Auto Zero - Autozero provides the most accurate measurements, but requires additional measurement
time to perform the zero measurement. With autozero enabled (On), the instrument internally measures
the offset following each measurement. It then subtracts that measurement from the preceding reading.
This prevents offset voltages present on the instrument’s input circuitry from affecting measurement accur-
acy. With autozero disabled (Off), the instrument measures the offset once and subtracts the offset from all
subsequent measurements. The instrument takes a new offset measurement each time you change the
function, range, or integration time. (There is no autozero setting for 4-wire measurements).
Delay - Selects whether the delay between channels in the scan list will be automatically or manually selec-
ted. By selecting Auto, instrument will automatically determine the channel delay based on measurement
function, range, integration time, and AC filter setting. By selecting Time, the specified delay (time in
seconds) is inserted between the relay closure and the actual measurement on each channel, in addition to
any delay that will implicitly occur due to relay settling time.
Quarter bridge arrangement
This section describes how to configure the selected channel for quarter bridge strain gage measurements
from the front panel.
1.
Connect bridge configuration source to the module's screw terminals.
2. Press [Channel] > Measure, and select STRAIN from the selection menu.
3. Press Range and use the knob or the front panel arrow keys to specify the measurement range. Auto
(autorange) automatically selects the range for the measurement based on the input. Autoranging is
convenient, but it results in slower measurements than using a manual range. Autoranging goes up a
range at 120% of the present range, and down a range below 10% of the present range.
[Channel] Menu Overview
104 Keysight DAQ970A User's Guide
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