PTB600-MAN-V10.4 PTB 600 Instruction Manual
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6.2.5 - Equalising block
The function of the block is to make the temperature uniform on calibration zone.
If you want to fit the calibrator with a block with different holes we recommend that you should contact the
technical support department who will check to see if it is feasible. This will avoid any unfortunate problems
which might arise if the wrong tolerances are used. The equalization block is in aluminium, Aluminium-
Bronze or Copper depending on the models; holes have been made on the inside to make it possible to fit
various types of probes.
6.2.6 - Temperature sensors
The temperatures sensor used for regulating is a Pt100 and the temperature sensors used to protect the
instrument is a thermocouple.. Both are inserted directly into the equalization block so as to supply a
temperature value close to the real value in the block. There could, however, be some differences due to the
tolerances of the sensors themselves.
6.2.7 - Safety thermostat
The calibrator is supplied with max. temperature safety thermostat (10) that disconnect the heating system.
In case the thermostat intervenes:
Waiting the cooling of calibrator: the temperature must decrease at least 60÷80°C respect to maximum
set point.
Switch off the calibrator then switch on again a few second later on.
If problem persist: disconnect the electrical cable to the oven and proceeding to repair of eventual faults
(reference to paragraph 4); therefore switch on the oven. Consulting chapter 9 – typical faults – for any
problems on the thermostat.
N.B.: the thermostat mounted on standard ovens has been calibrated in factory to intervene at 560 or 610°C
±5°C
depending on the models.
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