the left side to enter the letter V
or press the right side to enter the letter
W.

Decimal Point Key - press to enter a decimal point

Use to enter the letter Z.

during numeric entry.

Minus Key - use to enter a minus sign or a dash. Use to enter a space character.

Zero Key - use to enter the number 0. Use to enter the letter Y.

One Key - use to enter the number 1. Use to enter the letter S.

Two Key - use to enter the number 2. Use to enter the letter T.

Three Key - use to enter the number 3. Use to enter the letter U.

Four Key - use to enter the number 4. Use to enter the letter L.

4 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

Table 1: Model GF868 Key Functions (cont.)

Key Unshifted Function Shifted Function

Five Key - use to enter the number 5. Use to enter the letter M.

Six Key - use to enter the number 6. Use to enter the letter N.

Seven Key - use to enter the number 7. Use to enter the letter E.

Eight Key - use to enter the number 8. Use to enter the letter F.

Nine Key - use to enter the number 9. Use to enter the letter G.

Audio Level Key - press to increase the audio alarm
volume.

Stopwatch Timer Key - press to turn the stopwatch
timer on.

Backlight Key - press to turn the display backlight on
or to increase its brightness.

Contrast Key - press to increase the contrast of the dis­play screen.

Press to decrease the audio alarm

volume.

Press to turn the stopwatch timer off.

Press to turn the display backlight off

or to decrease its brightness.

Press to decrease the contrast of the

display screen.

DigitalFlow™ GF868 Programming Manual (2-Channel) 5

Chapter 1. Programming Site Data

1.3 Obtaining On-line Help

A context-sensitive, on-line help system is programmed into every Model GF868 flowmeter. On-line help, which
displays additional information related to the current task, may be accessed at any time by pressing the [HELP] key on
the keypad. The help information will be shown on the currently selected pane of the display screen, as shown in
Figure 2.

ON-LINE HELP

MORE

MORE EXIT

Figure 2: Typical On-Line Help Screen

After entering the on-line help system, the following functions are available on the option bar of the selected display
pane:

EXIT

ERROR

ERROR FLOW

FLOW

• MORE: Press [F1] (or [F5]) to access this function, and the next screen of text is displayed in the prompt area.

• EXIT: Press [F2] (or [F6]) to access this function, and the Model GF868 returns to measurement mode.

• ERROR: Press [F3] (or [F7]) to access this function, and the various Model GF868 error codes are displayed. Use the

[F1]-[F4] (or [F5]-[F8]) function keys, in conjunction with the [ and [ keys, to obtain additional information on

the desired error code or to exit the help system.

Note: See the Service Manual for a complete listing of all error codes and messages.

• FLOW: Press [F4] (or [F8]) to access this function, and the various flow measurement parameters are displayed. Use

[F1]-[F4] (or [F5]-[F8]) function keys, in conjunction with the [ and [ keys, to obtain additional information

the
on the desired measurement parameter or to exit the help system.

6 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.4 Using the Console Control Keys

The Model GF868 has four console control keys, which are located on the left side of the keypad. Use these keys,
which are described and pictured in Table 1 on page 3, in accordance with the following instructions:

1.4.1 Audio Alarm Volume

Use the top console control key to adjust the audio alarm volume.

Discrete presses will incrementally increase the volume of the audio alarm. Hold the key down for continuous increase.
Use the key in shifted mode to decrease the volume of the audio alarm.

1.4.2 Stopwatch Totalizer

Use the second console control key for the stopwatch totalizer.

Press the key once to start the stopwatch totalizer. Press the key once, in shifted mode, to stop the stopwatch totalizer.

Note: Instructions on properly setting up the stopwatch totalizer are given later in this chapter. Also, the Service

Manual provides information on the error response of the stopwatch totalizer.

1.4.3 Display Brightness

Use the third console control key to adjust the display backlight.

Discrete presses of this key will increase the backlight brightness through settings of Off, Mid and Full. Discrete
presses of this key in shifted mode, will decrease the backlight brightness through settings of Full, Mid and Off.

Note: The display backlight has an automatic time-off feature. See page 49 for setup instructions.

1.4.4 Display Contrast

Use the bottom console key to adjust the display contrast.

Discrete presses will incrementally increase the display contrast. Hold the key down for continuous increase. Use the
same key, in shifted mode, to decrease display contrast.

DigitalFlow™ GF868 Programming Manual (2-Channel) 7

Chapter 1. Programming Site Data

1.5 The User Program

Use the keypad, as described in Chapter 3, Operation, of the Startup Guide to navigate through the User Program. The
menu maps in Appendix A may be followed in sequence, or the [ and [ keys may be used to scroll through the
prompt screens. The [ key may be used to delete the last alphanumeric character that was entered from the keypad.

The following discussion assumes that the left screen pane is active. If the right screen pane is active, only the function
key designations change. That is, replace [F1]-[F4] with [F5]-[F8]. Also, Channel 1 is used in all examples, but the
instructions apply equally to Channel 2.

Note: Be sure to record all the programming data entered in this chapter in Appendix B, Data Records.

Programming of the ACTIV, SYSTM (Ch1 and GLOBL) and PIPE submenus is necessary for operation of the Model GF868.
Failure to accurately enter all of the required information will result in unreliable flow rate data. Therefore, be sure to
complete at least the sections of this chapter pertaining to those three submenus.

Note: Because it is so essential, instructions for programming the ACTIV, SYSTM and PIPE submenus are also included

in the Startup Guide. If that programming has already been completed, skip the corresponding sections of this
chapter.

Except for the three submenus noted above, it is not necessary to program the Model GF868 flowmeter in any
particular order. Therefore, the sections of this chapter need not be completed in sequence. Proceed immediately to any
section of interest.

1.5.1 Entering Programming Mode

To access the User Program, press the [PROG] key on the keypad. The standard measurement mode screen will be
replaced by the following initial programming mode screen:

PROGRAM Start 

PROGRAM
Channel 1

CH1 CH2 GLOBL SAVE

Note: If the security feature is active, enter the password and press the

SECUR submenu section of this chapter on page 35 for more information on the security feature.

Press the [ and [ keys and one of the function keys [F1]-[F4] to select the
desired submenu. From this screen, press [EXIT] to return to measurement mode.

[ENT] key to enter the User Program. See the

8 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6 Entering Channel Data

After selecting [F1]=CH1 (or [F2]=CH2) at the initial programming screen, the following screen appears:

Chan 1 PROGR Start 

Press the [ and [ keys and a function key [F1]-[F4] to select the desired
submenu. From this screen, press [EXIT] to return to the initial User Program screen
shown on page 8.

Channel PROGRAM
status

ACTIV SYSTM PIPE I/O

Based on the selection made above, proceed to the appropriate section of this chapter for instructions.

1.6.1 Activating a Channel

The ACTIV submenu activates a channel and selects the desired measurement method.

1. To enter the Channel PROGRAM menu, press [F1] or [F2] (depending on the desired channel) at the User PROGRAM

prompt.

2. Enter the ACTIV submenu by pressing [F1] at the Channel PROGRAM prompt.

3. Press [F1] (OFF) to deactivate the channel and return to the Channel PROGRAM prompt, or press [F2] to activate the

channel in BURST mode.

4. Press [F1] to select Skan mode or [F2] to select Skan/Measure mode. The meter will exit the ACTIV submenu and

return to the channel menu screen.

As indicated in the above prompt, the Model GF868 flowmeter can take measurements in two different ways:

• Skan is the preferred technique for locating the acoustic signal and for high velocity measurements. It is more

robust in a noisy environment than the Measure technique.

• Measure is the preferred technique to use for making low velocity measurements.

If Skan is selected at the next prompt, the instrument uses this technique exclusively. However, if S/M is selected, the
meter uses Skan to find the acoustic signal and then tries to use the Measure technique for a more precise measurement.

Note: To change the

Skan and Measure parameters, see the SIGNL submenu section on page 16 of this chapter.

DigitalFlow™ GF868 Programming Manual (2-Channel) 9

Chapter 1. Programming Site Data

1.6.1a Procedure Options

After completing the above steps, the meter returns to the Channel PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Pr ogram and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.

Note: See the

SAVE submenu section on page 37 of this chapter for more information on this function.

1.6.2 Entering System Data for a Channel

Refer to Figure 11 on page 87.

1. To enter the Channel PROGRAM menu, press [F1] or [F2] (depending on the desired channel) at the User PROGRAM

prompt.

2. To program the SYSTM submenu, press [F2] at the Channel PROGRAM prompt.

IMPORTANT: Do not confuse this SYSTM submenu, which is used to enter channel-specific information, with the SYSTM

submenu of the GLOBL menu, which is used to enter information applicable to both channels.

3. Enter a Channel Label of up to 9 characters. Press [ENT].

4. Enter a Channel Message of up to 21 characters. Press [ENT].

5. Use the [ and [F1]-[F4] keys to select the Volumetric Units for the data display, as shown in Table 2.

Table 2: Available Volumetric/Totalizer Units

English Metric

Actual Units

ACF = Actual Cubic Feet ACM = Actual Cubic Meters
KACF = Thousands of ACF KACM = Thousands of ACM
MMACF = Millions of ACF MMACM = Millions of ACM

Standard Units

SCF = Standard Cubic Feet SCM = Standard Cubic Meters
KSCF = Thousands of SCF KSCM = Thousands of SCM
MMSCF = Millions of SCF MMSCM = Millions of SCM

10 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6.2 Entering System Data for a Channel (cont.)

6. Use the [F1]-[F4] keys to select the Volumetric Time for the data display.

7. Use the [F1]-[F4] keys to select the Vol Decimal Digits (the number of digits to the right of the decimal point) in the

data display.

8. Use the [ and [F1]-[F4] keys to select the Totalizer Units for the data display.

9. Use the [F1]-[F4] to select the T otal Decimal Digits (the number of digits to the right of the decimal point) in the data

display.

10. Use the [F1]-[F4] keys to select the Mass Flow units for the data display, as shown in Table 3.

Table 3: Available Mass Flow Units

English Metric

LB = Pounds KG = Kilograms

KLB = Thousands of LB TONNE = Metric Tons (1000 KG)

MMLB = Millions of LB

TONS = Tons (2000 LB)

11. Use the

12. Use the [F1]-[F4] to select the MDOT Decimal Digits (the number of digits to the right of the decimal point) in the

data display.

13. Use the [F1]-[F4] to select the Mass (Totalizer) for the data display.

14. Use the [F1]-[F4] to select the Mass Decimal Digits for the data display.

[F1]-[F4] keys to select the Mass Flow Time units for the data display.

1.6.2a Procedure Options

After completing the above steps, the meter returns to the Channel PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Pr ogram and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 11

Chapter 1. Programming Site Data

1.6.3 Entering Pipe Data

To program the transducer and pipe parameters via the PIPE submenu, complete the following steps and refer to
Figure 11 on page 87.

1. To enter the Channel PROGRAM menu, press [F1] or [F2] (depending on the desired channel) at the User PROGRAM

prompt.

2. Press [F3] at the Channel PROGRAM prompt.

3. Enter the Transducer Number (normally engraved on the head of the transducer). Press [ENT]. If there is no

engraved number, complete the steps below. Otherwise, proceed to step 4.

IMPORTANT: Special transducers, which have no engraved number on the head, are rarely used. Examine the

transducer head carefully for a number.

1.6.3a Special Transducers

a. Assign a number between 91 and 99 to the Special Transducer and press [ENT]. (The meter will only accept

values from 1 to 199.)

b. Use the [ and [F1]-[F4] keys to select the Frequency of the special transducer. The meter can not transmit an

excitation voltage at the transducer’s natural frequency without this data.

c. Enter the special transducer Time Delay (Tw) value supplied by the factory. Press [ENT]. (The meter will only

accept values from 0 to 1000 sec.)

Note: T w is the time required for the transducer signal to travel through the transducer and its cable. This time delay

must be subtracted from the transit times of the upstream and downstream transducers to ensure an accurate
measurement.

1.6.3b Pipe OD

4. Enter the known Pipe OD or circumference and use the [F1]-[F4] keys to select the appropriate units. Press [ENT].

(The meter will accept values only from 1/8 to 648 in.)

Table 4: Available Pipe OD Units

English Metric

inch = pipe OD in inches mm = pipe OD in millimeters

feet = pipe OD in feet m = pipe OD in meters

in/PI = pipe circumference in inches mm/PI = pipe circumference in millimeters

ft/PI = pipe circumference in feet m/PI = pipe circumference in meters

The required pipe data may be obtained by measuring either the pipe outside diameter (OD) or circumference at the
transducer installation site. Alternatively, the information may be obtained from tabulated data for standard pipe sizes.

12 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6.3 Entering Pipe Data (cont.)

1.6.3c Pipe Wall

5. Enter the known thickness of the Pipe Wall, in the same units used for the pipe OD. Press [ENT]. (The meter will

only accept values from 0 to 4 in.)

If the pipe wall thickness is not known and cannot be conveniently measured, look up the value in a table of standard
pipe size data or use the Model GF868’s on-line Help Menu.

1.6.3d Path Length

6. Press [F1] = inch or [F2] = feet to select the units. Then, enter the Path Length (P) of the ultrasonic signal. Press

[ENT]. (The meter will only accept values from 1/8 to 900 in.)

Note: The factory has calculated both the transducer signal path length (P) and the transducer signal axial length (L),

based on the exact transducer configuration used for the application. These values are engraved on the
flowcell and/or are included in the documentation supplied with the meter.

1.6.3e Axial Length

7. Press [F1] = inch or [F2] = feet to select the units.Then, enter the Axial Length (L) of the ultrasonic signal and press

[ENT].

1.6.3f Reynolds Correction

8. Press [F1] to turn Reynolds Correction off, or [F2] to turn it on.

Note: Reynolds Correction is a number based on the Kinematic Viscosity and flow rate of the fluid. It should be

enabled for most applications.

a. When you enable the Reynolds Correction Factor, you must also enter the Kinematic Viscosity of your gas, as

listed in Sound Speeds and Pipe Size Data. Use the numeric keys to enter a value, and press [ENT].

1.6.3g Calibration Factor

9. Enter a value for the flow Calibration Factor and press [ENT]. The default value is 1.00. (The meter will only accept

values from 0.5000 to 2.0000.)

1.6.3h Procedure Options

After completing the above steps, the meter returns to the Channel PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Pr ogram and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to

the data display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 13

Chapter 1. Programming Site Data

1.6.4 Setting Up Inputs/Outputs

The following specific tasks may be performed via the I/O submenu:

• Enter a zero cutoff value to eliminate low flow reading fluctuations

• Set up any optional temperature and/or pressure inputs

Refer to the menu map in Figure 12 on page 88.

Note: Remember to record all programmed data in Appendix B, Data Records.

1. To enter the

prompt.

2. To enter the I/O submenu, press [F4] at the Channel PROGRAM prompt.

Channel PROGRAM menu, press [F1] or [F2] (depending on the desired channel) at the User PROGRAM

1.6.4a Zero Cutoff

3. Enter the desired Zero Cutoff value and press the [ENT] key. A value of 0.1 ft/s (0.03 m/s) is recommended, but

values from 0–1 ft/s (0–0.3 m/s) are acceptable.

1.6.4b Temperature Input

Note: This option appears only if you have selected Standard as the equation type in the SYSTM submenu, as shown on

page 10.

4. At the Temperature Input prompt, press [F1] to enter a constant temperature value or press [Fx] to select the option

card in Slot x that will supply the live temperature input.

Note: Each slot that contains an option card with an analog input assigned to TEMP or an RTD input will appear on

the option bar. If the process temperature is stable, a fixed value may be used, but most applications require a
live temperature input.

5. Do one of the following:

• If you selected FIXED, enter the known fixed process temperature. Press [ENT]. (The meter will accept values only

from –148° to 662°F.)

• If you selected SLOT X:

a. Press [F1] to select input A or press [F2] to select input B.The inputs were labeled during setup.

Note: The set up of input A is used as an example. Identical procedures would be used to set up input B.

b. Enter the Base Temperature (from –148° to 662°F), and press [ENT]. The ratio of this value to the actual

temperature is used to calculate the standard volumetric flow.

14 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6.4 Setting Up Inputs/Outputs (cont .)

1.6.4c Pressure Input

6. At the Pressure Input prompt, press [F1] to enter a constant pressure value or press [Fx] to select the option card in

Slot X that will supply the live pressure input.

Note: Each slot that contains an option card with an analog input assigned to PRESR will appear on the option bar. If

the process pressure is stable, a fixed value may be used, but most applications require a live pressure input.

7. Do one of the following:

• If you selected FIXED, enter the known fixed process pressure. Press [ENT]. (The meter will only accept values

from 0–5000 psia.)

• If you selected SLOT X:

a. Press
b. Enter the Base Pressure (standard) value for the process, and press the [ENT] key. (The meter will only accept

IMPORTANT: If an installed option card does not appear on the option bar for the TEMPERATURE INPUT or PRESSURE

8. At the N2 Input prompt, press [F1] to enter a constant nitrogen (N2) percentage or press [Fx] to select the option card

in Slot X that will supply the live N2 percentage.

9. Do one of the following:

[F1] to select input A or press [F2] to select input B.The inputs were labeled during setup.

values from 0–5000 psia.)

INPUT, the card may not have been initialized or it may be defective. Call the factory for assistance.

• If you selected FIXED, enter the known fixed N2 value. Press [ENT]. (The meter accepts values from 0–100%.)

• If you selected SLOT X,

a. Press [F1] to select input A or press [F2] to select input B.The inputs were labeled during setup.

1.6.4d Procedure Options

After completing the above steps, the meter returns to the Channel PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Program and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to

the data display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 15

Chapter 1. Programming Site Data

1.6.5 Entering Setup Data

The signal limits and response times for the Model GF868 are specified via the SETUP submenu. It includes three
submenus:

• SIGNL - set the parameters related to the transducer signal

• AVRG - specify the response of the meter to step changes

• INIT - initialize all parameters to default values.

• ADVAN - set up mass flow and enter a table of K factors

To enter the
Remember to record all programmed data in Appendix B, Data Records.

SETUP submenu, press [ and [F1] at the Channel PROGRAM prompt, and refer to Figure 12 on page 88.

1.6.5a Setting Signal Limits

Use this option to set the limits for the incoming signal and other parameters affecting the transducer signal. For
example, the programmed signal strength low limit may be used to determine the trigger point for an alarm. T able 5 on
page 19 summarizes the default values and limits for parameters in this menu.

CAUTION! The SIGNL default settings are suitable for most applications. Before changing

any of these parameters, consult the factory.

Only after consultation with the factory, complete the following steps to enter the signal parameters:

1. Press [

2. Press [ENT] to accept the current Signal Low Limit value or enter a new value and press [ENT]. (The meter will only

accept values from –20 to 100.)

The default value for this parameter is 20. The E1: LOW SIGNAL error message appears when the signal strength falls
below the programmed SIGNAL LOW LIMIT value.

and [F1] = SIGNL to enter the SIGNAL submenu.

Note: See the Service Manual for a discussion of error codes.

3. Press [ENT] to accept the current Cor. (Correlation) Peak Limit value or enter a new value and press [ENT].
The default value for this parameter is 100 and values from 0 to 500 are acceptable. The E4: SIGNAL QUALITY error

message appears when the signal quality falls below the programmed COR. PEAK LIMIT value.

4. Press [ENT] to accept the current Velocity Low Limit value or enter a new value and press [ENT].
The default value for this parameter is –300.0 ft/sec (–85 m/sec) and values from –500 to 500 ft/sec (–150 to 150

m/sec) are acceptable. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity is less than the
programmed VELOCITY LOW LIMIT value.

16 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6.5a Setting Signal Limits (cont.)

5. Press [ENT] to accept the current Velocity High Limit value or enter a new value and press [ENT].
The default value for this parameter is 300.0 ft/sec (85 m/sec) and values from –500 to 500 ft/sec (–150 to 150 m/sec)

are acceptable. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity exceeds the
programmed VELOCITY HIGH LIMIT value.

6. Press [ENT] to accept the current Acceleration value or enter a new value and press [ENT].
The default value for this parameter is 100.0 ft/sec

2

(30.48 m/sec2) and values from 0 to 250 ft/sec2 (0 to 76 m/sec2) are
acceptable. The E6: CYCLE SKIP error message appears when the calculated fluid velocity changes by more than the
programmed ACCELERATION LIMIT value from one reading to the next.

7. Press [ENT] to accept the current Amp. Discrim Low value or enter a new value and press [ENT].

IMPORTANT: Consult the factory before performing this step.

The amplitude discriminator measures the size of the transducer signal received by the Model GF868. The default
value for this parameter is 14 and values from 0 to 100 are acceptable. The E5: AMPLITUDE error message appears when
the amplitude discriminator falls below the programmed AMP. DISCRIM LOW value.

8. Press [ENT] to accept the current Amp. Discrim High value or enter a new value and press [ENT].
The amplitude discriminator measures the size of the transducer signal received by the Model GF868. The default

value for this parameter is 34 and values from 0 to 100 are acceptable. The E5: AMPLITUDE error message appears when
the amplitude discriminator exceeds the programmed AMP. DISCRIM HIGH value.

9. Press [ENT] to accept the current Delta T Offset value or enter a new value and press [ENT].

IMPORTANT: Consult the factory before performing this step.

An offset between the upstream and downstream transit times is specified at this prompt. The default value for this
parameter is 0 sec and values from –1000 to 1000 sec are acceptable.

10. Press [ENT] to accept the current Skan T Offset value or enter a new value and press [ENT].
At the above prompt, specify a time measurement offset that compensates for any shift resulting from cross-correlation.

The default value for this parameter is 58 sec and values from –500 to 500 sec are acceptable.

Note: If you enter a value of 0 for this command, you enable a special mode of operation, ACTIVE SKAN T-OFFSET,

that dynamically calculates the offset.

DigitalFlow™ GF868 Programming Manual (2-Channel) 17

Chapter 1. Programming Site Data

1.6.5 Entering Setup Data (cont.)

1.6.5a Setting Signal Limits (cont.)

11. Press [ENT] to accept the current % of Peak value or enter a new value and press [ENT].
The percentage of peak used to calculate the transit times and Delta T is specified at this prompt. The default value for

this parameter is 50% and values from 1 to 100% are acceptable.

12. Use the [ and [F1]-[F4] keys to select one of the preset values for the XMIT Sample Size from the option bar.
Both the upstream and downstream transducers transmit ultrasonic pulses in bursts, which consist of a series of

transmit pulses. XMIT SAMPLE SIZE determines how many bursts are sent in one direction before sending in the other
direction. The default value for this parameter is 8 and values of 2, 4, 8, 16 and 32 are acceptable.

13. Press [ENT] to accept the current M>S_Switch value or enter a new value and press [ENT].
If the burst mode is set to Skan/Measure (S/M), the meter switches from Skan to Measure Mode when Delta T is less

than the M>S_Switch value. DO NOT change this value unless advised to do so by the factory . The default value for this
parameter is 50 sec and values from 0 to 250 sec are acceptable.

14. Press [ENT] to accept the current # shifts value or enter a new value and press [ENT].
The number of shifts corresponds to the actual number of transmits per cycle (number of signals added together in one

direction to produce an averaged signal for one interrogation of the fluid) and need only be changed if the environment
is very noisy or the acoustic signal is weak. The default value for this parameter is 3 and values from 0 to 10 are
acceptable.

15. Press [ENT] to accept the current A Divisor value or enter a new value and press [ENT].

A Divisor is used in the calculation of the Measure Mode integrated threshold level and is not normally changed. The

default value for this parameter is 2.5 and values from 0.1 to 10 are acceptable.

16. Press [ENT] to accept the current # Transmit Pulses value or enter a new value and press [ENT].

# Transmit Pulses specifies the number of pulses in a burst. The default value for this parameter is 4 and values from 1

to 16 are acceptable. For difficult conditions (i.e., long paths, high velocity or high temperature), settings as high as 16
may be necessary.

17. Press [ENT] to accept the current T Window (Cycles) value or enter a new value and press [ENT].
Normally, the Model GF868 calculates the size of the transmit window based on pipe size and fluid sound speed.

However, for special diagnostic purposes, it may sometimes be necessary to reset the window size. The default value
for this parameter is 0 and values from 0 to 1000 are acceptable.

18 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.6.5a Setting Signal Limits (cont.)

18. Press [ENT] to accept the current R Window (Cycles) value or enter a new value and press [ENT].
Normally, the Model GF868 calculates the size of the receive window based on pipe size and fluid sound speed.

However, for special diagnostic purposes, it may sometimes be necessary to reset the window size. The default value
for this parameter is 10 and values from 10 to 300 are acceptable.

Note: If the T WINDOW prompt is set to 0, the R WINDOW prompt does not appear, and the GF868 uses a R

WINDOW Width based on the expected arrival of the signal.

After completing these steps, the program returns to the SETUP window.

Table 5: Default Values and Limits for SETUP Parameters

Parameter Default Value Low Limit High Limit

Signal Low Limit 20 -20 100

Cor. Peak Limit 100 0 500

Velocity Low Limit -300.0 ft/sec (-85 m/sec) -500 ft/sec (-150 m/sec) +500 ft/sec (+150 m/sec)

Velocity High Limit 300.0 ft/sec (85 m/sec) -500 ft/sec (-150 m/sec) +500 ft/sec (+150 m/sec)

Acceleration Limit

100.0 ft/sec

2

(30.48 m/sec2)

0

250 ft/sec

2

(76 m/sec2)

Amp. Discrim Low 14 0 100

Amp. Discrim High 34 0 100

Delta T Offset 0 -1,000 μsec 1,000 μsec

Skan T Offset 58 μsec -500 μsec 500 μsec

% of Peak 50% 1% 100%

XMIT Sample Size 8 2 32

M>S Switch 50 μsec 0 μsec 250 μsec

# shifts 3 0 10

A Divisor 2.5 0.1 10

# Transmit Pulses 4 1 16

T Window 0 0 1,000

R Window 10 10 300

DigitalFlow™ GF868 Programming Manual (2-Channel) 19

Chapter 1. Programming Site Data

1.6.5 Entering Setup Data (cont.)

1.6.5b Setting Response Time

Use this option to specify the number of readings that occur before the meter will respond to a step change in flow rate.
In general, the smaller the number of readings, the less steady the display will appear.

1. Press [ and [F2] = AVRG to enter the AVERAGE submenu.

2. Use the [ and [F1]-[F4] keys to select the desired option. The available response time options are 1, 2, 5, 10, 30, 60

readings and STATS. For best results, select STATS (statistics), as this increases the response time under steady flow
conditions while still allowing a rapid response to changes in flow rate.

After completing this step, the program returns to the SETUP window.

1.6.5c Initializing the System

Use this option to initialize (reset) many of the parameters within the SETUP menu to their default values. These
parameters include: Signal Low Limit, Correlation Peak Limit, Velocity Low and High Limits, Acceleration Limit,
Amplitude Discrimination Low, Amplitude Discrimination High, Delta T Offset, Skan T Offset, % of Peak and XMIT
Sample Size. They do not include: M>S_Switch, # Shifts, A Divisor, # Transmit Pulses, T WINDOW and R
WINDOW, which remain at their last programmed values.

1. Press [ and [F3] = INIT.

2. Press [F1] = NO to keep the current values or press [F2] = YES to reset all values to their default settings.

1.6.5d Setting Advanced Parameters

The ADVAN option enables you to access the more advanced features of the GF868. In this option you can perform two
functions:

• enable mass flow (calculated for static fluid density)

• enter a table of K-factors (based on velocity or Reynolds number) that compensates for non-linear flow rates (see

the next page)

To enter the ADVAN submenu, press [F4] at the SETUP window.

Entering Mass Flow

1. Press [F1] = MASS to enter the Mass Flow option.

2. At the

3. If you press YES, enter the Fluid Density of the gas to be measured and press [ENT]. (The meter will only accept

Static Density? prompt, press [F1] = NO or [F2] = YES. If you press NO, the GF868 returns to the Advanced

Features prompt.

values from 0.00001-100 lb/ft3.)

The GF868 returns to the Advanced Features prompt.

20 DigitalFlow™ GF868 Programming Manual (2-Channel)

Editing K Factors

1. Press [F2] = MULTK to enter the MultiK option.

2. Press [F1] = NO to disable or [F2] = YES to enable Multiple K-factors.

• If you press NO, the GF868 returns to the Advanced Features prompt.

• If you press YES, complete the steps below.

Chapter 1. Programming Site Data

a. The GF868 asks for the type of K factor. Press

(Custom Reynolds number).

[F1] to select CstV (Custom velocity) or [F2] to select CstR

• If you enable CstR, you must also enter the Kinematic Viscosity of your gas, as listed in Sound Speeds and Pipe

Size Data. Use the numeric keys to enter a value, and press [ENT].

b. Press

Note: If velocity vs. K-factor data was not provided with the Model GF868, the K-factor table can not be edited.

c. Enter the Number of K-factors to be entered into the table. Press [ENT]. (The meter will only accept values from

IMPORTANT: When editing the K-factor table, the velocities must be entered in increasing order.

d. Enter the Velocity Value for K-factor number “x”. Press [ENT]. (The meter will only accept values from –30,000

e. Enter the K-factor corresponding to velocity number “x”. Press [ENT].

3. Repeat steps c and d until all of the data points have been entered.

1.6.5e Procedure Options

After completing the above steps, the meter returns to the ADVANCED FEATURES prompt. Continue as follows:

[F1] = NO to retain the current K-factor table and return to the Advanced Features prompt, or press [F2] =

YES to Edit The K-factor Table.

2 to 20.)

to +30,000 ft/sec.)

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Pr ogram and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 21

Chapter 1. Programming Site Data

1.7 Entering Global Data

The GLOBL menu is used to enter information that is not specific to one of the individual channels. Information
programmed via this menu is used to compute parameters such as the sum, difference or average of the channel 1 and
channel 2 signals. In addition, several general system parameters may be entered in the GLOBL menu.

IMPORTANT: When calculating the SUM, DIF or AVE readouts, data from the GLOBL-SYSTM submenu is used. Any

conflicting data entered in the CH1-SYSTM or CH2-SYSTM submenus is overridden.

The following submenus are included in the GLOBL menu:

• CLOCK - used to enter the current date and time

• SYSTM - used to specify the units of measure used in calculations

• I/O - used to set up error handling and to configure analog inputs and outputs

• COMM - used to set up the serial communications port

• SECUR - used to specify a programming access password.

After selecting

PROGRAM Start 

Global PROGRAM
previous selection appears here

CLOCK SYSTM I/O COMM

Refer to Figure 13 on page 89 and Figure 14 on page 90, and remember to record all programming data in Appendix B,
Data Records.

[F3]=GLOBL at the initial programming screen, the following screen appears:

Use the [ and [ keys and [F1]-[F4] function keys to select the desired
submenu. Complete the steps listed to program each submenu.

22 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.7.1 Setting the Clock

Use the CLOCK submenu to enter the current date and time. Refer to Figure 13 on page 89. To program the CLOCK
submenu, press [F1] at the Global PROGRAM prompt and complete the following steps:

1.7.1a Setting the Date

1. The first prompt displays the programmed Date.

• If the displayed date is correct, press [F1] = OK and proceed to step 2.

• If the displayed date is incorrect, press [F2] = EDIT to change the date, and complete the steps below.

a. Enter the current year and press
b. Use the [, [ and [F1]-[F4] keys to select the current month.
c. Enter the current day and press [ENT]. The allowable range is 1 to the number of days in the current month.

[ENT]. The allowable range is 0 to 99.

1.7.1b Setting the Time

2. The next prompt displays the programmed Time.

• If the displayed time is correct, press [F1] = OK to return to the GLOBL prompt.

• If the displayed time is incorrect, press [F2] = EDIT to change the time, and complete the steps below.

a. Press

Note: A time of 12 PM represents Noon and a time of 12 AM represents Midnight.

b. Enter the current Minutes and press [ENT]. The allowable range is 0 to 59.
c. Enter the current Seconds and press [ENT]. The allowable range is 0 to 59.

After completing the above steps, the program returns to the GLOBL window.

[F1] = AM or [F2] = PM. Then enter the current Hour and press [ENT]. The allowable range is 1 to 12.

DigitalFlow™ GF868 Programming Manual (2-Channel) 23

Chapter 1. Programming Site Data

1.7.2 Entering Global System Data

Refer to Figure 13 on page 89.To program this submenu, press [F2] at the Global PROGRAM prompt, and complete the
following steps:

1. At the System Units prompt, press

[F2] = METRC to display parameters and measurements in metric units.

[F1] = ENG to display parameters and measurements in English units or

2. Use the [F1]-[F4] keys to select the desired type of Pressure Units for display, as shown in Table 6.

Table 6: Available Pressure Units

English Metric

PSIa = Pounds per square inch absolute BARa = bar absolute

PSIg = Pounds per square inch gage BARg = bar gage

kPaa = kiloPascals absolute

kPag - kiloPascals gage

Note: The choices shown on the option bar are determined by the selections made at the previous

SYSTEM UNITS

prompt.

• If you have entered gage pressure, or the local atmospheric pressure (PSIg, BARg or kPag), the GF868 asks for a

Gage Pressure value. Enter the value, and press [ENT].

3. At the Stopwatch Totalizer prompt, press

measure totals manually with the Stopwatch Timer.

If AUTO is selected above, the meter automatically begins totalizing upon leaving the User Program. If MNUAL is
selected, the console key on the keypad may then be used to start and stop the totalizer. The manner in which the
Stopwatch Totalizer responds to an error condition may be set in the I/O submenu.

[F1] = AUTO to measure totals automatically or press [F2] = MNUAL to

IMPORTANT: After setting up the Stopwatch Totalizer , press [CLR] to clear the Stopwatch Totalizer, or the new totals will

be added to any previously accumulated totals.

Note: The manner in which the Stopwatch Totalizer responds to an error condition may be set in the

24 DigitalFlow™ GF868 Programming Manual (2-Channel)

I/O submenu.

Chapter 1. Programming Site Data

1.7.2a Entering Volumetric Data

4. Use the [F1]-[F4] and [ keys to select the desired Volumetric Units for the flow rate display. (See Figure 13 on

page 89 for all available volumetric and totalizer units.)

5. Use the [F1]-[F4] and [ keys to select the desired Volumetric Time units for the display.

6. Use the [F1]-[F4] keys to select the desired number of Vol Decimal Digits to the right of the decimal point in the

display.

7. Use the [F1]-[F4] and [ keys to select the desired Totalizer Units.

8. Use the [F1]-[F4] keys to select the desired number of Total Decimal Digits to the right of the decimal point in the

display.

1.7.2b Entering Mass Flow Data

9. Use the [F1]-[F4] and [ keys to select the desired Mass Flow units for the flow rate display. (See Figure 13 on

page 89 for all available mass flow units.)

10. Use the [F1]-[F4] keys to select the desired Mass Flow Time units for the display.

11. Use the [F1]-[F4] keys to select the desired number of MDOT Decimal Digits in the mass flow rate display.

12. Use the [F1]-[F4] keys to select the desired units for the Mass Totalizer.

13. Use the [F1]-[F4] keys to select the number of Mass Decimal Digits in the totalized mass flow display.

After completing the above steps, the program returns to the GLOBL window.

1.7.2c Procedure Options

After completing the above steps, the meter returns to the GLOBL window. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Pr ogram and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.

Note: See the

SAVE submenu section on page 37 of this chapter for more information on this function.

DigitalFlow™ GF868 Programming Manual (2-Channel) 25

Chapter 1. Programming Site Data

1.7.3 Setting Up Global Inputs/Outputs

The I/O submenu allows users to program error handling responses, as well as both built-in and optional analog outputs
and cards. To program this submenu, press [F3] at the Global PROGRAM prompt, and refer to Figure 14 on page 90.

• Press [F1] to set up error handling, or

• Press [F2] to set up any inputs or outputs.

Complete the steps below to program each submenu.

Note: Be sure to record all programmed data in Appendix B, Data Records.

1.7.3a Selecting Error Handling

This menu option permits programming of the manner in which the Model GF868’s totalizers respond during an error
condition. See Chapter 2, Error Codes and Screen Messages, of the Service Manual for a discussion of the built-in
error codes.

1. At the I/O prompt, press [F1] (Error).

2. Press [F1] if you want the GF868 to Hold the last “good” reading and continue to totalize, based on that reading, or

press [F2], No Up, if you want the meter to stop totalizing.

3. Press [F1] = NO to disable 2-path error handling, or press [F2] = YES to enable 2-path error handling.
For the AVE mode, the 2-path error handling option is intended for applications where two sets of transducers are

installed in the same location in the same pipe to improve accuracy. With this function enabled, the Model GF868
performs error handling only if both channels are in error. If this function is disabled, error handling occurs when either
channel goes into error. Specific responses of the display and the totalizer to the 2-path error handling option are listed
in Table 7.

Table 7: 2-Path Error Response Options

Option Totalizer Response

NO

YES

The User Program automatically returns to the

Outputs the average of CH1 and CH2 totals,
regardless of the error state of either channel.

1. If one channel is in error, totalizing continues.

2. If both channels are in error, totalizing stops.

Global I/O prompt.

26 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.7.3b Setting Up Option Cards

The Model GF868 has two built-in analog outputs, which are assigned to Slot 0. Also, a variety of option cards may be
installed in the six expansion slots. See Chapter 1, Installation, of the Startup Guide for a complete description of the
available option cards.

Note: For this discussion, Slot x will be used to reference any of the specific expansion slots (Slot 1 - Slot 6). If the

number of a slot with an installed option card does not appear, the card may not have been initialized or it may
be defective. Call the factory for assistance.

• Use the [ and [ and the [F1]-[F4] keys to select the desired slot number. (Only those slots which contain an

option card will appear on the option bar.)

Refer to the menu map in Figure 14 on page 90 in Appendix A, Menu Maps, and complete the following steps to setup
and/or scale the Model GF868’s analog inputs and outputs.

Slot X Analog Outputs

1. Use the

[F1]-[F2] keys to set up outputs A or B respectively.

Note: The set up of output A is used as an example. Identical procedures would be used to set up Output B.

2. Press [F1] = OFF to disable output A and return to the previous prompt, or press [F2] = 0-20 m or [F3] = 4-20 m to

specify the desired range for output A.

3. Use the [ and [ and [F1]-[F4] keys to select a Channel option for the data source.

4. Use the [ and [ and [F1]-[F4] keys to specify the desired Output Measurement parameter.

5. Enter the Zero value for the low end of the chosen output range. Press [ENT].

6. Enter the Full value for the high end of the chosen output range. Press [ENT].

7. Press [F1]-[F4] to set up another output or press [EXIT] to select another slot for set up.

DigitalFlow™ GF868 Programming Manual (2-Channel) 27

Chapter 1. Programming Site Data

1.7.3 Setting Up Global Inputs/Outputs (cont .)

Alarms

1. Use the [F1]-[F3] keys to set up alarm relays A, B, or C, respectively.

Note: The set up of alarm A is used as an example. Identical procedures would be used to set up the other alarms.

2. Press [F1] = OFF to disable Alarm A and return to the previous prompt, or press [F2] = HIGH, [F3] = LOW or [F4] =

FAULT to specify the type for Alarm A.

3. Press [F1] = NO for standard operation or [F2] = YES for Failsafe operation.

4. Use the [ and [ and [F1]-[F4] keys to select a Channel option for the data source.

5. The prompts now vary with your choice in step 2.

• If you selected FAULT, proceed to step 6.

• If you selected HIGH or LOW, complete the steps below.

a. Use the [ and [ and
b. Enter a value for the trigger point of the alarm and press [ENT].

6. Press [F1]-[F3] to set up another alarm or press [EXIT] to select another slot for set up.

[F1]-[F4] keys to specify the desired Output Measurement parameter.

1.7.3c Totalizer/Frequency Outputs

1. Press [F1]-[F4] to set up outputs A, B, C or D, respectively.

2. Press [F1] = OFF to disable output A and return to the previous prompt, or press [F2] = FREQ or [F3] = TTLZR to

designate output A as a frequency or a totalizer output, respectively.

Note: The setup of output A is used as an example. Identical procedures would be used to set up the other outputs.

3. Use the [ and [ and [F1]-[F4] keys to select a Channel option for the data source.

• To program a frequency output, go to step 4.

• To program a totalizer output, go to step 5.

Frequency Output

4. The

FREQ output, [F2], produces a frequency pulse that is proportional to the output measurement. Complete the

steps below to program the frequency output.

a. Use the [ and [ and [F1]-[F4] keys to specify the desired Output Measurement parameter.
b. Enter the Base value for the low end of the frequency output range and press [ENT].
c. Enter the Full value for the high end of the frequency output range. Press [ENT].
d. Enter a value between 1 and 10,000 for the Full Scale Frequency. Press [ENT].

28 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

Totalizer Output

5. The TTLZR output, [F3], issues one pulse per selected volume of flow. The meter produces a pulse each time the

programmed amount of flow passes through the pipe. Complete the steps below to program the totalizer output.
a. Press [F1] = +TOTL to totalize the forward flow, [F2] = -TOTL to totalize the reverse flow, [F3] = +MASS (if

available) to totalize the forward mass flow or [F4] = -MASS (if available) to totalize reverse mass flow.

b. Enter a value from 50 to 500,000 sec for the Minimum Pulse ON Time and press [ENT].

Note: A complete pulse consists of equal amounts of ON and OFF times. Choose a value that is compatible with the

frequency counter to be used.

c. Enter a value for the number of measurement Units/Pulse and press [ENT].

6. Press [F1]-[F4] to set up another totalizer/frequency output or press [EXIT] to select another slot for setup.

Analog Inputs

1. Press [F1] to set up input A or [F2] to set up input B.

Note: The set up of input A is used as an example in this manual. Identical procedures would be used to set up input

B. (An analog input option card may contain one standard analog input and one RTD analog input.)

2. Enter a Label of up to eight characters for input A and press [ENT].

3. At the Input Measurement prompt, press [F1] = OFF to disable input A and return to the previous prompt, or press

[F2] = PRESR (pressure), [F3]= TEMP (temperature) or [F4] = SPEC (special) to designate the input.

4. Do one of the following:

• If you selected PRESR or TEMP, proceed to step 5.

• If you selected SPEC, complete the steps below.

a. Enter an Input Name and press
b. Enter the Input Units of measurement and press [ENT].

5. Enter the Zero Value for the low end of the chosen input range and press [ENT].

6. Enter the Full Scale Value for the high end of the chosen input range and press [ENT].

7. Press [F1]-[F2] to set up another input or press [EXIT] to select another slot for setup.

[ENT].

DigitalFlow™ GF868 Programming Manual (2-Channel) 29

Chapter 1. Programming Site Data

1.7.3 Setting Up Global Inputs/Outputs (cont .)

Option Card RTD Inputs

Option cards with R TD inputs have a temperature range of –100° to 350°C. Complete the following steps to set up the
two RTD inputs of an option card installed in Slot x:

1. Press [F1] to set up RTD input A or [F2] to set up RTD input B.

Note: The setup of RTD input A is used as an example. Identical procedures would be used to set up RTD input B.

2. Enter a label of up to eight characters and press [ENT].

3. At the Input Measurement prompt, press [F1] = OFF to disable RTD input A and return to the previous prompt, or

press [F2] = TEMP to enable RTD input A.

4. Enter the Zero Value for the low end of the chosen input range and press [ENT].

5. Enter the Full Scale Value for the high end of the chosen input range and press [ENT].

6. Press [F1]-[F2] to set up another input or press [EXIT] to select another slot for set up.

For instructions on setting up additional inputs and/or outputs, proceed to the appropriate section. Otherwise, press

[EXIT] twice to return to the Global PROGRAM prompt.

Procedure Options

After completing the above steps, the meter returns to the Global I/O prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Program and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to
the data display.

Note: See the

SAVE submenu section on page 37 of this chapter for more information on this function.

30 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.7.4 Setting Up Communications

The Model GF868 flowmeter can transmit stored data and displayed readings to a remote ANSI terminal or a personal
computer by connecting the meter’s RS232 interface to the serial port of the PC. In addition, the Model GF868 can
receive and execute remote commands via this link. The meter can also be configured with a MODBUS option card for
MODBUS (RS485) communications, a Foundation Fieldbus option card for Foundation Fieldbus communications or
with a MODBUS/TCP option card for MODBUS communications over the Ethernet, if desired.

Note: To set Fieldbus communications parameters, see Appendix D, Foundation Fieldbus Communications.
Use the

COMM submenu to set the RS232, MODBUS, Ethernet and MODBUS/TCP communications port parameters

and to enter a network identification number. A network identification number is required to use the GE Instrument
Data Manager or PanaView software. To program the COMM submenu, press [F4] at the initial Global PROGRAM screen

and complete the following steps. Refer to the menu map in Figure 13 on page 89.

1. Use the [ and [ and

[F1]-[F4] keys to select the desired Baud Rate. The available rates are 300, 600, 1200,

2400, 4800, 9600 and 19,200 baud.

2. Use the [ and [ and [F1]-[F4] keys to select the number of UART Bits.

3. Enter a Network ID number between 1 and 254 and press [ENT]. The default number is 1.

A network ID number is only necessary for communication with the GE Instrument Data Manager™ or PanaView™
software. See the software User’s Manual for more information.

IMPORTANT: If the network ID number is changed, communication with the Instrument Data Manager or PanaView

must be re-established with the new ID number.

1.7.4a MODBUS (RS485) Parameters

If your GF868 does not include an option card for MODBUS communications, you have completed programming the
COMM submenu. However, if you have installed a MODBUS option card, the following additional prompts appear.

1. Press

2. Press [F1]-[F3] to set the MODBUS Parity as none, odd or even.

[F1]-[F4] to select the desired MODBUS Baud Rate from four selections: 2400, 4800, 9600 and 19,200.

3. Press [F1] to select one MODBUS Stop Bit, or [F2] to select two stop bits.

4. Use the numeric keys to enter a MODBUS Address (from 1 to 247) and press [ENT].

1.7.4b MODBUS/TCP Parameters

If your GF868 does not include an option card for MODBUS/TCP communications, you have completed programming
the COMM submenu. However, if you have installed a MODBUS/TCP option card, complete the following steps:

1. Press [F3] to select the appropriate MODBUS Baud Rate of 9600.

2. Press [F1]-[F3] to set the MODBUS Parity as none, odd or even.

3. Press [F1] to select one MODBUS Stop Bit, or [F2] to select two stop bits.

4. Use the numeric keys to enter a MODBUS Address (from 1 to 247) and press [ENT].

DigitalFlow™ GF868 Programming Manual (2-Channel) 31

Chapter 1. Programming Site Data

1.7.4c Procedure Options

After completing the above steps, the meter returns to the Global PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• To leave the User Program and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the

SAVE prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to

the data display.

Note: See the

SAVE submenu section on page 37 of this chapter for more information on this function.

1.7.5 MODBUS Register Map

When equipped with the optional MODBUS output card, the GF868 flow transmitter can send flow data and diagnostic
information to a flow computer (or SCADA) serially, using a Gould-type RTU protocol. In this case, only the
MODBUS function command, 3 (read multiple registers), 6 (write multiple registers) is valid. The format for the data
exchange is as follows:

• The send command (initiated by the host flow computer or controller) comes in the form:

[time delimiter]<Addr><3><First Register MSB>
<First Register LSB><Register Count MSB>
<Register Count LSB><CRC Low><CRC High>[time delimiter]

• The response (initiated by the host flow computer or controller) comes in the form:

[time delimiter]<Addr><3><Byte count><Data.........>

<CRC Low><CRC High>[time delimiter]

The format for the returned data types is as follows:

• Integer (16 bit Integer) <MSB><LSB>

1 Register - 16 bit integer

• Integer (32 bit IntegerI) <MSB><LSB><LSB><LSB>

2 Register - 32 bit integer

• Floating Point (FP) <EXP><MAN><MAN><MAN>

2 Registers - 32 bit IEEE floating point number

To request specific parameters from the GF868 via the MODBUS, the control system must enter the appropriate
register number. Only registers 1 through 90 are available for MODBUS communications, while registers 508 through
512 are used by the GF868 to store the MODBUS parameters. For details, see Table 8 on page 33.

32 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

Table 8: MODBUS Registers for a 2-Channel GF868

MODBUS

Reg #

10

22

DPR

Hex Addr Description

1”

Clear Ch1 Totalizers”

1“

Clear Ch2 Totalizers”

Scaling

(decimal places) Size in Bytes

-- 2 (16 bit signed)

-- 2 (16 bit signed)

3 4 Ch1 Velocity 2 4 (2 16-bit int)
5 8 Ch1 Act Volumetric #Q DIGITS 4 (IEEE 32 bit)
7 C Ch1 Std Volumetric #Q DIGITS 4 (IEEE 32 bit)

9 10 Ch1 Fwd Totals #T DIGITS 4 (2 16 bit int)
11 14 Ch1 Rev Totals #T DIGITS 4 (2 16 bit int)
13 18 Ch1 #Tot Digits 0 2
14 1A Ch1 Mass Flow #M DIGITS 4 (IEEE 32 bit)
16 1E Ch1 Fwd Mass Totals #MT DIGITS 4 (2 16-bit int)
18 22 Ch1 Rev Mass Totals #MT DIGITS 4 (2 16-bit int)
20 26 Ch1 #Mass Tot Digits 0 2
21 28 Ch1 Timer 2 4 (2 16-bit int)
23 2C Ch1 Error Code 0 2
24 2E Ch1 Sound Speed 3 4 (2 16-bit int)
26 32 Ch1 Molecular Weight 4 4 (2 16-bit int)
28 36 Ch1 Sig Strength Upstream 1 4 (2 16-bit int)
30 3A Ch1 Sig Strength Downstream 1 4 (2 16-bit int)
32 3E Ch1 Temperature 2 4 (2 16-bit int)
34 42 Ch1 Pressure 3 4 (2 16-bit int)
36 46 Ch2 Velocity 2 4 (2 16-bit int)
38 4A Ch2 Act Volumetric #Q DIGITS 4 (IEEE 32 bit)
40 4E Ch2 Std Volumetric #Q DIGITS 4 (IEEE 32 bit)
42 52 Ch2 Fwd Totals #T DIGITS 4 (2 16 bit int)
44 56 Ch2 Rev Totals #T DIGITS 4 (2 16 bit int)
46 5A Ch2 #Tot Digits 0 2
47 5C Ch2 Mass Flow #M DIGITS 4 (IEEE 32 bit)
49 60 Ch2 Fwd Mass Totals #MT DIGITS 4 (2 16-bit int)
51 64 Ch2 Rev Mass Totals #MT DIGITS 4 (2 16-bit int)
53 68 Ch2 #Mass Tot Digits 0 2
54 6A Ch2 Timer 2 4 (2 16-bit int)
56 6E Ch2 Error Code 0 2
57 70 Ch2 Sound Speed 3 4 (2 16-bit int)
59 74 Ch2 Molecular Weight 4 4 (2 16-bit int)

DigitalFlow™ GF868 Programming Manual (2-Channel) 33

Chapter 1. Programming Site Data

MODBUS

Reg #

DPR

Hex Addr Description

61 78 Ch2 Sig Strength Upstream 1 4 (2 16-bit int)
63 7C Ch2 Sig Strength Downstream 1 4 (2 16-bit int)
65 80 Ch2 Temperature 2 4 (2 16-bit int)
67 84 Ch2 Pressure 3 4 (2 16-bit int)
69 88 Avg Velocity 2 4 (2 16-bit int)
71 8C Avg Act Volumetric #Q DIGITS 4 (IEEE 32 bit)
73 90 Avg Std Volumetric #Q DIGITS 4 (IEEE 32 bit)
75 94 Avg Fwd Totals #T DIGITS 4 (2 16 bit int)
77 98 Avg Rev Totals #T DIGITS 4 (2 16 bit int)
79 9C Avg #Tot Digits 0 2
80 9E Avg Mass Flow #M DIGITS 4 (IEEE 32 bit)
82 A2 Avg Fwd Mass Totals #MT DIGITS 4 (2 16-bit int)
84 A6 Avg Rev Mass Totals #MT DIGITS 4 (2 16-bit int)

Table 8: MODBUS Registers for a 2-Channel GF868 (cont.)

Scaling

(decimal places) Size in Bytes

86 AA Avg #Mass Tot Digits 0 2
87 AC Avg Timer 2 4 (2 16-bit int)
89 B0

5

Avg Error Code

02

90 B2 Avg Sound Speed 3 4 (2 16-bit int)

508 3F6

509 3F8

510 3FA

2

MODBUS baud rate

3

MODBUS parity

4

MODBUS stop bits

02

02

02

511 3FC MODBUS meter addr 0 2
512 3FE RESERVED --- ---

34 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.7.5 Modbus Register Map (cont .)

Notes:

1. Clear T otalizers: flag from the 8051 to clear either the Channel 1 or Channel 2 totalizers.

2. MODBUS baud rate: 5 = 2400, 6 = 4800, 7 = 9600, 8=19200

3. MODBUS parity: 0 = none, 1 = odd, 2 = even

4. MODBUS stop bits: 1 = 1 stop bit, 2 = 2 stop bits

5. AVG Error Code: 0=Both Ch1 and Ch2 are in error.

1=Ch1 only is in error
2=Ch2 only is in error
3=Both channels are error free

6. You must scale measurements in the host system. For example, velocity scaling is two decimal places; thus, if the

MODBUS card reports that the velocity is 100, the host system must interpret the number as 1.00 (two decimal
places)

1.7.6 Activating Security

In order to prevent unauthorized tampering with the flowmeter’s programming, the Model GF868 is equipped with a
security feature that locks out the following menus:

• Program Menu [PROG]

• Calibration Menu [CAL]

• Log Menu [LOG]

• Clear Menu [CLR]

When the system is locked, access to the above menus will be denied unless the correct password is entered. The Model
GF868 is shipped with a default password, which is given later in this section. For increased security, the default
password should be changed.

IMPORTANT: Once the system has been locked, it can only be unlocked by entering the password, because access to the

SECUR submenu is restricted.

To program the

IMPORTANT: It is recommended that all program parameters be recorded before changing the password. (This

SECUR submenu, press [ and [F1] at the Global PROGRAM prompt. Refer to Figure 13 on page 89.

information should be recorded in Appendix B, Data Records, as a matter of routine.) If the password is
lost, the site data is not retrievable and will have to be re-entered.

DigitalFlow™ GF868 Programming Manual (2-Channel) 35

Chapter 1. Programming Site Data

1.7.6 Activating Security (cont.)

1. At the Lock Out prompt, press [F1] = UNlck to unlock the system and return to the Global PROGRAM prompt, or press

[F2] = LOCK to lock the system.

Note: If the system was unlocked at the above prompt, the following three prompts do not appear.

2. Enter the current Password (2719 is the default password) and press [ENT].

3. At the ?Edit Passwor d prompt, press [F1] = NO to leave the password unchanged and return to the Global PROGRAM

prompt, or press [F2] = YES to enter a new password.

IMPORTANT: Since the default password is printed in this manual, a new passwor d should be enter ed. If the password is

ever lost, contact the factory for assistance.

4. Enter the New Password and press [ENT]. Any combination of letters and numbers up to a total of 21 characters may

be used as a password.

Note: Keep in mind that the password may have to be entered frequently from the keypad. A long and/or complex

password may soon become annoying to use.

5. Verify the New Password by entering it again and press [ENT]. Be sure to record the new password in a safe place.

1.7.6a Procedure Options

After completing the above steps, the meter returns to the Global PROGRAM prompt. Continue as follows:

• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.

Then, proceed to the appropriate section of this manual for instructions.

• T o leave the User Program and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the SAVE

prompt. Any programming changes will be discarded and you will be returned to the data display.

• To leave the User Program and return to measurement mode, press [EXIT] twice and then press [F2] = YES at the

SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be returned to

the data display.

Note: See the SAVE submenu section on the following page for more information on this function.

36 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 1. Programming Site Data

1.8 Saving Site Files

The currently programmed site data may be stored in the Model GF868’s non-volatile memory by saving it as a site
file. Up to ten site file names, consisting of up to five characters each, may be stored at any given time. To enter the

SAVE menu, press [F4] at the initial User Program screen. Refer to Figure 13 on page 89.

1. Enter a new site file name and press [ENT], or use the [, [ and [F1]-[F4] keys to select and overwrite an existing

site file.

Note: The option bar will show only as many choices as there are existing site files.

If ten site files are already stored in memory, an existing site file must be deleted before a new site file name can be
assigned. See Chapter 5, Clearing Data, for details.

When a site file is stored in memory , it becomes the active site file until another site file is created or retrieved. (See the
next section for instructions on retrieving a site file.) To verify that the site file has been saved, use the [ key to scroll
back to the SITE NAME prompt and see if the name appears on the option bar (use the [ and [ keys to scroll through
the list, if necessary). Whenever a new site file name is saved, it is automatically assigned to the next available function
key.

IMPORTANT: The CLOCK and I/O data is not saved with the site file, while the SYSTM and COMM data is saved with the

site file.

2. Use the [ and [ and [F1]-[F4] keys to select another menu, or press [EXIT] to leave the User Program and return

to measurement mode.

DigitalFlow™ GF868 Programming Manual (2-Channel) 37

Chapter 1. Programming Site Data

1.9 Recalling Site Files

Any site file currently stored in the Model GF868’s non-volatile memory may be recalled at any time. Up to ten site file
names, consisting of up to five characters each, may be stored at any given time. To enter the RECLL menu, press [
and [F1] at the initial User Program screen.

1. Use the [ [ and [F1]-[F4] keys to select and recall an existing site file.

Note: The option bar shows only as many choices as there are existing site files. The files are listed in chronological

order by creation date.

Upon recall, the selected site file becomes active and all of its programmed parameters become current.

IMPORTANT: The CLOCK and I/O data is not recalled with the site file, while the SYSTM and COMM data is recalled with

the site file.

Note: If you have loaded a site file into a GF868, but the option cards are not in the same slots or programmed the

same way as when the site file was first saved, the GF868 displays a warning to review slot information. This
display does not mean that the option cards have lost their program information!

2. Use the [ and [ and [F1]-[F4] keys to select another menu, or press [EXIT] to leave the User Program and return

to measurement mode.

38 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 2. Displaying Data

Chapter 2. Displaying Data

2.1 Introduction

This chapter explains how to display measurement data in various formats. Each of the two display screen panes may
be programmed independently.

Note: The instructions in this chapter assume that the left display pane is active. If the right display pane is active,

simply change all [F1]-[F4] designations to [F5]-[F8].

The following submenus are included in the Display Menu:

• BIG - displays a single measurement in large size text

• DUAL - permits the simultaneous display of two measurements, in the same screen pane, in standard size text

• GRAPH - displays a graph of either velocity or volumetric flow versus time

• LOG - displays the data stored in a log file either graphically or numerically

• SIGNL - graphically displays any one of five transducer signals versus time

• BACKL - sets the time that the LCD display backlight remains on before it is automatically turned off.

• SLEEP - blanks out the display screen until a key is pressed.

Refer to Figure 15 on page 91, and proceed to the appropriate section to set up the Model GF868 display screen(s),
using one of the listed submenus.

DigitalFlow™ GF868 Programming Manual (2-Channel) 39

Chapter 2. Displaying Data

2.2 The BIG Submenu

The BIG format, which is the Model GF868’s default power up format, displays one measurement in large print. To
select the BIG format and the measurement to display in this format, follow the instructions in this section.

Upon power up, a standard measurement mode display (similar to the one shown below) appears. Press the appropriate
side of the [SCREEN] key to activate the desired pane of the display screen, and complete the following steps:

site label site file 

Velocity Ft/s

6.95

(error codes appear here)

VEL VOLUM +TOTL -TOTL

DISPLAY FEATURES 

DISPLAY FORMAT
previous selection appears here

BIG DUAL GRAPH LOG

site label site file 

Velocity Ft/s

6.95

(error codes appear here)

VEL VOLUM +TOTL -TOTL

The default power up screen is already in BIG mode. If a different display mode is
active, access the Display Menu by pressing the [DISP] key.

Press [F1] to select the BIG option. The measurement mode screen reappears with
the display in the BIG format.

Use the [F1]-[F4], [ and [ keys to select the desired display parameter option.
See Table 9 for a complete description of the available options.

Table 9: Measurement Parameter Options

Option Bar Choice Description Option Bar Choice Description

[F1] = VEL Flow Velocity [ + [F1] = TIME Total Flow Measurement Time

[F2] = VOLUM Volumetric Flow [ + [F2] = MDOT Mass Flow

[F3] = +TOTL Forward Totalized Volume Flow [ + [F3] = +MASS Forward Totalized Mass Flow

[F4] = -TOTL Reverse Totalized Volume Flow [ + [F4] = -MASS Reverse Totalized Mass Flow

+ [ + [F1] = DIAG Diagnostic

[

Note: See Chapter 3, Operation, of the Startup Guide for more details on selecting a measurement parameter to

display.

40 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 2. Displaying Data

2.3 The DUAL Submenu

The DUAL format displays two measurements simultaneously in normal print. To select the DUAL format and the
measurements to display in this format, follow the instructions in this section.

Upon power up, a standard measurement mode display (similar to the one shown below) appears in BIG format. Press
the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the following
steps:

1. To access the Display Menu, press the [DISP] key.

2. Press [F2] = DUAL. The measurement mode display reappears and the display is now in the DUAL format.

3. Use the [F1]-[F4], [ and [ keys to select the desired display parameter option. See Table 9 on page 40 for a

complete description of the available options.

Note: See Chapter 3, Operation, of the Startup Guide for more details on selecting a measurement parameter to

display.

With the DUAL format display screen active, when a measurement parameter is selected, the top line of the prompt area
will be changed to show that parameter. The parameter previously displayed at the top of the display is moved to the
bottom of the display, and the previous bottom parameter is no longer shown.

2.4 The GRAPH Submenu

The GRAPH submenu permits the display of either the flow velocity, mass flow or the volumetric flow on an XY bar
graph, with a specified time interval on the x-axis. This section describes the procedures for setting up and using the
graph format.

2.4.1 Setting Up the GRAPH Format

Press the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the
following steps:

1. To access the Display Menu, press the [DISP] key.

2. Press [F3] = GRAPH.

3. Press [F1]-[F3] to graph the Flow Velocity, Volumetric Flow or Mass Flow, respectively.

4. Use the [, [ and [F1]-[F4] keys to select the desired Time Increment.

5. Enter a maximum value for the Y-axis (vertical) scale that is larger than the maximum expected reading and press

[ENT].

6. At the Y Range prompt, press [F1] to graph only positive Y values or press [F2] to graph both positive and negative

Y values.

After the Y RANGE is entered, the Model GF868 automatically begins taking measurements and displays them in the
specified graphical format. Proceed to the next section for a discussion of manipulating the graphical display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 41

Chapter 2. Displaying Data

2.4.2 Using the GRAPH Format

While viewing data in the GRAPH format, the function keys are programmed to permit a variety of actions. These
options are described in detail below.

1.23 Ft/s 10:16

V
E
L

ST: 08 MAR 09:50

<CURS CURS> START END

At any given time, 120 data points will be shown on the



Use the [ [ and [F1]-[F4] keys to select the desired option. See Table 10 for a
listing of the available choices.

GRAPH screen. The cursor, which is displayed as a vertical line

that extends the full height of the graph window, can be used to select any one of these data points.
The typical screen shown above is for a Velocity vs. Time graph with only the positive y-axis displayed. The

measurement parameter

(VEL) is shown to the left of the y-axis and there is a message line below the graph that initially

indicates the starting date and time of the graphed data. Notice that most of the locator bar has been replaced by a status
line in standard video that shows the value, units and time of the measurement at the current cursor location. However,
there is an inverse video pointer at the far right of this line to indicate that additional option bar choices are available.

Note: The date in the message line includes only the day and the month (not the year), and the times in the status line

and the message line include only the hours and minutes (not the seconds).

Because the times displayed in the

GRAPH format are in whole minutes only, movement of the cursor may not result in

a visible change in the posted times. For example, if a TIME INCREMENT of 30 seconds has been programmed, two
presses of either cursor movement key will be required to change the displayed time by one minute.

Table 10: Graph Display Options

Option Bar Choice Description

[F1] = <CURS

[F2] = CURS>

[F3] = START

[F4] = END

+ [F1] = YMAX Displays the programmed maximum Y value in the message line: (i.e. YMAX 25.0 Ft/s)

[

+ [F2] = T INC Displays the programmed time increment value in the message line: (i.e. T INC 30 seconds)

[

+ [F3] = EXIT

[

Moves the cursor to the left and displays the corresponding measurement value and time in
the status line: (i.e.

6.85 Ft/s 10:38)

Moves the cursor to the right and displays the corresponding measurement value and time in
the status line: (i.e.

5.31 Ft/s 10:38)

Moves the cursor all the way to the left side of the graph and posts the starting date and time
in the message line: (i.e.

ST: 08 MAR 10:38)

Moves the cursor all the way to the right side of the graph and posts the ending date and time
in the message line: (i.e.

END 08 MAR 11:14)

Leaves the GRAPH format and returns the display to the previous data format. (The [EXIT] key
on the keypad will also perform this function.)

42 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 2. Displaying Data

2.5 The LOG Submenu

The LOG submenu permits the display of the data in a log file either graphically or numerically. Although the Model
GF868 can display all of the data in a log file, screen size limitations prevent the simultaneous display of the complete
log file. Therefore, the function keys must be used to view the remaining data. Follow the instructions in this section to
display a log file in the desired format.

2.5.1 Entering the LOG Submenu

Press the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the
following steps:

1. To access the Display Menu, press the [DISP] key.

2. Press [F4] = LOG.

3. Use the [ [ and [F1]-[F4] keys to select the desired log file to display. At the NAME prompt, the option bar will

show the names of all log files that are currently stored in memory. If there are no log files currently stored in
memory, the following prompt will appear instead:

DISPLAY FEATURES

DISPLAY FORMAT
logging

All Logs Cleared!

hit key

All Logs Cleared! prompt appears, at least one log file must be created and stored in memory before the Display

If the

There are no log files currently stored in memory. Either all of the log files have
been cleared or no log files have yet been created. Press any key to return to
measurement mode.

Log function can be accessed. See Chapter 3, Logging Data, for instructions on creating a log file. After at least one log
file is stored in memory and selected at the NAME prompt of the LOG submenu, proceed to the next step.

4. At the Format prompt, press [F1] to display the selected log in numeric format or press [F2] to display the selected

log in graphical format.

5. Do one of the following:

• If you pressed [F1], go to the next page.

• If you pressed [F2], go to page 45.

DigitalFlow™ GF868 Programming Manual (2-Channel) 43

Chapter 2. Displaying Data

2.5.2 Numeric Format

The Model GF868 can log up to three parameters simultaneously. Each set of data values is called a record, and up to
120 consecutive records can be stored in a page. A log file can consist of up to 120 pages. The numeric log display,
which shows one record at a time, includes the following components:

• page number

• record number

• time and date of creation

• measurement value set

• error messages (if any)

Upon choosing

NUM at the FORMAT prompt, the first record of the selected log file is displayed in a screen similar to the

following:

PAGE# 1 REC# 80

09 MAR 98

11.66 Ft/s

1.32 KACF/MI

6.91 KACF

E5: Amplitude

<CURS CURS> <PAGE PAGE>



Use the [ [ and [F1]-[F4] keys to view additional records or to exit the log
display. The options are listed in Table 11.

In the numeric display screen, the locator bar (except for the inverse video pointer at the far right) is replaced by a
standard video display of the page number and record number. The first line of the prompt area shows the time and date
that the record was created, and the next three lines list the values for the three logged parameters. Finally, any error
condition that existed at the time the record was taken is indicated by an error code in the bottom line of the prompt
area.

Table 11: Numeric Log Display Options

Option Bar Choice Description

[F1] = <CURS display the previous record on the current page
[F2] = CURS> display the next record on the current page

[F3] = <PAGE display the previous page
[F4] = PAGE> display the next page

+ [F1] = START display the first record on the current page

[

+ [F2] = END display the last record on the current age

[

+ [F3] = EXIT

[

44 DigitalFlow™ GF868 Programming Manual (2-Channel)

Leave the numeric LOG display and return to the previous data format.

[EXIT] key on the keypad will also perform this function.)

(The

Chapter 2. Displaying Data

2.5.3 Graphical Format

After choosing PLOT at the FORMAT prompt, the programming sequence continues as follows:

6. Enter a maximum value for the Y-axis (vertical) scale that is larger than the maximum expected reading. Press

[ENT].

7. At the Y Range prompt, press [F1] to graph only positive Y values or press [F2] to graph both positive and negative

Y values.

After the Y RANGE is entered, the Model GF868 automatically displays the chosen log file records in the specified
graphical format.

1.23 Ft/s 10:16

V
E
L

ST: 08 MAR 09:50

<CURS CURS> START END



Use the [ [ and [F1]-[F4] keys to select the desired option. The options are
listed in Table 12.

At any given time, the 120 records stored in one page of the log file will be graphed on the display screen. The cursor,
which is shown as a vertical line that extends the full height of the graph window, can be used to highlight any one of
these records.

IMPORTANT: Only the first of the three logged parameters is displayed in the graphical format of the LOG submenu.

Therefor e, when creating a log file, be sure to specify the parameter to be graphed at the 1st Value Logged
prompt. See Chapter 3, Logging Data, for details on creating a log file.

Table 12: Graphical Log Display Options

Option Bar

Choice Description

[F1] = <CURS

[F2] = CURS>

Move the cursor one record to the left and display the value and time of that record in the status
line: (i.e.

6.85 Ft/s 10:38)

Move the cursor one record to the right and display the value and time of that record in the status
line: (i.e.

5.31 Ft/s 10:38)
[F3] = <PAGE Display the previous page of records
[F4] = PAGE> Display the next page of records

+ [F1] = START

[

+ [F2] = END

[

+ [F3] = YMAX Display the programmed maximum Y value in the message line: (i.e. YMAX 25.0 Ft/s)

[

+ [F4] = T INC

[

[ + [F1] = EXIT

DigitalFlow™ GF868 Programming Manual (2-Channel) 45

Move the cursor to the first record on the current page and post the date and time of that record in
the message line: (i.e.

ST: 08 MAR 10:38)

Move the cursor to the last record on the current page and post the date and time of that record in
the message line: (i.e.

END 08 MAR 11:14)

Display the time increment value, as set when the log file was created, in the message line:

T INC 30 seconds)

(i.e.
Leave the graphical LOG display and return the display to the previous data format.

[EXIT] key on the keypad will also perform this function.)

(The

Chapter 2. Displaying Data

2.5.3 Graphical Format (cont.)

In the typical graphical display shown, the first logged parameter (VEL) is shown to the left of the y-axis and there is a
message line below the graph that initially indicates the starting date and time of the current page. Notice that most of
the locator bar has been replaced by a status line in standard video that shows the value, units and time of the record at
the current cursor location. However, there is still an inverse video pointer at the far right of this line to indicate that
additional option bar choices are available.

Note: The date in the message line includes only the day and the month (not the year). The times in the status line and

the message line include only hours and minutes (not seconds).

Because the times displayed in the

LOG graph are in whole minutes only, movement of the cursor may not result in a

visible change in the posted times. For example, if a TIME INCREMENT of 30 seconds has been programmed, two presses
of either cursor movement key will be required to change the displayed time by one minute.

2.6 Displaying the Transducer Signal

The SIGNL submenu permits the direct graphical display of several transducer signals. Specifically, the signals listed in
Table 13 may be viewed in this format.

Table 13: Available Transducer Signals

Transducer Signal Description

Skan Types

Sup upstream Skan signal

Sdown downstream Skan signal

Cup upstream Skan correlation

Cdown downstream Skan correlation

Measure Types

Mup upstream Measure signal

Mdown downstream Measure signal

Note: The Measure type signals (Mup and Mdown) are available only if the

ACTIV menu.

S/M burst technique was selected in the

Refer to Figure 15 on page 91 and complete the following steps to display the transducer signals. Press the appropriate
side of the [SCREEN] key to activate the desired pane of the display screen, then proceed as follows:

Note: For this discussion, it is assumed that the left pane of the display screen is active. If the right pane is active, it

is only necessary to replace the [F1]-[F4] keys designations by the [F5]-[F8] keys.

1. To access the Display Menu, press the [DISP] key.

2. Press [ and [F1] = SIGNL.

3. Press [F1] to display the Skan type signals or press [F2] to display the Measure type signals.

46 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 2. Displaying Data

2.6 Displaying the Transducer Signal (cont.)

Note: If the Skan burst technique was selected in the ACTIV menu, the Signal to Display prompt does not appear and the

Measure type signals are not available. To access these signals, the S/M burst technique must be selected.

The signal graph is a plot of signal amplitude (y-axis) vs. time in microseconds (x-axis). When the SIGNL display screen
first appears, it may briefly remain blank. As soon as the signal is acquired, processed and loaded into the display
memory, the graph will appear. A cursor, which is displayed as a vertical line that extends the full height of the graph
window, is used to highlight any point in time along the x-axis.

107 686.798mi

S
U
P

ST: 594.298usec

<CURS CURS> <PAGE PAGE>

The typical display screen shown has the



Use the [ [ and [F1]-[F4] keys to select the desired option. The options are
listed in Table 14.

Sup transducer signal listed to the left of the y-axis and there is a message line

below the graph that initially indicates the starting date and time of the graphed signal. Notice that most of the locator
bar has been replaced by a status line in standard video that shows the signal amplitude and the time (in microseconds)
of the measurement at the current cursor location. However, there is still an inverse video pointer at the far right of this
line to indicate that additional option bar choices are available.

Table 14: Graphical Log Display Options

Option Bar Choice Description

[F1] = <CURS

[F2] = CURS>

[F3] = <PAGE Display the previous page

Move the cursor to the left and display amplitude and time in the status line:

107 686.798mi)

(i.e.
Move the cursor to the right and display amplitude and time in the status line:

107 686.798mi)

(i.e.

[F4] = PAGE> Display the next page

+ [F1] = START

[

+ [F2] = END

[

+ [F3] = YMAX Display the maximum Y value, set to 128 divisions in arbitrary units, in the message line.

[

+ [F4] = T INC

[

[ + [F1] = EXIT

DigitalFlow™ GF868 Programming Manual (2-Channel) 47

Move the cursor to the start of the current page and post the starting date and time in the
message line: (i.e.

ST: 451.798usec)

Move the cursor to the end of the current page and post the ending date and time in the
message line: (i.e.

END: 744.298usec)

Display the time increment value in the message line. This is based on the frequency of the
transducers (equal to 0.125 sec for a 1 MHz transducer).

Leave the graphical SIGNL display and return the display to the previous data format.

[EXIT] key on the keypad will also perform this function.)

(The

Chapter 2. Displaying Data

2.6 Displaying the Transducer Signal (cont.)

In addition to the functions available on the option bar, some of the numeric keys are used to specify which transducer
signal is displayed and to scale the resulting graph. Table 15 lists these functions.

Table 15: Numeric Key Functions

Key Function

1

Scroll down the transducer signal list

2

Scroll up the transducer signal list

4

Expand the graph vertically

5

Return expanded graph to previous size

7

Compress graph horizontally

8

Return compressed graph to previous size

In summary, three basic functions are performed with the numeric keys:

• Signal Selection: use the “1” and “2” keys to select a transducer signal for display by scrolling through the list of

available signals.

• Vertical Scaling: The “4” and “5” keys are used to scale the graph vertically. Each press of the “4” key doubles the

height of the graph, while each press of the “5” key halves the height of the graph. The three available scale factors
are 1x, 2x and 4x.

• Horizontal Scaling: The “7” and “8” keys are used to scale the graph horizontally. Each press of the “7” key

doubles the
horizontal expansion). The four available compression ratios are 1x, 2x, 4x and 8x.

To return to the standard data screen either select EXIT from the option bar or press the [EXIT] key on the keypad.

T INC value (2x horizontal compression), while each press of the “8” key halves the T INC value (2x

48 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 2. Displaying Data

2.7 Setting the LCD Backlight

Use the BACKL submenu to specify the number of minutes the LCD display backlight remains on before it is
automatically turned off. Press the appropriate side of the [SCREEN] key to activate the desired pane of the display
screen, then proceed as follows:

Note: For this discussion, it is assumed that the left pane of the display screen is active. If the right pane is active,

replace the [F1]-[F4] keys designations by the [F5]-[F8] keys.

1. To access the Display Menu, press the [DISP] key.

2. Press [ and [F2] = BACKL.

3. Use the numeric keys to enter a value from 1 to 60 minutes and press [ENT]. To keep the backlight on constantly,

enter a value of 0 and press [ENT].

The Model GF868 will automatically return to the previous data display screen and the programmed backlight time-out
interval will begin.

If no entries are made from the keypad before the backlight time-out interval expires, the backlight will automatically
be turned off. At the next keypad entry, the backlight will be turned on and the specified time-out interval will begin
again.

2.8 Activating Sleep Mode

During times when the display is not in use, use the SLEEP submenu to temporarily suspend LCD display activity , which
allows the Model GF868 to process data more quickly. Press the appropriate side of the [SCREEN] key to activate the
desired pane of the display screen, then proceed as follows:

Note: For this discussion, it is assumed that the left pane of the display screen is active. If the right pane is active,

replace the [F1]-[F4] keys designations by the [F5]-[F8] keys.

1. To access the Display Menu, press the [DISP] key.

2. Press [ and [F3] = SLEEP. The message “LCD SLEEP MODE -Press any key. . .” appears.

3. To reactivate the display and return to the previous data screen, press any key on the keypad. The Model GF868

will automatically return to the previous data display screen.

Note: With BIG as the selected display format, exiting SLEEP mode may not erase the sleep mode message and the data

screen will be superimposed on the message. If this occurs, simply enter the DISP menu and reselect the BIG
format to refresh the screen. See the instructions earlier in this chapter.

DigitalFlow™ GF868 Programming Manual (2-Channel) 49

Chapter 2. Displaying Data

[no content intended for this page]

50 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 3. Logging Data

Chapter 3. Logging Data

3.1 Introduction

This chapter explains how to use the Model GF868’s data logging capability. The LOG menu, which is accessed by
pressing the [LOG] key on the keypad, is divided into four submenus:

• STD - used to log up to three of the available measurement data parameters

• MEM - used to check the data logger memory to determine if the specified log will exceed the available memory

• STOP - used to terminate current data logging activity

• ERROR - used to log any generated error messages.

Up to twenty standard or error log files may be created and stored in battery-backed memory . Each log file contains up
to three measurement parameters, the log start time and date, the log end time and date, the time interval between
updates, and any error messages. Error logs record data only when an error message is generated.

The Model GF868 allocates up to 120 pages of memory , each of which can contain up to 120 records, for data logging.
Each page is assigned a header, to distinguish one page from another. The header contains the log title, start date and
time, end date and time, and the time increment. Each record contains the date and time of the measurement and the
values for the three logged parameters.

Note: Each log file uses at least one page of memory, and the same page can not be shared by two different logs.

Since a fixed amount of memory is allocated for data logging, the number of active logs, the log time increments, and
the length of the log runs will all affect how much memory is available for additional logging. For example, a log that
updates every 5 seconds will use more memory than a log that updates every 6 minutes, assuming that they both run for
the same length of time.

After a log file has been created, it may be displayed, printed, cleared or uploaded to a personal computer. Refer to the
appropriate chapters of this manual for specific instructions.

Refer to Figure 17 on page 93 in Appendix A, Menu Maps, and proceed to the appropriate section for the desired
submenu. Each submenu may be followed in the sequence shown or the [ and [ keys may be used to scroll through
the prompts.

LOG

DigitalFlow™ GF868 Programming Manual (2-Channel) 51

Chapter 3. Logging Data

3.2 Creating a Standard Log

Use the STD submenu to create a new standard log and to select the parameters to log, the log start time and date, the log
end time and date, and the time increment. Also, any log file already stored in memory may be inspected and/or
changed.

Press the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the
following steps:

1. To access the Log Menu, press the [LOG] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F1] = STD.

3. Use the [, [ and [F1]-[F4] keys to inspect a completed log or to change an active log, or enter a new name (up

to 5 characters) and press [ENT] to create a new log file.

Note: At the NAME prompt, the option bar will show the names of all completed or active log files that are currently

stored in memory. Recall that a flashing asterisk (*) appears at the far right of the locator bar if the Model
GF868 is currently logging data (see Chapter 3, Operation, of the Startup Guide).

4. At the Log Message prompt, enter a brief description (up to 21 characters) of the log. Press [ENT].

5. Use the [, [ and [F1]-[F4] keys to select the first parameter to be logged. See Table 16 for a list of the available

options.

IMPORTANT: Only the first parameter logged may be graphically displayed in the LOG Submenu of the Display Menu.

Keep this in mind when selecting a parameter. See Chapter 2, Displaying Data, for instructions.

Table 16: Measurement Parameter Options

Option Bar Choice Description

[F1] = VEL Flow Velocity

[F2] = VOLUM Volumetric Flow

[F3] = +TOTL Forward Totalized Volume Flow

[F4] = -TOTL Reverse Totalized Volume Flow

[ + [F1] = MDOT Mass Flow

[ + [F2] = +MASS Forward Totalized Mass Flow

[ + [F3] = -MASS Reverse Totalized Mass Flow

[ + [F4] = DIAG Diagnostic

52 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 3. Logging Data

3.2 Creating a Standard Log (cont.)

Refer to Chapter 3, Diagnostics, of the Service Manual for a discussion of the many parameters accessible via the DIAG
option.

Note: The units assigned to the parameters in Table 16 on page 52 are those selected in the User Program (SYSTM

submenu).

6. Use the [, [ and [F1]-[F4] keys to select the second parameter to be logged.

7. Use the [, [ and [F1]-[F4] keys to select the third parameter to be logged.

• If you selected a totalized value for display, go to step 8.

• If you did not, go to step 9.

8. At the Set Log Totals to 0 prompt, press

totals to zero. Choosing YES at this prompt only resets the log totals to zero and has no effect on the meter totals.

[F1] to leave the log totals at their present value or press [F2] to reset the log

3.2.1 Log Type

9. Press [F1] to create a non-circular log or press [F2] to create a circular log.
A non-circular log automatically stops when the meter runs out of memory or the specified END TIME is reached. A

circular log runs continuously until manually stopped, but only the data from the most recent log cycle is saved. At the
start of each cycle, the oldest recorded data is overwritten by the new data from the current cycle.

CAUTION! If data from one circular log cycle exceeds the meter’s memory capacity, the
earliest logged data will be lost.

3.2.2 STARTTIME Prompt

10. Press [F1] to accept the displayed start time or press [F2] to enter a different start time. To start logging immediately,

press [F3].

• If OK was selected, proceed to step 11.

• If NOW was selected, proceed to step 12 if you selected a the non-circular log or to step 14 for a circular log.

• If EDIT was selected, complete the steps listed below.

a. Press

b. Enter the desired Minutes and press [ENT]. The acceptable range is 0 to 59.
c. Enter the desired Seconds and press [ENT]. The acceptable range is 0 to 59.

DigitalFlow™ GF868 Programming Manual (2-Channel) 53

[F1]-[F2] to select AM or PM. Then, enter the desired Hour (1-12) and press [ENT]. (Entry of a start time

earlier than the current time will generate an error message.)

Chapter 3. Logging Data

3.2.3 START DATE Prompt

11. Press [F1] to accept the displayed Start Date or press [F2] to enter a different start date. To start logging today, press

[F3].

• If OK or TODAY was selected, proceed to step 12 for a non-circular log or to step 13 for a circular log.

• Otherwise, complete the following steps to Edit the Start Date.

a. Enter the desired Year and press
b. Use the [, [ and [F1]-[F4] keys to select the desired Month.
c. Enter the desired Day and press [ENT]. The acceptable range is 1 to the number of days in the selected month

(28, 29, 30 or 31).

[ENT]. The acceptable range is 0 to 99.

3.2.4 END TIME Prompt

12. Press [F1] to accept the displayed End Time or press [F2] to enter a different end time. To select a specific time
period for the log to run, press [F3].

• If OK was selected, proceed to the END DATE prompt.

• If TIMED was selected, proceed to the LOG TIME prompt.

• If EDIT was selected, complete the steps on the next page.

Note: The log

result in an error message.

a. Press [F1]-[F2] to select AM or PM. Then, enter the desired Hour (1-12) and press [ENT]. (Entry of a start time

earlier than the current time will generate an error message.)

b. Enter the desired Minutes and press [ENT]. The acceptable range is 0 to 59.

END TIME must exceed the log START TIME by at least five minutes. Failure to observe this r estriction will

c. Enter the desired Seconds and press [ENT]. The acceptable range is 0 to 59.

3.2.5 END DATE Prompt

13. Press [F1] to accept the displayed end date or press [F2] to enter a different end date. To end the log today, press [F3].

• If OK or TODAY was selected, proceed to the TIME INCREMENT prompt. Refer to Figure 17 on page 93 in Appendix

A, Menu Maps for a flow diagram of the programming sequences.

• Otherwise, complete the steps below.

a. Enter the desired Year and press
b. Use the [, [ and [F1]-[F4] keys to select the desired Month.
c. Enter the desired Day and press [ENT]. The acceptable range is 1 to the number of days in the selected month

(28, 29, 30 or 31). The program proceeds to step 15.

54 DigitalFlow™ GF868 Programming Manual (2-Channel)

[ENT]. The acceptable range is 0 to 99.

Chapter 3. Logging Data

3.2.6 DURATION Prompt

If a circular log was specified, the programming sequence continues here after the log start time and/or start date is
entered.

14. Press [F1] and enter a log duration in hours or press [F2] and enter a log duration in days. When the desired value

has been entered, press [ENT]. The program proceeds to step 16.

3.2.7 LOG TIME Prompt

If TIMED was selected at step 12, the programming sequence continues here.

15. Use the [, [ and [F1]-[F4] keys to select the desired log duration.The available options are: 10min, 30min,

60min, 3 HR, 6 HR, 12 HR and 24 HR.

3.2.8 TIME INCREMENT Prompt

Regardless of which of the various options were selected during the previous programming steps, all of the paths
converge at this point.

16. Use the [, [ and [F1]-[F4] keys to select the desired Time Increment. The available options are: 5sec, 10sec,

30sec, 1min, 3min, 6min, 12min, 30min and 60 min.

The time increment is the frequency at which the Model GF868 takes and records data measurements. If any reading
takes longer than the programmed time increment, the log is filled in with the next consecutive reading. For example,
assume that a velocity value of 3 ft/sec is recorded at 12:00:00 in a log with a time increment of five seconds. If the
next reading is 8 ft/sec and it takes the meter 12 seconds to read this value, then both of the missed readings (12:00:05
and 12:00:10) will be filled in with the 8 ft/sec value.

3.2.8a Procedure Options

You have completed entering data for a standard log. You can now do one of the following:

• Use [ and [ to review the previous menu prompts.

• Press [F1]-[F4] to select one of the LOG submenus.

• To return to the data screen and begin logging data, press the [ENT] key.

Although each log is restricted to only three logged parameters, it is still possible to log more than three parameters.
Simply re-enter the
parameters, and run these logs simultaneously with the first log.

STD submenu as many times as necessary to set up additional logs. Select the other desired

DigitalFlow™ GF868 Programming Manual (2-Channel) 55

Chapter 3. Logging Data

3.3 Checking the Memory

Use the MEM submenu to verify that the available log memory is sufficient for the desired log. If the expected amount
of logged data will exceed the remaining memory capacity , the Model GF868 suggests that some old logs be cleared to
make room for the new log.

Press the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the
following steps:

1. To access the Log Menu, press the [LOG] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F2] = MEM.

3. After noting the information, press [ENT] to return to the main Log Menu screen.

The MEM screen lists the number of remaining unused memory pages out of the total number of 120 available pages.
Also, the number of pages expected to be used by all currently programmed logs is given. If the number of pending
pages exceeds the number of free pages, additional memory may be made available by clearing some old logs (see
Chapter 5, Clearing Data).

If it is undesirable to delete old logs to free up additional memory, the number of pages pending may be reduced by
altering the parameters of one or more of the currently active logs. For example, either increasing the time increment or
decreasing the total logging time will reduce the memory requirements for a log file. Use the following equations to
calculate the number of pages used by a log:

number of records

number of pages

=

----------------------------------- ­time increment

number of records

=

------------------------------------------- ­120

(1)

(2)

length of log

Consider a log that is set to run for 24 hours with a time increment of 3 minutes. From Equation 1, the number of
records = (24 x 60)/3 = 480 records. Then, from Equation 2, the number of pages = 480/120 = 4 pages. Thus, at least
four pages of memory must be available for this log to run to completion. Notice that increasing the time increment to
6 minutes or decreasing the length of the log to 12 hours would reduce the memory requirement to only 2 pages.

56 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 3. Logging Data

3.4 Stopping a Log

Use the STOP submenu to terminate a logging process that is currently active. Press the appropriate side of the [SCREEN]
key to activate the desired pane of the display screen, and complete the following steps:

1. To access the Log Menu, press the [LOG] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

Note: Once a log is stopped it cannot be restarted, but the log remains in memory. To clear the log from memory,

refer to Chapter 5, Clearing Data, for instructions.

2. Press [F3] = STOP.

3. Use the [, [ and [F1]-[F4] keys to select a log file to stop.

Note: At the NAME prompt, the option bar will show the names of all completed or active log files that are currently

stored in memory. Recall that a flashing asterisk (*) appears at the far right of the locator bar if the Model
GF868 is currently logging data (see Chapter 3, Operation, of the Startup Guide).

4. Press [F1] to continue logging and return to the initial Log Menu screen. Press [F2] to stop logging and return to the
initial Log Menu screen.

3.4.0a Procedure Options

Do one of the following:

• Press [F1]-[F4] to enter another LOG submenu.

• Press [EXIT] to return to the data screen.

DigitalFlow™ GF868 Programming Manual (2-Channel) 57

Chapter 3. Logging Data

3.5 Creating an ERROR Log

Use the ERROR submenu to create a new error log and to select the logging parameters. An error log updates every 5
seconds (when the display updates), but only if a new error condition occurs. Error logs have a fixed length of 2 pages
and contain sixty records per page. Each record shows the time of the error, the measurement parameter values at that
time, and the error code message. The logged values of the chosen measurement parameters at the time of the error
condition provide valuable troubleshooting information.

Press the appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the
following steps:

1. To access the Log Menu, press the [LOG] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F4] = ERROR.

3. Use the [, [ and [F1]-[F4] keys to inspect a completed log or to change an active log, or enter a new Name (up

to 5 characters) and press [ENT] to create a new log file.

Note: The option bar lists all error logs currently stored in memory. Recall that a flashing asterisk (*) appears at the

far right of the locator bar if the Model GF868 is currently logging data (see Chapter 3, Operation, of the
Startup Guide).

4. At the Log Message prompt, enter a brief description (up to 21 characters) of the log. Press [ENT].

5. Use the [, [ and [F1]-[F4] keys to select the first parameter to be logged. See Table 17 for a list of the available

options.

IMPORTANT: Only the first parameter logged may be graphically displayed (see Chapter 2, Displaying Data).

Table 17: Measurement Parameter Options

Option Bar Choice Description

[F1] = VEL Flow Velocity

[F2] = VOLUM Volumetric Flow

[F3] = +TOTL Forward Totalized Volume Flow

[F4] = -TOTL Reverse Totalized Volume Flow

[ + [F1] = MDOT Mass Flow

[ + [F2] = +MASS Forward Totalized Mass Flow

[ + [F3] = -MASS Reverse Totalized Mass Flow

[ + [F4] = DIAG Diagnostic

58 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 3. Logging Data

3.5 Creating an ERROR Log (cont.)

In addition, refer to Chapter 3, Diagnostics, of the Service Manual for a discussion of the many parameters accessible
via the DIAG option.

Note: The units assigned to the parameters in Table 17 on page 58 are those selected in the User Program (SYSTM

submenu).

6. Use the [, [ and [F1]-[F4] keys to select the second parameter to be logged.

7. Use the [, [ and [F1]-[F4] keys to select the third parameter to be logged.

• If you selected a totalized value for display, go to step 8.

• If you did not, go to step 9.

8. At the Set Log Totals to 0 prompt, press

totals to zero. Choosing YES at this prompt only resets the log totals to zero and has no effect on the meter totals.

[F1] to leave the log totals at their present value or press [F2] to reset the log

3.5.1 Log Type

9. Press [F1] to create a non-circular log or press [F2] to create a circular log.
A non-circular log automatically stops when the meter runs out of memory or the specified END TIME is reached. A

circular log runs continuously until manually stopped, but only the data from the most recent log cycle is saved. At the
start of each cycle, the oldest recorded data is overwritten by the new data from the current cycle.

CAUTION! If data from one circular log cycle exceeds the meter’s memory capacity, the
earliest logged data will be lost.

3.5.2 STARTTIME Prompt

10. Press [F1] to accept the displayed start time or press [F2] to enter a different start time. To start logging immediately,

press [F3].

• If OK was selected, proceed to step 11.

• If NOW was selected, you have finished setting up the error log. Proceed to Procedure Options on page 60.

• If EDIT was selected, complete the steps listed on the next page.

a. Press

b. Enter the desired Minutes and press [ENT]. The acceptable range is 0 to 59.
c. Enter the desired Seconds and press [ENT]. The acceptable range is 0 to 59.

DigitalFlow™ GF868 Programming Manual (2-Channel) 59

[F1]-[F2] to select AM or PM. Then, enter the desired Hour (1-12) and press [ENT]. (Entry of a start time

earlier than the current time will generate an error message.)

Chapter 3. Logging Data

3.5 Creating an ERROR Log (cont.)

3.5.1 START DATE Prompt

11. Press [F1] to accept the displayed Start Date or press [F2] to enter a different start date. To start logging today, press

[F3].

• If OK or TODAY was selected, you have finished setting up the error log. Proceed to Procedure Options below.

• Otherwise, complete the following steps to Edit the Start Date.

a. Enter the desired Year and press
b. Use the [, [ and [F1]-[F4] keys to select the desired Month.
c. Enter the desired Day and press [ENT]. The acceptable range is 1 to the number of days in the selected month

(28, 29, 30 or 31).

[ENT]. The acceptable range is 0 to 99.

3.5.1a Procedure Options

You have completed setting up the error log. Do one of the following:

• Use [ and [ to review the previous menu prompts.

• Press [F1]-[F4] to select one of the LOG submenus.

• T o return to the data screen and begin logging data, press the [ENT] key. The * on the locator bar indicates that the

Model GF868 is now compiling the specified error log.

The error log will continue to run until it is manually stopped, the meter runs out of memory (for a non-circular log), or
the entire 120 records (2 pages x 60 records/page) have been logged.

60 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 4. Printing Data

Chapter 4. Printing Data

4.1 Introduction

The Model GF868 flowmeter has the capability to print any of the data stored in its memory via the built-in RS232
communications port. In order to use the function, the RS232 port must be connected to a printer with a serial port
input. A printer with a parallel port input may be used with a third-party serial-to-parallel adapter.

Note: See Chapter 1, Installation, of the Startup Guide for instructions on wiring the RS232 port. For additional

information, refer to Chapter 6, Serial Communications.

After connecting the Model GF868 to a printer, the Print Menu is used to print live or logged data in either numeric or
graphical format. In addition, any site files stored in memory may be printed. The Print Menu is divided into the
following submenus:

• DATA - use to print live data in numeric or graphical format

• LOG - use to print a log file in numeric or graphical format

• PROG - use to print a site file

• STOP - use to terminate any active print jobs

• PRNTR - use to specify the printer currently connected

• SGNLS - use to print transducer signal array data

• RTDs - use to send the numeric point value of a connected RTD device to the RS232 port.

For purposes of this discussion it is assumed that the left pane of the data display screen is active. If the right pane of
the data display screen is active, all of the instructions remain the same, except that any references to the
should be replaced by the [F5]-[F8] keys.

Refer to Figure 16 on page 92 in Appendix A, Menu Maps, and proceed to the desired section for detailed instructions.
As an additional aid, the relevant portion of the full menu map is reproduced in each section of this chapter. Any
submenu may be followed in the sequence shown or the [ and [ keys may be used to scroll through the prompts.

Note: If a printer has not yet been set up, the instructions in “The PRNTR Submenu” must be completed before

proceeding to any of the other submenus.

[F1]-[F4] keys

DigitalFlow™ GF868 Programming Manual (2-Channel) 61

Chapter 4. Printing Data

4.2 Print Live Data

Use the DATA submenu to print live measurement data, as it is collected. The data may be printed in either numeric or
graphical format, with a user specified time increment.

IMPORTANT: Make sure that a printer has been properly set up before proceeding with this section.

T o print live measurement data, refer to Figure 16 on page 92 of Appendix A, Menu Maps, and complete the following
steps:

1. To access the Print Menu, press the [PRNT] key.

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press [F1] to select the DATA option.

3. Press [F1] = NUM to print the data in numeric format or press [F2] = PLOT to print the data in graphical format.

• If you press [F1], go to step 4.

• If you press [F2], go to step 8.

4.2.1 Numeric Format

4. Use the [, [ and [F1]-[F4] keys to select the first parameter to be printed. See Table 18 for a list of the available
options.

Table 18: Measurement Parameter Options

Option Bar Choice Description

[F1] = VEL Flow Velocity

[F2] = VOLUM Volumetric Flow

[F3] = +TOTL Forward Totalized Volume Flow

[F4] = -TOTL Reverse Totalized Volume Flow

+ [F1] = MDOT Mass Flow

[

+ [F2] = +MASS Forward Totalized Mass Flow

[

+ [F3] = -MASS Reverse Totalized Mass Flow

[

+ [F4] = DIAG Diagnostic

[

Refer to Chapter 3, Diagnostics, of the Service Manual for a discussion of the many parameters accessible via the
option.

Note: The units assigned to the parameters in Table 18 are those selected in the User Program (SYSTM submenu).

DIAG

62 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 4. Printing Data

4.2.1 Numeric Format (cont.)

5. Use the [, [ and [F1]-[F4] keys to select the second parameter to be printed.

6. Use the [, [ and [F1]-[F4] keys to select the third parameter to be printed.

7. Use the [, [ and [F1]-[F4] keys to select the desired time increment (the frequency at which measurements are

taken). The available options are: 5sec, 10sec, 30sec, 1min, 3min, 6min and 12min.

After the time increment is chosen, the Model GF868 returns to the standard data display screen and continues to take
measurements. The live data is printed at the specified time intervals, until a STOP command is issued (see the
instructions for the STOP submenu). A portion of a typical printout is shown in Figure 3.

DATA_DUMP OF (SITE NAME)
Ch1 Channel LABEL Channel Message

4.2.2 Graphical Format

Start Date
Start Time

HH:MM:SS

03:08:40 P
03:08:50 P
03:09:00 P
03:09:10 P
03:09:20 P
03:09:30 P
03:09:40 P
03:09:50 P
03:10:00 P
03:10:10 P
.
.
.

20 OCT 97
03:08:40 PM

CH1 CH1 CH1
VOLUM
ACF/HR

686.85

666.71

662.28

675.59

669.79

675.99

670.70

684.00

680.58

678.12
.
.
.

+TOTL
ACF

218.92

220.83

222.70

224.84

226.71

228.58

230.45

232.57

234.46

236.34
.
.
.

SNDSP
FT/S

1039.147

1039.003

1039.511

1039.509

1039.470

1039.137

1039.105

1039.082

1039.255

1038.860

.
.

Figure 3: Typical Numeric Printout

.

To print live data in graphical format, continue as follows:

8. Use the [, [ and [F1]-[F4] keys to select the first parameter to be printed. See Table 19 on page 64 for a list of

the available options.

DigitalFlow™ GF868 Programming Manual (2-Channel) 63

Chapter 4. Printing Data

4.2.2 Graphical Format (cont.)

Table 19: Measurement Parameter Options

Option Bar Choice Description

[F1] = VEL Flow Velocity

[F2] = VOLUM Volumetric Flow

[F3] = +TOTL Forward Totalized Volume Flow

[F4] = -TOTL Reverse Totalized Volume Flow

[

+ [F1] = MDOT Mass Flow

[

+ [F2] = +MASS Forward Totalized Mass Flow

[

+ [F3] = -MASS Reverse Totalized Mass Flow

[

+ [F4] = DIAG Diagnostic

Refer to Chapter 3, Diagnostics, of the Service Manual for a discussion of the many parameters accessible via the DIAG
option.

Note: The units assigned to the parameters in Table 19 are those selected in the User Program (SYSTM submenu).

9. Enter the desired maximum value for the Y (vertical) axis and press [ENT].

Note: Enter a Y AXIS MAX value that is larger than the largest expected measurement value.

10. At the Y Range prompt, press [F1] to show only the positive Y axis or press [F2] to display both the positive and
negative y axis.

11. Use the [, [ and [F1]-[F4] keys to select the desired Time Increment (the frequency at which measurements are
taken). The available options are: 5sec, 10sec, 30sec, 1min, 3min, 6min and 12min.

After the time increment is chosen, the Model GF868 returns to the standard data display screen and continues to take
measurements. The live data is printed at the specified time intervals, until a STOP command is issued (see the
instructions for the STOP submenu). A portion of a typical printout is shown in Figure 4.

CHANNEL NAME

1.0

.9

.8

.7

.6

.5

.4

.3

.2

.1

0.0
START TIME

03:27:01 PM
20 OCT 97

X-AXIS 50 seconds PER-DIV

Y-AXIS MAX 500 ACF/M

CHANNEL MESSAGE

1.0

0.0

END TIME

03:28:46 PM

20 OCT 97

.9

.8

.7

.6

.5

.4

.3

.2

.1

Figure 4: Typical Graphical Printout

64 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 4. Printing Data

4.3 Printing Logs

Use the LOG submenu to print logged measurement data, from a log file in the meter’s memory. The data may be
printed in either numeric or graphical format, with a user specified time increment.

IMPORTANT: Make sure that a printer has been properly set up before proceeding with this section.

To print logged measurement data, refer to Figure 16 on page 92 of Appendix A, Menu Maps, and complete the
following steps:

1. To access the Print Menu, press the

[PRNT] key.

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press [F2] = LOG.

3. At the Format prompt, press [F1] to print the log in numeric format or press [F2] to print the log in graphical format.

4. Use the [, [ and [F1]-[F4] keys to select a log file to print.

Note: At the NAME prompt, the option bar shows the names of all completed or active log files currently stored in

memory. If an active log is selected for printing, only the data already accumulated at the time of the print
command will be printed.

5. Enter the number of the First Page of the log to print and press [ENT]. (This prompt does not appear if the log file is

only one page long.)

6. Enter the total number of log pages to print and press [ENT]. (This prompt does not appear if the log file is only one

page long.)

• If you chose [F1] (Numeric) at step 3, see the section below.

• If you chose [F2] (Graphic) at step 3, go to the next page.

4.3.1 Numeric Format

After the numeric format (and starting page and number of pages, if applicable) is chosen, the Model GF868 returns to
the standard data display screen and begins printing the log file. The printout continues until the entire log has been
printed or until a STOP command is issued (see the instructions for the STOP submenu). A portion of a typical printout is
shown in Figure 5.

LOG DUMP
LOG NAME Page# 1

LOG MESSAGE

Start Date
Start Time
End Date
End Time

HH:MM:SS

09 SEP 97
11:50:43 AM
09 SEP 97
11:54:45 PM

Ch1 Ch1 Ch2
VOLUM
ACF/HR

+TOTL
ACF

SNDSP
FT/S

Figure 5: Typical Numeric Printout

DigitalFlow™ GF868 Programming Manual (2-Channel) 65

Chapter 4. Printing Data

4.3.2 Graphical Format

After the graphical format (and starting page and number of pages, if applicable) is chosen, complete the following
additional steps:

7. Enter the desired maximum value for the Y (vertical) axis and press [ENT].

Note: Enter a Y AXIS MAX value that is larger than the largest logged measurement value.

8. At the Y Range prompt, press [F1] to show only the positive Y axis or press [F2] to display both the positive and

negative y axis.

The Model GF868 returns to the standard data display screen and begins printing the log file. The printout continues
until the entire log has been printed or until a STOP command is issued (see the instructions for the STOP submenu). A
portion of a typical printout is shown in Figure 6.

1.0

.9

.8

.7

.6

.5

.4

.3

.2

.1

0.0
START TIME

03:27:01 PM
20 OCT 97

CHANNEL NAME

Figure 6: Typical Graphical Printout

X-AXIS 50 seconds PER-DIV

Y-AXIS MAX 500 ACF/M

CHANNEL MESSAGE

1.0

0.0

END TIME

03:28:46 PM

20 OCT 97

.9

.8

.7

.6

.5

.4

.3

.2

.1

66 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 4. Printing Data

4.4 Print Site File

Use the PROG submenu to print the data in a site file that was set up and saved as described in Chapter 1, Programming
Site Data. To print a site file, refer to Figure 16 on page 92 of Appendix A, Menu Maps and complete the following

steps:

IMPORTANT: Make sure that a printer has been properly set up before proceeding with this section.

1. To access the Print Menu, press the [PRNT] key.

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press [F3] = PROG.

3. Use the [, [ and [F1]-[F4] keys to select the desired Site File to print.

Note: All site files currently in memory appear on the option bar. The active site file is always listed as the first choice

(Work).

The Model GF868 returns to the standard data display screen and generates a site file printout similar to the one shown
in Figure 7. The printout continues until the entire file has been printed or until a STOP command is issued (see the
instructions for the STOP submenu on the next page.

PROGRAM PARAMETERS of SITE NAME

Model GX868G3G
Wit

h 1K FIFO and 1113 receiver board

At 9:54:39 AM on 11 FEB 99

CHAN ACTIVE PARAMETERS

Site status
Skan/measure mode

CHAN SYSTEM PARAMETERS

Ch1 Channel LABEL Channel MESSAGE

Equation
Volumetric Units
Volumetric Time
VOL Decimal Digits
Totalizer Units
TOT Decimal Digits 0

Mass Flow Units
Mass Flow Time
MDOT Decimal Digits

Burst
Skan Only

Standard Equation
Thousands ACF
/min
0
Actual cubic ft

Pounds
/sec
0

Figure 7: Typical Site File Printout

DigitalFlow™ GF868 Programming Manual (2-Channel) 67

Chapter 4. Printing Data

4.5 Stop Printing

Use the STOP submenu to terminate the printing of live, logged or site data. To stop any active printing activity, see
Figure 16 on page 92 and complete the following steps:

IMPORTANT: Make sure that a printer has been properly set up before proceeding with this section.

1. To access the Print Menu, press the

[PRNT] key.

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press [F4] = STOP.

3. Press [F1] to continue printing or press [F2] to Stop the currently active printing job.

Note: After the STOP command has been issued, the printer will complete the printing of any data already in the

printer buffer. Either wait for the printer to finish or turn the printer off to empty the buffer immediately.

The Model GF868 returns to the standard data display screen and normal measurement taking.

4.6 Setting Up a Printer

Use the PRNTR submenu to specify the type of printer connected to the Model GF868. To set up a printer, refer to
Figure 16 on page 92 and complete the following steps:

IMPORTANT: A printer must be properly set up before proceeding to any of the other sections in this chapter

1. To access the Print Menu, press the

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press the [ or [ key to display the option bar shown, and then press [F1] to select the PRNTR submenu.

[PRNT] key.

3. Use the [, [ and [F1]-[F4] keys to select the desired Printer Type. See Table 20 for a complete list of the

available options.

Note: For compatibility with the Model GF868, the printer must have an RS232 serial interface. T o use a printer with

a parallel interface, a serial-to-parallel adapter must be used.

Table 20: Available Printer Options

Key(s) Printer Type Description

[F1]

[F2]

[F3]

[F4]

+ [F1] SP401 Syntest SP-401

[

DP411 Seiko Model DPU-411 Type II

XTECH Extech Mini Serial Printer 42

EPSON Epson or Epson-compatible

KODAK Kodak Diconix 150 Plus

After the desired printer type has been selected, the meter returns to the standard data display screen and normal
measurement taking.

68 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 4. Printing Data

4.7 Printing Signal Array Data

Use the SGNLS submenu to print signal array data, to help diagnose certain problems. To print the signal data, see
Figure 16 on page 92 and complete the following steps:

IMPORTANT: Make sure that a printer has been properly set up before proceeding with this section.

1. To access the Print Menu, press the [PRNT] key.

Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press the [ or [ key to display the option bar shown, and then press [F2] to select the SGNLS submenu.

3. Press the [F1]-[F3] keys to select the desired Signal Array data to print. To abort the procedure, press the [EXIT] key.

Note: The SIGNL option causes the raw signal array data to print, while the CROSS option causes the

cross-correlation data to print. The BOTH option prints both sets of data.

After the desired print selection has been made, the Model GF868 returns to the standard data display screen and
normal measurement taking. The specified signal array data is printed continuously, until it is manually stopped. To
terminate signal array printing, use the STOP submenu, as described earlier in this chapter. A portion of a typical
printout is shown in Figure 8.

CH1
0
1
2

SKAN
2
2
2

SIGNAL

0
0

0
.
.
.
757
758
759 40
760
761
762 36

Figure 8: Typical Signal Array Printout

40
41

34
32

44
45
42
34
34
38

DigitalFlow™ GF868 Programming Manual (2-Channel) 69

Chapter 4. Printing Data

4.7 Printing Signal Array Data (cont.)

The data printed via the SIGNL submenu consists of 1024 lines, each of which lists the following three values:

• Index - this is the printout line number, which locates the data point within the complete body of data.

• Upstream - this is the amplitude of the signal from the upstream transducer at the listed index number.

• Downstream - this is the amplitude of the signal from the downstream transducer at the listed index number.

Note: The printouts generated from the

listings.

The data printed in this array permits a comparison of the relative signal strengths of the upstream and downstream
transducers, which are used to calculate a single flow measurement.

CROSS and BOTH submenus will appear after the SIGNL printout, as separate

4.8 Printing RTD Data

Use the R TDs submenu to send the numeric point value of a connected RTD device to the RS232 port for display on a
terminal or RS232 printer. By viewing the point value of the meter at a given temperature, you can calculate the points
at the Set Temperature, and the slope of the RTD input in points/degree. (See Chapter 1, Calibration, of the Service
Manual for more details.)

1. To access the Print Menu, press the [PRNT] key.
Note: The Print Menu is not protected by the security feature and a password is never required to access this menu.

2. Press the [ or [ key to display the option bar shown, and then press [F3] to select the RTDs submenu.

3. At the Dump RTD Data prompt, press [F1] to leave the PRINT menu without dumping data, or [F2] to send the RTD

data to the RS232 port.

After the selection has been made, the Model GF868 returns to the standard data display screen and normal
measurement taking. If you have selected YES at the DUMP RTD DATA prompt, the meter continues to send data until you
reenter the PRINT menu and select the STOP option.

70 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 5. Clearing Data

Chapter 5. Clearing Data

5.1 Introduction

This chapter explains how to purge the Model GF868’s memory of various measurement totals and/or files. The Clear
Menu, which is accessed by pressing the [CLR] key on the keypad, is divided into three submenus:

• TOTAL - used to reset totalized measurement values

• SITE - used to remove site parameter files from memory

• LOG - used to clear log files from memory.

Note: For detailed information on creating a log file, see Chapter 3, Logging Data. For detailed information on

creating a site file and for setting up the stopwatch totalizer, see Chapter 1, Programming Site Data.

For purposes of this discussion it is assumed that the left pane of the data display screen is active. If the right pane of
the data display screen is active, all of the instructions remain the same, except that any references to the
should be replaced by the [F5]-[F8] keys.

[F1]-[F4] keys

IMPORTANT: None of the clearing procedures available via the Clear Menu can be undone. Be very sure that the exact

consequences of a selected option are thoroughly understood before proceeding.

Refer to Figure 17 on page 93 and proceed to the desired section for detailed instructions. Each submenu may be
followed in the sequence shown or the [ and [ keys may be used to scroll through the prompts.

DigitalFlow™ GF868 Programming Manual (2-Channel) 71

Chapter 5. Clearing Data

5.2 Reset Totals

The TOTAL submenu permits the user to reset volumetric totals to zero and to reset the stopwatch totalizer. Press the
appropriate side of the [SCREEN] key to activate the desired pane of the display screen, and complete the following
steps:

1. To access the Clear Menu, press the [CLR] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F1] = TOTAL.

3. Press [F1] to abort the procedure or press [F2] to clear all volumetric totals and reset the stopwatch totalizer . In either

case, the initial Clear Menu prompt returns.

5.2.0a Procedure Options

Do one of the following:

• Press [F1]-[F3] to enter one of the CLR submenus.

• Press the [EXIT] key to return to the data measurement display.

72 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 5. Clearing Data

5.3 Deleting Site Files

Use the SITE submenu to clear site files from the GF868’s memory. Use the [SCREEN] key to activate the desired display
pane, and complete the following steps:

1. To access the Clear Menu, press the [CLR] key.

a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F2] = SITE.

3. At the Site Name prompt, use the [, [ and [F1]-[F4] keys to select a site file for deletion. To leave the SITE

submenu, press the [EXIT] key.

Note: At the Site Name prompt, the option bar shows the names of all site files currently stored in memory.

4. Press [F1] to abort the procedure or press [F2] to Clear the specified site file. If any site files remain in memory, the

Site Name prompt repeats.

When all of the stored site files have been cleared or the [EXIT] key has been pressed at the SITE NAME prompt, the
programming sequence resumes at this point.

5.3.0a Procedure Options

Do one of the following:

• Press [F1]-[F3] to enter one of the CLR submenus.

• Press the [EXIT] key to return to the data measurement display.

DigitalFlow™ GF868 Programming Manual (2-Channel) 73

Chapter 5. Clearing Data

5.4 Deleting Log Files

Use the LOG submenu to clear log files from the Model GF868’s memory . Press the appropriate side of the [SCREEN] key
to activate the desired pane of the data display screen, and complete the following steps:

1. To access the Clear Menu, press the [CLR] key.
a. If you have activated the security feature (see Chapter 1, Programming Site Data, page 35 for details), enter the

assigned password and press [ENT].

2. Press [F3] = LOG.

3. At the Name prompt, the option bar shows the names of all log files currently stored in memory. Use the [, [

and [F1]-[F4] keys to select a log file for deletion. To leave the LOG submenu, press the [EXIT] key.

4. Press [F1] to abort the procedure or press [F2] to Clear the specified log file. If any log files remain in memory, the
Name prompt repeats.

When all of the stored log files have been cleared or the [EXIT] key has been pressed at the Name prompt, the
programming sequence resumes at this point.

5.4.0a Procedure Options

Do one of the following:

• Press [F1]-[F3] to enter one of the CLR submenus.

• Press the [EXIT] key to return to the data measurement display.

74 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 6. Serial Communications

Chapter 6. Serial Communications

6.1 Introduction

The Model GF868 flowmeter is equipped with a standard RS232 serial interface. By using this interface, any log files
stored in the GF868’s memory may be easily uploaded to a personal computer. In order to accomplish this, the
following steps must be completed:

• Connect the GF868 to the personal computer

• Check the GF868 baud rate setting

• Set up the personal computer’s terminal software

• Transfer the log files to the personal computer.

6.2 Wiring the RS232 Interface

The first step is to connect the built-in RS232 port in the GF868 to one of the serial ports (COM1 or COM2) on the
personal computer. Table 21 lists the standard cables available from the factory for this purpose.

Table 21: GE Serial Cables

Part Number PC Connector GF868 Connector

704-659 DB25 Male Flying Leads (5)

704-660 DB9 Male Flying Leads (5)

704-661 DB25 Female Flying Leads (5)

704-662 DB9 Female Flying Leads (5)

Each of the cables listed in Table 21 is available in several standard lengths. However, a user-supplied cable may be
used, if preferred. In either case, wire the GF868 end of the serial cable in accordance with the pin designations listed in
Table 22.

Table 22: RS232 Pin Connections

GF868

Pin #

1 (RTN) Green 7 5

2 (TX) Black 3 2

3 (RX) Red 2 3
4 (DTR) White 20 4
5 (CTS) Yellow 5 8

GE

Cable Color

DB25 Cable

Pin #

DB9 Cable

Pin #

Note: For serial communications between a single GF868 and a single personal computer, no connections are

required to pins 4 and 5 of the GF868’s serial connector. However, these pins should be jumpered together to
ensure proper operation.

DigitalFlow™ GF868 Programming Manual (2-Channel) 75

Chapter 6. Serial Communications

6.3 Checking the GF868 Baud Rate

For successful serial communications, the GF868 and the personal computer must be set up to send/receive data at the
same speed. To check the baud rate setting of the GF868, proceed as follows:

Access the User Program, by pressing the [PROG] key on the keypad. The standard measurement mode screen is
replaced by the following initial programming mode screen:

PROGRAM Start 

PROGRAM
previous selection appears here

CH1 CH2 GLOBL SAVE

PROGRAM Start 

Global PROGRAM
previous selection appears here

CLOCK SYSTM I/O COMM

Global COMM PROGRAM 

Global PROGRAM
Comm port

BAUD RATE
current setting appears here

4800 9600 19200

Press the [F3] key to select the GLOBL menu.

Press the [F4] key to select the COMM Submenu.

To change the baud rate, press the [ key until the desired baud rate appears on
the option bar, and then press the appropriate [Fx] function key.

The available rates are 300, 600, 1200, 2400, 4800, 9600 and 19200 baud. After verifying or changing the baud rate
setting, press the

[EXIT] key three times to return to standard measurement mode.

Note: Refer to Chapter 1, Programming Site Data, for a detailed description of using the COMM Submenu.

76 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 6. Serial Communications

6.4 Setting Up the Terminal Software

Specific instructions are given in this manual for communicating with personal computers running under either the
Windows 3.X or Windows 9X/NT operating systems. Proceed to the appropriate section for detailed set up procedures.

Note: For computers operating under other operating systems, contact the factory for assistance or consult the

operating system manual supplied with the computer.

6.4.1 Windows 3.X Systems

To set up serial communications with a personal computer running under Windows 3.X, make sure the GF868 is
powered on and complete the following steps:

1. In Windows 3.X, select the Terminal Function, which is usually located in the Accessories window.

2. The Terminal Screen appears, with six menus located at the top of the screen. Using the Settings Menu, select the

Communications option.

3. When the Communications Screen appears, make the following selections:

• Baud Rate - set to the same value as the GF868 setting

• Data Bits - 8

• Stop Bits - 1

• Parity - None

• Flow Control - Xon/Xoff

• Connector - select the correct communications port

• Parity Check - not checked

• Carrier Detect - not checked

4. Using the Transfer Menu, select the Receive Text File option.

5. A window appears asking for a file name. Select the desired directory and file name (with .prt extension) and then

click on OK.

6. From the keypad on the GF868, enter the

numeric format. See Chapter 4, Printing Data, for detailed instructions on this procedure.

7. The logged data will begin appearing on the computer screen. After the transfer has been completed, the uploaded

file may be used in any software program, just like any other text file.

Note: If the RS232 link does not function, switching the leads to pins 2 (TX) and 3 (RX) at the RS232 connector on the

meter often solves the problem.

PRINT menu and select the log file to be uploaded to the computer in

DigitalFlow™ GF868 Programming Manual (2-Channel) 77

Chapter 6. Serial Communications

6.4.2 Windows 9X/NT Systems

Windows 9X/NT systems use a program called Hyperterminal to access the serial ports. To set up serial
communications with a personal computer running under Windows 95, Windows 98 or Windows NT, make sure the
GF868 is powered on and complete the following steps:

1. From the Windows START menu, select PROGRAMS>ACCESSORIES>HYPERTERMINAL>HYPERTERMINAL.

2. The NEW CONNECTION window should appear (if it does not, select it from the FILE menu). After entering the

desired CONNECTION NAME and selecting an ICON, click on OK.

3. When the CONNECT TO window appears, select the serial communications port (COM1 or COM2) to which the

GF868 is connected and click on OK.

4. When the COMx PROPERTIES window appears, make sure the settings are as follows:

• Bits per Second: 9600 (must match the GF868 setting)

• Data Bits: 8

• Parity: None

• Stop Bits: 1

• Flow Control: Xon/Xoff

After making any necessary changes, click on

5. Open the TRANSFER menu and select CAPTURE TEXT. Enter the desired DRIVE:\DIRECTORY\FILENAME for the file about

to be transmitted, and click on OK.

6. From the keypad on the GF868, enter the PRINT menu and select the log file to be uploaded to the computer in

numeric format. See Chapter 4, Printing Data, for detailed instructions on this procedure.

7. The logged data will begin appearing on the computer screen. When the transfer has been completed, open the

TRANSFER menu and select CAPTURE TEXT>STOP. The uploaded file may now be used in any software program, just

like any other text file.

Note: If the RS232 link does not function, switching the leads to pins 2 (TX) and 3 (RX) at the RS232 connector on the

meter often solves the problem.

OK.

78 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 6. Serial Communications

6.5 The Optional RS485 Serial Interface

Although the standard RS232 serial interface included with the Model GF868 is adequate for most applications, GE
offers an optional RS485 serial interface upgrade for special situations. The Model GF868 is easily modified to provide
RS485 communications, and this section describes the wiring and use of the special RS232 to RS485 converter.

Note: For compliance with the European Union’s Low Voltage Directive, this unit requires an external power

disconnect device such as a switch or circuit breaker. The disconnect device must be marked as such, clearly
visible, directly accessible, and located within 1.8 m (6 ft) of the electronics console.

6.5.1 Interface Converter Mounting

A special bracket containing the serial interface converter and a three-terminal barrier strip is mounted inside the
Model GF868, just below the RS232 terminal block (see Figure 9). The standard RS232 terminal block is wired to the
input of the serial interface converter, and the RS-485 output of the serial interface converter is wired to the barrier
strip.

G – + DC

G N/L2 L1 AC

Grounding
Screw

Green (XMT–)

Figure 9: Interface Converter Mounting

RS 232

CD R

TTTRT

XX

SNR

- XMT +

Red (XMT+)

RS232 Terminal Block

Standoff

Mounting Bracket

Barrier Strip

LVD Shroud

CHAN 1

DN

UP

S

I

T

G

D
C
R
S

SIRTR
GNN

DigitalFlow™ GF868 Programming Manual (2-Channel) 79

Chapter 6. Serial Communications

6.5.2 Point-To-Point Wiring

Standard factory wiring of the RS485 serial interface is configured for point-to-point wiring. That is, a single Model
GF868 may be wired directly to a single personal computer. To connect the RS485 serial interface, refer to Figure 9 on
page 79 and complete the following steps:

Note: For compliance with the European Union’s Low Voltage Directive, a transparent plastic shroud protects the

electrical connections. The shroud must remain in place, except while wiring the unit. Reinstall the shroud
after the wiring has been completed.

1. Disconnect the main power to the electronics console and open the cover.

WARNING! Dangerous voltages exist within the electronics console. Do not perform any wiring
operations until the main power to the unit has been disconnected.

2. Remove the clear plastic shroud that covers the electrical connectors.

3. Using a twisted-wire pair, connect the XMT+ terminal of the barrier strip to the T+/R+ terminal of the PC’s RS485

adapter and connect the XMT– terminal of the barrier strip to the T-/R- terminal of the PC’s RS485 adapter (see the
documentation provided with the RS485 adapter for details).

Note: The XMT+ terminal on the barrier strip is the screw opposite the red wire connection and the XMT– terminal

on the barrier strip is the screw opposite the green wire connection.

4. Reinstall the clear plastic shroud, close the cover to the electronics console and reconnect the main power.
The RS485 serial interface is now ready for point-to-point operation. However, the installed version of the Model

GF868 software must be Version 3G or higher to support RS485 operation. If necessary, contact the factory for
information about a software upgrade.

6.5.3 Multi-Point Wiring

The standard point-to-point wiring configuration for the serial interface converter may be modified to permit the use of
a multi-point wiring arrangement. In a multi-point RS485 system, one flowmeter (the master) is connected to the
personal computer, while a number of additional flowmeters (the slaves) are chained together and connected to the
master flowmeter. In order to implement such a system, the DIP switch settings inside each serial interface converter
must be changed.

IMPORTANT: The serial interface converter in the last slave unit in the chain should not be reconfigured.

80 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 6. Serial Communications

6.5.3a Reconfiguring a Serial Interface Converter

To reconfigure a serial interface converter for multi-point wiring, complete the following steps:

1. Disconnect the main power to the electronics console and open the cover.

WARNING! Dangerous voltages exist within the electronics console. Do not perform any wiring
operations until the main power to the unit has been disconnected.

2. Remove the clear plastic shroud that covers the electrical connectors.

3. Remove the serial interface converter mounting bracket by removing the standoff located just below the

RS232

terminal block and the grounding screw just to its left (see Figure 9 on page 79).

4. Loosen the two screws that fasten the DB9 connector to the mounting bracket, and remove the serial interface

converter from the bracket.

5. Use a small screwdriver to pry open the plastic case of the serial interface converter, as shown in Figure 10.
The serial interface converter contains a main printed circuit board and a daughter printed circuit board. The daughter

board has a small terminal block attached to it and the main board has a DIP switch (SW1) mounted near the center of
the board.

6. Locate the switch assembly on the main board, and move the switch in position 1 from ON to OFF. The standard

ON state for this switch is for point-to-point operation, while the OFF state is needed for multi-point operation. See
Table 23 on page 82 for the proper settings of all four switches on the switch assembly.

Plastic Case

Mounting Screw

Screwdriver

DB9 Connector

Figure 10: Opening the Converter Case

DigitalFlow™ GF868 Programming Manual (2-Channel) 81

Chapter 6. Serial Communications

6.5.3 Multi-Point Wiring (cont .)

6.5.3a Reconfiguring a Serial Interface Converter (cont.)

Table 23: Switch Assembly Settings

Position # Point-To-Point Multi-Point

1 ON OFF

2ONON

3ONON

4 OFF OFF

7. Reassemble the serial interface converter and secure it to the mounting bracket with the two mounting screws.

8. Reinstall the mounting bracket into the electronics enclosure and secure it with the standoff and the grounding

screw.

6.5.3b Wiring the System

After the serial interface converters have been configured for multi-point operation, the system can be wired.

1. Using twisted-wire pairs, connect the XMT+ terminals of all the flowmeters together and connect the XMT–

terminals of all the flowmeters together.

IMPORTANT: Make sure that the flowmeter with the non-modified converter is wired as the last unit in the chain.

2. Using a twisted-wire pair, connect the XMT+ terminal of the barrier strip to the T+/R+ terminal of the PC’s RS485

adapter and connect the XMT– terminal of the barrier strip to the T-/R- terminal of the PC’s RS485 adapter (see the
documentation provided with the RS485 adapter for details).

Note: The XMT+ terminal on the barrier strip is the screw opposite the red wire connection and the XMT– terminal

on the barrier strip is the screw opposite the green wire connection.

3. Reinstall the clear plastic shroud, close the cover to the electronics console and reconnect the main power.
The RS485 serial interface is now ready for multi-point operation.

IMPORTANT: The installed version of the Model GF868 software must be Version 3G or higher to support RS485

operation. If necessary, contact the factory for information about a software upgrade.

82 DigitalFlow™ GF868 Programming Manual (2-Channel)

Chapter 6. Serial Communications

6.6 Setting Up an Ethernet Connection

A modified GF868 can use the Ethernet interface to communicate with an internal network. An optional Ethernet card
with a unique MAC (IP) address (installed only in slots 5 or 6) includes an RJ45 connector. To connect the
Ethernet-enabled GF868 to the network, insert the jack of an RJ45 cable into the RJ45 connector, route the cable
through the bottom of the GF868, and wire the other end of the cable to the LAN according to the manufacturer’s
instructions.

To establish Ethernet communications with the GF868, you must install the Ethernet Device Discovery software utility
(available with your modified GF868) on a PC connected to the LAN. Once installed and running, the software
displays all Ethernet devices currently connected to the subnet. You can identify the GF868 by its MAC address,
supplied as part of customer documentation. The default IP Port is 2101.

The default IP addressing for the GF868 is DHCP (dynamic). If you need to assign a static IP address to the GF868,
complete the following steps:

IMPORTANT: To assign a static IP address, the GF868 must be connected to an Ethernet network with a dynamic

address assignment mechanism (DHCP) first.

1. Run Ethernet Device Discovery software, and identify the GF868’s current IP address.

2. Open your Internet browser (Internet Explorer, Netscape, or other) and type the GF868 IP address in the Address

box.

3. The Connect ME Configuration and Management window opens. Two text boxes ask for the user name and

password.

a. In the Username text box, type root.
b. In the Password text box, type dbps.

4. At the left of the window, click on Network.

5. The IP Settings window opens. In the text boxes for IP Address, Subnet Mask, and Default Gateway, type in the new

information.

6. Click Apply. The software applies the new address.

DigitalFlow™ GF868 Programming Manual (2-Channel) 83

Chapter 6. Serial Communications

6.7 Setting Up a MODBUS/TCP Connection

A modified GF868 can use the MODBUS/TCP interface to communicate with an internal network. An optional
MODBUS/TCP card with a unique MAC (IP) address (installed only in slots 5 or 6) includes an RJ45 connector. To
connect the MODBUS/TCP-enabled GF868 to the network, insert the jack of an RJ45 cable into the RJ45 connector,
route the cable through the bottom of the GF868, and wire the other end of the cable to the LAN according to the
manufacturer’s instructions.

To establish MODBUS/TCP communications with the GF868, you must install the Ruiping software utility (available
with your modified GF868) on a PC connected to the LAN. Once installed and running, the software displays all
Ethernet devices currently connected to the subnet. You can identify the GF868 by its MAC address, supplied as part of
customer documentation. The default TCP Port is 502.

The default IP addressing for the GF868 is DHCP (dynamic). If you need to assign a static IP address to the GF868,
complete the following steps:

IMPORTANT: To assign a static IP address, the GF868 must be connected to an Ethernet network with a dynamic

address assignment mechanism (DHCP) first.

1. Run Ruiping software, and identify the GF868’s current IP address.

Note: “Ruiping-e” will return the found IP address as well as the MAC address.

2. From a DOS command prompt, type: telnet “ip address” 10000

3. The “Welcome to Net+Works Configuration Utility” opens. Type in the login name and password.
a. Login: type root.
b. Password: type Netsilicon.

4. In the Main Menu:
a. Select IP Parameters (1). Enter the desired IP changes and return to the Main Menu.
b. Select Enable DHCP Client (3). Select N (2) to disable, then select 4 for Main Menu.
c. At the Main Menu, select 4 for Quit. Power cycle the GF868 (i.e., turn the meter off and on) to apply the

changes.

84 DigitalFlow™ GF868 Programming Manual (2-Channel)

Appendix A. Menu Maps

Appendix A. Menu Maps

DigitalFlow™ GF868 Programming Manual (2-Channel) 85

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86 DigitalFlow™ GF868 Programming Manual (2-Channel)

Appendix A. Menu Maps

DigitalFlow™ GF868 Programming Manual (2-Channel) 87

PIPE SETUPSYSTMACTIV

F1 F2 F3 F1

PROG

NOTE: Plain text represents prompt area messages and
boxed text represents option bar choices.
Fx represent function keys to select option bar choices.

VOLUMETRIC UNITS

F1 F2

ACM KACM

F3

F2

KACF

F1

ACF

F3

F4

/DAY

F3

/HR

F2

/MIN

F1

/SEC

VOLUMETRIC TIME

F2

S/M

F1

Skan

CHANNEL LABEL
CHANNEL MESSAGE

F4 F1

SCM KSCM

F2

F1

KSCF

F4

SCF

F2

(English)

(Metric)

F4

3

F3

2

F2

1

F1

0

VOL DECIMAL DIGITS

TOTALIZER UNITS

F1 F2

ACM KACM

F3

F2

KACF

F1

ACF

F3

F4 F1

SCM KSCM

F2

F1

KSCF

F4

SCF

F2

(English)

(Metric)

F4

3

F3

2

F2

1

F1

0

TOTAL DECIMAL DIGITS

F4 F1

TONS KG

F3

F2

KLB

F1

LB

F2

MMLB

F4

/DAY

F3

F2

/MIN

F1

/SEC /HR

F4

3

F3F2

1

F1

0

2

MASS FLOW TIME

MDOT DECIMAL DIGITS

F4 F1

TONS KG

F3

F2

KLB

F1

LB

F2

MMLB

F4

3

F3

F2

1

F1

0

2

MASS DECIMAL DIGITS

MASS (TOTALIZER)

F4 F1

500k 25k

F3

F2

100k

F1

50k

F2

200k

FREQUENCY

SPECIAL TRANSDUCER #

Tw

33k

F1

SPEC

F2

m

F1

F2

feet

F1

inch

mm

m/PIft/PIin/PI mm/PI

F4F3F4F3

(English)

(Metric)

PIPE OD

F4

m

F3

mm

F2

feet

F1

inch

(English)

F4

F3F2F1

AXIAL LENGTH L

PIPE WALL

PATH LENGTH P

(Metric)

mmm

feet

inch

REYNOLDS CORRECTION

F2

F1

ONOFF

CALIBRATION FACTOR

KINETIC VISCOSITY

MASS FLOW

TRANSDUCER NUMBER

See Figure A-2

F4 F1

SAVE RECLL

F3

F2

CH2

F1

CH1

PROGRAM

Channel PROGRAM

F2

BURST

F1

OFF

Channel Status

Skan/Measure Mode

I/O

F4

See Figure A-2

Figure 11: ACTIV, SYSTM and PIPE Menu Map

PIPE I/O SETUPSYSTMACTIV

See Figure A-1See Figure A-1 See Figure A-1

SIGNL

DELTA T OFFSET

AMP. DISCRIM HIGH

AMP. DISCRIM LOW

ACCELERATION LIMIT

VELOCITY HIGH LIMIT

VELOCITY LOW LIMIT

COR. PEAK LIMIT

SIGNAL LOW LIMIT

AVRG INIT ADVAN

NO YES

Press YES to Default

F1 F2 F3 F4 F1

PROG

F1

% of Peak

F1 F2 F3 F4 F1

XMIT SAMPLE SIZE

T WINDOW (cycles)

# Transmit Pulses

A Divisor

# shifts

R WINDOW (cycles)

F1 F2 F3

F4

F1 F2

F3

12

5

10

30 60

STATS

RESPONSE TIME

F2F1

MULTK

MASS

F2 F3

F1 F2

NO

YES

F1 F2

Edit table?

# of K factors

Velocity # x

K Factor # x

NO

YES

F1 F2

Static Density?

NOTE: Plain text represents prompt area messages and
boxed text represents option bar choices.
Fx represent function keys to select option bar choices.

8

42

16 32

Skan T OFFSET

M>S_Switch

SET UP

PROGRAM

F1 F2 F3

F4 F1 F2 F3

FIXED SLOT1 SLOT2 SLOT3 SLOT4 SLOT5 SLOT6

F1 F2

AB

F1 F2 F3

F4 F1 F2 F3

FIXED SLOT1 SLOT2 SLOT3 SLOT4 SLOT5 SLOT6

A:LABEL B:LABEL

FIXED TEMP.

BASE TEMP.

PRESSURE INPUT

F1 F2

AB

A:LABEL B:LABEL

FIXED PRESSURE

BASE PRESSURE

F1 F2 F3

F4 F1 F2 F3

FIXED SLOT1 SLOT2 SLOT3 SLOT4 SLOT5 SLOT6

N2 INPUT

F1 F2

AB

A:LABEL B:LABEL

FIXED N2

ZERO CUTOFF

TEMP INPUT

OFF ON

F1 F2

Multi K-factors

F1 F2 F3

F4 F1

CH1 CH2 GLOBL SAVE RECLL

Channel PROGRAM

F4

Rho

Mw

F1 F2

Density Type?

Mole Weight

AcVOL

StVOL

F1 F2

Fluid Density

Figure 12: CH1/CH2 - I/O and Setup Menu Map

Appendix A. Menu Maps

DigitalFlow™ GF868 Programming Manual (2-Channel) 89

COMMSYSTMCLOCK

F1 F2 F4

PROG

NOTE: Plain text represents prompt area messages and
boxed text represents option bar choices.
Fx represent function keys to select option bar choices.

F1 F2

AUTO

MNUAL

VOLUMETRIC UNITS

F1 F2

ACM KACM

F3

F2

KACF

F1

ACF

F3

F4

/DAY

F3

/HR

F2

/MIN

F1

/SEC

VOLUMETRIC TIME

F4

DEC

F1

JAN

SYSTEM UNITS

F4 F1

SCM KSCM

F2

F1

KSCF

F4

SCF

F2

F4

3

F3

2

F2

1

F1

0

VOL DECIMAL DIGITS

TOTALIZER UNITS

F1 F2

ACM KACM

F3

F2

KACF

F1

ACF

F3

F4 F1

SCM KSCM

F2

F1

KSCF

F4

SCF

F2

F4

3

F3

2

F2

1

F1

0

TOTAL DECIMAL DIGITS

F4 F1

TONS KG

F3

F2

KLB

F1

LB

F2

MMLB

F4

/DAY

F3

F2

/MIN

F1

/SEC /HR

F4

3

F3

F2

1

F1

0

2

MASS FLOW TIME

MDOT DECIMAL DIGITS

F4 F1

TONS KG

F3

F2

KLB

F1

LB

F2

MMLB

(English)

(Metric)

F4

3

F3

F2

1

F1

0

2

MASS DECIMAL DIGITS

MASS (TOTALIZER)

F4 F1

2400 4800

F3

F2

600

F1

300

F2

1200 9600

F4

SITE4

F3

SITE3

F2

SITE2

F1

SITE1

F4

F3F2F1

SITE NAME

SITE4SITE3SITE2SITE1

(English)

(Metric)

F4 F1

SAVE RECLL

F3

F2

CH2

F1

CH1

PROGRAM

Global PROGRAM

F2

EDIT

F1

OK

DATE

MONTH

I/O

F3

See Figure A-4

YEAR

F2

PM

F1

AM

F2

EDIT

F1

OK

TIME

HOUR

MINUTES

SECONDS

DAY

F1 F2

ENG METRC

PRESSURE UNITS

F1 F2

PSIa

PSIg

F1 F2

BARa

BARg

F3 F4

KPaa

KPag

GAGE PRESSURE

STOPWATCH TOTALIZER

F3

19200

BAUD RATE

F4 F1

7,odd

7even

F3

F2

8,odd

F1

8,no

8even

F3

F2

4800

F1

2400 9600

F3

F2

ODD

F1

NONE EVEN

F2

2

F1

1

MASS FLOW

UART Bits

Network I.D.?
MODBUS Baud Rate

MODBUS Parity

MODBUS Stop Bits

MODBUS Address

SECUR

F1

F2

LOCK

F1

UNlck

F2

YES

F1

NO

LOCK OUT

ENTER PASSWORD

? EDIT PASSWORD

ENTER NEW PASSWORD

VERIFY NEW PASSWORD

SITE NAME

F4

19200

Figure 13: GLOBL (except I/O), SAVE and RECLL Menu Map

Appendix A. Menu Maps

DigitalFlow™ GF868 Programming Manual (2-Channel) 90

F1

PROG

NOTE: Plain text represents prompt area messages and
boxed text represents option bar choices.
Fx represent function keys to select option bar choices.

PROGRAM

ERROR HANDLING

F1

A

F2

F4*

D

F3*

CB

(*available for Slot x only)

F4 F1

SAVE RECLL

F3

GLOBL

F2

CH2

F1

CH1

Global PROGRAM

F4 F1

COMM SECUR

F3

I/O

F2

SYSTM

F1

CLOCK

Global I/O

ERROR

F1 F2

HOLD NO UP

F1 F2

NO YES

F2

OPTN

F1 F2

SLOT0 SLOTX

Slot 0/x Output X

F1

OFF

F2

F3

4-20m0-20m

F1

CH1

F2

F4

DIF

F3

SUMCH2

F1

AVE

Channel

F1

VEL

F2

F4

–TOTL

F3

+TOTLVOLUM

F1**

MDOT

F2**

F4

DIAG

F3**

–MASS+MASS

ZERO

FULL

Slot 0 - Analog Outputs

F1 F2

AB

F1 F2

OFF TEMP

Slot x - RTD Inputs

LABEL

FULL Scale Value

ZERO

Slot x - Analog Outputs

F1

A

F2

F4

D

F3

CB

Slot x Output X

F1

OFF

F2

F3

TTLZR

FREQ

F1

CH1

F2

F4

DIF

F3

SUMCH2

F1

AVE

Channel

F1

VEL

F2

F4

–TOTL

F3

+TOTLVOLUM

F1**

MDOT

F2**

F4

DIAG

F3**

–MASS+MASS

BASE

FULL

Output measurement

Slot x - Freq/Total Outputs

F1

+TOTL

F2

F4**

–MASS

F3**

+MASS–TOTL

FREQ

Output measurement

TTLZR

FULL SCALE FREQUENCY

UNITS/PULSE

Entity to totalize

F1

A

F2

B

F1

OFF

F2

F4

SPEC

F3

TEMPPRESR

Slot x - Analog Inputs

Input measurement

INPUT UNITS

LABEL

FULL Scale Value

ZERO Value

INPUT

F1

VEL

F2

F4

–TOTL

F3

+TOTLVOLUM

F1**

MDOT

F2**

F4

DIAG

F3**

–MASS+MASS

Min. Pulse ON Time

Value

I/O

Slot x

(Option Card)

F1

A

F2

B

F1

OFF

F2

F4

FAULT

F3

LOWHIGH

Slot x - Alarms

Slot x Alarm X

F3

C

F1

NO

F2

YES

F1

CH1

F2

F4

DIF

F3

SUMCH2

F1

AVE

Channel

HIGH/LOW

FAULT

Output measurement

Trigger point

NAME

Failsafe?

(**available only if Static Density? = YES)

(**available only if Static Density? = YES)

(**available only if Static Density? = YES)

Figure 14: GLOBL - I/O Menu Map