13
OL
readings. In other words, the meter will intelligently avoid entering the APO mode
when it is under normal measurements.. To wake up the meter from APO, press the
SELECT, RANGE, RELATIVE or HOLD
button momentarily or turn the rotary switch OFF
and then back on. Always turn the rotary switch to the OFF position when the meter is not in
use
Disabling Auto-Power-off
Press the
SELECT
button while turning the meter on to temporarily disable the Auto-Power-
Off feature. Turn the rotary switch OFF and then back on to resume.
Data Logging operation (
TBM525
only)
1) Set logging interval
●Press the
(
Timer
) button for 1 second or more to display the selected sampling speed
in second. Factory default t0.05 means sampling speed is 0.05 second. Press the
(
Up-
arrow
) or
(
Down
-
arrow
) button momentarily to select a different sampling speed from
0.05s (0.1s for single T1/T2, Diode &
/nS; 0.5s for Hz/Duty; 2s for Cx & dual T1
+T2
/
T1-T2
+T2
), 0.1s, 0.5s, 1s, 2s, 3s, 4s, 5s, 10s, 15s, 30s, 60s, 120s, 180s, 300s, up to the slowest
600s. Then press the
(
Timer
) button for 1 second or more to confirm the new setting.
The setting resets to default when function is changed.
2) Start/Stop data-logging
Note: Set/view logging interval right before starting data-logging to avoid mis-handling.
Data-logging functon stops automatically to ensure logged-data accuracy when Low-battery
indication turns on. Lo-bat symbol stays with the last logged data as a reminder.
●The meter supports multi-session data-logging. Multiple functions can be logged one-at-a-
time into the meter free memory up to 999 separate session-pages without erasing the
formerly logged one(s). Press the
(
Start
) button for 1 second or more to start the
data-logging mode. “
LEFt
” displays momentarily followed by a number (mini / main displays
for most-significant / least-significant numbers separately) to indicate the memory points left
for new logging session(s). Below example illustrates 43102 memory points is available for
new logging session(s). Data-logging capability: 5400/10800 points for
TBM521
dual/single
display; 43500/87000 points for
TBM525
dual/single display.
