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TEMPERATURE TESTING
1. To ensure good thermal conductivity, select the proper Modular Heating Block
for your application. Select the proper tubes or vials which are the proper size for
the Modular Heating Block. Close contact, with no air gaps, must be maintained
between the walls of the Modular Heating Block well and the sides of the tubes or
vials.
2. Fill the tubes or vials so that the fluid level does not rise above the top surface of
the Modular Heating Block.
3. Select a temperature measuring device that is designed for immersion in liquids.
Place your calibrated temperature measuring device in one of the samples so it
reaches the bottom of the tube or vial. Once the temperature measuring device is
placed in the fluid sample, ensure the fluid level is still below the top surface of the
Modular Heating Block.
4. Set the desired temperature on the unit, allow the unit to reach this temperature,
and let the unit stabilize for an additional twenty (20) minutes or more before taking
any temperature readings.
5. The temperature can also be tested by utilizing the thermometer hole in the Modular
Heating Block. A calibrated temperature measuring device can be inserted into the
thermometer hole where there is a snug fit and close contact between the walls
of the block and the temperature device. The temperature device must reach the
bottom of this hole with no air gaps. Follow the procedure above for allowing the
unit to reach temperature and stabilize before taking any temperature readings.
6. If the measured temperature on your temperature measuring device does not
match the actual temperature on the display of the unit (for Digital units only), then
the single point calibration procedure can be used. By doing this, the unit will now
be more accurate at that set-point for your specific application.
STABILITY TESTING
1. The manufacturer has performed temperature stability tests on Dry Block Heaters.
The manufacturer used calibrated temperature measuring device for the stability
tests. Units were set-up with the proper number of Modular Heating Blocks so
the heater plates were not exposed to the environment. A calibrated temperature
measuring device was inserted into the thermometer well of one block on each
unit. The testing temperature was set, the units were allowed to heat up and
stabilize for a minimum of twenty (20) minutes and then temperature readings
were recorded at regular intervals for four (4) hours. These tests confirmed the
temperature stability of the units.
2. The recommended procedure for testing the unit's stability is as follows:
a. Set-up the unit in a stable environment.
b. Set-up the unit with the proper number of Modular Heating Blocks for the unit.
Place a calibrated temperature measuring device into the thermometer well of
the Modular Heating Block. The temperature device should have a snug fit with
no air gaps in the thermometer well. Set the temperature of the unit. Allow the
unit to reach temperature and stabilize for twenty (20) minutes or more and then
take temperature readings for stability.
c. Another method to test for stability is to set up the unit with the proper number of
Modular Heating Blocks and then place the proper fitting tubes or vials into the
blocks. Fill the tubes or vials with liquid, where the liquid level is lower than
the top surface of the Modular Heating Block. Use a calibrated temperature
measuring device that is designed for immersion in liquids, and place the
temperature probe in the bottom of one of the tubes or vials in one block. Set
the temperature of the unit. Allow the unit to reach temperature and stabilize for
twenty (20) minutes or more and then take temperature readings for stability.
Please note the characteristics of the liquid used for the test and the fit of the
tube or vial in the Modular Heating Block can affect the results of a stability
test for the Dry Block Heaters. Tubes and vials must be the proper size for the
Modular Heating Block so there is a secure fit with no air gaps to ensure good
thermal contact.
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