Manual
This unit is not waterproof. Do not immerse for cleaning. If unit becomes wet inside because of
cleaning, rain, or condensation, unstable readings may occur.
Not intended for human medical applications.
Cooper-Atkins Corporation, 33 Reeds Gap Road., Middlefield, CT 06455-0450 U.S.A.
27-958456E
INSTRUMENT AMBIENT RANGE
0 to 130 °F (-17 to 54 °C) 90% RH(Non-condensing)
TEMPERATURE MEASUREMENT RANGE
Probes 1 & 2: -40 to 300 °F (-40 to 150 °C)
Probe 3: 0 to 150 °F (-17 to 65 °C)
HUMIDITY MEASUREMENT RANGE
10 to 95 %RH (30 to 130 °F) (-1 to 54°C)
OPERATION
1) Turn meter on by pressing “ON/OFF” button.
2) Meter will read 888.8, then default to read TEMP1 probe.
3) To display TEMP2 temperature, install probe in T2 jack
and press “TEMP2” button.
4) To display %RH, install humidity probe in T3 jack and
press “%RH/TEMP3” button.
5) To display TEMP3 press the “%RH/TEMP3” button.
6) To measure Absolute Temperature Difference between
probes T1 and T2: while displaying either T1 or T2,
press the “DIFF/W BULB” button.
7) To display the Wet Bulb Temperature: while displaying
%RH, press the “DIFF/W BULB” button.
8) Press the “ON/OFF” button to turn the meter off.
FEATURES
1) Press the "F/C" button to display temperature in °C.
2) Press the "LIGHT/OC" button to illuminate the display.
3) Press the “MIN/MAX” button to display MIN/MAX readings.
4) Press the “MIN/MAX” button while displaying MIN/MAX
values to clear the MIN/MAX memory.
5) Press the “ON/OFF” button while displaying MIN/MAX
values to enter the SCAN mode.
6) Exit the SCAN mode by pressing the “TEMP1” button
until dashes appear on the display.
7) Disable the automatic shut off feature by pressing the
“LIGHT/OC” button 3 times within 5 seconds.
DISPLAY ANOMALIES
LO The temperature being monitored is below -40 °F,
or the probe is disconnected.
HI The temperature being monitored is above 300 °F.
LO.P Indicates low power; Replace 9 volt NEDA Type
1604A alkaline battery.
OPERATING INSTRUCTIONS
CAUTION
THIS UNIT IS CALIBRATED TO STANDARDS TRACEABLE TO THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY
SRH77A