Omega HH931T, User Manual

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Operating Instructions
3-5
Press to change view modes. For each mode, the active measurement or statistic result
is displayed on the second line of the display.
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 8 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.
V
IEW
M
ODE
D
ISPLAY
I
NDICATOR
D
ESCRIPTION
T1–T2 T1-T2
Current Channel 1 measurement – current
Channel 2 measurement
Minimum MIN
Minimum temperature recorded during current
session
Maximum MAX
Maximum temperature recorded during current
session
Average AVG
Average of all temperatures recorded during
current session
Range RNG Maximum - Minimum
Standard Deviation STDEV
Standard deviation of all temperatures recorded
during the current session 1 .
1 Standard Deviation is calculated using the population formula:
𝜎𝜎 =
�
∑ ( 𝑥𝑥−µ )
2
𝑁𝑁
Figure 7: View Modes and Statistics