4.1 Warm-up and Zero-adjust Operation
37
Chapter 4 Configuring the Instrument before Measurement (SYSTEM - SYSTEM screen)
4
It is necessary to allow the PW3198 to warm up to ensure its ability to make precise measurements.
Allow the instrument to warm up for at least 30 minutes after turning it on. (p.36)
Zero-adjust functionality creates a state in which the input signals are equal to zero in the instrument's
internal circuitry and uses that level as zero. In order to ensure the device's ability to make precise mea-
surements, it is recommended to perform zero adjustment after allowing the instrument to warm up for at
least 30 minutes. Perform zero-adjustment on both voltage and current measurement channels.
Configuring the Instrument
before Measurement
(SYSTEM - SYSTEM screen)
and Wiring Chapter 4
4.1 Warm-up and Zero-adjust Operation
Warm-up
Zero Adjustment
Execute
Cancel
[WIRING]
[SYSTEM] screen
[Zero Adjust]
A confirmation dialog will
be displayed.
• Perform zero adjustment only after plugging the clamp sensor into the instrument.
• Perform zero adjustment before attaching to the lines to be measured (proper adjust-
ment requires the absence of any input voltage or current).
• In order to ensure the instrument's ability to make precise measurements, zero
adjustment should be performed at an ambient temperature level that falls within the
range defined by the device specifications.
• The operating keys are disabled during zero adjustment.
• When the clamp sensor has a zero adjustment function, perform zero adjustment on
the HIOKI PW3198 first before performing it on the clamp sensor.
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