- 44 -
8.
To calibrate the second point, repeat the procedure from step 2 to step 7 with the second
saturated solution.
9.
Unscrew the M12X1 threaded ring from the probe and place again the sensor protection
grid.
TAB. 8.6.1: saturated solutions
Temperature (°C)
33%RH Solution
75%RH Solution
15
33.3 75.6
20
33.0 75.4
25
32.7 75.2
30
32.4 75.0
8.6.6
D
IFFERENTIAL PRESSURE CALIBRATION
Differential pressure sensors may show a slight difference between the two inputs, conse-
quently the instrument, with an equal pressure applied to the two inputs, doesn’t show a zero
value. Proceed as follows for the zeroing of the differential value.
Calibration procedure:
1.
Leave the instrument pressure input open.
2.
Access menu with the administrator password and select the item
CAL_MENU
⇒
DIFF_PRES_0
Pa_CAL
. Press
ENTER
to confirm.
3.
The zero value blinks on the display.
DIFF
0
LOG
2
–
4
4.
Press
ENTER
, the instrument stores the calibration and returns to the calibration sub-
menu.
8.6.7
S
ENSITIVITY OF THE ILLUMINANCE AND
/
OR
UVA
IRRADIANCE PROBE
If the illuminance and/or UVA irradiance probe is replaced, you need to set in the data logger
the sensitivity of the new probe. Proceed as follows.
1.
Access menu with the administrator password and select the item
CAL_MENU
⇒
LGHT_SENS_PA_LUX
to set the sensitivity of the illuminance sensor (in pA/lux) or
CAL_MENU
⇒
UVA_SENS_nA_W/m
2
to set the sensitivity of the UVA irradiance sensor (in
nA/Wm
-2
).
2.
Press
ENTER
, the current sensitivity value blinks on the display.
3.
Set the new value by using the
/
keys.
4.
Press
ENTER
, the instrument returns to the calibration submenu.
