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37
For combined probes, two distinct calibration procedures are contemplated:
one for the tempera-
ture sensor and one for the relative humidity sensor.
Calibration of the Pt100 or thermocouple Temperature Sensor
Save the case in which the temperature sensor is working in a particularly hostile or corrosive at-
mosphere, or where, by mistake, its calibration has been endangered, the temperature probe does
not normally require recalibration: it is advised to assess the need for new calibration carefully be-
fore taking action.
The calibration menu contemplates two methods for calibrating the temperature sensor:
1) Set standard Pt100 (only for Pt100 sensor temperature probes)
: returns the sensor parameters
to the default values of the standard Pt100 curve. When the key <1/MATH> is pressed the nomi-
nal values of the Pt100 sensor are copied into the memory of the selected probe. This function is
used if the probe has not been calibrated and it is not possible to perform calibration of the sen-
sor. To quit the function without making any changes, press <ESC/CLR>.
2) Cal. sensor temp (for Pt100 or thermocouple sensor temperature probes)
: requires a calibration
oven and a reference thermometer. Press the key <2/LOG>: the temperature measurement taken
by the Pt100 or TC (thermocouple) sensor will appear. Insert the probe to be calibrated together
with the probe of the reference thermometer in a calibration oven (
respecting the range of op-
eration of the RH probe
). the probe must be protected against any liquid in the oven. The cali-
bration point may have any value within the working range of the RH probe, since with this op-
eration an alignment is made with the theoretical curve. Wait until the measurement has stabi-
lised: if necessary use the arrows to correct the value indicated by the instrument, causing it to
coincide with the value found by the reference thermometer. Press the <ENTER> key to con-
firm.
Calibration of the Relative Humidity Sensor
0
1
2
3
(2)
The menu for calibrating the RH sensor proposes four versions: the first refers to complete calibra-
tion on 2 or 3 points; the other three versions are used for aligning a single point at 75%, 33% and
11%RH.
(2)
Tune-up = adjustment, fine regulation
