Measurement Computing 101 Operating Manual page 13

Setting Up the Model 101
Unzeroing the desired channel.
Note: Unzeroing the desired channel sets both autozero DAC's to zero. This basically
sets the amplifier to its natural zero position. The output of the amplifier is offset
by its own offset voltage.
Step 1: Unzero the amplifier
1. Depress the Channel Select Switch for CH1, CH2 or CH3. The appropriate Channel Select
LED will illuminate and stay illuminated.
2. Depress and hold the ZERO Switch (SW4) until the appropriate Channel Select LED
extinguishes. The selected Channel amplifier is unzeroed.
Applying an internal shunt calibration resistor (Rsh) to the selected channel bridge network.
Note: Internal solder jumpers allow for a positive or negative responding Rsh. The shunt
cal resistors are removable and may be installed by the user.
Reference Location of Filter Modules and Rsh Resistor in the following page.
1. Simply depress and hold the Rsh Switch for the desired channel amplifier. The shunt cal
resistor is applied to the appropriate transducer bridge circuit terminals for the duration that
the Rsh Switch is depressed.
Operating Manual Model 101, Revision 1
Turn Input Power Switch OFF before removing power cable from the
instrument. Remove power cable from the instrument before disassembling
any part of the instrument.
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