Axial Homogeneity Adjustment - Presys TA-1200PLAB Technical Manual

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block temperature. It is used to eliminate oscillations. However, it can cause oscillations in
the presence of much noise.
All temperature calibrators are tuned in factory and the parameters are close to the
optimum ones. In case one wants to improve a specific feature of the calibrator
(stabilization time or response time, for instance), make sure the alteration is made
reasonably.
The changes can be made entering the menu SYSTEM → GENERAL →
PID CONFIG. This menu is protected by password (9875).

6.4 - Axial Homogeneity Adjustment

Attention! Performing this procedure may change the accuracy of the calibrator.
When changing the insert it may be necessary to readjust the axial homogeneity of
the TA-1200PLAB
Following this procedure, the user will be able to obtain gradients of the order of
± 0.35 °C for the range of 150 to 1200 °C within the length of the calibrator measurement
zone. The measurement zone of this equipment is 10 cm from the bottom of the insert
outwards.
The TA-1200PLAB calibrator has three independent controls acting on three
heating zones to guarantee any desired temperature profile on your isothermal block. All
measuring and differential thermocouples used in the instrument are of noble metals to
ensure the best temporal stability.
Homogeneity Test
The homogeneity test must be done with two standards of noble metal
thermocouples inserted in the same horizontal hole as the insert. For this test, one
thermocouple remains in the bottom of the well and the other is removed every 2 cm until
it reaches 10 cm. See the figure below:
Fig. 18 - Equipment Connections
TA-1200PLAB
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