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The unit will then begin to automatically adjust its operating temperature
to your original set point with the recalibration factor included . Allow
sufficient time for the unit to re-equilibrate and then again compare the
thermometer or sensor reading to the calibrated display . They should
closely match . If not, repeat the calibration procedure .
7.0 RS232 Interface
The Corning® LSE™ Digital Dry Baths have an RS232 unidirectional data
port . An optional software disk and interface cable are available that allow
a user to use a desktop or laptop computer to record and/or print a record
of the temperature profile produced by the dry bath .
8.0 Troubleshooting Guide
Symptom
Solution
Display/LEDs do not light up 1 . Check power cord and outlet .
2 . Check On/Off switch .
3 . Check fuse .
4 . Contact Corning for service .
Unit not heating
1 . Check if set point below room temperature .
2 . Check if Start LED illuminated .
3 . Press Start key .
4 . Contact Corning for service .
Unit display overshoots
Normal operation . Display set point during
heat-up overshoots on initial heat-up, but
block and sample do not overshoot . See
Operation section of this manual .
Block or sample temperature 1 . Check that unit is in heating mode .
not same as display
2 . Check if unit is sitting in drafty location .
temperature
3 . Check accuracy of thermometer .
4 . Check that thermometer is making good
contact with the sample block .
5 . Follow calibration procedure .
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5.0 Operation
1 . Place the Corning® LSE™ Digital Dry Bath on a sturdy and level surface in
a safe, dry place away from laboratory traffic .
2 . Ensure that the AC power switch is Off, and then plug the three-pronged
power cord into a grounded three-prong AC outlet of the appropriate
voltage (120V or 230V as indicated on the rating sticker near the AC cord
on the back of the unit) .
3 . Select suitable sample block (purchased separately) or appropriate water
volume and put it/them into the Corning LSE Digital Dry Bath .
4 . Turn the AC power On .
5 . Run temperature calibration procedure when using the instrument for
the first time .
6 . Press the Up or Down arrow keys to adjust temperature .
7 . To set the timer press the Mode key, and then press the Up or Down
arrow keys to adjust the time .
8 . The unit will stop with an alarm when time is up .
9 . Press the Start/Stop key to start heating .
10 . To reset timer during heating, press the Start/Stop key to deactivate
heating .
11 . Press the Start/Stop key again to stop the unit .
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 Corning LSE Digital Dry Bath is calibrated at the factory at 40°C using a
standard small hole-pattern 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 . Place a thermometer of known accuracy* into the block
thermometer hole, a thermocouple or other sensor into the sample . Make
sure there is a good fit between the thermometer and the block or good
contact between the sensor and sample or sensor and block .
* 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 .
