Micronta 22-195A - MEMORY FUNCTION TECHNICALITIES; Max;Min Value Interpretation; Technical Notes on Memory

(5) The maximum and minimum values are
determined by using the absolute value of the
quantity measured (sign “+” is ignored).
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Min. Max.
(6) When the measurement is overrange, the
rightmost dot on the bar graph blinks.
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(7) When the meter is in the autorange mode,
and the maximum and minimum values span
over more than one range, the O or 30 dot
blinks to indicate that the minimum or maxi-
mum value is in another range.
Note: To avoid recording excessive fluctua-
tions caused by the initial switching or a
change of ranges, the memory does not func-
tion until:
(1) 10 seconds after changing a function con-
trol or operating the UP/DOWN switches;
(2) 3 seconds after operating the
AUTO/MANUAL switch; and
(3) 10 seconds after the range changes from
the 3000 kohm to the 30 megohm range.
Note to the technically curious:
This unit employs two A/D converters. One
serves to digitally display the measured value.
This converter requires 100 ms to sample
values, and updates the display 2.5 times per
second. Another converter is used to meas-
ure/display the bar graph and to register
MIN/MAX values. The sampling time and rate
for this converter is much faster, 15 us sam-
ple at an update rate of 7.5 times per second.
Incidentally, this rapid converter is also used
to automatically shift the range, so that the
auto-ranging of this meter is much faster than
normal auto-ranging digital multimeters.
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