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6. Press Integrate Settings softkey to select whether the measurement integration time will be specified in terms of
Number of Power Line Cycles (NPLC) or directly in seconds (Time). Only 1, 2, 10, 20, 100, and 200 PLC provide
normal mode (line frequency noise) rejection. Selecting 200 PLC provides the best noise rejection and res-
olution, but the slowest measurements.
Softkey
Integrate
NPLC
Time
Advanced Settings
Press Advanced softkey to configure the advanced settings for the measurement.
Softkey
Auto Zero
Off/ On
Low Power
Off/ On
Delay
Auto/ Time
Keysight DAQ970A/DAQ973A User's Guide
Description
Sets the integration time as 0.001, 0.002, 0.006, 0.02, 0.06, 0.2, 1, 2, 10, 20, 100, and 200 Power Line
Cycles (PLC). Only 1 PLC and longer times provide normal mode (line frequency noise) rejection.
Selecting 100 or 200 PLC provides the best noise rejection and resolution.
Directly sets the integration time in seconds.
Description
Auto Zero provides the most accurate measurements, but requires additional measurement time to perform
the zero measurement. With auto zero enabled (
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 accuracy. With auto zero
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 auto zero setting for 4-wire measurements).
Selects the low-power resistance measurement. This sources less current resulting in lower power dis-
sipation, and less self-heating, in the resistance under test. Typically, this is about 1/10th the current
sourced for the standard resistance measurements. The approximate current sourced for each meas-
urement range is shown at the bottom of the resistance range softkeys, for example: (~ 1 mA).
Selects whether the delay between channels in the scan list will be automatically or manually selected. By
Auto , instrument will automatically determine the channel delay based on measurement function,
selecting
range, integration time, and AC filter setting. By selecting
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.
3 Features and Functions
On ), the instrument internally measures the offset following
Time , the specified delay (time in seconds) is
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