Panametrics CTF878 User manual

panametrics.com
Flow
910-254S Rev. A
AUG 2021
Model CTF878
Clamp-On Tag Flowmeter
Service Manual

Flow
panametrics.com
Copyright 2021 Baker Hughes company.
This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries
in one or more countries. All third-party product and company names are trademarks of their respective
holders.
Model CTF878
Clamp-On Tag Flowmeter
Service Manual
910-254S Rev. A
AUG 2021

ii
[no content intended for this page]

Model CTF878 Service Manual iii
Warranty
Warranty
Each instrument manufactured by Panametrics Sensing, Inc. is warranted to be free from defects in material and
workmanship. Liability under this warranty is limited to restoring the instrument to normal operation or replacing the
instrument, at the sole discretion of Panametrics. Fuses and batteries are specifically excluded from any liability. This
warranty is effective from the date of delivery to the original purchaser. If Panametrics determines that the
equipment was defective, the warranty period is:
•one year for general electronic failures of the instrument
•one year for mechanical failures of the sensor
If Panametrics determines that the equipment was damaged by misuse, improper installation, the use of
unauthorized replacement parts, or operating conditions outside the guidelines specified by Panametrics, the repairs
are not covered under this warranty.
The warranties set forth herein are exclusive and are in lieu of all other warranties whether
statutory, express or implied (including warranties of merchantability and fitness for a particular
purpose, and warranties arising from course of dealing or usage or trade).
Return Policy
If a Panametrics Sensing, Inc. instrument malfunctions within the warranty period, the following procedure must be
completed:
1. Notify Panametrics Sensing, Inc., giving full details of the problem, and provide the model number and serial
number of the instrument. If the nature of the problem indicates the need for factory service, Panametrics
Infrastructure Sensing, Inc. will issue a RETURN AUTHORIZATION number (RA), and shipping instructions for the
return of the instrument to a service center will be provided.
2. If Panametrics instructs you to send your instrument to a service center, it must be shipped prepaid to the
authorized repair station indicated in the shipping instructions.
3. Upon receipt, Panametrics will evaluate the instrument to determine the cause of the malfunction.
Then, one of the following courses of action will then be taken:
•If the damage is covered under the terms of the warranty, the instrument will be repaired at no cost to the owner
and returned.
•If Panametrics determines that the damage is not covered under the terms of the warranty, or if the warranty has
expired, an estimate for the cost of the repairs at standard rates will be provided. Upon receipt of the owner’s
approval to proceed, the instrument will be repaired and returned.

Warranty
iv Model CTF878 Service Manual
[no content intended for this page]

<Model name> <Manual Type> v
Contents
Chapter 1.
1.1 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1
1.1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1
1.1.2 Entering the Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1
1.1.3 Displaying Diagnostic Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
1.1.4 Signal Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1.5 Setting Error Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.6 The Test Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2.
2.1 Resetting and Updating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.2 Entering the Service Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.3 Resetting to Factory Default Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.4 Updating CTF878 Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 3.
3.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.2 Entering the Calibration/Test Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.3 Testing and Calibrating Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.4 Testing and Calibrating Analog Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.1.5 Testing and Calibrating Digital Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.1.6 Testing and Calibrating RTD’s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.1.7 Testing EEPROM’s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Chapter 4.
4.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.1.2 Error Code Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.1.3 Displaying Diagnostic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1.4 Pipe/Fluid Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.1.5 Transducer Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Chapter 5.
5.1 Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.1.2 Replacing the Fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
5.1.3 Removing the Printed Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1.4 Installing an Option Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
5.1.5 Installing the Printed Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.1.6 Replacing the LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.1.7 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Appendix A.
A.1 Service Record. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
A.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
A.1.2 Data Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Contents
vi <Model name> <Manual Type>

Model CTF878 Service Manual -1
Chapter 1.
Chapter 1.
1.1 Diagnostics
1.1.1 Introduction
For convenience, the CTF878 offers a Service Menu (see the Service Menu Map , Figure 3-10 on page 3-11). This menu
enables the user to perform a variety of functions that might occasionally be required. Those covered in this chapter
include:
• run diagnostics
• set up signal and data processing parameters
• define error limits
• test the CTF878 screen and keys
• diagnose setup problems
1.1.2 Entering the Service Menu
To enter the Service Menu, press the [MENU] key at the lower right of the CTF878 keypad. The Menu Bar replaces the
Status Bar at the top of the screen. Press the [] arrow key to scroll from the Site Menu to the Service Menu. At the
Service Menu, press [ENTER]. The screen appears similar to Figure 1 below.
Figure 1: Service Menu
To scroll to a particular option, press the [] or [] arrow keys until you reach the option. Then press [ENTER] to
open the option window.
When entering parameters in an option, press:
• the [] key to step through the available parameters.
• the [] key to scroll back to a previously entered parameter.
• the [F2] key (Cancel) or the [ESC] key to exit an option at any time and return to Operate Mode without changing
the parameters.
Units
Test
Site Program Meter Logging
Signal Setup
Error Limits
Test
Factory Defaults
Flash Update
Calibrate/Test
Test EEProm
34
050 100
15.38
Service
Diagnostics
Velocity, m/s
Corr SNR

Chapter 1.
0 Model CTF878 Service Manual
1.1.3 Displaying Diagnostic Parameters
The Diagnostics option enables you to view current diagnostic parameters without having to open a display window
in Operate Mode. To enter the option, scroll to the Diagnostics entry on the Service Menu and press [ENTER]. The
screen appears similar to
Figure 2 below.
Figure 2: Diagnostics Tests Window
Press [F2] (Cancel) or [F3] (OK) to close the window and return to Operate Mode.
Note: For an explanation of diagnostic parameters, refer to
Chapter 4,
Troubleshooting.
OKCancel
Meter Error 0x0004
Carr A
Carr G
I A
Q A
Mod G
TAU
Corr SNR
Up
1000
9.72
390
680
–3.13
19.25
34
–4.65
992
7.26
487
586
Down
Diagnostic Tests

Model CTF878 Service Manual 1
Chapter 1.
1.1.4 Signal Setup
The Signal Setup option enables you to set parameters that affect the flowmeter’s signal processing and outputs:
• Zero Cutoff
• Velocity Averaging
• Errors Allowed
To enter the option, scroll to the Signal Setup entry on the Service Menu and press [ENTER]. The screen appears
similar to Figure 3 below.
Figure 3: Signal Parameter Window
1.1.4.1 Setting Up Signal Parameters
1. Press the [] arrow key to enter the window.
2. The first prompt allows you to select or not select Reverse Flow.
a. Press [ENTER] to select Reverse Flow, and press the [] arrow key to enter the next prompt, or
b. Press [ENTER] again to deselect Reverse Flow, and press the [] arrow key to enter the next prompt.
AgcMgc CCorr Avg LP Filter
.5Zero Cutoff m/s
OKCancel
Velocity Averaging
Errors Allowed 2
None
Reverse Flow
Signal Setup
Signal

Chapter 1.
2 Model CTF878 Service Manual
3. he next prompt asks for the Zero Cutoff. Near “zero” flow, the CTF878 may have fluctuating readings due to
insufficient flow information. The zero cutoff causes velocity measurements less than the cutoff to be reported as
zero. To set the cutoff:
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press [ENTER] to confirm your entry.
d. Press the [] arrow key to enter the next prompt.
4. The next prompt asks for Velocity Averaging.
a. Press [ENTER] to open the drop-down list (from 2 to 100).
b. Use the [] or [] arrow keys to scroll to the desired number of velocity measurements to average
together to smooth out noise in the system.
c. Press [ENTER] to confirm your selection.
d. Press the [] arrow key to enter the next prompt.
5. The final prompt, Errors Allowed, specifies the number of errors the meter can record before displaying an error
message. (The default is 2.)
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press [ENTER] to confirm your entry.
You have finished entering data in the Signal Parameter window. To leave this window,
• Press the [] key to return to the Signal Parameter tab, and the [] arrow key to move to the other tabs. When
the desired tab is highlighted, press [ENTER] to view its contents.
• Or, press [F2] (Cancel) to return to Operate Mode without confirming the changes.
• Or, press [F3] (OK) to confirm the new data. The CTF878 returns to Operate Mode.
IMPORTANT: Do not change the remaining Signal Setup options:
AgcMgc - Automatic or Manual Gain Control
CCorr Avg - Cross Correlation Average
LP Filter - Low Pass (Digital) Filter
They should be set up only by field service engineers.
1.1.5 Setting Error Limits
The Error Limits option enables you to set limits for the signals received from the transducers and the limits for some
outputs. When the parameter falls outside the programmed limits, an error indication appears. To enter this option,
scroll to the Error Limits entry on the Service Menu and press [ENTER]. The screen appears similar to
Figure 4 below.

Model CTF878 Service Manual 3
Chapter 1.
Figure 4: Signal Error Limits Option
1. The first prompt asks for the minimum error limit for the correlation signal-to-noise ratio (SNR) calculated by the
CTF878. The default value is 10. The E8: SNR error message appears if the SNR falls below the limit programmed
here.
IMPORTANT: SNR Min should be changed from factory default settings only if absolutely necessary. These settings
may be changed by qualified field service engineers, only.
To enter the minimum SNR:
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press [ENTER] to confirm your entry.
d. Press the [] or [] key to move to the next limit.
2. The next prompt calls for the low and high velocity limits. The
E9: VELOCITY RANGE error message appears if the velocity falls outside these limits. Repeat Step 1 above to enter
the desired limits.
3. The next prompt asks for the acceleration limit for detecting erroneous velocity outputs. The E10: ACCELERATION
ERROR message appears if the velocity changes by more than this limit from one reading to the next.
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the acceleration limit.
c. Press [ENTER] to confirm your entry.
Note: In the velocity and acceleration boxes, if the CTF878 currently displays metric measurements, the F1 softkey
displays the word “English.” If it displays English measurements, the F1 softkey displays “Metric.” Press
[F1] to
display the measurement in the alternate format.
4. The last four prompts ask for the minimum and maximum values in millivolts for the Carrier and DMod
categories.
IMPORTANT: Carrier and DMod should be changed from factory default settings only if absolutely necessary. These
settings may be changed by qualified field service engineers, only.
To change the Carrier and/or DMod settings:
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired voltage.
c. Press [ENTER] to confirm your entry.
Min Max
OKCancel
SNR Min
–100Velocity m/s100
15Acceleration m/s
75Carrier mV1200
75DMod mV1500
Signal Error Limits
10

Chapter 1.
4 Model CTF878 Service Manual
You have completed entering signal error limits.
• Press [F2] (Cancel) to return to Operate Mode without confirming the error limits, or
• Press [F3] (OK) to confirm the new limits and return to Operate Mode.
1.1.6 The Test Option
Within the Service Menu, the Test option includes three tests to ensure that the CTF878 is performing properly: Test
Screen, Test Keys and Watchdog Test. To enter this option, scroll to the Test entry on the Service Menu and press
[ENTER]. The screen appears similar to Figure 5 below.
Figure 5: Test Option under Service Menu
Scroll to the desired entry in the option menu and press [ENTER].
Units
Test
Diagnostics
Site Program Meter Logging
Signal Setup
Error Limits
Test Keys
Watchdog Test
34
0 50 100
19.25
Service
TAU, ms
Test
Test Screen
Corr SNR

Model CTF878 Service Manual 5
Chapter 1.
1.1.6.1 Testing the Screen
To test the proper functioning of the CTF878 screen, scroll to the Test Screen option in the Test Menu and press
[ENTER]. The screen then shows the message, “Press Any Key To Continue.” Once you press a key, a screen with a
checkerboard pattern appears, as in Figure 6 below.
Figure 6: A Functioning Test Screen
Pressing a key two more times should result in two more checkerboard patterns, followed by a series of dark and light
screens. Pressing the key through this sequence should return the CTF878 to Operate Mode. If the test does not
proceed according to this sequence, please consult the factory.
Press Any Key to Continue

Chapter 1.
6 Model CTF878 Service Manual
1.1.6.2 Testing the Keys
The Test Keys option checks the functioning of the various keys on the keypad. To start the test, scroll to the Test Keys
option on the Test Menu and press [ENTER]. The screen appears similar to Figure 7 below. Press any key on the
keypad, and a cell representing that key should darken.
Figure 7: The Test Keys Window
Pressing the [F3] key returns the meter to the Operate Mode. If any key does not appear on the screen, contact the
factory.
Exit
7
4
1
5
0
8
2
6
-
9
3
MENU
?


ESC SEL
F1 F2 F3

Test Keys
,

Model CTF878 Service Manual 7
Chapter 1.
1.1.6.3 Testing the Watchdog Timer Circuit
The CTF878 includes a watchdog timer circuit. If a software error causes the meter to stop responding, this circuit
automatically resets the meter. A properly functioning CTF878 restarts if you run the Watchdog Test.
To start the Watchdog Test, scroll to the Watchdog Test option in the Test Menu and press [ENTER]. The screen
appears similar to
Figure 8 below.
Figure 8: Watchdog Test Screen
Press [F2] (No) to cancel the test and return to the Menu screen, or press [F3] (Yes) to start the test. The CTF878
should go blank for a few seconds, and then restart. If it does not follow this sequence, consult the factory.
Units
Site Program Meter Logging
*** WARNING ***
This test should automatically
restart your meter!
Press "Yes" to start the test.
Press "No" to cancel the test.
No Yes
Service
Watchdog Test

Chapter 1.
8 Model CTF878 Service Manual
[no content intended for this page]

Model CTF878 Service Manual 9
Chapter 2.
Chapter 2.
2.1 Resetting and Updating
2.1.1 Introduction
For user convenience, the CTF878 offers a Service Menu. This menu enables users to perform a variety of functions
that they might occasionally require. Those covered in this chapter include:
• return to factory default parameters
• load updated versions of the meter program into the CTF878
2.1.2 Entering the Service Menu
To enter the Service Menu, press the [MENU] key at the lower right of the CTF878 keypad. The Menu Bar replaces the
Status Bar at the top of the screen. Press the [] arrow key to scroll from the Site Menu to the Service Menu. At the
Service Menu, press [ENTER]. The screen appears similar to Figure 9 below.
Figure 9: Service Menu
To scroll to a particular option, press the [] or [] arrow keys until you reach the option. Then press [ENTER] to
open the option window.
When entering parameters in an option, press:
• the [] key to step through the available parameters.
• the [] key to scroll back to a previously entered parameter.
• the [F2] key (Cancel) or the [ESC] key to exit an option at any time and return to Operate Mode without changing
the parameters.
Units
Test
Site Program Meter Logging
Signal Setup
Error Limits
Test
Factory Defaults
Flash Update
Calibrate/Test
Test EEProm
34
050 100
15.38
Service
Diagnostics
Velocity, m/s
Corr SNR

Chapter 2.
10 Model CTF878 Service Manual
2.1.3 Resetting to Factory Default Parameters
For various reasons, you might wish to return the CTF878 to its original settings. The Factory Defaults option enables
you to return the meter to its preprogrammed default settings. To enter the option, scroll down to the Factory Defaults
entry in the Service Menu and press [ENTER]. The screen will appear similar to Figure 10 below.
IMPORTANT: All sites and logs will be lost if you use the Factory Defaults option.
Figure 10: The Factory Defaults Option
1. To restore Factory Default settings:
• Press [F2] (Cancel) to return to Operate Mode without changing the current settings.
• Press [F3] (OK) to confirm that you wish to restore the factory default settings.
2. The program asks for confirmation: “Are you SURE?” Repeat the procedure shown in Step 1 above.
The CTF878 replaces the default site file and the global meter settings with the factory default settings, and returns to
Operate Mode.
Site Program Meter Logging
OK
*** WARNING ***
You will LOSE all changes by
pressing OK.
Choose CANCEL to exit or OK to
proceed.
Cancel
Service
Factory Defaults