Calibration - Labnet D1301 Mode D'emploi

6.0 Calibration

Calibration allows the unit temperature display to be adjusted or matched to the
temperature of a single sample or to a calibrated thermometer making an independent
temperature measure of the block.
The Digital Dry Baths are calibrated at the factory at 37, 60, 90, 120, 140°C using a
standard 20 x 13mm heating block. If you are using a block with a high heat loss rate
such as a block with large holes or a platform style block, you may choose to recalibrate
the unit to your specific application. Also, if you are using very loose or odd shaped
vessels, the calibration function can help you match the display temperature to your
actual sample temperature.
To calibrate the unit for a given block or sample, first turn the unit off using the On /
OFF switch. Then place a thermometer of known accuracy* into the block thermometer
hole or a thermocouple or other sensor into your sample. Make sure there is a good
fit between the thermometer and the block or good contact between any sensor and
sample or sensor and block.
To calibrate the block or sample to the display, use the following procedure:
1. Press and hold the START/STOP key then simultaneously power up the unit
with the ON/OFF switch.
2. You should hear a "DU-DU-DU." sound from the dry bath and the display will
have one segment flashing on the left and will show a set temperature, and the right
will show adjt.
3. Use the UP and DOWN arrow keys to set the desired temperature at which
you want to calibrate the unit. Then press the START key.
4. Allow time (up to 10 or 20 minutes) for the unit to heat up to your set
temperature and to equilibrate at this emperature. The entire LED display will
start flashing when equilibration is reached.
5. After the entire display has started slashing, red the thermometer (or sensor
meter) and use the UP and DOWN arrow keys to adjust the display to the
thermometer or sensor reading then press the START/STOP key.
6. The unit will then begin to automatically adjust its operating temperature to
your original set point with the re-calibration factor included. Allow sufficient
time for the unit to reequilibrate and then again compare the thermometer or
sensor reading to the calibrated display. They should closely match. If not,
repeat the calibration procedure.
* Thermometers used for calibration purposes should have a written calibration certificate and be
traceable back to NIST or some other certified body. General lab thermometers are often not accurate
enough for calibration work.
4 | AccuBlock Digital Dry Bath