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Panametrics DigitalFlow GM868 - User Manual
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Flow
910-193S Rev. F
Jul 2021
DigitalFlow™ GM868
Panametrics Multipurpos
e Ultrasonic Gas Flowmeter
Service Manual
2
Table of Contents
Main Page
Default Chapter
7
Table of Contents
7
Chapter 1. Calibration
11
Introduction
11
Menu Map
11
Calibrating the Analog Outputs
12
Accessing the Calibration Menu
14
Calibrating the Low End of the Output Range
14
Calibrating the High End of the Output Range
14
Testing the Analog Output Linearity
14
Calibrating the Analog Inputs
16
Accessing the Calibration Menu
17
Alow Option = [F1]
18
Ahigh Option = [F2]
18
Ma Option = [F3]
18
Ma Option = [F4]
18
Calibrating the RTD Inputs
19
Accessing the Calibration Menu
19
Probe Option = [F1]
19
Numer Option = [F2]
19
Testing the Alarm Relays
21
Accessing the Calibration Menu
21
Testing the Totalizer/Frequency Outputs
23
Accessing the Calibration Menu
23
Entering Frequency
23
Entering Pulse Number
24
Chapter 2. Error Codes and Screen Messages
27
Introduction
27
E0: no Error
28
E1: Low Signal
28
E2: Sound Speed Error
28
E3: Velocity Range
28
E4: Signal Quality
29
E5: Amplitude Error
29
E6: Cycle Skip, Accel
29
E7: Analog out Error
29
E8: Temp in
29
E9: Press in
29
E10: Special Input
29
E11: Not Used
29
E12: Not Used
30
E13: over Range
30
E14: Totals Overflow
30
E15: Equation Limit
30
Screen Messages
31
Chapter 3. Diagnostics
33
Introduction
33
Displaying Diagnostic Parameters
33
Diagnostic Record
35
Flowcell Problems
36
Gas Problems
36
Pipe Problems
37
Transducer Problems
37
Chapter 4. Parts Replacement
39
Introduction
39
Fuse Replacement
40
Removing the Printed Circuit Board
41
Replacing the EPROM
42
Installing an Option Card
43
Replacing the LCD Display
44
Installing the Printed Circuit Board
45
Spare Parts
47
Appendix A. Service Record
51
Introduction
51
Data Entry
51
Appendix B. Optional Enclosures
53
Introduction
53
Rack Mount Enclosure
53
Rack Mount Fuse Replacement
54
Rack Mount Option Card Installation
55
Rack Mount EPROM Replacement
55
Rack Mount LCD Display Replacement
57
Rack Mount Printed Circuit Board Replacement
57
Circuit Board Removal
58
Circuit Board Installation
59
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Panametrics DigitalFlow GM868 Specifications
General
Brand
Panametrics
Model
DigitalFlow GM868
Category
Measuring Instruments
Language
English
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