Martel Electronics BetaGauge 3II - Manual (Page 45)

Basic Operations 3-10
Zeroing DC Modules
The BetaGauge II has two different zeroing procedures
for DC modules, depending on the type of electrical
signal to be measured: Volts or milliamps.
Zeroing the Volts Input
Use the following procedure to zero the Volts input on
the DC module:
1. Install the module in either module bay (channel)
of the BetaGauge II.
2. Ensure that the BetaGauge II is on.
3. Install the dual banana jack on the test leads into
the positive Volts jack and the common jack.
4. Clip the alligator clips together. This process shorts
the positive Volts jack to the common jack of the
DC module.
5. Ensure that the BetaGauge II is displaying the first
four Setup menu items (Trip, Unit, Damp, and
V/mA).
NOTE: Only this menu display allows for both
channel selection and ZERO key operation.
6. Press the channel select key corresponding to the
module bay where the DC module is installed
(CH1 for the left side, or CH2 for the right side).
7. Press the ZERO key.
8. The Volts display should now be zeroed.
NOTE: The Volts display may drift slightly from
zero in the first few minutes after initial power up.
If so, press the ZERO key again while the
appropriate channel is still selected.