User's Manual

4-9
1010NFM-3J
Section 4
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4.5.1 THE ANALOG OUTPUT TRIM MENU
Analog Output Trim allows you to fine-tune the meter’s analog voltage and current outputs using a
multimeter connected to the output under test. In addition, you can use a frequency counter to fine-tune
the meter’s pulse rate output.
NOTE: The current, voltage, and Pgen trimming will be limited by the 12-bit resolution of the
meter’s D/A Convertor (DAC).
To access the Analog Output Trim menu press
4.5.2 CURRENT OUTPUT TRIM (Io1 & Io2)
(Note: Can be trimmed to within .005 mA of nominal.)
To calibrate a current output (Io1 or Io2):
Set up the multimeter to read Amps, then connect it to the supply and return terminals of the
current output under test.
Move the highlight to the port to be tested, press , then press to move the cursor
to Trim @ 4mA.
Press . This triggers a 4.00 mA pop-up window. The multimeter should now be
reading 4.00 mA.
If the multimeter reading does not match, use the numeric keys to type in the multi-
meter reading.
Press to register setting. This adjusts the meter’s DAC (digital-to-analog converter) so
that a 4mA output corresponds with 4mA on the multimeter.
Re-check the multimeter to make sure that it is now reading 4mA.
4.5.3 VOLTAGE OUTPUT TRIM (Vo1 & Vo2)
(Note: Can be trimmed to within .0025 V of nominal.)
To calibrate a voltage output (Vo1 or Vo2):
Set up the multimeter to read volts, then connect it to the supply and return terminals of the
voltage output under test.
Move the highlight to the port to be tested , press , then press to move
the cursor to Trim @ 2V.
Press . This triggers a 2.00 Volts pop-up window. The multimeter should now be reading
2.00 Volts.
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ANALOG OUTPUT TRIM MENU STRUCTURE
Analog Output Trim Io1 (Io2) Operate
Trim @ 4mA Indicated mA = x.xx
Vo1 (Vo2) Operate
Trim @ 2V Indicated V = x.xx
Pgen1(Pgen2) Operate
Trim @ 1kHz Indicated Hz = xxxx
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