METRON QA-90, User & Service Manual

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5-14
b. Select Automatic in Test Mode (F5) . Press START (F4) .
QA-90 will then commence an automated sequence test.
c. When the test is completed the following Test Results Win-
dow appears.
---TEST FAILED--- F7
Print Test Results ....................> F6
Print Failed Results ..................> F5
SHOW TEST SHOW FAILED STORE MAIN MENU
F1 F2 F3 F4
d. Press Print test results (F6) . Check the printout for legibili-
ty. Then, press Print failed results (F5) . Check the printout
for legibility.
5.5 Calibration Constants
1. SP/VMDL U-constant . Adjusts the voltage measurement for
Supply Voltage and Voltage Measurement Dual Lead. When the
parameter value increases, the measurement value decreases. Ca-
librates at 200 - 230 V alternating voltage. This is best done at
Dual Lead. Measure with AC voltage with polarity changed. Add
the measurements to get the average and calculate the correct
constant.
2. PEIRMDL U-constant . Adjust the voltage measurement for
Protective Earth and Resistance Measurement Dual Lead. When
the parameter value increases, the measurement value decreases.
This value does not usually change. The default value is 84.30.
3. IR U-constant . Adjust the resistance measurement for insulating
resistance. When the parameter value increases, the measurement
value increases. The calibration occurs with a calibrating resis-
tance of 90 - 110 m
Ω
. Ensure the power of 500 V is set correctly,
and that the QA-90 has reached its operating temperature.
4. General I-constant . Adjust the current measurement for PLC,
ALC, MAP, EnLC, ELC, CMDL and the IR tests. When the pa-
rameter value increases, the measurement value decreases. The
IMPORTANT
ENSURE THAT YOU SAVE THE CALIBRATION CONSTANTS
TO FLASH.