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MODULE #9 - SERVICE OPERATIONS
Theindicator hasbeen fully calibratedat thefactory. Ifthe unitappears to
beindicating incorrectlyor inaccurately,refer tothe troubleshootingsection
before attempting this procedure.
When re-calibration is required (generally every 2 years), this procedure
should only be performed by qualified technicians using appropriate
equipment. Resistance source accuracies of 0.01% or better are required.
Theprocedureconsistsofapplyingaccuratesignallevelstotheindicatorin
a series oftwo steps. Allow a 30 minute warm-up period before startingthis
procedure.
Note: Once the access code has been entered, there is no exiting the program
module without completing the calibration procedure.
ENTER ACCESS CODE
“Code 48” must be keyed-in prior to the calibration sequence to guard
against inadvertent entries. Access code numbers other than those listed in
thissectionshouldnot beenteredatthisstep. Ifanyareentered, undefinedor
unpredictable operation could result.
“CodE” < > “0” to “99”
If the code number for the previous step was not recognized, the indicator
returnsto“Pro0”,withnoactiontaken.Otherwise,thecalibrationprocedure
is started.
ENTER ZERO REFERENCE
Apply 0 ohms to input by shorting Terminals 6 and 7 as
shown in the drawing to the right. Allow to stabilize for 20
seconds before pressing “P”.
“StEP 1” (Press “P”)
APPLY PRECISION RESISTANCE
Connect a precision (0.01%) 5.11 KW resistor across
Terminals 6 and 7.
Allow to stabilize for 20 seconds before pressing “P”.
“StEP 2” (Press “P”)
Indicator calibration is complete. It is recommended that calibration be
checkedbycomparingthedisplayedtemperaturewithaprecisionthermometer.
SERIAL HARDWARE (loop-back) DIAGNOSTICS
The internal serial communications hardware in the IMY can be tested to
verify proper operation. The procedure consists of connecting the Serial
Input (SI), Serial Output (SO), and
20 mA Source into a simple loop,
and then entering an access code.
Connect the IMY as shown at
right. Enter “Pro 9”, key-in “Code
39”,andthenpress“P”.Iftheserial
communication hardware is OK,
“PASS” will be displayed.
Conversely, if there isan internal
problem, “FAIL” will bedisplayed.
Afterthediagnostictestiscomplete,
press “P” to return to “Pro 0”.
“CodE” < > “39”
RESTORING ALL PROGRAMMING PARAMETERS BACK TO
FACTORY CONFIGURATION
All of the programming in Modules #1 through #8 can be restored back to
the factory configuration by entering a specific access code (refer to the
“Factory Configuration” section for the data that will be entered). The
procedure consists of entering “Pro 9”, keying-in “Code 66”, then pressing
“P”. The IMY responds by displaying “INItAL” for several seconds, and
then returns to “Pro 0”.
Note: When this procedureis performed, all of the scaling, presets,etc. that
were programmed into the IMY will be overwritten.
“CodE” < > “66”
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