User Manual & Datasheet V 1.2
10
Calibration
The DIP switches for calibration and settings can be ac-
cessed by opening the top aluminium cover. Calibrating pro-
cess depends on the conductivity of application material.
10.1
For Single Point Switching
10.1.1 Calibration for Non-conductive Material
Note:
Calibration in air is specific to the tank, if the
tank changes, the instrument needs to be calibrated
again.
This calibration is also known as
Air Calibration
and
Cali-
bration without material
. It should be done without the ap-
plication material (i.e only air, no material). Once calibrated
in the empty tank, the device can be used with a wide range
of materials. Calibrating the instrument outside the tank can
cause malfunctions.
Calibration in empty
tank (without material)
Figure 7: Calibration for Non-conductive Material
Follow the given procedure to calibrate the sensor:
•
Install Casper in an empty tank.
•
Unscrew the cover and ensure that all DIP switches
are in the OPEN position as shown in Figure 52. Make
sure that the STATUS LED is not blinking for error.
ON
3
4
5
6
1
2
COVER
UNCOVER
CALIBRATE
HI
CALIBRATE
FS1
FS2
Figure 8: DIP Switch
•
To start the calibration process, set the CALIBRATE
switch to CLOSE (Opposite of OPEN for DIP switch)
position as shown in Figure 53.
ENTER
CASPER
ON
3
4
5
6
1
2
COVER
UNCOVER
CALIBRATE
HI CALIBRATE
FS1
FS2
RELAY 1
RELAY 2
SENS
ITIVITY
1
2
3
4
5
6
CLOSE
Lo
Figure 9: Calibration Switch Position
•
Press and hold ENTER key. The STATUS LED for RE-
LAY 1 will glow in RED color.
ENTER
ON
3
4
5
6
1
2
COVER
UNCOVER
CALIBRATE
HI CALIBRATE
FS1
FS2
RELAY 1
RELAY 2
SENS
ITIVITY
1
2
3
4
5
6
CLOSE
Lo
CASPER
Figure 10: Setting Calibration
•
Release the ENTER key and set the CALIBRATE
switch back to OPEN position.
ENTER
ON
3
4
5
6
1
2
COVER
UNCOVER
CALIBRATE
HI CALIBRATE
FS1
FS2
RELAY 1
RELAY 2
SENS
ITIVITY
1
2
3
4
5
6
CLOSE
Lo
CASPER
Figure 11: Saving Calibration
•
Calibration is done.
10.1.2 Calibration for Conductive Material
This calibration is also known as
Calibration with ma-
terial
. For applications using conductive materials (water,
acid based pastes etc.), Casper needs to be calibrated with
the application material. This will make the instrument spe-
cific to the application material i.e. if the application material
is changed; calibration should be repeated.
Figure 12: Calibration with Material
Follow the given procedure to calibrate the sensor:
•
Fill the tank with the application material such that the
Casper’s probe is completely covered with the mate-
rial.
•
Unscrew the cover and make sure that all DIP switches
are in the OPEN position as shown in Figure 52. En-
sure that the STATUS LED is not blinking for error.
•
To start with the calibration, set the HI CALIBRATE
switch to CLOSE (Opposite of OPEN for DIP switch)
Sapcon Instruments Pvt.Ltd.
®
11