74X Series
Calibration Manual
32
1. If mA Source is to be calibrated, mA Measure should be calibrated first. In other
words, re-calibrating
mA Measure could affect mA Source.
2. If
Ohms Measure is to be calibrated, the following sub-routines should be done
first in the order shown:
Volts DC Measure, mA Measure, mA Source, and
Ohms Measure. This means that re-calibrating Volts DC Measure or mA
Measure can have an impact on Ohms Measure
.
3. If
TC Measure is to be calibrated, Volts DC Source must be calibrated first.
Calibrating
Volts DC Source could affect TC Measure.
Note
TC Measure
also characterizes component RT2, which could affect the
TC Source
function (of which there is no calibration sub-routine), and
affects the contrast of the display LCD.
How to Calibrate
Follow these general instructions for all calibrations:
• Operate the UUT on battery power. Make sure the battery is fully charged. Do not
use the battery eliminator (BE9005).
• Allow each item of calibration equipment to satisfy its specified warm-up period.
• Allow the UUT a minimum of 5 minutes to warm up.
• For each calibration, make sure the calibration equipment has settled and that the
"unsettled" annunciator on the UUT is not displayed.
Proceed as follows:
1. Turn on the UUT , press [SETUP] , and then the
Next Page softkey three times.
2. The cursor bar should be at the
Volts DC Measure subroutine. If you want to start
with another subroutine, use the Ù (up) and Ú (down) keys to move the cursor to the
desired subroutine. To start, press the
Calibrate softkey.
3. For
Volts DC Measure, do as the display illustrates: connect a shorting bar across the
right side high and low jacks (not the TC connector), then connect all three lows
(commons) together with two jumpers. Press the
Continue softkey.
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