393/393 FC
Users Manual
14
Measurement Features
This section is about the Clamp features you can use for measurements.
XW
Warning
To prevent possible electrical shock, fire, or personal injury:
•
Do not use the HOLD function to measure unknown potentials. When HOLD is
turned on, the display does not change when a different potential is measured.
•
Disconnect power and discharge all highvoltage capacitors before you measure
resistance, continuity, capacitance, or a diode junction.
Display Hold
To capture and hold the display reading, push
e
. The display freezes the readings and
H
.
The Product periodically beeps to remind you that the measurement is not live. When in HOLD
mode, if the Product senses a voltage more than ±30 V or a voltage overload (OL),
Z
shows on
the display to tell you a hazardous voltage is at the Product input.
When in HOLD mode, push
e
again to resume normal operation with live readings.
Auto Hold
To capture and hold the display reading automatically:
1. Push
e
>2 s to enable Auto Hold mode.
c
shows on the display to indicate that Auto Mode is enabled. The display will freeze and
blink
H
automatically.
When in Auto Hold mode, the Clamp periodically beeps to remind you that the measurement
is not live. If the Clamp senses a voltage more than
±
30 V or a voltage overload (OL),
Z
shows on the display to tell you a hazardous voltage is at the Clamp input.
When Auto Hold is enabled, the main reading will trigger the hold mode, and the second
reading will not display.
H
stops blinking until the main reading triggers the hold mode.
The display updates when the measured value:
•
exceeds the threshold value (voltage, capacitance, current, dc power)
•
is less than the threshold value (Ohm) and stabilizes within the fluctuation range/delta
value.
