User Guide

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TEMPERATURE CALIBRATION
(FOR TECHNICAL PERSONNEL ONLY)
INITIAL PREPARATION
Prepare a container of ice and water and
another container with hot water at a known
temperature of 50°C/122°F. Place insulation
material around the containers to minimize
temperature changes.
Use a Checktemp or a calibrated thermom-
eter with a resolution of 0.1 as reference
thermometer.
Note: A blinking "°C" indicates
that the temperature
probe is disconnected.
PROCEDURE
• Connect the temperature probe HI7662 to
the RCA socket on the top of the instru-
ment.
• Turn the instrument off.
• Press the
CAL and
the ON/
OFF keys
simulta-
neously.
0 °C
(32 °F)
°C
50 °C
(122 °F)
°C
gm
°C
NaCl
+
+
CAL
CAL
ON/OFF
ON/OFF
mannacl_r1.P65
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• Immerse the temperature
probe into the 0°C (32°F)
bath.
• When the reading stabilizes, press the
CAL key and the "0.0°C", "CAL" and "BUF"
symbols will be displayed. "
" symbol
will blink for a few seconds.
• "
" symbol will disappear from the dis-
play when the input value is stable and
"CON" will start blinking. Press the CFM
key to confirm the calibration value.
• Immerse the temperature
probe into the 50°C
(122°F) bath.
°
C
0°C
(32°F)
CAL
CAL
BUF
CAL
°C
°C
CON
CFM
CFM
°
C
50°C
(122°F)