Extech Instruments MA400 User Manual page 14

Max Hold
1. Press and hold for 1 second the Max Hold key to capture
and hold the maximum measured value (up to 30ms). The
annunciators
2. Press and hold for 1 second the Max Hold key to exit the
mode.
Note: The Max Hold feature applies only to the upper current
display (ACA) on the MA440 and MA460+ double display
models. It applies to the ACA, DCV and ACV functions on
the single display MA400 and MA420 models.
Relative (MA400 and MA420 only)
1. Press the
as the reference value. The display will now show readings
relative to the stored reference value. (display = reading -
stored value)
2. Press the Relative key again to exit the Relative mode.
Auto-ranging
If the function selected has more than one range, the meter will
auto-range to the best range and resolution. No manual ranging
is required.
Auto Power Off
The meter will enter a "sleep" mode after 30 minutes of function
switch or push button inactivity. To wake the meter up, press a
button or move the slide switch. Always slide the function switch
to the OFF position when the meter is not in use.
"H " will appear in the display
MAX
Rel key once to a store the displayed reading
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MA Series V2.0 7/02