45
• Use a Checktemp or another calibrated thermometer with
a resolution of 0.1° as a reference thermometer.
• Immerse the temperature probe in the
beaker with ice and water as near to the
Checktemp as possible.
• Press and hold first CFM and then
CAL to enter the temperature
calibration mode.
• Execute the password procedure.
• With HI21, the meter will ask for the calibration proce-
dure code number. Use
or
to select code 1 for the
temperature calibration and press CFM to enter.
• CAL will blink on the LCD until the
meter confirms a steady reading.
• When the reading has stabilized
at a point near the first calibration
point, CAL will stop blinking and
an intermittent CFM will prompt the
user to confirm the first calibration.
• If the reading stabilizes at a reading
significantly variant from the first
setpoint, an intermittent WRONG
will prompt the user to check the
beaker or baths.
• After pressing CFM the unit will
switch to the second calibration point.
• Select 25 or 50 °C by pressing
or
.
