CHEMOTRONIC III
16
6.
Calibration
6.1. Temperature calibration
In the Chemotronic a powerful microprocessor system is installed for the control of
all instrument functions. A 12 bit A/D-converter is used to convert the analogue
inputs of the Pt 100 sensor into a digital signal. The input circuit is designed for
automatic zero setting (auto zero) and automatic span setting (auto cal) by internal
references. Therefore manually calibration of the temperature measuring functions
is eliminated.
The temperature control functions are also automatically optimised for quick
temperature response and control (self tune). Therefore , manual settings of
control parameters are eliminated is well.
6.2. Speed calibration
The speed of the magnetic stirring rod in the test tube is controlled by a motor with
tachometer and electronic drive circuit. Therefore rotation speed settings and
indications are absolutely exact. As the motor speed is controlled, the speed
indication is also indicating a rotation speed when the magnet stirring rod is in a
fixed position in the test tube, for instance due to molten resin in the test tube.
6.3. Time calibration
Due to the high accuracy of the built in real time clock there will be no short term
deviations in the timing functions.
Summary of Contents for HEMOTRONIC III
Page 54: ...CHEMOTRONIC III 54 Appendix...
