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Users Manual
16
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 high-
voltage 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 and blinks . The Clamp periodically beeps to remind
you that the measurement is not live. When in HOLD mode, if the
Clamp senses a voltage ±30 V or a voltage overload (OL), Z shows
on the display to tell you a hazardous voltage is at the Clamp input.
When in HOLD mode, push e again to resume normal operation
with live readings.
MIN/MAX/AVG Measurements
Min Max Avg mode captures the minimum, maximum, and
average readings of a given output signal over an extended time.
The Clamp beeps when it senses a new high value or new low
value.
This function works in current, voltage, and frequency modes:
1. Push M to enter the Min/Max/Avg mode.
The maximum reading shows on the display.
2. Continue to push M to select between the maximum,
minimum, average, and live readings.
The cycle continues each time you push M.
3. To exit Min/Max/Avg mode, push and hold M for >2 s.
Note
Auto Power Off is always disabled when you use the
Min Max Avg function.
Inrush Current
Inrush Current is surge current that occurs when an electrical
device is first powered on. The Clamp can capture this surge
current reading. Current spikes from motor drives are one example
of such an event. The Inrush function takes samples over a
100 ms period and calculates the starting current envelope.
To measure inrush current:
1. Select the measurement function (ac current, dc current, or
iFlex ac current).
2. Center the Jaw or iFlex Probe around the live wire on the
device.
3. Push I.
Dashes show on the display until the Clamp detects the inrush
current. When the inrush current is detected, the
measurement shows on the display.
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