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4-7
Section IV – Operating Instructions
NOTE: Knowing what ranges to zero can reduce your procedure time exponentially. For example to
achieve sub-part per million results while calibrating a 10 V source the operator would calibrate fro 10 V to
1 µV. There would really be no need to calibrate the ranges above 10 V or below 1 µV.
4.
Place the AVM-2000 in OPERATE mode.
a.
Press the OPERATE/ZERO button until the 10 M
Ω
appears in the display.
NOTE: 10 M
Ω
is selected because that is the impedance of the Fluke 845 and familiar to most users and
calibration procedures. The user can select the desired impedances at this point. It is important to note
that a separate zero needs to be performed for each impedance as well as range. It is not typical to
changes impedances during a calibration.
5.
Dial the Range -- Rotary Control/Pushbutton to the range on the display changes to 1 µV.
6.
Press the
INPUT OFFSET -- Rotary Control/Pushbutton
until the
(closed padlock) changes to V.
7.
Dial the INPUT OFFSET -- Rotary Control/Pushbutton until zero is attained on the analog display.
8.
Dial the Range -- Rotary Control/Pushbutton changing the range to 3 µV and repeat step 7 and
repeat on every range up to and including 10 V.
