PROGRAMMING MODULE #9 - SERVICE OPERATIONS
CALIBRATING THE SIGNAL INPUT
The indicator has been fully calibrated at the factory and will only require a
scaling operation
(Pro 1 or 2)
to display the units of the process. If the unit
appears to be indicating incorrectly or inaccurately, refer to the troubleshooting
section 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.
Signal source accuracies of 0.1% or better are required.
The procedure consists of applying accurate signal levels to the indicator in a
series of three steps. Allow a 30-minute warm-up period before starting this
procedure.
Note: Once the access Code (48) has been entered, there is no exiting this
program module without completing the calibration procedure.
ENTER ACCESS CODE
A code number
(48)
must be keyed-in prior to the calibration sequence to
guard against inadvertent entries. Access code numbers other than those listed in
this section, should not be entered at this step. If any are entered, undefined or
unpredictable operation could result.
“CodE” < > “0” to “99”
If the code number for the previous step was not recognized, the indicator
returns to
“Pro 0”
, with no action taken. Otherwise, the calibration procedure is
started.
ENTER ZERO REFERENCE
This can be accomplished by opening 5 AMP input of TBA #5. Allow the
signal to stabilize for 20 seconds before pressing
“P”
.
“StEP 1” (Press “P”)
ENTER 50% OF RANGE
Apply 2.500 AMPS AC to input terminals. Allow signal to stabilize for 20
seconds before pressing
“P”
.
“StEP 2” (Press “P”)
ENTER 100% OF RANGE
Apply 5.000 AMPS AC to input terminals. Allow the signal to stabilize for 20
seconds before pressing
“P”
.
“StEP 3” (Press “P”)
Indicator calibration is complete. It is recommended that calibration be
checked by entering
“Pro 1”
and checking the displayed input values with the
signal source at different applied input levels.
RESTORING ALL PROGRAMMING PARAMETERS BACK TO
FACTORY CONFIGURATION
All of the programming in Modules #1 thru #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”
, and then pressing
“P”
. The IMH
responds by displaying
“INItAL”
for several seconds, and then returns to
“Pro
0”
.
Note: When this procedure is performed, ALL of the scaling, presets, etc. that
were programmed into the IMH will be overwritten.
“CodE” < > “66”
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