Tegam 921B, Operation Manual, Page: 20 / 47

Operating Instructions
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The T1 - T2 view mode displays the current Channel 1 measurement minus the current
Channel 2 measurement. The display indicates T1-T2 at the left side of the display. If either
channel is not connected to a probe, or the current measurement on either channel is over -
or under - range, T1 -T2 view mode is not available.
When viewing statistics, the active statistic is indicated directly below the result. The
elapsed time of the current statistics session is displayed in the lower - left corner of the
display.
Statistics are calculated continuously, beginning when the instrument is powered on or when
(1.5s) is pressed. To pause statistics collection temporarily, press . To resume statistics
collection, press again.
It is important to note that changing parameter values or temperature probes will invalidate
the current statistics session. When using statistics, always begin by pressing
(1.5s) to
delete existing statistics data and initiate a new statistics session.
Press to step through the available statistics. Statistics are displayed in the order shown
in Figure 7 below. For dual - channel models, the LCD T1 or T2 indicators are lit to identify the
channel’s statistics currently being displayed .
When using statistics, always begin by pressing (1.5s) to clear existing statistics
results and initiate a new statistics session.
The first line of the display indicates the current Channel 1 temperature, regardless of
which view mode or channel’s statistic is currently displayed.
M
ODEL
C
HANNEL
S
TATISTIC
V
IEW
S
EQUENCE
921B T1 MIN MAX AVG RNG STDEV
922B
T1 MIN MAX AVG RNG STDEV
T2 MIN MAX AVG RNG STDEV
Figure 7: Statistics Sequence
If the instrument records invalid measurement data during the statistics session such as an
over - range, under - range, or open input value, ———— will be displayed for each affected
statistic result .
To return to the active measurement mode, press repeatedly to step through the
remaining view mode s , or cycle power .
Auto-Power Off
Key designators followed by (1.5s), e.g. (1.5s) , indicate that the key should be
pressed and held for 1.5 seconds, then released to access the desired function.