Amprobe 33XR-A Professional-Digital-Multimeter - Manual (Page 12)

6
Peak Hold Measurements
Note: The PEAK function must be calibrated to meet the specifications.
Peak Hold records and stores the positive and negative peak values that occur while
measuring an ac signal. To calibrate the Peak Hold function press the PEAK button
for more than 2 seconds. The display will show CAL when the calibration cycle is
done. Press the PEAK button again for the maximum (P+) and minimum (P-) peak
values for the ac signal being measured. The display will toggle between the P+ and
P- readings each time the PEAK button is pressed. Press the PEAK button for more
than 1 second to exit the PEAK function.
Auto Power Off
Auto Power Off is a battery saving feature that puts the meter into a sleep mode if
the Function/Range Switch has not changed position in the last 30 minutes. To
wake the meter turn it off and then on.
The Auto Power Off feature can be disabled to keep the meter from going to sleep.
This feature is useful when using the MIN MAX mode for extended periods. To
disable the Auto Power Off feature use the following procedure:
1. Set the Function Switch to OFF.
2. Press and hold the MIN MAX button while turning the Function Switch to the
desired function.
3. Continue to press the MIN MAX button until the display finishes this
initialization period and the reading settles.
4. Release the MIN MAX button. The Auto Power Off feature will remain disabled
until the meter is turned off and then on.
Relative Measurements
XWWARNING
To avoid erroneous readings, do not change the position of the
Function/Range Switch while the REL function is enabled.
The Relative mode displays the difference between the actual reading and a
reference value. It may be used with any function or range. To make a relative
measurement establish a reference value by measuring a value and then pressing
the REL button after the reading has stabilized. This stores the measured value as
the reference and sets the display to zero. The meter subtracts the reference value
from subsequent measurements and displays this difference as the relative value.
Measurement values greater than the reference value will be positive and values
less than the reference value will be negative.
To exit the Relative Mode, Press and hold the REL button for 2 seconds.
HOLD Measurements
XWWARNING
To avoid erroneous readings, do not change the position of the
Function/Range Switch while the HOLD function is enabled.
The HOLD button causes the meter to capture and continuously display a
measurement reading. To use the HOLD feature make a measurement, and then,
after the reading has stabilized, momentarily press the HOLD button. You can
remove the test leads and the reading will remain on the display. Pressing the
HOLD button again releases the display.