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Model CTF878 Service Manual

Chapter 4.

4.1.3

Displaying Diagnostic Parameters

As part of its measurement menu, the CTF878 offers a list of diagnostic parameters to aid in troubleshooting in the

event of flowcell, transducer, or electrical problems. You can select any diagnostic parameter for display as a

measurement (see

Displaying and Configuring Data, Chapter 2 of the Programming Manual or Chapter 4 of the

Startup Guide). Table 4 below shows all the available diagnostic parameters and ranges.

Diagnostic

Parameter

Displays

Good

Bad

Carrier

Amplitude

The peak voltage amplitude (millivolts) of the

upstream channel received signal before

demodulation.

75–1100mV

< 75mV or

> 1100mV

Carrier

Amplitude

The peak voltage amplitude (millivolts) of the

downstream channel received signal before

demodulation.

75–1100mV

< 75mV or

> 1100mV

Carrier Gain

The gain of the variable stage of the upstream

channel received signal.

–6 to +31dB

---

Carrier Gain

The gain of the variable stage of the

downstream channel received signal.

–6 to +31dB

---

I Amplitude

The RMS voltage amplitude (millivolts) of the

upstream channel demodulated signal I*.

295–1180mV

< 295mV or

> 1180mV

I Amplitude

The RMS voltage amplitude (millivolts) of the

downstream channel demodulated signal I*.

295–1180mV

< 295mV or

> 1180mV

Q Amplitude

The RMS voltage amplitude (millivolts) of the

upstream channel demodulated signal Q*.

295–1180mV

< 295mV or

> 1180mV

Q Amplitude

The RMS voltage amplitude (millivolts) of the

downstream channel demodulated signal Q*. 295–1180mV

< 295mV or

> 1180mV

Modulation

Gain Up

The gain of the variable stage of the upstream

channel demodulated signals I and Q*.

–16 to +31dB

---

Modulation

Gain Dn

The gain of the variable stage of downstream

channel demodulated signals I and Q*.

–16 to +31dB

---

Tau

The time it takes for fluids to move from the

upstream channel to the downstream

channel.

N/A

Correlation

SNR

The Correlation Signal–to–Noise Ratio.

> 10

< 10

* Signals I and Q are those modulated carrier waves which have been converted (demodulated)

into a current equivalent to the original signal.

Содержание CTF878

Страница 1: ...panametrics com Flow 910 254S Rev A AUG 2021 Model CTF878 Clamp On Tag Flowmeter Service Manual...

Страница 2: ......

Страница 3: ...ontains 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 Mod...

Страница 4: ...ii no content intended for this page...

Страница 5: ...ties 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 P...

Страница 6: ...Warranty iv Model CTF878 Service Manual no content intended for this page...

Страница 7: ...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 Chapt...

Страница 8: ...Contents vi Model name Manual Type...

Страница 9: ...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 Serv...

Страница 10: ...e 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 Operat...

Страница 11: ...ars 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 Reve...

Страница 12: ...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 wind...

Страница 13: ...ng 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 numer...

Страница 14: ...ncludes 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 scree...

Страница 15: ...inue 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 patt...

Страница 16: ...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...

Страница 17: ...ll 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...

Страница 18: ...Chapter 1 8 Model CTF878 Service Manual no content intended for this page...

Страница 19: ...en 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 opt...

Страница 20: ...ost 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 P...

Страница 21: ...78 in Flash Update mode 2 Selecting the loading interface 3 Loading the new software from the PC into the CTF878 CAUTION To guard against mishap you should print out download or otherwise record all l...

Страница 22: ...must be disconnected before proceeding 2 Open the enclosure remove the main aluminum shroud and locate the J13 header connector above the display connector on the main board see Figure 11 below 3 Rem...

Страница 23: ...minal window Note If this is the first time that Hyperterminal has been launched a Location Information window will pop up see Figure 12 below Enter any area code and then click OK Figure 12 Location...

Страница 24: ...lected here as an example Figure 14 Connect To Window 4 The Communication Port Properties window appears Enter the settings shown in Figure 15 below Click OK Figure 15 Communication Port Properties Wi...

Страница 25: ...e 17 Flash Update Option 1 As shown in Figure 17 above the Flash Update option erases all instrument coding Press F2 Cancel to return to Operate Mode without erasing the program Press F3 OK to confirm...

Страница 26: ...2 No or ESC on the keyboard to stop the reloading procedure 4 If you chose to reload flash a message appears as in Figure 19 below On the PC in the Hyperterminal Window select the Send File entry unde...

Страница 27: ...ice Manual 17 Chapter 2 Figure 20 Send File Window 6 From the protocol drop down menu select Xmodem The software update now begins as the Xmodem file send appears see Figure 21 below Figure 21 Xmodem...

Страница 28: ...the CTF878 for operation 1 Disconnect the power to the CTF878 WARNING The main power to the CTF878 must be disconnected before proceeding 2 Open the enclosure remove the main aluminum shroud and locat...

Страница 29: ...reen appears similar to Figure 23 below Figure 23 Calibrate Test 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 Whe...

Страница 30: ...ll range When the test is complete the screen returns to Operate Mode Repeat the process to test additional Analog Outputs 3 1 3 2 Calibrating Analog Outputs The Analog Output calibration procedure co...

Страница 31: ...m your entry d Scroll to Calibrate then press ENTER That setpoint has been calibrated 4 Repeat steps 2 and 3 for the other setpoint If you are unsatisfied with the calibration you can reset the inputs...

Страница 32: ...select the Test AnalogIn option for the Analog In to be tested and press ENTER The screen appears as in Figure 26 below It displays the analog input current RAW count from the A D When the input curre...

Страница 33: ...to the Read box and press ENTER b Scroll to the Calibrate box and press ENTER to calibrate the low point 3 The next prompt asks for the value to which you want to set the high input 20 mA a Press ENTE...

Страница 34: ...e desired option for the Digital Output to be verified and press ENTER The screen appears as in Figure 28 below Step through options using the arrow keys Figure 28 Calibrate Digital Outputs Window To...

Страница 35: ...e middle of the screen with the message TESTING IO below it This is followed immediately by a screen similar to Figure 30 below Figure 29 RTD Test Window Note The window shows a count dependent on the...

Страница 36: ...alibrate box and press ENTER The high point has been calibrated 7 If you are unsatisfied with the calibration you can reset the temperatures to factory defaults Press the arrow key to move to the Rese...

Страница 37: ...each EEPROM by observing the information for the corresponding option card When the Test EEPROM information has appeared for every option card present the screen returns to the Operate Mode Site Progr...

Страница 38: ...Chapter 3 28 Model CTF878 Service Manual no content intended for this page...

Страница 39: ...o Cutoff Velocity Averaging Errors Allowed 100 2 10 25 50 5 None 50 Hz 60 Hz Elec System Test Keys Test Screen SNRMin Velocity Min Max Acceleration Carrier Min Max DMod Min Max Watchdog Test AnalogOut...

Страница 40: ...Model CTF878 Service Manual 30...

Страница 41: ...oubt the accuracy of readings for example readings do not agree with other flow measuring devices connected to the same process This section describes error messages and diagnostic parameters and show...

Страница 42: ...ables Switch preamplifiers power jumper to OFF position Power up Contact factory if problem persists E6 Modulation Underrange Error Poor flow conditions See Pipe Fluid Problems on page 34 and Transduc...

Страница 43: ...arrier Gain Dn The gain of the variable stage of the downstream channel received signal 6 to 31dB I Amplitude Up The RMS voltage amplitude millivolts of the upstream channel demodulated signal I 295 1...

Страница 44: ...e meter By far the most common pipe problems are the following 1 The collection of material at the transducer location s Accumulated debris at the transducer location s will interfere with transmissio...

Страница 45: ...me conditions The internal wiring can be corroded or shorted if contaminants enter the transducer housing 5 PHYSICAL DAMAGE Transducers may be physically damaged by dropping them onto a hard surface o...

Страница 46: ...Chapter 4 36 Model CTF878 Service Manual no content intended for this page...

Страница 47: ...circuit breaker The disconnect device must be marked as such clearly visible directly accessible and located within 1 8 m 6 ft of the CTF878 An aluminum shroud over the printed circuit board shields t...

Страница 48: ...e holder cap counterclockwise about 1 4 turn The fuse holder cap with the captive fuse will be ejected from the fuse holder 4 Replace the defective fuse with a new one of the same rating and type Use...

Страница 49: ...nnect the twisted pair backlight cable from connector J6 the two striped ribbon keyboard cables from connector J5 and the white ribbon display cable from connector J7 4 Using a Phillips screwdriver an...

Страница 50: ...inted circuit board Note The fasteners may be discarded as new plastic snap rivets will be provided 4 There are six 32 pin option card sockets J41 J46 on the rear of the printed circuit board To insta...

Страница 51: ...ics console during the maintenance procedure 7 Place the main shroud over the five upper standoffs on the printed circuit board Making sure that the shroud is oriented with the wiring diagram label up...

Страница 52: ...ut washer sets that secure the display shroud to the inside of the console cover Lift the display shroud off its mounting studs 4 Using a 1 4 nutdriver remove the four standoffs that secure the LCD di...

Страница 53: ...8 at the time of purchase Table 2 Spare Parts List Part Number Description 703 1127 02 Option Card Alarms Hermetically Sealed 703 1127 03 Option Card Alarms General Purpose 703 1144 02 Option Card Tot...

Страница 54: ...Chapter 5 44 Model CTF878 Service Manual no content intended for this page...

Страница 55: ...232 C T S R D T R X T X N R T TB1 UP TX1 RX1 X D C R S STREAM RX2 TX2 STREAM DN ANALOG OUT 1 1 1 1 1 9 8 8 8 8 1 4 1 RCV 3 TWIND 5 RWIND 7 GATE 9 ARTN 11 RI_PK 13 R1_I 15 R1_Q 2 ARTN 4 6 DRTN 8 DRTN 1...

Страница 56: ...protect cables Main Aluminum Shroud w 5 mounting screws Shroud Label Option Card Labels Standoffs 7pl Cable Clamps Keypad Cables Display Cable Backlight Cable Main PCBoard Option Cards Detail C Displa...

Страница 57: ...eter the details of the service should be recorded in this appendix An accurate service history of the meter can prove very helpful in troubleshooting any future problems A 1 2 Data Entry Record compl...

Страница 58: ...Appendix A 48 Doc Tittle Manual Type Date Description of Service Performed By...

Страница 59: ...Doc Tittle Manual Type 49 Appendix A Date Description of Service Performed By...

Страница 60: ...Appendix A 50 Doc Tittle Manual Type no content intended for this page...

Страница 61: ...ion 15 Fuse Holder 38 Rating 38 Replacing 38 Size 38 Type 38 G Gas Contamination 34 Physical Requirements 34 Problems 34 Guides Option Card 40 L LCD Display 42 LVD Statement 37 O Option Card Bracket 4...

Страница 62: ...Index 52 Doc Tittle Manual Type Troubleshooting 31 Error Messages 31 V Velocity Averaging 2 Limits 3 W Watchdog Test 7 Z Zero Cutoff 2...

Страница 63: ...the CTF878 Ultrasonic Flowmeter to which this declaration relates are in conformity with the following standards EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995...

Страница 64: ...F878 Ultrasonic Flowmeter r latif cette d claration sont en conformit avec les documents suivants EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995 Overvoltage Cat...

Страница 65: ...er Verantwortung da die Produkte CTF878 Ultrasonic Flowmeter folgende Normen erf llen EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995 Overvoltage Category II Pol...

Страница 66: ......

Страница 67: ...t and company names are trademarks of their respective holders 910 254S Rev A Customer Support Centers U S A The Boston Center 1100 Technology Park Drive Billerica MA 01821 U S A Tel 800 833 9438 toll...

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