Micro Motion Signal Converter With Gas Sotware - Model 7951 Manuals & Guides

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Operating Manual

MMI-20019472, Rev. AA April 2011

7951 Signal Converter

(With gas software 1020)

Klippon Connector Model

D-Type Connector Model

Micro Motion

7951 Signal Converte

Introduction

The Micro Motion used for dual-channel/stream gas applications.

Software Version: 1020 – Gas Applications.

Models Covered

7951MAA0*****

Models Covered

7951MAB0*****

7951 Signal Converter can be

IMPORTANT NOTICE

Because we are continuously improving our products, some of the menus which appear on your instrument’s display may not be exactly as illustrated and described in this manual. However, because the menus are simple and intuitive, this should not cause any major problems.

This manual is concurrent with embedded software version 511020, issue 2.11

Static precautions

Some parts of the instrument (such as circuit boards) may be damaged by static electricity. Therefore, when carrying out any work which involves the risk of static damage to the instrument, the instructions show the following notice:

CAUTION

At such times you must wear an earthed wrist-strap to protect the instrument.

While carrying out this procedure, you must wear an earthed wrist strap at all times to protect the instrument against static shock.

Safety information

NOTE: This information applies only to those instruments which are mains-powered.

Electricity is dangerous and you risk injury or death if you do not disconnect the power supplies before carrying out some of the procedures given in this manual. Whenever there is such a hazard, the instructions show a notice similar to the following:

WARNING

You must heed any such warnings and make sure that, before you go any further:

Electricity is dangerous and can kill. Disconnect all power supplies before proceeding.

• All power leads are un-powered.

• All power leads are disconnected from the equipment which you are working on unless the

instructions tell you otherwise.

• You obey any other common-sense precautions which may apply to your situation. If you obey these sensible precautions, you can work on the equipment in complete safety.

Battery-backed Memory notice

• It is essential that the Lithium Cell used for the battery backup is installed at all times (other than during replacement). The 7951 Micro Motion

If it is necessary to run the units without batteries for Intrinsic Safety reasons, then the battery should be replaced with a shorting disk inserted in the battery holder. Please consult the factory for further advice.

• Replace the battery when the "Low Battery" system alarm is indicated. The procedure is in Chapter 14.

Signal Converter will not power-up correctly if this battery is missing.

1. About this manual 1.1

1.1 What this manual tells you 1.1

1.2 Who should use this manual 1.1

1.3 Software versions covered by this manual 1.1

2. Getting started 2.1

2.1 What this chapter tells you 2.1

2.2 What the examples show you 2.1

2.3 If you need help… 2.1

2.4 Example 1: 7951 with a 7812 Gas density transducer 2.2

2.5 Example 2: 7951 with a 3098 Gas specific gravity transducer 2.6

2.6 Example 3: 7951 with a mA-type temperature transmitter 2.9

2.7 Example 4: 7951 with a mA-type pressure transmitter 2.11

2.8 Example 5: 7951 with a RTD-type temperature transmitter 2.14

3. About the Micro Motion® 7951 3.1

3.1 Background 3.1

3.2 What the 7951 Dual Channel Gas Signal Converter does 3.1

3.3 Physical description of the 7951 3.2

3.4 Communications 3.2

3.5 Typical installations 3.3

3.6 Checking your software version 3.3

4. What you can connect to a 7951 4.1

The information in this chapter has been moved to Appendix C

5. Installing the system 5.1

5.1 What this chapter tells you 5.1

5.2 Hazardous and non-hazardous environments 5.1

5.3 Installation procedure 5.1

5.4 Step 1: Drawing up a wiring schedule 5.1

5.5 Step 2: Unpacking the instrument 5.2

5.6 Step 3: Setting DIP-switches 5.3

5.6.1 Analog input DIP-switches 5.3

5.6.2 Turbine voltage selection switch 5.3

5.7 Step 4: Fitting the 7951 5.4

5.8 Step 5: Making the external connections 5.6

5.9 Step 6: Earthing the instrument 5.6

5.10 Step 7: Connecting the power supply 5.8

6. The keyboard, display and indicators 6.1

6.1 What this chapter tells you 6.1

6.2 The layout of the front panel 6.1

6.3 What the display shows 6.2

6.4 How the buttons work 6.2

6.5 Using the buttons to move around the menus 6.2

6.6 Using the buttons to view stored data 6.3

6.7 Using the buttons to edit information 6.4

6.7.1 Text editing 6.4

6.7.2 Multiple-choice option selection 6.5

6.7.3 Numerical editing 6.5

6.7.4 Date and time editing 6.6

6.8 The 7951 character set 6.7

6.9 LED indicators 6.7

6.10 Summary of key functions 6.8

7. The menu system 7.1

7.1 What this chapter tells you 7.1

7.2 What the menu system does 7.1

7.3 How the menu system works 7.1

8. Alarms 8.1

8.1 Alarms 8.1

8.1.1 Alarm types 8.1

8.1.2 Alarm indicators 8.1

8.1.3 How alarms are received and stored 8.2

8.1.4 Examining the Alarm Status Display and Historical Alarm Log 8.2

8.1.5 What the Status Display tells you 8.3

8.1.6 What the entries in the Historical Log tell you 8.3

8.1.7 Clearing all alarms in the Historical Alarm Log 8.4

8.1.8 Alarm messages 8.4

9. Additional facilities 9.1

9.1 What this chapter tells you

9.2 Selecting units and data formats 9.1

9.3 Limits 9.1

9.4 Fallback values and modes 9.2

9.1

9.5 Analogue 0% and 100% values 9.2

9.6 Live and set data 9.2

9.7 Units which the 7951 can display 9.3

10. Configuring the instrument using wizards 10.1

10.1 What this chapter tells you 10.1

10.2 Wizards : Configuring the easy way 10.1

10.3 Wizard Maps : Conventions used 10.1

10.4 Quick-start Guide ( Set-up Wizards ) 10.3

10.5 Set-up wizard selection map 10.4

10.6 Units wizard selection map 10.5

10.7 Density 1 application wizard 10.7

10.8 Density 2 application wizard 10.8

10.9 SG-1 application wizard 10.9

10.10 SG-2 application wizard 10.11

10.11 SG-1&2 application wizard 10.12

10.12 Line density wizard 10.13

10.13 Base density wizard 10.16

10.14 Specific gravity wizard 10.18

10.15 Temperature wizard 10.20

10.16 Pressure wizard 10.22

10.17 Transmitter wizard 10.24

10.18 Special calculation wizard 10.27

10.19 Analogue outputs wizard 10.28

10.20 Alarms wizard 10.29

10.21 Multi-view wizard 10.30

10.22 Full setup wizard 10.31

11. Configuring the 7951 using the menus 11.1

11.1 What does configuration involve? 11.1

11.2 Before you start 11.1

11.3 Recommended sequence for configuration 11.2

11.4 What Sections 11.5 - 11.18 tell you 11.3

11.5 Configuring analogue inputs 11.5

11.6 Configuring transducer details 11.6

11.7 Configuring transmitter detail 11.7

11.8 Configuring line density 11.11

11.9 Configuring base density 11.16

11.10 Configuring specific gravity 11.19

11.11 Configuring energy 11.22

11.12 Configuring custom applications 11.24

11.13 Configuring mA outputs 11.25

11.14 Configuring other parameters

11.15 Configuring Multiview 11.30

11.26

12. Routine operation 12.1

12.1 What this chapter tells you 12.1

12.2 The menu diagrams 12.1

12.3 Security and passwords 12.8

12.4 How you can edit displayed information 12.8

12.5 Making data values Live or Set 12.10

12.6 Changing the units which are displayed 12.11

12.7 Changing fallback values 12.11

12.8 Changing the time and date 12.11

12.9 Checking the performance of the 7951 12.11

12.10 Giving your 7951 a unique identifier 12.12

12.11 Printed reports 12.12

13. Routine maintenance and fault-finding 13.1

13.1 Cleaning the instrument 13.1

13.2 Fault-finding 13.1

14. Removal and replacement of parts 14.1

14.1 Front panel assembly 14.1

14.2 Display 14.1

14.3 Switch panel 14.2

14.4 Processor board 14.2

14.5 Power supply board 14.3

14.6 Connector Board 14.3

14.7 Fuse 14.3

14.8 Back-up battery 14.4

14.9 Rear Panel Assembly 14.5

14.10 Mother Board 14.6

15. Assembly drawing and parts list 15.1

15.1 What the drawing and parts list tells you 15.1

15.2 How to obtain spare parts 15.1

Appendices

Appendix A Glossary A.1

Appendix B Blank wiring schedule B.1

Appendix C Technical data for the 7951 C.1

Appendix D Calculations and theory D.1

1. About this manual

1.1 What this manual tells you

This manual tells you how to install, configure, operate, and service the instrument. In addition, some information is given to help you identify and correct some of the more common faults which may occur. However, since repairs are done by changing suspected faulty assemblies, fault-finding to board component level is not covered.

This manual assumes that all devices or peripherals to be connected to the 795x have their own documentatio n which tells you how to install and configure them. For this reason it is assumed that anything which you want to link to the 795x is already installed and working correctly in accordance with the manufacturer’s instructions.

Since the instrument can be used for a wide variety of purposes, it is driven by software specially for your application. This manual gives information about the so ftw are which applie s to y our machine only .

Throughout this manual the term '795x' is used to refe r to al l members of the 795x family (7950 and 7951).

Chapter 1 About this manual

1.2 Who should use this manual

This manual is for anyone who installs, uses, services or repairs the 795x.

1.3 Software version covered by this manual

The software version dealt with in this manual is given on the title page. Chapter 3 tells you about the software is installed in your instrument.

Page 1.1

Chapter 1 About this manual

Page 1.2

2. Getting started

2.1 What this chapter tells you

If you are new to the Micro Motion® 7951 Signal Converter, the worked examples in this chapter can help you to become familiar with the installation and configuration procedures. The examples are:

• Example 1: 7951 with a 7810/11/12 (See page 2.2)

• Example 2: 7951 with a 3098 Gas Specific Gravity (See page 2.6)

• Example 3: 7951 with a mA-type temperature transmitter (See page 2.9)

• Example 4: 7951 with a mA-type pressure transmitter (See page 2.12)

• Example 5: 7951 with a RTD-type temperature transmitter (See page 2.14)

Work through whichever one is most like your installation.

2.2 What the examples show you

Chapter 2 Getting started

Each example shows you how to:

• wire up a simple system

• set the DIP switches inside the 7951

• find the menu from which you start configuration

• clear the memory of details of any existing configuration (OPTIONAL)

• select the appropriate wizard to configure the simple system

• work through the wizard and button in information

• view the results of your configuration

The examples do not give full instructions on how to fit and configure installations. They are intended purely to give you confidence to install and configure your own equipment. Chapter 5 tells you how to make permanent installations.

2.3 If you need help...

If you get into difficulties... If you get into difficulties when using the wizards, you can abandon the configuration and start again as follows:

1. From the menu, keep selecting NO (usually by pressing the c-button) or, if that option is not available:

2. Press ENTER until you can start selecting NO.

3. Carry on with (1) and (2) until you return to the wizards menu where you started.

4. Start the worked example again. The configuration you abandoned is clear ed from the instrument’s

memory when you begin again.

If you don’t know where the buttons are...

Chapter 6 shows how to find all the buttons referred to in the worked examples.

Page 2.1

Chapter 2 Getting started

2.4 Example 1: 7951 with a 7812 gas density meter

About this example

This NON-HAZARDOUS (SAFE) AREA ONLY INSTALLATION† example shows you how to connect either a 7812 gas density meter to the 7951, and then uses the “Density 1” wizard to configure the system.

In this example, the “Density 1” wizard is used to configure a connection as follows:

• A single densitometer is connected to Density Input 1.

Work through the example by following the instructions below. If you are not sure where the buttons are, refer to Chapter 6.

Connect the meter

1. Wire the meter to the 7951, as in:

Figure 2.1 for a 7812 gas density meter. Note: Refer to meter documentation for other wiring arrangements.

2. Earth the 7951 to a suitable earth point.

EMC Notes:

To meet the EC Directive for EMC (Electromagnetic Compatibility), it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cove r all cores.

The instrumentation cables should have individual screen(s), foil or braid over each twisted pair and an overall screen to cover all cores. Where permissible, and depending on the earthing scheme employed at the installation, the overall screen should be connected to the earthed metal work at both ends (360° bonding where possible). This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen(s) or Instrumentation or Zener barrier grounds.

The individual inner screen(s) should be connected at one end only, normally the controller (e.g. Flow Computer) end. These should be connected to the Instrumentation or Zener barrier ground.

Use suitable cables that meet BS5308 multi-pair Instrumentation Types 1 or 2.

7812

7951

Klippon D-type

SIG A

2 3

SIG B

+24V Power

Signal +

Power

Signal -

PL5/9 PL5/1 PL5/10 PL5/2

SK6/22 SK6/14 SK6/24 SK6/15

Figure 2.1: Safe area wiring for a 7812 (3-wire arrangement)

Turn on the 3. Turn on the power to the system. The system goes through a Power On Self Test

†

Hazardous area considerations: Refer to meter documentation for details of Intrinsically Safe Barrier/Isolator requirements.

Page 2.2

Chapter 2 Getting started

power (POST) routine which takes less than 30 seconds. When it is finished, ignore any

flashing alarm lights which may appear.

Go to the wizards menu

Clear existing configuration

(This is optional)

Select the wizard 12. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through

Start of wizard 14. Press the d-button to answer YES to “Edit Gas density A?” Enter

densitometer calibration factors

4. Press the MENU button to go to Page 1 of the Main Menu (if you aren’t there already).

5. Press the DOWN-ARROW button twice (to go to page 3 of the menu).

6. Press the b-button to select “Configure”.

7. Press the a-button twice to go to the wizards menu.

8. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the option list until “Initialise” is shown.

9. Press the b-button to select “Initialise”.

10. Press the d-button to confirm that you want to lose the current configuration.

11. Wait a few seconds until “initialise” on line 2 of the display changes back to

“Choose option”.

the option list until “Density 1” is shown.

13. Press the b-button to select “Density 1”.

15. Press the b-button, and then input the factor K0 from the Calibration Certificate that was shipped with the meter.

16. Press the b-button then ENTER to confirm the K0 value.

17. Enter values for factors K1 and K2 in the same way as for K0.

Note: Figure 2.3 on page 2.4 shows where to find the K0, K1 and K2 factors on a calibration certificate. Always shipped with the connected meter.

use values from the calibration certificate that was

Enter temperature correction factors

Skip over the next few questions

View how you have configured Line density

18. Press b-button to start the correction selection process.

19. Use the UP-ARROW button to scroll through the options until “Temp” appears on line 2.

20. Press the b-button and then the ENTER button to confirm that temperature correction is to be applied.

21. Enter factors K18 and K19 in the same way as for K0, K1 and K2.

22. Press the ENTER button to skip past the “Density offset” prompt

23. Keep pressing the c-button (to answer NO to all questions) until the wizard is exited.

24. Press the MENU button.

25. Press the a-button twice. The display looks similar to that shown in Figure 2.2, although values and titles shown may vary.

Page 2.3

Chapter 2 Getting started

Figure 2.2: Prime Line density display

C A L I B R A T I O N C E R T I F I C A T E

7812xx GAS DENSITY METER

PRESSURE TESTED TO 375 BAR

DENSITY CALIBRATION FOR NITRIGEN AT 20 DEG C

Based on Pressure-Temperature-Density Data in IUPAC Tables

DENSITY

[ kg/m2]

0 1 2

5 10 15 20 30 40 50 60 70 80 90

TEMPERATURE COEFFICIENT DATA

Dt = DI ( 1 + K18 ( t - 20 ) ) + K19 ( t - 20 ) K18 = -1.36E-05

PERIODIC TIME

[us]

502.190

504.507

506.697

513.168

523.735

534.078

544.202

563.880

582.895

601.307

619.124

636.442

653.310

669.758

G = ------------------------- -- -- --

USER GAS OFFSET DATA

Nitrogen/Methane Gas Mixture Over Density Range 10 to 60 KG/M3

( K3 ( G ) ) K3 = 354

DA = Dt ( 1 + ----------- ( 0.00236 - ----------- ) ) K4 = 57.4

( (Dt+K4) ( t+273 ) )

where

= Periodic Time (uS)

= Actual Density (KG/M3)

= Temperature (DEG. C)

= Indicated Density (KG/M3)

= Temp. Corrected Density (KG/M3)

Calibration Date:

DENSITY = K0 +K1.T + K2.T**2 K0 = -1.104252E+02

K1 = -1.882012E-02 K2 = 4.749797E+04

K19 = 8.44E-04

Gas Specific Gravity

Ratio of Specific Heats

FINAL TEST &

INSPECTION

Serial No:

Cylinder No:

Amplifier No:

123456

123456 123456

14JUL97

Page 2.4

Ref No: GD04/V1.5

Figure 2.3: Circled areas on an example calibration certificate showing where to find

values for K0, K1, K2, K18 and K19.

DATE14JUL97

View the Multiview display

Chapter 2 Getting started

26. Press the MULTI-VIEW DISPLAY button. The display looks similar to that in Figure

2.4, although values shown may vary.

27. Pressing the DOWN-ARROW button results in the message: “Invalid Multiview Page”

This appears because it is possible to have more than one Multiview page and it is simply saying that no more pages exist. In this case, only four items are defined and they fit on one page.

Pressing the UP-ARROW button makes the previous page to re-appear. Note that it may be necessary to press the UP-ARROW button several times before the

first Multi-view page appears.

From Multi-view key

End of Worked Example 1

b c d

Density 0.000

Invalid Multiview Page

Figure 2.4: Multi-view display

Page 2.5

Chapter 2 Getting started

2.5 Example 2: 7951 with a 3098 Gas Specific Gravity Meter

About this example

This example shows you how to connect a 3098 to the 7951 and then use the “SG 1” wizard to configure the system.

In this example, the “SG 1” wizard is used to configure a connection as follows:

• A single 3098 is connected to Density Input 3.

Work through the example by following the instructions below. If you are not sure where the buttons are, refer to Chapter 6.

Connect the meter

1. Wire the meter to the 7951, as in :

Figure 2.6 for a NON-HAZARDOUS (SAFE) AREA OR Figure 2.7 for a HAZARDOUS AREA

2. Earth the 7951 to a suitable earth point.

EMC Notes:

The individual inner screen(s) should be connected at one end only, normally the controller (e.g. Flow Computer) end. These should be connected to the Instrumentation or Zener barrier ground.

Use suitable cables that meet BS5308 multi-pair Instrumentation Types 1 or 2.

Page 2.6

3098 7951

Klippon D-type

ohms

3 2

Sig

Neg

(24V) Powe

Signal +

Signal -

(0V) Power -

PL5/9 PL5/5

PL5/6 PL5/10

SK 6 / 22 SK 6 / 18

SK 6 / 19

SK 6 / 24

Figure 2.5: Non-hazardous (Safe) area wiring for a 3098

3098

Barrier as defined in the

latest

specification

3098

Klippon

Chapter 2 Getting started

7951

D-type

1 2

Sig Neg

3 4

Intrinsically Safe Earth

1 2

(24v) Powe

Signal +

Signal -

(0v) Powe

PL5/9 PL5/5

PL5/6 PL5/10

SK 6 /22 SK 6 /18 SK 6 /19

SK 6 /24

Figure 2.6: Hazardous area wiring for a 3098

Turn on the power

3. Turn on the power to the system. The system goes through a Power On Self Test (POST) routine which takes less than 30 seconds. When it is finished, ignore any flashing alarm lights which may appear.

Go to the wizards menu

4. Press the MENU button to go to Page 1 of the Main Menu (if you aren’t there already).

5. Press the DOWN-ARROW button twice (to go to page 3 of the menu).

6. Press the b-button to select “Configure”.

7. Press the a-button twice to go to the wizards menu.

Clear existing configuration

(This is optional)

8. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

option list until “Initialise” is shown.

9. Press the b-button to select “Initialise”.

10. Press the d-button to confirm that you want to lose the current configuration.

11. Wait a few seconds until “initialise” on line 2 of the display changes back to

“Choose option”.

Select the wizard

12. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through

the option list until “SG 1” is shown.

13. Press the b-button to select “SG 1”.

Start of wizard 14. Press the d-button to answer YES to the question “Edit Gravitometer A?”. Enter

gravitometer calibration factors

15. Press the b-button, then input the factor K2 from the Calibration Certificate that was shipped with the meter.

16. Press the b-button then ENTER to confirm the K2 value.

17. Press the b-button, then input the factor K0 from the Calibration Certificate that was shipped with the meter.

18. Press the b-button then ENTER to confirm the K0 value.

Skip over other questions

View how you have configured Specific gravity

19. Press the c-button several times (to answer NO to all questions) until the wizard is exited.

20. Press the MENU button.

21. Press the c-button and then press the a-button. The display looks similar to that shown in Figure 2.7 although values shown may vary.

Page 2.7

Chapter 2 Getting started

Figure 2.7: Prime Specific Gravity display

View the Multiview

22. Press the MULTI-VIEW DISPLAY button. The display looks similar to that in Figure 2.8, although values and titles shown may vary.

display

From Multi-view key

b c d

Density 0.000

Invalid Multiview Page

Figure 2.8: Multi-View display

End of Worked Example 2

Page 2.8

Chapter 2 Getting started

2.6 Example 3: 7951 with a mA-type temperature transmitter

About this example

This example shows you how to connect a mA-type temperature transmitter to the 7951, and then use the “Temperature” wizard to configure the system.

In this example, the “Temperature” wizard is used to configure connections as follows:

• A single temperature transmitter is connected to Analogue Input 3.

Now work through the example by following the instructions below. If you are not sure where the buttons are, refer to the diagram at the start of this chapter.

Connect the meter

Set DIP switch 3. Ensure that the DIP-switch, inside the 7951, is set as shown below.

1. Wire the temperature transmitter to the 7951, as in Figure 2.9

2. Earth the 7951 to a suitable earth point.

EMC Notes:

The individual inner screen(s) should be connected at one end only, normally the controller (e.g. Flow Computer) end. These should be connected to the Instrumentation or Zener barrier ground.

Use suitable cables that meet BS5308 multi-pair Instrumentation Types 1 or 2.

Loop-powered

4-20mA

temperature

transmitter

7951

Klippon D-type

Power + Signal +

Signal -

Power -

4-20mA

PL9/5 PL8/2

PL8/3 PL9/8

SK8/24 SK8/2

SK8/3

SK8/25

PRT

Notes:

1. Specified 7951 pins are for Analogue Input 3.

2. DIP-switch position 3 must be set to 4-20mA.

Figure 2.9: DIP-switch and safe area wiring for a m A-type temperature transmitter

Page 2.9

Chapter 2 Getting started

Turn on the power

4. Turn on the power to the system. The system goes through a Power On Self Test (POST)

routine which takes less than 30 seconds. When it is finished, ignore any flashing al arm lights which may appear.

Go to the wizards menu

5. Press the MENU button to go to Page 1 of the Main Menu (if you aren’t there already).

6. Press the DOWN-ARROW button twice to go to Page 3 of the menu.

7. Press the b-button to select “Configure”.

8. Press the a-button twice to go to the wizards menu.

Clear existing configuration

(This is optional)

9. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

option list until “Initialise” is shown.

10. Press the b-button to select “Initialise”.

11. Press the d-button to confirm that you want to lose the current configuration.

12. Wait a few seconds until “initialise” on line 2 of the display changes back to “Choose option”.

Select the wizard

13. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

option list until “Temperature” is shown.

14. Press the b-button to select “Temperature”.

Start of wizard 15. Press the d-button to answer YES to the question “Edit Line Temperature?”. Choose the

Analogue Input

16. Press the b-button

17. Press the UP-ARROW button until “Analogue input 3” appears.

18. Press the b-button and then the ENTER button to confirm selection of

“Analogue input 3”.

Select the type

19. Press the ENTER button to keep the default selection of a 4-20mA type input.

of Analogue Input

Set Analogue 0% and 100%

20. Press the b-button.

21. Type in a suitable maximum temperature value and then press the ENTER button.

range

22. Press the ENTER button to move on to the next prompt.

23. Press the b-button.

24. Type in a suitable minimum temperature value and then press the ENTER button. 25 Press the ENTER button to move on to the next prompt.

Make the Analogue Input “live”

Skip over the next few

26. Press the d-button.

27. Press the UP-ARROW button so that “Set” changed “Live”.

28. Press the ENTER button once.

29. Press the c-button several times to answer NO to all questions until the wizard is exited.

questions View how you

have configured Line temperature

30. Press the MENU button.

31. Press the d-button and then press the a-button. The display looks similar to that shown in Figure 2.10 although values shown may vary.

Page 2.10

Chapter 2 Getting started

Figure 2.10: Line temperature data display

End of Worked Example 3

Page 2.11

Chapter 2 Getting started

2.7 Example 4: 7951 with a mA-type pressure transmitter

About this example

This example shows you how to connect a mA-type pressure transmitter to the 7951, and then use the “Pressure” wizard to configure the system.

In this example, the “Pressure” wizard is used to configure a connection as follows:

• A single pressure transmitter is connected to Analogue Input 3.

Work through the example by following the instructions below. If you are not sure where the buttons are, refer to Chapter 6.

Connect the meter

1. Wire the transmitter to the 7951, as in Figure 2.11.

2. Earth the 7951 to a suitable earth point.

EMC Notes:

The individual inner screen(s) should be connected at one end only, normally the controller (e.g. Flow Computer) end. These should be connected to the Instrumentation or Zener barrier ground.

Use suitable cables that meet BS5308 multi-pair Instrumentation Types 1 or 2.

Set DIP switch 3. Ensure that the DIP-switch, inside the 7951, is set as shown in Figure 2.11 .

Loop-powered

7951

4-20mA pressure

transmitter

Power + Signal +

Signal -

Power -

Klippon D-type

PL9/5 PL8/2

PL8/3 PL9/8

4-20mA

SK8/24 SK8/2

SK8/3

SK8/25

PRT

Notes:

1. Specified 7951 pins are for Analogue Input 3.

2. DIP-switch position 3 must be set to 4-20mA.

Figure 2.11: DIP-switch and safe area wiring for a m A-type pressure transmitter

Page 2.12

Chapter 2 Getting started

Turn on the power

4. Turn on the power to the system. The system goes through a Power On Self Test (POST)

routine which takes less than 30 seconds. When it is finished, ignore any flashing al arm lights which may appear.

Go to the wizards menu

Clear existing configuration

(This is optional)

Select the wizard 13. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

Start of wizard 15. Press the d-button to answer YES to the question “Edit Line Pressure?”. Choose the

Analogue Input

Set Analogue 0% and 100% range

23. Type in a suitable minimum pressure value and then press the ENTER button.

5. Press the MENU button to go to Page 1 of the Main Menu (if you aren’t there already).

6. Press the DOWN-ARROW button twice to go to Page 3 of the menu.

7. Press the b-button to select “Configure”.

8. Press the a-button twice to go to the wizards menu.

9. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

option list until “Initialise” is shown.

10. Press the b-button to select “Initialise”.

11. Press the d-button to confirm that you want to lose the current configuration.

12. Wait a few seconds until “initialise” on line 2 of the display changes back to

“Choose option”.

option list until “Pressure” is shown.

14. Press the b-button to select “Pressure”.

16. Press the b-button

17. Press the UP-ARROW button until “mA input 3” appears.

18. Press the b-button and then the ENTER button to confirm selection of “mA input 3”.

19. Press the b-button.

20. Type in a suitable maximum pressure value and then press the ENTER button.

21. Press the ENTER button to move on to the next prompt

22. Press the b-button

24 Press the ENTER button to move on to the next prompt

Select the type of Analog Input

Make the Analogue Input “live”

Skip over other questions

View how you have configured Line pressure

25. Press the ENTER button to keep the default selection of a 4-20mA type input.

26. Press the d-button

27. Press the UP-ARROW button so that “Set” changed “Live”

28. Press the ENTER button twice

29. Press the c-button several times to answer NO to all questions until the wizard is exited

30. Press the MENU button.

31. Press the DOWN-ARROW button.

32. Press the a-button twice. The display looks similar to that shown in Figure 2.12 although values shown may vary.

Figure 2.12: Line pressure data display

End of Worked Example 4

Page 2.13

Chapter 2 Getting started

2.8 Example 5: 7951 with a RTD-type temperature transmitter

About this example

This example shows you how to connect a PT100 transmitter to the 7951, and then use the “Temperature” wizard to configure the system.

In this example, the “Temperature” wizard is used to configure a connection as follows:

• A single PT100 transmitter is connected to Analogue Input 1.

Work through the example by following the instructions below. If you are not sure where the buttons are, refer to Chapter 6.

Connect the meter

1. Wire the transmitter to the 7951, as in Figure 2.13.

2. Earth the 7951 to a suitable earth point.

EMC Notes:

The individual inner screen(s) should be connected at one end only, normally the controller (e.g. Flow Computer) end. These should be connected to the Instrumentation or Zener barrier ground.

Use suitable cables that meet BS5308 multi-pair Instrumentation Types 1 or 2.

Page 2.14

Set DIP switch 3. Set DIP-switch position 1 to “RTD” (for Analogue input 1).

PT100 on Analogue

Input 1

7951

Klippon D-type

PRT

Power +

Signal +

Signal -

Power -

PL7/1 PL7/2

PL7/3 PL7/4

4-20mA

SK7/14 SK7/15

SK7/16

SK7/17

Notes:

1. Specified 7951 pins are for Analogue Input 1.

2. DIP-switch position 1 must be set to PRT.

Figure 2.13: DIP switch and safe area wiring for a RTD-type temperature transmitter

PRT

Turn on the power

Chapter 2 Getting started

4. Turn on the power to the system. The system goes through a Power On Self Test

(POST) routine which takes less than 30 seconds. When it is finished, ignore any flashing alarm lights which may appear.

Go to the wizards menu

Clear existing configuration

(This is optional)

Select the wizard 13. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through

Start of wizard 15. Press the d-button to answer YES to the question “Edit Line Temperature?”. Choose the

Analogue Input

Choose the type of Analogue Input

5. Press the MENU button to go to Page 1 of the Main Menu (if you aren’t there already).

6. Press the DOWN-ARROW button twice to go to Page 3 of the menu.

7. Press the b-button to select “Configure”.

8. Press the a-button twice to go to the wizards menu.

9. Press the b-button then the UP-ARROW or DOWN-ARROW button to scroll through the

option list until “Initialise” is shown.

10. Press the b-button to select “Initialise”.

11. Press the d-button to confirm that you want to lose the current configuration.

12. Wait a few seconds until “initialise” on line 2 of the display changes back to

“Choose option”.

the option list until “Temperature” is shown.

14. Press the b-button to select “Temperature”.

16. Press the b-button.

17. Press the UP-ARROW button until “Analogue input 1” appears.

18. Press the b-button and then the ENTER button to confirm selection of “Analogue input 1”.

19. Press the b-button.

20. Press the UP-ARROW button until “PT100 input” appears on line 2.

21. Press the ENTER button twice to select this RTD-type input.

Make the Analogue Input Channel “live”

Skip over other questions

View how you have configured Line temperature

22. Press the d-button.

23. Press the UP-ARROW button so that “Set” has changed to “Live”.

24. Press the ENTER button twice.

25. Press the c-button several times (to answer NO to all further questions) until the wizard is exited.

26. Press the MENU button.

27. Press the d-button and then press the a-button. The display looks similar to that shown in Figure 2.14 although values shown may vary.

Figure 2.14: Line temperature display

End of Worked Example 5

Page 2.15

Chapter 2 Getting started

Page 2.16

3. About the Micro Motion

3.1 Background

The Micro Motion® 7951 is designed to meet the demand for a reliable, versatile, user-friendly and cost-effective instrument for liquid and gas metering. It has a Motorola 68332 32-bit microprocessor and surface-mounted circuit board components so that it is powerful, reliable and compact.

Features of the 7951 include:

• Simple access to information.

• Comprehensive interrogation facilities.

• Alarm and alarm history facilities.

• A menu-driven, user-friendly interface.

• NEMA12, IP52 panel mounted case.

• Dc powered.

• Three serial ports (using RS232 or RS485) for

Modbus communications and printing.

Chapter 3 About the Micro Motion® 7951

7951

These facilities are described in more detail in the rest of this chapter.

3.2 What the 7951 Dual Channel Gas Signal Converter does

The 7951 Gas Signal Converter is primarily used to convert signal s from one fo rma t to another. There is a need for this conversion when a system is unable to accept a raw signal from a transducer or, perhaps, some intermediate signal processing is required.

A common conversion is where a frequency input from a 7812 gas density transducer can be acce pted by a 795x and then transmitted (by the same 795x) through an analogue output as a 4-20mA signal.

In this application, the 7951 can calculate:

• Line density

• Specific gravity

• Base density

• Energy (Cv/m) (from AGA-5 method or mA-type input)

Note: Dual-channel measurements are available for Items marked w ith a

It can also ob tain:

• Line temperature.

• Densitometer temperature.

• Density pressure.

• Atmospheric pressure.

• Percentage of CO

• Percentage of N

• Compressibility (from S-GERG, NX19, NX19mod or NX19 3h)

• Special equations 1 and 2.

√

(from Transducer, PTZ method or mA-type input)

√

(from Transducer, mA-type input or Base density)

√

(from Specific gravity method, PTZ method or mA-type input)

√

(from a mA-type input)

Page 3.1

Chapter 3 About the Micro Motion® 7951

3.3 Physical description of the 7951

The main body of the 7951 is a one-piece aluminium extrusion which provides the best possible EMC protection. The keyboard and display is attached to the front of the instrument and all electrical and communications connectors are mounted on the Rear Panel. The 7951 is available with two types of rear Panel - one with Klippon connectors, the other with D-type connectors.

The case contains four circuit boards. The Processor Board and the Power Supply Board are mounted horizontally. These are connected by plugs and sockets to the Mother Board which is mounted vertically at the back of the case. The Connector Board is parallel to the Mother Board to which it is joined.

The Keyboard and Display are wired to the Processor Board. The Connector Board holds the connectors to which external devices are linked.

Processor

Power Supply Board

Board

Two types of Rear Panel

Either... Klippon connectors

SK1

SK2

SK3

PL3 PL4 PL5 PL6 PL7 PL8 PL9

PL2

PL1

D-type connectors

Or...

SK1

Connector Board

Mother Board

SK2

SK3

PL1

SK4 SK5 SK6 SK7 SK8

Keyboard and display

Figure 3.1: The 7951 and its major assemblies

3.4 Communications

The 7951 can operate as a MODBUS slave. It can:

• Download a configuration from a PC, DCS, etc.

• Upload a configuration.

• Monitor random locations in the 7951.

• Interrogate the alarm and data logger buffers.

• Manipulate the alarm and data logger buffers.

• Set random locations with new data.

• Instigate printed reports.

Page 3.2

3.5 Typical installations

The diagram below illustrates a typical installation utilising the 7951.

Part of pipeline

Chapter 3 About the Micro Motion® 7951

4-wire PRT

Transducers and transmitters

Static pressure transducer

Density transmitter Temperature element (PRT)

7951

Alarm

Frequency

Analogue outputs

4-20mA

Printer

MODBUS communications to and from host com

uter

Figure 3.2: Typical installation for A Gas Signal Converter system

3.6 Checking your software version

The 7951 is driven by pre-loaded software which differs according to the application for which the instrument is to be used. To check hardware configuration, see Ordering Information in Appendix C.

PREFIX:

HARDWARE PLATFORM

50 7950 51 7951

DIGIT 1:

METERED PRODUCT

1 GAS 2 LIQUID 3 BOTH 4 OTHER

PREFIX DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4

SOFTWARE VERSION NUMBER

Figure 3.3: Software version number

DIGIT 2:

FLOW METER

0 NONE 1 OR IF ICE 2 TURBINE/PD 3 VENTURI 4 MASS 5 MULTI

DIGIT 3:

STREAMS/ CHANNELS

1 SINGLE 2 DUAL 3 TRIPLE 4 QUAD 5 1, 2, 3 or 4

DIGIT 4:

SPECIAL

0 – 9

Page 3.3

Chapter 3 About the Micro Motion® 7951

For example, for a 7951 Dual-Channel Gas Signal Converter, the software version number is 511020. You can find the software version number in two ways:

1. It is printed on a label at the rear panel of the 7951.

2. It is written into the menu structure – see Chapter 12.

Page 3.4

4. What you can connect to a 7951

The information in this chapter has been moved to Appendix C.

Chapter 4 What you can connect to a 7951

Page 4.1

Chapter 4 What you can connect to a 7951

Page 4.2

5. Installing the system

5.1 What this chapter tells you

This chapter gives full instructions for installing the 7951.

It does not go into detail about how to install any peri phe ra l devices (such as transducers, computers or printers) which are connected to the 7951. For this information you must re fer to the do cumen tation sup plied w ith th ese items.

5.2 Hazardous and non-hazardous environments

Caution:

Always refer to documentation supplied by the manufacturer for details of installing their equipment in a hazardous area. The 7951 is neither intrinsically safe nor explosion-proof. and can therefore only be used in a designated non-hazardous (safe) area.

If all or part of an installation is in an area where there is the risk of fire or explosion (which is almost always the case when gases are involved), then safety barriers or galvanic isolators usually have to be wired into the circuit. However, some instruments are explosion-proof and barriers are not, therefore, needed.

Chapter 5 Installing the system

5.3 Installation procedure

Briefly, the procedure is:

Step 1: Draw up a wiring schedule. Step 2: Unpack the 7951. Step 3: Set the DIP switches. Step 4: Fit the 7951. Step 5: Make all external connections. Step 6: Earth the installation. Step 7: Connect power supply.

The steps in the procedure are explained in the following sections.

5.4 Step 1: Drawing up a wiring schedule

Before you make any connections, you must draw up a wiring schedule to help you identify wiring colours and make sure that you do not connect more items of any given type than are allowed. (If you are in doubt, check the specification in Appendix C.)

A blank copy of a wiring schedule is given in Appendix B.

Page 5.1

Chapter 5 Installing the system

5.5 Step 2: Unpacking the instrument

Remove the instrument from its packing and examine it to see if any items are loose or if it has been damaged in transit. Check that all items on the shipping list are present. If any items are missing or if the equipment is damaged, contact your supplier immediately for further advice.

Note: If you have ordered an option card, this is already installed in the 7951.

Table 5.1: What should be supplied with the 7951 (Klippon)

Item Quantity

Mounting Clamp Assembly 1 Captive screws 2 Mounting strap 1 Location moulding 1 Socket identification label 1 9-way D-type plugs 3 9-way connector hoods 3 4-way socket 1 10-way sockets 8 2 Amp glass fuse (this is a spare) 1

Table 4.2: What should be supplied with the 7951 (D-type)

Item Quantity

Mounting Clamp Assembly 1 Captive screws 2 Mounting strap 1 Location moulding 1 9-way D-type plugs 3 9-way D-type connector hoods 3 25-way D-type plugs 5 25-way D-type connector hoods 5 4-way socket 1 2 Amp ceramic fuse (this is a spare) 1

Page 5.2

5.6 Step 3: Setting DIP-switches

Some types of connection may require DIP-switches to be set.

5.6.1 Analogue Input DP-switches

The 7951 has two blocks of DIP-switches on the Processor Board, as shown in Figure 5.1:

• SW1 switches

– select whether each input is 4-20 mA or PRT.

Chapter 5 Installing the system

• SW2 switches

– not used in the current version of 7951.

The setting of each switch in the SW2 block must be the same as the corresponding pair of switches in the SW1 block. The 7951 may not work correctly otherwise.

The 7951 is supplied with the DIP-switches in these default settings:

• Input 1 PRT

• Inputs 2-4: 4-20mA

SW1

4-20mA

C D

SW2

PRT

3 4

Part of the 7951 Processor Board

Figure 5.1: DIP-switches on the Processor Board

If you want to change the Analog Input switch settings, you must also configure the inputs. This is explained in chapter 11. After the configuration has been completed, the 7951 should be switched into the 'secure' mode to prevent unauthorised or accidental tampering with the instrument's configuration.

Note:

• The 7951 is always shipped from the factory with the security lock on the front panel set to the ‘non-secure’ mode.

5.6.2 Turbine Voltage Selection switches

The Turbine Voltage Selection switch is a DIP switch on the PSU Board, which is accessible through removal of parts (see Chapter 14). Choose between 8 volts dc or 16 volts dc for all flow meters powered by the 7951. The 7951 is shipped with the switch set for 8 volts dc.

For flow meter connection details, see chapter 2.

Page 5.3

Chapter 5 Installing the system

5.7 Step 4: Fitting the 7951

Caution:

You must not fit the 7951 where it may be subjected to extreme conditions or be liable to damage. For further information about the environmen tal co nditi ons with in which it can op era te, see Append ix C.

1. Firstly, referring to Figure 5.2, cut out an aperture in the front panel for each instrument which is to be mounted on it.

29±1mm

96±1mm

Aperture for the

instrument

Aperture for the

instrument

192±1mm

Aperture for the

instrument

Aperture for the

instrument

17.5mm

17±1mm

14.5mm

Figure 5.2: Minimum dimensions for a panel with apertures to fit four 7951’s

2. Each instrument is mounted in a clamp which is fixed to the rear of the front panel, as shown in the two

diagrams that follow.

The 7951 unit

101mm

278.7mm

Location

Moulding

3mm

Panel with

aperture

Mounting

Clamp

Figure 5.3: Before assembly

7.2mm

3mm

Captive

Clamp

Screws (2)

113mm

Mounting

Clamp

Rear Panel

of 7951

Page 5.4

12.5mm

256mm

10mm

Note: Sufficient clearance is required for plugs and cables at the rear of the 7951

221mm

Figure 5.4: After assembly

Chapter 5 Installing the system

You can mount the clamp so that it is fixed permanently or can be removed later, if required. If you want the clamp to be fixed permanently, carry out Steps 3 - 8. If you want to be able to remove the clamp, carry out Steps 9 - 12.

If the clamp is to be fixed permanently:

1. Make sure that the face of the front panel is in good condition and has no loose or flaking paint. Use a

suitable de-greasing agent to clean the face of the panel.

2. Insert the location moulding through the aperture in the front panel.

3. Peel the protective strip off the adhesive tape on the face of the mounting clamp. Then, working from the

back of the front panel, carefully position the clamp over the location moulding. The clamp and pan el bond on contact.

4. Press firmly on the area where the clamp is bonded to the front panel to ensure that they are bonded firmly. Remove the Location Moulding and discard it.

5. Slide the instrument through the front panel. Tighten the two captive screws to secure it into the clamp.

6. Finally, attach all connectors to the back panel.

Note that, if you install more than one instrument, it helps to support them if you use a Mounting Strap to link each clamp to the next one, as shown in Figure 4.5:

Back of instrument

Mounting clamp Mounting clamp

Inside of front panel

Mounting stra

Back of instrument

Figure 4.5: Mounting arrangements for more than one instrument

If the clamp is to be removable:

7. Insert the location moulding through the aperture in the front panel.

8. Working from the back of the front panel, carefully position the clamp over the location moulding. Remove the

Location Moulding and discard it.

9. Slide the instrument through the front panel. Tighten the two captive screws to secure it into the clamp.

Note that, if you install more than one instrument, it helps to support them if you use a Mounting Strap to link each clamp to the next one, as shown in the diagram.

Page 5.5

Chapter 5 Installing the system

5.8 Step 5: Making the external connections

1. Refer to the documentation supplied with the external equipment to see if you have to carry out any special

procedures when connecting them to the 7951. Take special notice of any information about safety requirements in hazardous areas, and complying with EMC regulations.

2. For each D-type connector, pass the connector hood over the cable and wire up the connector. Secure the hood and connector body together then connect the earth wire to the hood. Stick an identifying label on to the connector hood.

3. For each Klippon connector, wire up the connector then stick an identifying label on it.

4. Check the wiring thoroughly against the schedule and wiring diagram.

5. Attach all connectors to the Rear Panel.

Refer to Chapter 2 and Appendix C for examples of field transmitter connections and a full list of the 7951’s pin identities.

5.9 Step 6: Earthing the instrument

Caution: Incorrect earthing can cause many problems, so you must earth the chassis and the electronics correctly. The way in which you do this depends almost entirely on the type of installation you have and the conditions under which it operates. Therefore, because these instructions cannot cover every possible situation, the manufacturers recommend that earthing procedures should only be carried out by personnel who are skilled in such work.

The chassis of the 7951 must be earthed in all cases; both for safety reasons and to ensure that the installation complies with EMC regulations. Do this by connecting an earth lead from the stud on the rear panel (Figure 4.6) to a local safety earth such as a cabinet earth or some other suitable metal structure. If there is more than one 7951, see Figure 4.7 for correct and incorrect methods.

In addition to earthing the chassis, you may have to make extra earth connections in some cases, depending on the installation requirements. Details of internal earthing arrangements are in Appendix C.

Page 5.6

Nut

Earth lead

Figure 4.6: The 7951’s Earth Stud

Crinkle washers

Plain washers

Thumb nut

Chapter 5 Installing the system

7951 7951

79517951

7951 7951

79517951

7951

SK3

PL1

(1) Earth stud on 7951 rear panel (D-type and Klippon).

(2) Cabinet earth or other suitable metal structure.

Figure 4.7: Multiple 7951 chassis earthing (through studs and earth leads)

Page 5.7

Chapter 5 Installing the system

5.10 Step 7: Connecting the power supply

Plug the dc power connector into plug PL1 and switch on the power. The instrument goes through the following Power-On-Self-Test (POST) routine:

• The display shows a sequence of characters or patterns to prove that all elements of the display are working. There is a pause of five seconds between each change of pattern.

• The program ROM is checked against a checksum. The display shows how the test is proceeding.

• Critical data are checked. The display shows the result of this check.

• The coefficients are checked. The display shows the result of this check.

• The battery-backed RAM is checked. The display indicates progress.

• Any saved programs are checked. The display shows the number of programs and their status. Note

that, for a new machine, there are no stored programs.

• If a battery is fitted, its condition is checked and reported.

Note that, when the power is switched on, the alarms may light up. You can ignore these for the moment, as alarms are explained later in this manual. You can now proceed to configure your 7951 (see Chapters 8-11).

If the POST fails to complete, switch off the power supply and check all connections and the DIP-switch settings. Then re-connect the power supply. If the POST still fails to complete, switch off again and contact your supplier.

Page 5.8

Chapter 6 The keyboard, display and indicators

6. The keyboard, display and indicators

6.1 What this chapter tells you

This chapter tells you:

• How the front panel is laid out.

• What the buttons and indicators do.

• What characters you can display.

6.2 The layout of the front panel

Figure 6.1 shows the layout of the keyboard. The diagrams at the end of this chapter give a visual sum mary of what each of the buttons do.

1. DOWN-ARROW 7. ENTER 13. PRINT MENU

2. UP-ARROW 8. INFORMATION MENU 14. STREAM/RUN SELECT

3. MULTI-VIEW DISPLAY 9. LIMIT ALARM LED 15. F1 (software specific function)

4. LEFT-ARROW 10. INPUT ALARM LED 16. SECURITY LED AND LOCK

5. RIGHT-ARROW 11. SYSTEM ALARM LED

6. BACK 12. MAIN MENU

Figure 6.1: The layout of the front panel

Page 6.1

Chapter 6 The keyboard, display and indicators

6.3 What the display shows

The display can show the following information:

• Numerical data in floating point, exponent or integer formats.

• Text descriptors.

• Units of measurement (if applicable).

• Status of parameters i.e. set, live, failed or fallback (if applicable).

• Alarm and event information.

• Current time and date.

• Identification number (location ID) of parameter.

• Stream (metering-run) identification number (if applicable).

6.4 How the buttons work

The buttons let you:

• Move around the menus.

• View data stored in the 795x – VIEW mode.

• Edit the data – EDIT mode.

Some buttons do different things according to where you are in the menu system. For example:

ENTER button This button does nothing until you get into EDIT mode. After you have

c button When you move through the menu structure this selects any menu

INFORMATION MENU button

PRINT MENU

button

edited the data of a parameter, pressing ENTER accepts the changes and puts the 795x back into VIEW mode.

choice shown against the button. However, when in VIEW mode, pressing

This button does nothing if you are in EDIT mode. At other times, it takes you to a special menu that provides information on alarms, events, flow status and 795x operating mode.

This button does nothing if you are in EDIT mode. At other times, it takes you to a special menu dealing with data archiving and printing of reports.

c lists the display units.

6.5 Using the buttons to move around the menus

A general tour of the menu system is provided in chapter 6. The buttons, which you can use to move around the menu system, are:

UP-ARROW Moves the display up to the previous page of the menu. If there is no

DOWN-ARROW Moves the display down to the next page of the menu. If there is no

previous page, this button does nothing.

next page, this button does nothing.

Page 6.2

a - d buttons Each of these buttons selects the menu choice next to it. If there is no

BACK Returns you to the previ ous step.

menu choice next to a button, that button does nothing.

Chapter 6 The keyboard, display and indicators

MAIN MENU Moves you straight to page 1 of the top-level menu.

INFORMATION MENU

PRINT MENU Takes you to a special menu dealing with data archiving and printing

MULTI-VIEW

F1 The use of this button is dependent on the functionality of the

Note: All other buttons have no effect when moving around the menus.

Takes you to a special menu providing information on alarms, events, flow status and 795x operating mode.

of reports. You can define one or more display pages, each showing up to four

items of data, lines of descriptive text, or both. Pressing MULTI- VIEW shows the first display page you have defined. Use the up/down arrow buttons to page up and page down.

application software. If this button is in use, it will be mentioned in later chapters.

6.6 Using the buttons to view stored data

When a software parameter screen is viewed, after selection from the menu, the display is in VIEW mode. Figure 6.2 shows a typical display when you view a software parameter screen. In VIEW mode, all information is

in a right justified format.

Figure 6.2: A typical software parameter screen (in VIEW mode)

What the display shows

Line 1: Shows the parameter description. (Some words are abbreviated.) Line 2: Shows the present value (or text for indirection type). Line 3: Shows the measurement units (if any). This line is blank if there are no units. Line 4: The right-hand side shows LIVE, SET, FB (FALLBACK) or FAIL to indicate the state of the

present value shown in Line 2, where appropriate. These indications mean: LIVE – The data shown is live data received from the transducer/transmitter connected to

the 795x or calculated by the 7858 rather than a set value.

SET – There is a fixed value for the data; this value does not change unless you enter a

new fixed value or make it live.

FB – A fallback or default value has been used to obtain the value for the data. FAIL – The live input has failed, most likely due to no transducer/transmitter being

connected or a calculation failed to complete due to incorrect configuration.

An alarm will be raised causing the Input Alarm LED to flash on the front panel. For

troubleshooting this alarm, see chapter 8.

Optionally, Line 4 may also show the parameter’s unique identifica tion number (location ID ), which is required w hen setting up certain features e.g. Multi-view. You can toggle this in formation on/off by the ‘a’ button.

Page 6.3

Chapter 6 The keyboard, display and indicators

In VIEW mode, the buttons that you can use are:

‘

a’ button On/off toggle for displaying the parameter’s uni que identification number

‘

b’ button Puts the 795x into EDIT mode so that you can edit the data on line 2. The

‘

c’ button Puts the 795x into EDIT mode so that you can select from a list of the units

‘

d’ button Puts the 795x into EDIT mode so that you can select a status (Set or Live).

(location ID). This is displayed to the left of the status indication on line 4.

data being edited is left justified whilst in EDIT mode. (See next section)

in which the data can be displayed. The units are left justified whilst in EDIT mode. (See next section)

The status is left justified whilst in EDIT mode. (See next section)

STREAM / RUN SELECT

BACK Returns you to the previous step.

MAIN MENU Takes you straight to page 1 of the top-level menu.

If there is more than one stream (metering-run) and there is a number on the far left of display line 4, this button will select another stream (meteringrun). The screen will be refreshed with attributes (value, units and status) for that stream (metering-run).

6.7 Using the buttons to edit information

You can:

• Edit text.

• Select an option from a multiple-choice list.

• Edit numerical information.

• Edit the date and time.

6.7.1 Text editing

Once in EDIT mode (see earlier), the buttons that you use to edit text are:

LEFT-ARROW Moves the cursor to the left, along the line of text you are editing.

Page 6.4

RIGHT-ARROW Moves the cursor to the right, along the line of text you are editing.

UP-ARROW This button changes the character at the current cursor position. It scrolls

DOWN-ARROW Changes the character at the current cursor position. It scrolls

0 - 9 buttons Each button enters a single digit.

b’ button If you are satisfied with the changes you have made, press b to accept the

‘

forwards through the alphanumeric character set. Stop when the

character you want is displayed.

backwards through the alphanumeric character set. Stop when the character you want is displayed.

changes and go back to VIEW mode. (The ENTER button also does this.)

Chapter 6 The keyboard, display and indicators

ENTER If you a re satisfied with the changes you have made, press ENTER to

CLEAR This clears a line of text.

BACK If you do not want to keep the changes you have made, press the BACK

PLUS / MINUS Toggles between lower and upper case letters.

accept the changes and go back to VIEW mode. (The ‘

button to abandon the changes and go back to VIEW mode.

6.7.2 Multiple-choice option selection

Once in EDIT mode (see earlier), the keys that you use to select from a multiple-choice list are:

UP-ARROW Scrolls up through the available options.

DOWN-ARROW Scrolls down through the available options.

‘

b’ button If editing the data (on display line 2) and you are satisfied with the

change you have made, press the ‘ back to VIEW mode. (Note: The ENTER button also does this.)

b’ to accept the change and go

b’ also does this.)

‘

c’ button If editing the measurement unit selection and you are satisfied with the

‘

d’ button If editing the status selection and you are satisfied with the change you

ENTER If you are satisfied with the change you have made, press the ENTER

CLEAR Restore the previous contents.

BACK If you do not want to keep the changes you have made, press the

change you have made, press the ‘ to VIEW mode. (Note: The ENTER button also does this.)

have made, press the ‘ mode. (Note: The ENTER button also does this.)

button to accept the change and go back to VIEW mode.

BACK button to abandon the changes and go back to VIEW mode.

d’ to accept the change and go back to VIEW

6.7.3 Numerical editing

Once in EDIT mode (see earlier), the buttons that you use to edit numerical data are:

LEFT-ARROW Erases the digit to the left of the cursor.

0 - 9 buttons Each button en ters a single digit.

c’ to accept the change and go back

PLUS / MINUS This changes the sign of the number. Pressing it will toggle between

Page 6.5

PLUS and MINUS signs.

Chapter 6 The keyboard, display and indicators

DOT Inserts a decimal point.

EXPONENT Use this button if you want to show numbers in exponent form.

‘

b’ button If you want to accept the changes you have made, press the ‘b’. The

ENTER If you want to accept the changes you have made, press the ENTER key.

CLEAR Clears the line you are currently editing.

BACK If you do not want to keep the changes you have made, press the BACK

Numerical entry

When you type in a number the first digit appears at the left of the display and each successive digit is then positioned to the right of the one just entered. A number being entered over-types any existing number.

Parameter identification number (Location ID) entry

These appear on the display in the same way as for numerical entry. However, when you accept the nu mber (by pressing ‘ encounter this type of ‘pointer’ (indirection) editing if configuring the Multi-view display (see chapter 11).

b’ or ENTER), the text descriptor of the parameter with that particular number appears on line 2. You will

795x will then revert to VIEW mode. (Note: ENTER also does this.)

The 795x will then revert to VIEW mode. (Note: ‘

button to abandon the changes and go back to VIEW mode.

b’ also does this.)

6.7.4 Date and time editing

The date and time are displayed in the format: dd-mm-yyyy hh:mm:ss. When you edit the date and time, the cursor moves to the right but skips the ‘:’ and ‘-’ characters.

LEFT-ARROW Moves the cursor to the left.

RIGHT-ARROW Moves the cursor to the right.

0 - 9 buttons Each button enters a single digit.

‘b’ button If you want to accept the changes you have made, press ‘b’. The

ENTER If you want to accept the changes you have made, press ENTER.

CLEAR Restore the previous contents.

BACK If you do not want to keep the changes you have made, press the

The new date and time is validated. An invalid date and time is causes the message “Bad date/time” to appear onscreen for a few seconds before the previous content is restored.

795x will then revert to VIEW mode. (Note: ENTER also does this.)

The 795x will then revert to VIEW mode. (Note: ‘

BACK button to abandon the changes and go back to VIEW mode.

b’ also does this.)

Page 6.6

6.8 The 795x character set

You can use any of the 96 characters shown below as part of your display.

Chapter 6 The keyboard, display and indicators

Figure 6.3: The 795x character set

6.9 LED indicators

Security Indicator This LED shows the present security level of the system.

• RED FLASHING – The instrument is at Calibration level.

• RED – Engi neer level: the instrument can be configured.

• ORANGE – Operator level: limits can be changed.

• GREEN – World level: no parameters can be changed.

Note: For more information about these, see Chapter 11.

Security Level LED.

Figure 6.4: Alarm Indicators

Alarm Indicators T hese are the Input, System and Limit alarms. For more information about these,

refer to Chapter 8: “Alarms and Events”.

Figure 6.5: Alarm Indicators

Page 6.7

System alarm LED. Input alarm LED. Limit alarm LED.

Chapter 6 The keyboard, display and indicators

6.10 Summary of button functions

The tables here provide a visual summary of the function for each button when in various modes.

Page 6.8

Table 6.1: Summary of what the buttons do (Part 1 of 2)

Chapter 6 The keyboard, display and indicators

Table 6.2: Summary of what the buttons do (Part 2 of 2)

Page 6.9

Chapter 6 The keyboard, display and indicators

Page 6.10

Chapter 7 The menu system

7. The menu system

7.1 What this chapter tells you

Before you can configure and operate the 795x, you should have some understanding of how the menu system works. The menus are simple and intuitive, so they should present no problems to the average user.

This chapter gives you a general tour, showing how to navigate the menu system to find application parameter screens and other types of screen such as for entering passwords.

Note:

The menus and parameters will differ between software versions, and can differ between releases of a software version. Chapter 12 features tables showing the routinely used (operator) parts of the menu system used in your software.

7.2 What the menu system does

The menu system lets you:

• Configure the 795x.

• Operate it.

• View data and settings stored in the 795x.

• Edit data stored in the 795x.

7.3 How the menu system works

When you power-on the 795x, the menu system appears immediatel y after the routine Power-On-Self-Test (POST) is completed. If it is the first power-on since the software was installed, a screen appears showing the software version number and the issue number e.g. 2550 Iss 1.00.00. if this is not the case, the screen will be the last visited menu location prior to powering off (or a power failure).

Press the MAIN MENU button once and page 1 of the top-level menu will appear (see Figure 7.1).

The menu system is a tree-like structure that repeatedly branches to lower levels until a final screen is reached. Page 1 of a top-level menu shown in Figure 7.1. It comprises four menu choices – Flow rates, Flow totals, Density and Viscosity.

Each menu choice has a description e.g. “Flow rates” and a triangular icon e.g. menu choice. A non-filled, triangular icon ( A filled, triangular icon (

) indicates the menu choice leads to a parameter screen.

) indicates the menu choice leads to a lower-level menu (sub-menu).

alongside to indicate the type of

Note: The menus may be different in your software.

Figure 7.1: page 1 of a top-level menu

Page 7.1

Chapter 7 The menu system

Each menu choice is associated with a lettered button on the front panel on Display Line 1 is associated with the

a button. Similarly, a menu choice on Display Line 2 is associated with the

a, b, c or d. For example, a menu choice

b button, and so on. If there is no menu choice on a display line, the associated letter button will not do anything.

When you do make a menu choice from a menu using the lettered buttons, the display changes to show the selected lower-level menu or a parameter screen.

Figure 7.2 shows an example where pressing the the

b button leads to a lower-level menu for “Flow totals”.

Using the BACK button will return you to the previous menu level.

a button will lead to a lower-level menu for “Flow rates”. Similarly,

Note: The menus may be different in your software.

Figure 7.2: Menu Choice Selection

Where a menu has more choices than can fit on to the 4-line display, the menu comprises of t wo or more pages. Vertical arrow icons appear on the left-hand side of display to indicate there are further pages on the same menu level. Figure 7.3 shows how you can scroll up or down between the pages by using the UP-ARROW and DOWN-

ARROW buttons. These buttons will do nothing unless there is a page to scroll to.

Note: The menus may be different in your software.

Figure 7.3: Pages of a Main Menu

Page 7.2

Chapter 7 The menu system

At the lowest levels in each branch of the menu system, there are parameter screens. Figure 7.4 shows how to navigate to the parameter screen for <MeterRun Temperature>. All parameter screens feature a solid, black, triangular shaped mark in the bottom-left corner of Display Line 4.

Note: Full details about editing parameters can be found in Chapter 6.

Note: The menus may be different in your software.

Figure 7.4: A typical software parameter screen

Page 7.3

Chapter 7 The menu system

Returning to the top-level menu again, there are menu choices that are common to all software versions (Figure 7.5). In addition, you’ll encounter them in subsequent chapters.

All other menu choices on the Main Menu (e.g. “Flow rates”) are for operators to quickly find final measurements and other calculation results. Chapter 12 has tables showing these menus in more detail.

Leads to menus for viewing interim results of measurements and other calculations, Inputs, Outputs, etc. (See Chapter 12 for a full map)

Leads to menus for editing measurement tasks for your installation. (See Chapters 8 - 11).

Leads to a screen for entering a password to change security level. (See Chapter 11).

Leads to a screen detailing the software version number.

Figure 7.5: Menus common to all software versions

Leads to a screen where you can view/edit text to identif

the 795x.

Leads to menus where you can view/edit the time and date, plus machine cycle timing.

Page 7.4

Chapter 8 Alarms

8. Alarms

8.1 Alarms

8.1.1 Alarm types

The types of alarms that are detected and recorded are:

System alarms, caused by one or more of:

• Power failure.

• Battery low (if a battery is fitted).

• Watchdog.

• RAM checksum failure.

• ROM checksum failure.

Input alarms, caused by one or more of:

• Failure of analogue inputs.

• Failure of density transducers.

• Incorrect data has been entered.

Limit alarms, caused by one or more of:

• Limits which you have set.

• Limits defined by the system.

These always result in two alarms - one when the change first happens and another when the system returns to its normal state.

8.1.2 Alarm indicators

The 795x has three LED indicators to show alarm status; one each for Input, System and Limit Alarms. Each alarm indicator can be in one of three states:

Off The system is working normally.

Flashing An alarm has been received but has not yet been accepted.

On All alarms has been accepted but not yet cleared. The conditions that caused the alarms in the first

place may still exist.

1. System alarm 2. Input Alarm 3. Limit Alarm

Figure 8.1: Alarm indicators on the front panel

Page 8.1

Chapter 8 Alarms

8.1.3 How alarms are received and stored

When a new alarm is received, the appropriate indicator LED on the front panel starts flashing. If the indicator is already flashing because of a previous alarm, it continues to do so. If the indicator is already ON (steady), it starts to flash.

Information about alarms is stored in two logs:

• The Alarm Status Display This gives: (1) a summary of the contents of the Historical Alarm Log

(2) an indication of the current status of the system.

• The Historical Alarm Log This contains an individual entry for every alarm stored in the log.

The Historical Alarm Log can store up to 30 entries. When a new alarm is received, one of two things can happen:

If the Historical Alarm Log is NOT full:

An entry for the new alarm is simply added to the list.

If the Historical Alarm Log is full:

It depends on how the system is set up: Either (1) the oldest entry is deleted and the new one is added to the top of the list, or (2) the new alarm is discarded. In either case, the Status Display is updated automatically.

8.1.4 Examining the Alarm Status Display and Historical Alarm Log

Press the INFORMATION MENU (i) button if you want to examine the Alarm Status Display or the Historical Alarm Log.

• To bring up the Alarm Status Display, select the Alarm Summary option.

• To bring up the first entry in the Historical Alarm Log, select the Alarm History option.

• To return to the INFORMATION MENU from the two screens , you can use the BACK button

Page 8.2

Figure 8.2: How to get to the alarm log

Chapter 8 Alarms

8.1.5 What the Alarm Status Display tells you

A typical Alarm Status Display is shown in Figure 8.2. The display lists, for each type of alarm (System, Input or Limit), the number of alarms that are live and new.

• New alarms are alarms that have been received but not accepted.

• Live alarms are alarms that refer to conditions still active.

An example of a live alarm is when there is a fault in the system. This produces two alarms - one when the fault first occurs (‘ON’) and the second when it is put right (‘Off’). If only the first alarm of the pair has been received, the alarm is said to be live because the condition still exists.

The number of live alarms tells you how many faults are still active. If you look at the Historical Alarm Log this tells you more about these faults.

8.1.6 What the entries in the Historical Alarm Log tell you

Figure 8.3 shows a typical display and the function of the relevant buttons.

Key to figure:

1. Indicates if there are entries BEFORE this one

2. Alarm is either ‘ON’ (fault occurrence) or ‘OFF’ (fault cured).

3. Type of alarm

4. Indicates alarm not accepted

5. Accept this alarm

6. Alarm description and extra identifier to qualify the alarm

7. Clear this alarm entry

8. Date and time that this alarm (message) was raised.

9. Identifies a metering-run/stream - not applicable to single

meter-run/stream software

10. Indicates that there are alarm entries AFTER this one

11. Scroll DOWN through the entries

12. Scroll UP through the alarm entries

13. Clear all alarm entries.

Figure 8.3: A typical entry in the log

Each alarm has its own entry in the Historical Alarm Log that tells you:

• Type of alarm

Whether it is a System alarm, Input alarm or Limit alarm and if the alarm is ‘on’ or ‘off’.

• Extra identifier for the alarm

This is not always shown for every entry but, where it is shown, it could be one of the following:

• A digit This indicates the channel number on which the fault occurred.

• A letter H and L are for high and low Limit alarms, S is for a step alarm.

• Date and time

The date is in the format DD-MM-YY and the time HH:MM:SS. These are entered automatically by the system when the alarm is received. The time is accurate to within one second.

Page 8.3

Chapter 8 Alarms

• Acceptance indication This is only shown for those entries that have not been accepted. When the entry is accepted, the indicator disappears.

• Other entries indication An up-arrow symbol shows that there are entries before the present one, whilst a down-arrow symbol shows that there are others after. If the entry currently shown is first in the list, there is no up-arrow. If it is last, there is no down-arrow.

• Description of the alarm This is an abbreviated description of the alarm and should be sufficient to help you trace the cause of the problem. A complete list of alarm messages, and what they mean, is on page 8.3.

8.1.7 Clearing all entries in the Historical Alarm Log

To clear all the alarm entries in the historical log, press the CLR button. This clears all entries in the Historical Alarm Log, zeroes the entries in the Status Display and sets all LED indicators to OFF.

8.1.8 Alarm Messages

Alarm message Type What it means

AGA8 calculation could not be completed due to a problem.

AGA8 failed Input

AGA8 T.P. range Input

Atmos press limit Limit [H]igh, [L]ow or [S]tep limit for Atmospheric pressure has been exceeded Bad gas data System Raw gas data is incorrect Base dens limit Limit [H]igh, [L]ow or [S]tep limit for Base Density has been exceeded Battery failed System 795x needs a new battery Battery low System 795x needs a new battery as soon as possible Comparison limit Limit Either the A or B user alarms are out of limits Chromat error Limit The Chromatograph has indicated that it has an error of some kind. Chromat slv fail Limit MODBUS communications with a Chromatograph (acting as a slave) have

Compress. fail Limit Compressibility calculation has not been fully configured. Database corrupt System

DBM bad chksum. System The memory checksum has failed. The 795x needs to be re-configured.

DBM bad triple System

Additional alarm message letters: ‘C’=Composition, ‘L’=Line, ‘B’=Base Temperature and pressure are outside the range that can be handled by

AGA-8. Additional alarm message letters: ‘L’=Line, ‘B’=Base

failed.

Notification that the 795x database has been automatically fixed after corruption was detected. Check the configuration in case data has been changed.

Additional character that may be seen: ‘V’=Volatile memory, ‘N’=Non-volatile memory (RAM/FRAM)

Notification that one or more copies of the data were corrupted. This problem is corrected automatically but the configuration needs to be checked.

Additional character that may be seen: ‘0’=RAM, ‘1’=NVM-copy1, ‘2’= NVM-copy2, ‘3’=padding, ‘!’=beyond repair

Page 8.4

Chapter 8 Alarms

Comparison limit of density ‘A’ and ‘B’ measurements exceeded

Dens comp. limit Limit

Additional alarm message letters: ‘L’=Line density, ‘B’=Base density

Dens temp A limit Limit [H]igh, [L]ow or [S]tep limit for DensityA temperature exceeded Dens temp B limit Limit [H]igh, [L]ow or [S]tep limit for DensityB temperature exceeded

Density cal fail System

A particular density input has not been calibrated. Additional character seen is the channel number.

Gas slave fail Limit MODBUS communications with a 795x (configured as a “Gas Slave”) have

failed. Line dens limit Limit [H]igh, [L]ow or [S]tep limit for line density exceeded Line temp limit Limit [H]igh, [L]ow or [S]tep limit for Line temperature exceeded LineTxdr Calcfail Input A line density calculation failed because of incorrect data Live CO2 limit Limit [H]igh or [L]ow limit for live carbon dioxide exceeded Live Energy limit Limit [H]igh or [L]ow limit for live energy exceeded Live N2 limit Limit [H]igh or [L]ow limit for live nitrogen exceeded mA input failed Input A mA-type analogue input has failed. Additional character seen is the channel

number. mA input no cal System

A mA-type analogue input is not calibrated. Additional character seen is the

channel number. mA out cal. fail System

A mA-type analogue output calibration has failed. Additional character seen is

the channel number. mA output failed System

A mA-type analogue output has failed. Additional character seen is the

channel number. mA output no cal System

A mA-type analogue output is not calibrated. Additional character seen is the

channel number. Power fail System Power supply to the 795x has been interrupted Pressure limit Limit [H]igh, [L]ow or [S]tep limit for Line pressure exceeded Prt input failed Input A PRT input has failed. Additional character seen is the channel number.

Prt no cal System

A PRT-type analogue input has not been calibrated. Additional character seen

is the channel number. SG compare limit Limit Limit for comparison of SG ‘A’ and SG ‘B’ value s exceeded SG limit Limit [H]igh or [L]ow limit for specific gravity exceeded SpEqu1 calc fail Input Incorrect data caused Special Equation 1 to fail SpEqu2 calc fail Input Incorrect data caused Special Equation 2 to fail Timeperiod failed Input A time-period input has failed. Additional character seen is the channel

number. Timeperiod glitch Input A glitch has occurred on a time-period input. Timeperiod no cal System A time period input is not calibrated User alarm Limit User alarm ‘X’ or ‘Y’ activated

Page 8.5

Chapter 8 Alarms

Page 8.6

Chapter 9 Additional facilities

9. Additional facilities

9.1 What this chapter tells you

You can also specify features such as:

• Fallback values and modes to be used if live inputs fail.

• Limits which, if exceeded, trigger alarms.

• The units in which the calculations are performed and are di splayed.

The following sections give more information about these, and other, topics which relate to the way in which data is processed.

9.2 Selecting units and data formats

You can select the units which the 795x uses for its calcul ation s and in which i t display s the data , as well as the

formats in which the data is display ed. You can choose the units and formats for:

• Line density.

• Base density.

• Temperature.

• Pressure.

• Energy(Cv/m).

• Time period input.

A full list of the units (metric and imperial) is given at the end of this chapter. Note that, if you change the units, the values are converted automatically to reflect the change .

9.3 Limits

You can set limits for some paramete rs so tha t an ala rm is genera ted if the limits are exceede d.

There are three types of limit:

• High limit: The highest value which the parameter can have before an alarm is generated.

• Low limit: The lowest value which the parameter can ha ve be fore an alarm is genera ted.

• Step limit: The greatest allowable step between su ccessive values before an al arm is generated.

The parameters, and the types of limit which you can set for them, are:

• Line density: high, low and step

• Base density: high, low and step

• Line temperature: high, low and step

• Density temperature: high, low and step

• Line pressure: high, low and step

• Alarm X and Y: high and low

• Specific gravity: high, low and step

Page 9.1

Chapter 9 Additional facilities

9.4 Fallback values and modes

A fallback value is used as a temporary substitute for a parameter if a live input (i.e., the transducer, transmitter or wiring), which is normally used to calculate the parameter, should fail.

A fallback must have one of the following modes:

• None The system uses whatever value is available for the parameter regardless of whether or not the live input has failed.

• Last good value The system uses, for the parameter, the last value prior to failure.

• Fixed value The system uses whatever fixed value you have specified for the fallback.

You can set fallback values for:

• Line density.

• Base density.

• Line temperature.

• Line pressure.

• Specific gravity.

• Density temperature.

• Atmospheric pressure.

• CO

• Energy (Cv/m).

and N2.

9.5 Analogue 0% and 100% values

These are values which specify the zero and span of analog ue inputs and outputs.

9.6 Live and set data

What are live and set data?

Stored data can be either live or set. Live data is continually updated by new data received from transducers or other transmitters. Set data is data that you have entered via the keyboard; it does not change unless you enter new data.

Why should I want to set data? You may want to set data for reasons such as:

• You want to test the flow computer’s programming

If you want to test the flow computer’s programming it is much easier if you use known, fixed data.

• You don’t want to monitor a particular parameter constantly or don’t want to monitor it at all.

If a parameter is not likely to change significantly or if it is not important to measure it accurately, you may not want to connect a transducer or transmitter. In this case, set data may be accurate enough for your purposes.

• A particular transducer or transmitter is out of action.

You can temporarily set the data to a fixed representative value until the transducer is repaired or replaced.

Page 9.2

9.7 Units which the 795x can display

The 795x can display data values with many different units, as listed in Table 9.1 below. However, when communicating with other devices, the data is always sent using the standard units.

In Table 9.1, the following definitions are used:

• Standard units: Units which the 795x displays unless you choose an alternative.

• Other units: Units which you can choose instead of the standard.

Note that many of the abbreviations used in the tables are defined in the glossary.

Table 9.1: Units of measurement

Chapter 9 Additional facilities

Parameter Default

Temperature Deg. C Deg. F Kelvin Ohms Pressure bar abs Pa abs

Density kg/m3 tonnes/m3 oz/in3 oz/ft3 oz/barrel oz/gallon (UK) oz/gallon (US) lb/in3 lb/ft3 lb/barrel lb/gallon (UK) lb/gallon (US) tons/ft3 tons/barrel tons/gallon(UK) tons/gallon (US) g/cc g/litre g/m3 kg/cc kg/litre Base density kg/m3 Time

Gas data % PPM Mole fraction Calorific value MJ/m3

units

μs

Other units available

KPa abs psia kPa guage

As for density sec

day

Energy units / volume units

bar guage

MPa guage

min hour

MPa abs Pa guage psig

Page 9.3

Chapter 9 Additional facilities

Page 9.4

Chapter 10 Configuring your instrument by using wizards

10. Configuring your instrument by using wizards

10.1 What this chapter tells you

This chapter features complete maps of all the configuration wizards. Each map shows all the possible routes through a wizard.

10.2 Wizards: Configuring the easy way

Wizards are configuration tools which are written into the instrument’s software. To configure your instrument, just select the wizard which fits your requirements most closely, follow the prompts to supply the information it asks for and then, if necessary, edit the resulting configuration to match your exact needs.

Wizards are easy to use. We recommend that you use them to configure your installation.

From Configure option on Main Menu

b c d

Transducer details

Wizards

Analoge inputs

Line density

Figure 10.1: How to get to the wizards menu

10.3 Wizard Maps: Conventions used

Maps are represented in a form that closely resembles a flow chart. The basic conventions for a wizard map are shown in Figure 10.2 on the page 10.2.

Setup wizard

b c d

Setup wizard

Units wizard

b c d

Page 10.1

Chapter 10 Configuring your instrument by using wizards

Wizard

Heading

"Option n"

"Option 1" "Option 2"

Setup wizard

'b' key

Option 1 Option 2 Option n

Programmable item

Heading

(Selection)

Selection 1

Selection 2

etc.

Selection n

This represents the selection of the wizard. It is the start point for every wizard. Pressing the 'b' key or the enter key confirms the selection.

An arrow indicates where a wizard will continue to. It may (or may not) have a label to identify a particular path the wizard is taking

This format indicates a situation where there are two or more options. Choosing any option here will determine the subsequent path taken by the wizard.

Note that all of the options are always shown in this box. However, the 795x splits options into pages.

An item prompt that appears with the name of the item along with programmable properties - a value, units of measurement and present status. Edit properties and then press the enter key for wizard to continue.

An item prompt with a dotted outline will not always appear. A note alongside states the condition needed for it to appear.

The shaded areas indicate a situation where there are two or more options. Choosing an option here may influence the subsequent path taken by the wizard.

Pressing the 'b' key, when this screen first appears, starts the selection process. The up / down arrow keys cycle through available options.

Pressing the enter key confirms the option displayed as the one chosen. Pressing enter a second time makes the wizard continue.

Page 10.2

Exit wizard

n=1

The wizard selection screen is always shown after exiting a wizard

Route will be continued where there is a unique connector with a matching code. Note that the letter in the code is unique to a wizard - A is used for the Flow meter wizard (Orifice route).

Route continues from a connector with a matching code. The letter in the code is unique to a wizard - A is used for the Flow meter wizard (Orifice route).

This provides information for a prompt that follows. For example, in the Line Density wizard, the value of n will be seen to complete a PTZ descripor. PTZ n will be PTZ 1 when n=1. PTZ n will be PTZ 2 when n=2.

Figure 10.2: Key to wizard map conventions

Chapter 10 Configuring your instrument by using wizards

10.4 Quick-start Guide ( Set-up Wizards )

Wizard Measurement Task Page

Density 1

Density 2

Density 1 & 2

SG 1

SG 2

SG 1 & 2

Line density Base density

Specific gravity

Temperature

Pressure • Line pressure 10.22

Transmitters

Special Calc. • Special equations 1 an d 2 10.27 Analogue outputs

Alarms • User defined alarms 10.29 Multi-view • Multi-page multi-view

Full Setup • A collecti on of wizards for configuring a whole system

• Gas density measurement (nominated as density ‘A’) from a single transducer that is connected to “Density input 1”.

• Gas density measurement (nominated as density ‘B’) from a single transducer that is connected to “Density input 1”.

• Gas density measurements (nominated as densit y ‘A’ and density ‘B’) from two transducers that are connected to “Density input 1” and “Density input 2”.

• Specific gravity measurement (nominated as SG ‘A’) from a single transducer that is connected to “Density Input 3”.

• Specific gravity measurement (nominated as SG ‘B’) from a single transducer that is connected to “Density Input 4”.

• Specific gravity measurements (nominated as SG ‘A’ and SG ‘B’) from two transducers that are connected to “Density input 3” and “Density input 4”

• Density ‘A’

• Density ‘B’

• Base density ‘A’

• Base density ‘B’

• SG ‘A’

• SG ‘B’

• Line temperature

• Density temperature ‘A;

• Density temperature ‘B’

• Live nitrogen measurement from an analogue input

• Live carbon dioxide measurement from an analogue input

• Live energy measurement from an analogue input

•

10.6

10.8

10.10

10.11

10.12

10.13

10.16

10.18

10.20

10.24

10.28

10.30

10.31

Page 10.3

Chapter 10 Configuring your instrument by using wizards

10.5 Set-up Wizard Selection Map

After using the menu to arrive at the wizard sub-menu, as shown earlier in Figure 10.1, a wizard option can be chosen.

Selection Procedure

1. Press the b-button to begin the selection process.

2. Use the up/down arrow buttons to cycle through all the availabl e wizard options.

3. Press either the b-button or the enter button to select the wizard option that presently appears on the 795x display.

4. Examine and then follow directions provided alongside the prompt of the selected wizard option,

Setup wizard

(Selection)

Selecting this, with the 'B'-key, starts the wizard selection process. Use scroll up/down arrow keys to move through the wizard options.

Select option

Choosing this causes configured data to

Initialise

be restored to default values

Multi-view

Alarms

Analogue outputs

Special Calc.

Transmitters

Pressure

Temperature

Specific gravity

Base density

Line density

SG 1 & 2

SG 2

SG 1

Density 1 & 2

Turn to page 10.30

Turn to page 10.29

Turn to page 10.28

Turn to page 10.27

Turn to page 10.24

Turn to page 10.22

Turn to page 10.20

Turn to page 10.18

Turn to page 10.16

Turn to page 10.13

Turn to page 10.12

Turn to page 10.11

Turn to page 10.10

Refer to "Density 1" and "Density 2" wizard maps.

Page 10.4

Density 2

Density 1

Full Setup

Turn to page 10.8

Turn to page 10.6

Turn to page 10.31

Figure 10.3: Set-up Wizard Selection

10.6 Units Wizard Selection Map

After using the menu to arrive at the units wizard sub-menu, as shown earlier in Figure 10.1, a wizard option can be chosen.

Selection Procedure

1. Press the b-button to begin the selection process.

2. Use the UP/DOWN ARROW buttons to cycle through all the available unit wizard options.

3. Press either the b-button or the ENTER button to select the unit wizard option that presently appears on the 795x display.

Units wizard

(Selection)

Choose option

Chapter 10 Configuring your instrument by using wizards

Selecting this, with the process. Use the options and then press the b-key (or the enter key) to confirm the selection.

b-key

up/down

, starts the units selection

keys to move through the

Metric

Imperial

"Metric"

"Imperial"

Exit wizard

"SI"

Figure 10.4: Units Wizard Selection

Page 10.5

Chapter 10 Configuring your instrument by using wizards

10.7 Density 1 application wizard

Setup wizard

Density 1

'b' key

Edit Gas density A?

Yes

"Yes"

Transducer A K0

Transducer A K1

"No"

Edit Dens.Temp. A?

Yes

"No"

Edit Special equations?

Yes

"No"

Edit Analog outputs?

Yes

"No"

Edit User Alarms?

Yes

"No"

"Yes"

See note 1

See note 2

See note 3

See note 4

Transducer A K2

Edit Density Limits & Fallback?

"Yes"

Line density hi lmt

Line density lo lmt

Prime dens FB type

(Selection)

Fallback value

Last Good Value

Yes

"No"

Exit Wizard

Page 10.6

Edit Multi view?

See note 5

Prime density FB val

Appears for

"Fallback value"

"No"

Yes

"Yes"

Exit Wizard

Wizard Map Notes

(1) Route detours to a "Density Temp. A?" sequence (as seen in the "Temperature" wizard map) before continuing.

(2) Route detours to a "Special Equation" wizard map sequence before continuing.

(3) Route detours to an "Analogue output" wizard map sequence before continuing.

(4) Route detours to a "User Alarm" wizard map sequence before continuing.

(5) Route detours to a "Multiview" wizard map sequence before continuing.

“Density 1” Wizard Map - Part 1 of 2

only

Chapter 10 Configuring your instrument by using wizards

Temperature & VOS Correction Sequences

From

"Part 1"

page

Density A corrections

(Selection)

None

Temp and VOS

VOS

Temp

"None"

"Temp"

Transducer A K18

Transducer A K19

Density A offset

Route returns to : "Edit Density Limits & Fallback " prompt (on previous page) unless VOS correction has also been selected.

Line dens A VOS type

(Selection)

P method

SG method

VOS

Density Transducer A

(Selection)

7812 N2 high

7812 N2 low

7811 AR high

7811 N2 high

7811 N2 low

7810 CH4 medium

7810 N2 low

7812 AR high

Line density A gamma

Tranducer A K3

Appears for "SG method" only

Transducer A K4

Tranducer A K5

Appears for "P method" only

Transducer A K6

Density A offset

Route returns to " Edit Density Limits & Fallback " prompt (on previous page) unless temperature correction has also been selected.

“Density 1” Wizard Map - Part 2 of 2

Page 10.7

Chapter 10 Configuring your instrument by using wizards

10.8 Density 2 application wizard

Setup wizard

Density 2

'b' key

Edit Gas density B?

Yes

"Yes"

Transducer B K0

Transducer B K1

"No"

Edit Dens.Temp. B?

Yes

"No"

Edit Special equations?

Yes

"No"

Edit Analog outputs?

Yes

"No"

Edit User Alarms?

Yes

"No"

"Yes"

See note 1

See note 2

See note 3

See note 4

Transducer B K2

Edit Density Limits & Fallback?

"Yes"

Line density hi lmt

Line density lo lmt

Prime dens FB type

(Selection)

Fallback value

Last Good Value

Yes

"No"

Exit Wizard

Page 10.8

Edit Multi view?

See note 5

Prime density FB val

Appears for

"Fallback value"

"No"

Yes

"Yes"

Exit Wizard

Wizard Map Notes

(1) Route detours to a "Density Temp. B?" sequence (as seen in the "Temperature" wizard map) before continuing.

(2) Route detours to a "Special Equation" wizard map sequence before continuing.

(3) Route detours to an "Analogue output" wizard map sequence before continuing.

(4) Route detours to a "User Alarm" wizard map sequence before continuing.

(5) Route detours to a "Multiview" wizard map sequence before continuing.

“Density 2” Wizard Map - Part 1 of 2

only

Chapter 10 Configuring your instrument by using wizards

Temperature & VOS Correction Sequences

From

"Part 1"

page

Density B corrections

None

Temp and VOS

VOS

Temp

"None"

Route returns to : "Edit Density B Limits & Fallback " prompt (on previous page) unless VOS correction has also been selected.

(Selection)

"Temp"

Transducer A K18

Transducer A K19

Calibration Temp

Density A offset

Line dens B VOS type

(Selection)

P method

SG method

VOS

Density Transducer A

(Selection)

7812 N2 high

7812 N2 low

7811 AR high

7811 N2 high

7811 N2 low

7810 CH4 medium

7810 N2 low

7812 AR high

Line density A gamma

Tranducer B K3

Appears for "SG method" only

Transducer B K4

Tranducer B K5

Appears for "P method" only

Transducer B K6

Density A offset

Route returns to " Edit Density B Limits & Fallback " prompt (on previous page) unless temperature correction has also been selected.

“Density 2” Wizard Map - Part 2 of 2

Page 10.9

Chapter 10 Configuring your instrument by using wizards

10.9 SG-1 Application Wizard

This wizard can be used to configure a system that has a 3096 gas specific gravity transducer connected to “Density input 3”. Special equations, analogue outputs, user alarms and multi-view can also be configured here.

Setup wizard

SG 1

'b' key

Edit Gravitometer A?

Yes

"Yes"

SG A K2

SG A K0

Edit SG Limits & Fallback?

Yes

"Yes"

SG hi limit

SG low limit

Prime SG FB type

(Selection)

Fallback value

Last Good Value

"No"

Edit Special equations?

Yes

"No"

Edit Analog outputs?

Yes

"No"

Edit User Alarms?

Yes

"No"

Edit Multi view?

Yes

"No"

Exit Wizard

"Yes"

See note 1

"Yes"

See note 2

"Yes"

See note 3

"Yes"

See note 4

Appears for

"Fallback value"

Page 10.10

Prime SG FB value

only

Wizard Map Notes

(1) Route detours to the "Special Equation" wizard sequence before continuing.

(2) Route detours to the "Analogue output" wizard sequence before continuing.

(3) Route detours to the "User Alarm" wizard sequence before continuing.

(4) Route detours to the "Multiview" wizard sequence before continuing.

“SG1” Application Wizard Map

10.10 SG-2 Application Wizard

This wizard can be used to configure a system that has a 3096 gas specific gravity transducer connected to “Density input 4”. Special equations, analogue outputs, user alarms and multi-view can also be configured here.

Setup wizard

SG 2

'b' key

Chapter 10 Configuring your instrument by using wizards

Edit Gravitometer B?

Yes

"Yes"

SG B K2

SG B K0

Edit SG Limits & Fallback?

Yes

"Yes"

SG hi limit

SG low limit

Prime SG FB type

(Selection)

Fallback value

Last Good Value

"No"

Edit Special equations?

Yes

"No"

Edit Analog outputs?

Yes

"No"

Edit User Alarms?

Yes

"No"

Edit Multi view?

Yes

"No"

Exit Wizard

"Yes"

See note 1

"Yes"

See note 2

"Yes"

See note 3

"Yes"

See note 4

Prime SG FB value

Appears for

"Fallback value"

only

Wizard Map Notes

(1) Route detours to the "Special Equation" wizard sequence before continuing.

(2) Route detours to the "Analogue output" wizard sequence before continuing.

(3) Route detours to the "User Alarm" wizard sequence before continuing.

(4) Route detours to the "Multiview" wizard sequence before continuing.

“SG2” Application Wizard Map

Page 10.11

Chapter 10 Configuring your instrument by using wizards

10.11 SG-1&2 Application Wizard

This wizard can be used to configure a system that has 3096 gas specific gravity transducers connected to “Density input 3” and “Density input 4”. Special equations, analogue outputs, user alarms and multi-view can also be configured here.

Setup wizard

SG 1 & 2

'b' key

Edit Gravitometer A+B?

Yes

"Yes"

SG A K2

SG A K0

SG B K2

SG B K0

Edit SG Limits & Fallback?

Yes

"Yes"

SG hi limit

SG low limit

SG comp limit

"No"

Edit Special equations?

Yes

"No"

Edit Analog outputs?

Yes

"No"

Edit User Alarms?

Yes

"No"

Edit Multi view?

Yes

"No"

"Yes"

See note 1

"Yes"

See note 2

"Yes"

See note 3

"Yes"

See note 4

Appears for

"Fallback value"

Page 10.12

Prime SG FB type

(Selection)

Fallback value

Last Good Value

Prime SG FB value

only

Exit Wizard

Wizard Map Notes

(1) Route detours to the "Special Equation" wizard sequence before continuing.

(2) Route detours to the "Analogue output" wizard sequence before continuing.

(3) Route detours to the "User Alarm" wizard sequence before continuing.

(4) Route detours to the "Multiview" wizard sequence before continuing.

“SG1&2” Application Wizard Map

10.12 Line density wizard

This wizard configures the 795x for getting line density ‘A’ and/or line density ‘B’ data.

Chapter 10 Configuring your instrument by using wizards

Setup wizard

Line Density

'b' key

Line density prime selection ?

Automatic

"A"

Edit Line density A calc ?

"Yes"

Transducer A K0

Transducer A K1

Transducer A K2

Density A correction

(Selection)

None

Temp and VOS

VOS

Temp

Transducer A K18

Transducer A K19

"None"

Density A offset

A B

Yes

"Temp"

"B"

"Auto"

"No"

"VOS"

"A"+"B"

route

"Temp

and

VOS"

Follow "Temp" route and then

follow "VOS"

route

Line dens A VOS type

(Selection)

P method

SG method

Density Transducer A

(Selection)

7812 N2 high

7812 N2 low

7811 AR high

7811 N2 high

7811 N2 low

7810 CH4 medium

7810 N2 low

7812 AR high

Line density A gamma

Transducer A K5

Transducer A K6

Transducer A K3

Transducer A K4

Edit Density Limits & Fallback ?

Line density hi lmt

Line density lo lmt

Line density comp lmt

Prime dens FB type

Fallback value

Last Good Value

Prime density FB val

Exit

wizard

Appears for

"Fallback value"

only

Appears for "P method"

Appears for

"SG method"

"No"

Yes

"Yes"

(Selection)

only

Density A offset

“Line density” Wizard Map - Part 1 of 3

Page 10.13

Chapter 10 Configuring your instrument by using wizards

Sequence : Line density ‘B’ measurement

Line density B selection?

Time Period

Analogue input

"Analogue input"

Edit Line density B analogue input ?

Line den B input chl

mA input 1

mA input 2

mA input 10

Line Dens B @ 100%

Line Dens B @ 0%

Analogue input n type

PT100 input

0 - 20mA input

4 - 20mA input

Input channel n

PTZ1

"Yes"

Yes

"Yes"

(Selection)

etc.

(Selection)

"PTZ1"

"Time Period"

"No"

"Part 1"

See

page

This

apppears

only for mA

inputs 1 to 4

Note :

'n' is the

number of

the mA

input

selected

earlier

Edit Line density B calc ?

Transducer B K0

Transducer B K1

Transducer B K2

Density B correction

(Selection)

None

Temp and VOS

VOS

Temp

"None"

Transducer B K18

Transducer B K19

Density B offset

Yes

"Yes"

"Temp"

"SG method"

See

"Part 1"

page

"No"

"VOS"

Appears for

"P method"

only

Appears for

only

Line dens B VOS type

(Selection)

P method

SG method

Density Transducer B

(Selection)

7812 N2 high

7812 N2 low

7811 AR high

7811 N2 high

7811 N2 low

7810 CH4 medium

7810 N2 low

7812 AR high

Line density B gamma

Transducer B K5

Transducer B K6

Transducer B K3

Transducer B K4

Density B offset

Page 10.14

See

"Part 1"

page

Wizard Map Notes

1. The sequence for "Temp and VOS" correction includes the "Temp" route followed by the "VOS" route.

2. Density B offset appears after all sequences for the selected corrections have been completed.

“Line density” Wizard Map - Part 1 of 3

Sequence : Line density ‘B’ measurement using PTZ1 method

Edit PTZ1 calculation ?

PTZ1 calc select

From

"Part 1"

page

Yes

"Yes"

(Selection)

See

"Part 1"

page

Chapter 10 Configuring your instrument by using wizards

Route 1

Edit SGERG parameters ?

Yes

"Yes"

SGERG selector

(Selection)

Route 3

"No" "No"

Edit Nx19-3H parameters?

Yes

"Yes"

Live CO2 value

Live N2 value

AGA-NX19

SGERG

AGA-NX19-mod3h

AGA-NX19-mod

Base temp value

Base pressure value

Follow one of these routes:

- Route 1 for "SGERG",

- Route 2 for "AGA-NX19-mod",

- Route 3 for "AGA-NX19-mod3h",

- Route 4 for "AGA-NX19"

Appearance of these prompts depend on selection for "SGERG Selector".

N2 CO2 Cv RD H2

N2 CO2 Cv -- H2

N2 CO2 -- RD H2

N2 --- Cv RD H2

-- CO2 Cv RD H2

Live N2 value

Live CO2 value

Energy value

SG Prime value

Route 2

Edit Nx19mod parameters?

Yes

"Yes"

Live CO2 value

Live N2 value

SG Prime value

Methane

Ethane

Propane

Hydrogen

SG Prime value

Energy

Route 4

Edit NX19 parameters ?

Yes

"Yes"

AGA-NX19 method

(Selection)

Standard calc

Curve fit

Live CO2 value

Live N2 value

SG Prime value

To "Part 1" page

“Line density” Wizard Map - Part 3 of 3

Page 10.15

Chapter 10 Configuring your instrument by using wizards

10.13 Base density wizard

This wizard configures the 795x for getting base density ‘A’ and/or base density ‘B’ data.

Setup wizard

Base density

'b' key

Base density prime selection ?

A B

Automatic

"A"

SG Prime value

Base density of Air

"B"

"Auto"

"A"+"B"

route

Base density B selection?

Analogue input

"Analogue input"

Edit Line density B analogue input ?

"No"

PTZ1

"Yes"

Yes

"PTZ1"

Appears for

"Fallback value"

Edit Base density Limits & Fallback ?

Yes

"Yes"

Base density hi lmt

Base density lo lmt

Basedensity comp lmt

Base density FB type

(Selection)

Fallback value

Last Good Value

Base density FB val.

Exit

wizard

only

"No"

Base den B input chl

(Selection)

mA input 1

mA input 2

etc.

mA input 10

Base Dens B @ 100%

Base Dens B @ 0%

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

“Base density” Wizard Map - Part 1 of 2

This

apppears

only for mA

inputs 1 to 4

Note :

'n' is the

number of

the mA

input

selected

earlier

Page 10.16

Sequence : Base density ‘B’ measurement using the PTZ1 method

Edit PTZ1 calculation ?

PTZ1 calc select

From

"Part 1"

page

Yes

"Yes"

(Selection)

"Part 1"

page

Chapter 10 Configuring your instrument by using wizards

Route 1

Edit SGERG parameters ?

Yes

"Yes"

SGERG selector

(Selection)

Route 3

"No" "No"

Edit Nx19-3H parameters?

Yes

"Yes"

Live CO2 value

Live N2 value

AGA-NX19

SGERG

AGA-NX19-mod3h

AGA-NX19-mod

Base temp value

Base pressure value

Follow one of these routes:

- Route 1 for "SGERG",

- Route 2 for "AGA-NX19-mod",

- Route 3 for "AGA-NX19-mod3h",

- Route 4 for "AGA-NX19"

Appearance of these prompts depend on selection for "SGERG Selector".

N2 CO2 Cv RD H2

N2 CO2 Cv -- H2

N2 CO2 -- RD H2

N2 --- Cv RD H2

-- CO2 Cv RD H2

Live N2 value

Live CO2 value

Energy value

SG Prime value

Route 2

Edit Nx19mod parameters?

Yes

"Yes"

Live CO2 value

Live N2 value

SG Prime value

Methane

Ethane

Propane

Hydrogen

SG Prime value

Energy

Route 4

Edit NX19 parameters ?

Yes

"Yes"

AGA-NX19 method

(Selection)

Standard calc

Curve fit

Live CO2 value

Live N2 value

SG Prime value

To "Part 1" page

“Base density” Wizard Map - Part 2 of 2

Page 10.17

Chapter 10 Configuring your instrument by using wizards

10.14 Specific gravity wizard

This wizard configures the 795x for getting specific gravity ‘A’ and/or specific gravity ‘B’ data.

Setup wizard

Specific Gravity

'b' key

Specific Gravity prime selection ?

Automatic

"A"

Edit SG A calc ?

"Yes"

SG A K2

Yes

"Auto"

A B

"B"

"No"

"A" route

followed by

the "B" route

Edit SG B selection ?

Time Period

Base density

Analogue input

"Time Period"

SG B K2

"Analogue input"

"Base Density"

Prime Base Density

Turn to

"Part 2"

page

SG A K0

SG B K0

Base density of Air

Edit SG Limits &

From

"Part 2"

page

Fallback ?

"Yes"

Yes

"No"

SG hi limit

SG low limit

SG comp. limit

Prime SG FB type

(selection)

Fallback value

Last Good Value

Appears for

"Fallback value"

only

Prime density FB val

Exit

wizard

“Base density” Wizard Map - Part 1 of 2

Page 10.18

Chapter 10 Configuring your instrument by using wizards

Sequence : Specific gravity ‘B’ measurement from an analogue input

From

"Part 1"

page

Edit SG B analogue input ?

Yes

"Yes"

SG B mA Src

(Selection)

mA input 1

mA input 2

mA input 10

SG @ 100%

SG @ 0%

Analogue input n type

(Selection)

PT100 input

"No"

Turn to

"Part 1"

page

Note : 'n' is the number of the input channel selected earlier.

“Base density” Wizard Map - Part 2 of 2

0 - 20mA input

4 - 20mA input

Input channel

Turn to

"Part 1"

page

Page 10.19

Chapter 10 Configuring your instrument by using wizards

10.15 Temperat ure wizard

This wizard configures the 795x for getting line temperature ‘A’ and/or density temperature ‘A’ and/or density temperature ‘B’ data.

Note : 'n' is the number of the input channel selected earlier

Setup wizard

Temperature

'b' key

Edit Line Temperature ?

Yes

"Yes"

Line temp input chl

(Selection)

Analogue input 1

Analogue input 2

etc.

mA input 10

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Line temp @ 100%

"No"

From

"Part 2"

page

Edit Dens. Temp. A ?

Yes

"Yes"

Dens tempA input chl

(Selection)

Analogue input 1

Analogue input 2

etc.

mA input 10

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Dens tempA @ 100%

"No"

From

"Part 2"

page

Edit Dens. Temp B ?

"Yes"

Dens tempB input chl

Analogue input 1

Analogue input 2

mA input 10

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Dens tempB @ 100%

Exit wizard

"No"

Yes

(Selection)

etc.

Page 10.20

Line temp @ 0%

Turn

"Part 2"

page

Dens tempA @ 0%

Input channel n Input channel nInput channel n

Turn

"Part 2"

page

“Temperature” Wizard Map - Part 1 of 2

Dens tempB @ 0%

Turn

"Part 2"

page

From

"Part 1"

page

Chapter 10 Configuring your instrument by using wizards

From

"Part 1"

page

From

"Part 1"

page

Edit Temperature Limits & Fallback ?

"Yes"

Line temp high limit

Line temp low limit

Line temp step limit

Line temp FB type

Dens temp B Position

(selection)

None

Fallback Value

Last Good Value

Line temp FB value

Turn to

"Part 1"

page

Yes

"Fallback value"

"No"

Turn to

"Part 1"

page

Appears for

only

Edit Dens. Temp. A Limits & Fallback ?

Yes

"Yes"

Dens tempA high lmt

Dens tempA low lmt

Dens tempA step lmt

Dens tempA FB type

Dens temp B Position

(selection)

None

Fallback Value

Last Good Value

"No"

Turn to

"Part 1"

page

Edit Dens. Temp. B Limits & Fallback ?

"Yes"

Dens tempB high lmt

Dens tempB low lmt

Dens tempB step lmt

Dens tempB FB type

Dens temp B Position

None

Fallback Value

Last Good Value

Dens tempA FB value Dens tempB FB value

Turn to

"Part 1"

page

Appears for

"Fallback value"

only

Exit wizard

“Temperature” Wizard Map - Part 2 of 2

Yes

(selection)

"No

Page 10.21

Chapter 10 Configuring your instrument by using wizards

10.16 Pressure wizard

This wizard configures the 795x for getting line pressure and/or atmospheric pressure data.

Setup wizard

Pressure

'b' key

Edit Line Pressure ?

Yes

"Yes"

Line press input chl

(Selection)

mA input 1

mA input 2

"No"

Edit Line Pressure Limits & Fallback ?

Yes

"Yes"

Line press high lmt

"No"

Turn to

"Part 2"

page

Note

'n' is the number of the input channel selected earlier

mA input 10

Line press 100%

Line press 0% value

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

“Pressure” Wizard Map - Part 1 of 2

Line press low lmt

Line press step lmt

Dens temp B Position

Line press FB type

(selection)

None

Fallback Value

Last Good Value

Line press FB value

Turn to

"Part 2"

page

Appears for

"Fallback value"

only

Page 10.22

Chapter 10 Configuring your instrument by using wizards

Sequence : Atmospheric pressure from an analogue input

From

"Part 2"

page

Note

'n' is the number of the input channel selected earlier

Edit Atmos. Pressure ?

Yes

"Yes"

Atmosp input chl

(Selection)

mA input 1

mA input 2

mA input 10

Atmosp 100% value

Atmosp 0% value

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

"No"

Exit wizard

Edit Atmosp. Pressure Limits & Fallback ?

"Yes"

Atmosp high limit

Atmosp low limit

Atmosp step lmt

Atmosp FB type

Dens temp B Position

(selection)

None

Fallback Value

Last Good Value

Atmosp FB value

Exit

wizard

“Pressure” Wizard Map - Part 2 of 2

Yes

"No"

Exit wizard

Appears for

"Fallback value"

only

Page 10.23

Chapter 10 Configuring your instrument by using wizards

10.17 Transmitter wizard

This wizard configures the 795x for getting live CO2 and/or live N2 and/or live energy data.

Setup wizard

Transmitter

'b' key

Edit Transmitter ?

CO2

Cv/m

"CO2"

Line CO2 input chl

(Selection)

mA input 1

mA input 2

"Cv/m"

"N2"

Turn to "Part 2" page

Turn to "Part 3" page

Edit Live CO2 Limits & Fallback ?

Yes

"Yes"

Live CO2 high limit

"No"

Exit

wizard

Note

'n' is the number of the input channel selected earlier

mA input 10

Live CO2 @100%

Live CO2 @ 0%

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

“Transmitter” Wizard Map - Part 1 of 3

Live CO2 low limit

Dens temp B Position

Live CO2 FB type

(selection)

None

Fallback Value

Last Good Value

Live CO2 FB value

Exit

wizard

Appears for

"Fallback value"

only

Page 10.24

Chapter 10 Configuring your instrument by using wizards

Sequence : Live N2 from an analogue input

From

"Part 1"

page

Live N2 input chl

(Selection)

mA input 1

mA input 2

mA input 10

Live N2 @100%

Live N2 @ 0%

Edit Live N2 Limits & Fallback ?

Yes

"Yes"

Live N2 high limit

Live N2 low limit

"No"

Exit wizard

Note

'n' is the number of the input channel selected earlier

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

“Transmitter” Wizard Map - Part 2 of 3

Live N2 FB type

Dens temp B Position

(selection)

None

Fallback Value

Last Good Value

Live N2 FB value

Exit

wizard

Appears for

"Fallback value"

only

Page 10.25

Chapter 10 Configuring your instrument by using wizards

Sequence : Live energy value from an analogue input

From

"Part 1"

page

Live energy input

(Selection)

mA input 1

mA input 2

mA input 10

Live energy @100%

Live energy @ 0%

Edit Live Cv/m Limits & Fallback ?

"Yes"

Live energy high lmt

Live energy low lmt

Yes

"No"

Exit wizard

Note

'n' is the number of the input channel selected earlier

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel

“Transmitter” Wizard Map - Part 3 of 3

Live energy FB type

Dens temp B Position

(selection)

None

Fallback Value

Last Good Value

Live energy FB value

Exit

wizard

Appears for

"Fallback value"

only

Page 10.26

10.18 Special Calculation wizard

Setup wizard

Special Calc.

'b' key

Chapter 10 Configuring your instrument by using wizards

Edit Special equation:

"1"

General equ. const A

General equ. const B

General equ. const X

General equ. const Y

General equ. ptr. a

General equ. ptr. b

General equ. ptr. c

General equ. ptr. d

General equ. ptr. e

General equ. ptr. f

General equation

(Free-form text)

"2"

1 2

General equ2 const A

General equ2 const B

General equ2 const C

General equ2 ptr. t

User sp eq2 text

(Free-form text)

Exit wizard

Exit

Special Calc.

wizard

“Multi-view” Wizard Map

Page 10.27

Chapter 10 Configuring your instrument by using wizards

10.19 Analogue outputs wizard

Setup wizard

Analogue Outputs

'b' key

Edit Analog output 1?

"Yes"

"No"

Yes

Edit Analog output 2?

"Yes" "Yes"

Yes

"No"

etc.

Edit Analog output 8?

Yes

Exit

wizard

n=1

Note

'n' is the number of the mA output being configured

n=2 n=8

mA output n source

mA n param. val. @100%

mA n param. val. @ 0%

Analogue output n type

(Selection)

0 - 20mA input

4 - 20mA input

mA output n filter

(Selection)

Note

This prompt needs the input of a location identifier e.g. 0450

Note

This sequence is identical for each analogue output.

Page 10.28

Normal

Averaging

Oversampling

mA output n value

Return to the next "edit"

prompt OR exit wizard if

there are no more prompts

“Analogue outputs” Wizard Map

10.20 Alarms wizard

Setup wizard

Alarms

'b' key

Edit X User Alarm: Y

A B

"X"

User alarm X ptr.

"B"

"A"

"Y"

User alarm Y ptr.

Chapter 10 Configuring your instrument by using wizards

Comp alarm A ptr1

Comp alarm B ptr1

User alarm X low lmt

User alarm X hi lmt

User alarm Y low lmt

User alarm Y hi lmt

“Alarms” Wizard Map

Exit

wizard

Comp alarm A ptr2

Comp alarm A limit

Comp alarm B ptr2

Comp alarm B limit

Page 10.29

Chapter 10 Configuring your instrument by using wizards

10.21 Multi-view wizard

Setup wizard

Multi view

'b' key

Multiview text width

Mv page1 line1 text

Mv page1 line1 ptr

Mv page1 line2 text

Mv page1 line2 ptr

Mv page1 line3 text

Mv page1 line3 ptr

Mv page1 line4 text

Mv page1 line4 ptr

Default value is 10

Default value is "Density"

Default data is Prime Base Density

Default value is "Temp"

Default data is Line temperature

Default value is "Pressure"

Default data is Line pressure

Default value is "Mass rate"

Default data is Mass rate

Page 10.30

Exit Wizard

“Multi-view” Wizard Map

10.22 Full Setup

This wizard consists of multiple wizards.

Chapter 10 Configuring your instrument by using wizards

Setup wizard

Full Setup

'b' key

Edit Line density ?

Yes

"No"

Edit Base density ?

Yes

"No"

Edit Specific gravity ?

Yes

"No"

Edit Temperature ?

Yes

"No"

Edit Pressure?

Yes

"No"

Edit Energy ?

Yes

"No"

Edit Transmitters ?

Yes

"No"

Edit Special equations ?

Yes

"No"

"Yes"

Route detours to the "Line density" wizard sequence before continuing from here.

Route detours to the "Base density" wizard sequence before continuing from here.

Route detours to the "Specific gravity" wizard sequence before continuing from here.

Route detours to the "Temperature" wizard sequence before continuing from here.

Route detours to the "Pressure" wizard sequence before continuing from here.

Route detours to the "Transmitter" wizard sequence before continuing from here.

Route detours to the "Special Calc." wizard sequence before continuing from here.

Edit Analog outputs?

Yes

"No"

Edit User Alarms ?

Yes

"No"

Edit Multi-view?

Yes

"No"

Exit wizard

Energy selection?

AGA 5

mA input

Live CO2 value

Live N2 value

SG Prime value

"AGA 5"

Note

'n' is the number of the input channel selected earlier

"Yes"

Route detours to the "Analog outputs" wizard sequence before continuing from here.

Route detours to the "Alarms" wizard sequence before continuing from here.

Route detours to the "Multi-view" wizard sequence before continuing from here.

"mA input"

Energy type selector

(Selection)

Mass

Volume

Live energy input

(Selection)

mA input 1

etc.

mA input 10

Live energy @100%

Live energy @ 0%

Analogue input n type

(Selection)

PT100 input

0 - 20mA input

4 - 20mA input

Input channel n

Page 10.31

Chapter 10 Configuring your instrument by using wizards

Page 10.32

11. Configuring by using the menus

The recommended way of configuring the 795x is by using wizards, as e xplained in Chapter 10. But you should use the methods given here if:

• You want to configure an installation which is very different from the examples sho wn in Chapter 10.

• You want to change only a part of an existing configuration, irrespective of how it was configured in

the first place.

• You are experienced in using the 795x menus.

11.1 What does configuration involve?

After you have installed the instrument and made sure that it is working, you must tell it:

• What inputs the field transmitters are connected to.

• How input data is to be processed.

• How results are to be output.

There is a default configuration which covers a general application. Ho wever, it is usually necess ary to edit this configuration to suit particular needs.

Chapter 11 Configuring by using the menus

11.2 Before you start

Before you begin configuring you must obtain the calibration certificates for all the field transmitters connected to the 795x. The diagram on Page 11.4 shows an example of a typical calibration certificate.

If you have followed the installation procedure given in Chapter 5, the instrument is ready to be configured. Otherwise, you must make sure before continuing that:

• The dip switches for the analogue inputs are set as explained in Ch apter 5.

• All instrumentation has been connected.

• The instrument is powered up.

Page 11.1

Chapter 11 Configuring by using the menus

11.3 Recommended sequence for configuration

It is recommended that you configure items in the following order:

1. Inputs (See Section 11.5).

2. Transducer details (See Section 11.6).

3. Anything else such as Specific Gravity, Energy, Custom Application, Multiview, etc. Do these in the order in which they appear in this chapter. (See Sections 11.7- 11.18).

Item to be configured Calcu lations involved (if any) See Section

Analogue inputs - 11.5 Transducer details - 11.6 Transmitter details Line temperature

Densitometer temperature Atmospheric pressure Live CO2 and N2

Line density Line density

AGA8 density compressibility Normalisation of gas components Nx-19 compressibility Linear interpolation compressibility SGERG compressibility Density referral

Base density Base density

Prime base density

Specific gravity Specific gravity

Prime specific gravity Energy Energy 11.11 Custom application User calculations 1 and 2 11.12 mA outputs mA outputs 11.13 Other parameters - 11.14 Multiview - 11.15

11.7

11.8

11.9

11.10

Page 11.2

11.4 What Sections 11.5- 11.15 tell you

Each section tells you how to configure one parameter. The format of each section is:

• (Where necessary) a statement which tells you what information you must have to configure the parameter.

• (Where necessary) a block diagram showing how the instrument uses information from the transducers (“Live Data”) and information you give it (“Fixed Data”) to calculate the value of the parameter.

• A diagram which shows that part of the menu system which you use to configure the parameter.

Sections 11.14 (Configuring other parameters) and 11.15 (Configuring Multiview) have a slightly different format from the others because of the special nature of the topics they deal with.

The table on page 11.2 lists the items which you can configure and, for each, the calculations (if any) which are involved in obtaining the value of the item.

In the menu diagrams, where an item is shown in brackets, the actual value or setting appears in the menu at that point. For example:

(Value)

(Units) (Live or set)

The display shows the actual value of the parameter. The display shows the actual units. The display shows whether the parameter is LIVE or SET.

Chapter 11 Configuring by using the menus

Page 11.3

Chapter 11 Configuring by using the menus

solartron

78123A GAS DENSITY METER

PRESSURE TESTED TO 375 BAR

DENSITY CALIBRATION FOR NITROGEN AT 20 DEG C

(Based on Pressure-Temperature-Density Data in IUPAC tables)

DENSITY [KG/M3]

n nnn.nnn

nn nnn.nnn nn nnn.nnn

nn nnn.nnn nnn nnn.nnn nnn nnn.nnn nnn nnn.nnn nnn nnn.nnn nnn nnn.nnn nnn nnn.nnn

PERIODIC TIME

[uS]

DENSITY = K0 + K1.T + K2.T**2

K0 = K1 = K2 =

TEMPERATURE COEFFICIENT DATA

Dt = DI(1 + K18(t-20)) + K19(t-20)

USER GAS OFFSET DATA

Argon/Methane gas mixture over density range 60 to 200 KG/M3

SERIAL NO

CYLINDER NO

AMPLIFIER NO

CALIBRATION DATE

-n.nnnnnE+nn

-n.nnnnnE-nn

n.nnnnnE-nn

K18 = K19 =

-n.nnnE-nn n.nnnE-nn

: nnnnnn : : :

Page 11.4

DA = Dt (1 + ------- (0.00236 - -----))

(K3( G))

K3 = nnn K4 = nnn.n

( (Dt+K4) ( t+273))

where

T = Periodic time (uS)

DA = Actual Density (KG/M3)

t = Temperature (DEG.C)

DI = Indicated Density (KG/M3)

Gas Specific Gravity

G = -----------------------

Ratio of Specific Heats

Dt = Temp. Corrected Density (KG/M3)

TESTER

Ref No:- xxnnnn/Vn.n

DATE : xxxxxxx

Figure 11.1 An example of a Calibration Certificate for a 7812 gas density transducer

11.5 Configuring analogue inputs

From Configure option on Main Menu

Chapter 11 Configuring by using the menus

Transducer details

Wizards

Analogue inputs

Flowmeter details

b c d

Analogue input 1

Analogue input 3 Analogue input 4

Analogue input 5

Analogue input 7 Analogue input 8

Analogue input 9

b c d

GAS_008.CDR Menu structure for configuringanalogue inputs

Figure 11.2 Menu structure for configuring analogue inputs

Value

Input type

Average

b c d

Page 11.5

Micro Motion Signal Converter With Gas Sotware - Model 7951 Manuals & Guides

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

1. About this manual

1.1 What this manual tells you

1.2 Who should use this manual

1.3 Software version covered by this manual

3.1 Background

3.2 What the 7951 Dual Channel Gas Signal Converter does

3.3 Physical description of the 7951

3.4 Communications

3.5 Typical installations

3.6 Checking your software version

4. What you can connect to a 7951

5. Installing the system

5.1 What this chapter tells you

5.2 Hazardous and non-hazardous environments

5.3 Installation procedure

5.4 Step 1: Drawing up a wiring schedule

5.5 Step 2: Unpacking the instrument

5.6 Step 3: Setting DIP-switches

5.6.1 Analogue Input DP-switches

5.6.2 Turbine Voltage Selection switches

5.7 Step 4: Fitting the 7951

5.8 Step 5: Making the external connections

5.9 Step 6: Earthing the instrument

5.10 Step 7: Connecting the power supply

6. The keyboard, display and indicators

6.1 What this chapter tells you

6.2 The layout of the front panel

6.3 What the display shows

6.4 How the buttons work

6.5 Using the buttons to move around the menus

6.6 Using the buttons to view stored data

6.7 Using the buttons to edit information

6.7.1 Text editing

6.7.2 Multiple-choice option selection

6.7.3 Numerical editing

6.7.4 Date and time editing

6.8 The 795x character set

6.9 LED indicators

6.10 Summary of button functions

7. The menu system

7.1 What this chapter tells you

7.2 What the menu system does

7.3 How the menu system works

8. Alarms

8.1 Alarms

8.1.1 Alarm types

8.1.2 Alarm indicators

8.1.3 How alarms are received and stored

8.1.4 Examining the Alarm Status Display and Historical Alarm Log

8.1.5 What the Alarm Status Display tells you

8.1.6 What the entries in the Historical Alarm Log tell you

8.1.7 Clearing all entries in the Historical Alarm Log

8.1.8 Alarm Messages

9. Additional facilities

9.1 What this chapter tells you

9.2 Selecting units and data formats

9.3 Limits

9.4 Fallback values and modes

9.5 Analogue 0% and 100% values

9.6 Live and set data

9.7 Units which the 795x can display

10. Configuring your instrument by using wizards

10.1 What this chapter tells you

10.2 Wizards: Configuring the easy way

10.3 Wizard Maps: Conventions used

10.4 Quick-start Guide ( Set-up Wizards )

10.5 Set-up Wizard Selection Map

10.6 Units Wizard Selection Map

10.7 Density 1 application wizard

10.8 Density 2 application wizard

10.9 SG-1 Application Wizard

10.10 SG-2 Application Wizard

10.11 SG-1&2 Application Wizard

10.12 Line density wizard

10.13 Base density wizard