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Dry-well Calibrator

Troubleshooting Problems, Possible Causes, and Solutions

29

Troubleshooting Problems, Possible Causes, and Solutions

This section contains information on troubleshooting, CE Comments, and a wiring diagram.
In the event that the Product appears to function abnormally, this section may help to find and solve the 
problem. Several possible problem conditions are described along with likely causes and solutions. If a 
problem arises, please read Table 

4

 carefully and attempt to understand and solve the problem. If the 

problem cannot otherwise be solved, contact an Authorized Service Center (see 

Contact Fluke 

Calibration

 for assistance. Be sure to have the model number, serial number, voltage, and problem 

description available.

Table 4. Troubleshooting

Problem

Possible Causes and Solutions

Incorrect
temperature reading

Incorrect R0, ALPHA, and DELTA parameters.

 Find the value for R0, 

ALPHA, and DELTA on the Report of Calibration. Reprogram the 
parameters into the Product (see 

Calibration Parameters

). Allow the 

Product to stabilize and verify the accuracy of the temperature reading.

Controller locked up. 

The controller may have locked up due to a power 

surge or other aberration. Initialize the system by performing the Factory 
Reset Sequence.

Factory Reset Sequence. 

Hold 

SET

 and 

EXIT

 down simultaneously while 

powering up the Product. The Product display shows ‘-init-,‘ the model 
number, and the firmware version. Each of the controller parameters and 
calibration constants must be reprogrammed. The values can be found on 
the Report of Calibration (see 

Calibration Parameters

).

The Product heats or 
cools too quickly or too 
slowly

Incorrect scan and scan rate settings.

 The scan and scan rate settings 

may be set to unwanted values. Check the Scan and Scan Rate settings. 
The scan may be off (if the unit seems to be responding too quickly). The 
scan may be on with the Scan Rate set low (if unit seems to be responding 
too slowly).

Improper line voltage.

 Verify the bottom of the unit matches the source 

voltage.

Unstable display

Wait. 

Allow the Product to stabilize for a few minutes.

Proportional band may be incorrect. 

Refer to the proportional band on 

the Report of Calibration.

Содержание 9102S

Страница 1: ...Well Calibrator User s Guide 2005 Rev 1 4 20 2005 2020 Fluke Corporation All rights reserved Specifications are subject to change without notice All product names are trademarks of their respective c...

Страница 2: ...nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB D...

Страница 3: ...on 5 DC Power Operation 5 Setup 5 Parts and Controls 6 Rear Panel 6 Front Panel 8 Accessories 9 General Operation 10 Set the Temperature 10 Change the Display Units 10 Operation 10 Well Temperature 12...

Страница 4: ...e 20 RS 232 Connection 21 Interface Commands 22 Test Probe Calibration 23 Calibrate a Single Probe 24 Dry well Characteristics 24 Stabilization and Accuracy 24 Calibration and Adjustment Procedure 25...

Страница 5: ...control Eight set point memory Adjustable readout in C or F The temperature is accurately controlled by Fluke Calibration s digital controller The controller uses a precision platinum RTD as a sensor...

Страница 6: ...uct visit http flukecal com register product Safety Information A Warning identifies conditions and procedures that are dangerous to the user A Caution identifies conditions and procedures that can ca...

Страница 7: ...11 Group 1 Class A Group 1 Equipment has intentionally generated and or uses conductively coupled radio frequency energy that is necessary for the internal function of the equipment itself Class A Equ...

Страница 8: ...only For Maintenance and cleaning recommendations see Maintenance Quick Start Make sure to read the dry out period text in the Safety Information that comes with the Product Unpacking Unpack the Produ...

Страница 9: ...olarity as shown in Figure 1 The outside conductor is positive and the inside is negative The ac power switch on the rear panel does not switch the dc power Figure 1 12 V dc Power Source Polarity Setu...

Страница 10: ...Product The switch is either on or off The on position is for normal operation The off position disconnects power to the entire unit Fan The Product has a variable speed fan Under certain circumstanc...

Страница 11: ...Dry well Calibrator Parts and Controls 7 Figure 2 Back Panel...

Страница 12: ...the wells when tipped forward Inspect the strap periodically for wear Well Block Located on the middle of the front panel are the well openings where probes may be inserted into the well The block acc...

Страница 13: ...to store parameters to the displayed value d down arrow Used to decrement the displayed value of parameters u up arrow Used to increment the displayed value EXIT Used to exit a function and to skip to...

Страница 14: ...duct can display temperature in Celsius or Fahrenheit The temperature units are shipped from the factory set to Celsius There are two ways to change to Fahrenheit or back to Celsius 1 Press SET and u...

Страница 15: ...IT SET SET Select Setpoint Adjust Setpoint Units C F Scan On Off Scan Rate Display Temperature Configuration Menu Secondary Functions x 5 HL Adj HL SET EXIT Units C F Set Proportuinal Band Select R0 A...

Страница 16: ...y and adjusting the set point value Programmable Set points The controller stores 8 set point temperatures in memory The set points can be quickly recalled to conveniently set the Product to a previou...

Страница 17: ...t are ignored S Accept new set point value To change temperature units see Change the Display Units Scan The scan rate can be set and enabled so that when the set point is changed the dry well heats o...

Страница 18: ...t is recalculated when the set point temperature is changed The set point resistance is used to perform a calibration adjustment using the Callendar Van Dusen R versus T curve fit see Calibration and...

Страница 19: ...h as this the heater output power is proportional to the well temperature over a limited range of temperatures around the set point This range of temperature is called the proportional band At the bot...

Страница 20: ...he proportional band press u or d 10 0 New proportional band setting To accept the new setting press SET Press EXIT to continue without storing the new value S Accept the new proportional band setting...

Страница 21: ...RS 232 interface parameters menu is indicated by SErL Serial RS 232 interface parameters menu Press SET to enter the menu The serial interface parameters menu contains parameters which determine the...

Страница 22: ...ll duplex any commands received by the Product through the serial interface are immediately echoed or transmitted back to the device of origin With half duplex the commands are executed but not echoed...

Страница 23: ...parameters Hard Cutout R0 ALPHA and DELTA which characterize the resistance temperature relationship of the platinum control sensor These parameters may be adjusted to improve the accuracy of the Pro...

Страница 24: ...of this parameter is set at the factory for best Product accuracy DeLta Flashes for one second and then the DELTA setting displays 0 0000 Current DELTA setting To change the DELTA setting press u or d...

Страница 25: ...l for serial communications is 8 data bits 1 stop bit and no parity Use no flow control Set the linefeed to ON all carriage returns are followed by a linefeed LF ASCII 10 and the duplex to HALF disabl...

Страница 26: ...terminating carriage return CR ASCII 13 is implied with all commands Table 3 Controller Communications Commands Command Description Command Format Command Example Returned Returned Example Acceptable...

Страница 27: ...ff lf eed of f lf of Calibration Menu Read R0 calibration parameter r 0 r0 999 999 r0 100 7 Set R0 calibration parameter to n r 0 n r 100 7 95 0 to 105 0 Read ALPHA calibration parameter al pha al al...

Страница 28: ...such a way as to compensate for nominal heat losses out of the top of the dry well However actual heat losses vary with temperature and the design of the thermometer probes inserted into the Product...

Страница 29: ...just within the most useful operating range of the Product The farther apart the calibration temperatures the greater the calibrated temperature range However the calibration error is also greater ove...

Страница 30: ...SET and d at the same time where T1 and R1 are the measured temperature and set point resistance at 2 0 C T2 and R2 are the measured temperature and set point resistance at 50 0 C T3 and R3 are the me...

Страница 31: ...epeatability Compare the error observed at each calibration point with the Product accuracy specification to determine accuracy performance If the Product is adjusted repeat the calibration procedure...

Страница 32: ...s are wiped clean of any debris loosened in the buffing process Periodic cleaning of the outside of the inserts ensures easy insertion and removal of the inserts from the well Handle the Product with...

Страница 33: ...alibration Parameters Allow the Product to stabilize and verify the accuracy of the temperature reading Controller locked up The controller may have locked up due to a power surge or other aberration...

Страница 34: ...he Product was turned off at high temperatures and reenergized too quickly Turn off the Product until the display is completely off and then reenergize Display flickers when the Product is turned off...

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