PN 10795T 36
Note: When measuring the substitution heater resistance of a 200 mm calorimeter, R1 and R2 must be
connected together in series.
Compare this resistance to R
c
in the calibration data in the front of the manual. The two should
agree within 2%. If not, contact Scientech.
C. Remove the DVM. Connect a power supply to the white jacks and connect the DVM to monitor
the power supply.
D. Set up the power meter in the Watts Mode and the 30W range.
E. Remove the screws holding the interface module’s ID tag and remove the plate to expose the
circuit board. Refer to Figure 4.
F. Apply V
h
volts, stated in the calibration data you received with the calorimeter, to the substitution
heater.
G. If needed, adjust the calibration trim pot, R4 on the calorimeter circuit board, until W
h
Watts, from
the calibration data, is displayed by the power meter.
Calibration without an Interface Module and H410 Power Meter
Note: Whenever a large aperture calorimeter is used without an power meter the interface module is not
used.
For this procedure you will need to make an adapter cable to go from the calorimeter’s DIN connector to
the DVM. The voltage output is on pin 1 of the DIN connector and should be connected to the positive
side of the DVM. Ground is on pin 3 and should be connected to the negative side. Pin 2 is not used.
Refer to Figure 5.
A. Connect a DVM to the white jacks of the calorimeter. Refer to Figure 5.
B. Measure the resistance of the substitution heater making sure to subtract the resistance of the patch
cables from the total resistance measurement.
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