Calibration; Usb Interface - Labnet Accublock D1301 Instruction Manual

4 | LABNET MICROTUBE SHAKING INCUBATOR

7.0 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 13 mm
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 sensormeter) 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.

8.0 USB Interface

The Digital Dry Baths have a USB unidirectional data port. A software and cable are available which
allow a user to use a desk top or lap top computer to record and/or print a record or the temperature
profile produced by the dry bath.