Amprobe 38XR-A Professional-Digital-Multimeter - Manual (Page 13)

9
Beeper Off
The beeper is an aural indicator to identify when the DMM is performing a function,
making a range change, detecting a limit, and so on. To disable the beeper use the
following procedure:
1. Set the Function Switch to OFF.
2. Press and hold the HOLD button while turning the Function Switch to the
desired function. The no-beep symbol
N
shows on the display.
3. Release the HOLD button. The beeper feature will remain disabled until the
meter is turned off and then on.
Note: To disable both the beeper and Auto Power Off press and hold the REL
button while turning on the DMM.
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 the Function/Range Switch to another position.
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 AVG 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 AVG button while turning the Function Switch
from OFF to the desired function. The SLEEP OFF message shows on the
display.
3. Release the MIN MAX AVG button. The Auto Power Off feature will remain
disabled until the meter is turned off and then on.
Note: To disable both Auto Power Off and the beeper press and hold the REL
button while turning on the DMM.
REL (Relative) Measurements
Note: The REL feature does not work with the dBm or the dutycycle function.
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 first 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
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.