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PTB150-MAN-V14.0
PTB 150-157 Instruction Manual
Before any calibrations follow the general recommendation (chapter 3):
•
Starting the calibration only at ambient temperature: thermal shock can break the sensitive
element of the probe and cause harm to operator.
•
Put the probe to check into the equaliser block: reference to chapter 3. (fig 1-2).
•
Switch on the calibrator with the main switch (2); waiting for the end of auto test procedure.
•
Set the required temperature value on the display:
Press the
key to increment the set point value.
Press the
key to decrement the set point value.
Press the - E - key to confirm the input value.
•
Wait for the stabilisation of the oven before starting any calibration.
•
The time to reach the stability(±0,02°C) from 20 to 100°C is about 20 minutes and from 100 to
0°C it is about 30 minutes.
•
The display shows the temperature of the calibrator and the set point, when the temperature is
reached and it is stable, the display shows the symbol
÷
•
To working at different temperatures set the set point at the new value and wait for the
stabilisation.
•
When the set point is changed, the temperature read on the display and that measured in the
block may not proceed at the same speed; this is because there are differences between the
sensors used and the position of the same inside the block.
•
We suggest to insert one primary standard with SIT certificate in the ø6.5 hole of the block;
compare the measure with the values indicated by the standard.
If you don't always want to make use of the primary standard: it's possible to calibrate the
instrument to more significant points, comparing the displayed temperature with that
temperature of standard.
In case the Quartz is connected with an external probe SIT certificated (ref. 6.5.1), the system is
considered a primary standard.
•
The minimum temperature depends to the ambient
temperature: to do references to the graphic on fig. 6
N.B:
To modify the regulation parameter or to set the ramp,
see the instructions on chapter 10.1.
ATTENTION
•
At the end of the calibration DO NOT remove the probe if it is still at high temperature.
Always allow the calibrator to cool off with the probe still inserted in order to avoid thermal
shock to the probe itself and harm to people or things.
•
Before returning the calibrator to its case makes sure that the temperature of the block is
almost the same as ambient temperature.
Fig.6
