EIUK PTB 600 - Page 23

PTB600-MAN-V10.4 PTB 600 Instruction Manual
23
- Cal_chnl:
Chooses the channel to be calibrated. It can assume three values: INT, EXT, REF. Press the
 or 
key to select INT, EXT or REF and press E key to accept
- P1:
First Calibration point. Press the
 or  key to set the value read with the standard thermometer and
press E key to accept
- P2:
Second Calibration point. Press the  or  key to set the value read with the standard thermometer
and press E key to accept.
- CAL: INT (Y/N):
This writing can have three different configurations.
CAL: INT (Y/N) if Cal_chnl is set on INT
CAL: EXT (Y/N) if Cal_chnl is set on EXT
CAL: REF (Y/N) if Cal_chnl is set on REF
Press the
 or  key to set Yes or Not and press E key to accept.
EXAMPLE OF RE-CALIBRATION
The appliance can have a complete or partial re-calibration yearly or when chosen by the user.
Calibration can be carried out using CALIBRA ED200 software or directly on the keyboard of the appliance.
The calibration of the INTERNAL probe is done by adjusting the internal probe at two points of the range
using a standard thermometer.
The calibration of the EXTERNAL and the REFERENCE inputs is done by adjusting the inputs of the
controller at two points of the range using a mV/ohm standard generator.
The calibration is possible only by setting the temperature in °C.
CALIBRATION OF THE INTERNAL PROBE
The purpose of re-calibration is to correct the error between the temperature indicated and the value of a
standard thermometer.
To calibrate the internal probe it is necessary to have a standard thermometer with precision greater than
that of the appliance and then to follow the instructions:
1. Insert the standard thermometer probe in the temperature bath or in the most suitable hole of the
calibrator.
2. Choose two calibration points depending on the appliance range or the field where one wishes to
carry out calibration. For example the points 0 and 120°C are recommended for the QUARTZ.
3. Set the first calibration point and wait for the appliance to be stable (see symbol ÷)
4. Enter the third menu level (see instructions) and select Cal_chnl= INT. Press E to confirm.
5. Press F to select P1, press the
 or  key to set the value read with the standard thermometer
and press E Key to accept. Confirmation is indicated by the symbol * which appears on the display
after about 5 seconds.
6. Return to the first menu level and set the second set point. Then wait for the appliance to be stable
(see symbol ÷).
7. Enter the third menu level (see instructions) and select P2, press the  or  key to set the value
read with the standard thermometer and press E Key to accept. Confirmation is indicated by the
symbol * which appears on the display after about 5 seconds.
8. Select CAL: INT set Yes and confirm by pressing E key . Calibration begins. The procedure takes a
few seconds, at the end of which there is a Beep.