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)
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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)
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