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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.
See Table 5.
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