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TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
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for technical personnel onlyfor technical personnel only
for technical personnel onlyfor technical personnel only
for technical personnel only
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CAL
C
All the instruments are factory calibrated for temperature.
Hanna’s temperature probes are interchangeable and no tempera-
ture calibration is needed when they are replaced.
If the temperature measurements are inaccurate, temperature
recalibration should be performed.
For an accurate recalibration, contact your dealer or the nearest
Hanna Customer Service Center, or follow the instructions bellow.
• Prepare a vessel containing ice and water and another one
containing hot water (at a temperature of around 50 ºC). Place
insulation material around the vessels to minimize temperature
changes.
• Use a calibrated thermometer with a resolution of 0.1 ºC as a
reference thermometer.
• With the instrument off, press and hold down the CAL & MEM
keys, then power on the instrument. The “CAL” message will
appear and the secondary LCD will show 0.0 ºC.
• Immerse the temperature probe in the vessel with ice and water
as near as possible to the reference thermometer. Allow a few
seconds for the probe to stabilize.
• Use the ARROW keys to set the reading on the secondary LCD to
that of ice and water, measured by the reference thermometer.
• When the reading is stable and close to the selected calibration
point, “READY” message will appear and “CFM” message will blink.
• To confirm press CFM. The secondary LCD will show 50.0 ºC.
• Press RANGE to display the tem-
perature reading on the LCD during
calibration (HI 2211 only).
ONE-POINT CALIBRATIONONE-POINT CALIBRATION
ONE-POINT CALIBRATIONONE-POINT CALIBRATION
ONE-POINT CALIBRATION
• Proceed as described in “Two-point calibration” section.
• Press CAL after the first calibration point
was confirmed.
The instrument will return to measurement mode
and will memorize the one-point calibration data.
Note: Press and hold down CFM and then press CAL. The instrument
sets default calibration parameters, displays “CLR” message for a
few seconds and then returns to normal measurement mode.
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