This adjustment should be performed only if components have been replaced and need not be performed on a
routine basis.
Select the 2V range. Apply 1.0000VDC to the input terminals and connect a precision 1.00K .05% resistor to
the ATC connector. Alternately select and deselect the ATC mode. Adjust RV202 for minimum shift in
readings between normal and ATC modes.
8-3-3. 2 Volt Range Adjustment
Select the 2V range and apply +1.0000 volts to the voltage input terminals. Adjust RV203 for a reading of
10000
8-3-4. 200mV Range Adjustment
Select the 200mV range and apply +.10000 volts to the voltage input terminals. Adjust RV204 for a reading
of 1000.0
8-3-5. 20mV Range Adjustment
Select the 20mV range and apply +10.000mV to the voltage input terminals. Adjust RV205 for a reading of
100.00
8-4.
Current Source Calibration
The following procedure should be performed when calibrating the current source section of the 4300B. In all
steps the current source is calibrated to the internal voltmeter therefore the voltmeter calibration of Section 8-3
should be performed before proceding. Alternately, an external voltmeter of greater than ±0.005% accuracy
may be used.
8-4-1. Reference Adjustment
This adjustment should only be performed if components in the reference section have been replaced and need
not be performed on a routine basis. A DC voltmeter with a minimum of ±0.03% accuracy is needed to make
the adjustment.
Connect the voltmeter low lead to 0V (front of R118) and the voltmeter high lead to IC101 pin 5. Adjust
RV101 for 1.0000 volts. Remove the voltmeter leads.
8-4-2. 10 Amp Adjustment
Connect the .1 ohm standard resistor to the 4300B using four-wire connections. Select the 2V and 10A ranges
on the 4300B. Adjust RV102 for a reading of 100.00m
Ω
. Allow extra time for settling in this range. Keep
the cover on as much as possible to ensure proper cooling of components.
8-4-3. 1 Amp Adjustment
Connect the 1 ohm standard resistor to the 4300B using four-wire connections. Select the 2V and 1A ranges.
Adjust RV103 for a reading of 1000.0m
Ω
.
