Omega 871A User Manual page 7

ITEM CONTROL/INDICATOR
1. ON/OFF switch
2. Scale and range selector
3. Thermocouple selector
4. Thermocouple input jacks
5. Analog output jack,
+mV OUT and -mV OUT
6. Low battery indicator
7. Overrange/open
thermocouple indication
TABLE 3-1
MODEL 871A AND MODEL 872A
CONTROLS AND INDICATORS
Allows direct connection of two
FUNCTION
Turns unit on or off.
Allows user to select: ºF or ºC scale,
any of four possible thermocouple
ranges, and 1.0º or 0.1º resolution.
Allows user to read either of two
thermocouples by simply turning
the dial.
thermocouples to the unit via an
OMEGA miniature male connector.
The analog output is a nonlinearized,
cold junction compensated, amplified
thermocouple output. (Not isolated
from selected TC input.) Use a
recorder to monitor temperature or
a sensitive DMM to make higher
resolution reading. Refer to mV
output specifications for mV output
to temperature ratios.
When the battery level is low, BAT
will appear in upper left corner of
the display. Battery should then be
replaced to avoid error erroneous
readings due to battery failure.
When an overrange indication or
open thermocouple condition exits,
a 1 followed by blanked digits will
appear in the display.
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