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User Manual & Datasheet V 1.2
Figure 56: Calibration for Conductive Material
•
To start with the calibration, set the CALIBRATE &
COVER switch to CLOSE (Opposite of OPEN for DIP
switch) position as shown in Figure57.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 57: High Calibration Switch Position
•
Press and hold ENTER key, the STATUS LED will glow
in RED color as shown in Figure 58.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 58: Setting Calibration
•
Release the ENTER key and wait for 25 - 30 seconds.
•
Set the CALIBRATE and COVER switch back to OPEN
position as shown in Figure 59.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 59: Saving Calibration
•
High Calibration is complete.
•
Proceed to Section Installation Guidelines for installing
the product in an application tank.
22.4
Remote Calibration
Note:
Remote calibration is performed when test
tank is not available in Safe Zone (Zone 2) and cal-
ibration needs to be performed in Hazardous Zone
(Zone 0).
22.4.1 Calibration for Non-conductive Material
This calibration is also known as
Air Calibration
and
Cal-
ibration without material
. It should be done without the
application material (i.e only air, no material).
Note:
Power OFF the level instrument before starting
the calibration process.
To carry out calibration process, please follow the steps
mentioned below:
•
Ensure that all DIP switches are in the OPEN position.
Safe Area (Zone 2)
Hazardous Area (Zone 0)
18-24 V DC
+
-
Power Supply
Tank
Namur
Barrier
Casper
Namur
8.2 V DC
GND
Power OFF Condition
ENTER
STATUS
LED
RED
GREEN
8.2 V DC
CASPER
+
-
ON
DIP
OPEN
1
2
3
4
COVER
UNCOVER
CALIBRATE
FAILSAFE
(NOT USED)
NAMUR
1
2
3
4
5
6
7
8
9
Figure 60: Air Calibration Setup
•
Set the CALIBRATE switch to CLOSE (Opposite of
OPEN in a DIP switch) position as shown in Figure 53.
•
Close the cover of housing properly before powering
on the instrument.
•
Power ON the instrument and wait for a minimum of 60
seconds.
ENTER
STATUS
LED
RED
GREEN
CASPER
ON
DIP
OPEN
1
2
3
4
COVER
UNCOVER
CALIBRATE
FAILSAFE
NAMUR
60 Seconds
Figure 61: Power ON Condition
•
Power OFF the instrument.
•
Open the housing cover and set the CALIBRATE
switch back to OPEN position as shown in Figure 55.
•
Close the cover of housing properly.
•
Power ON the instrument.
•
Low calibration is completed.
22.4.2 Calibration for Conductive Material
For applications using conductive materials (water, acid
based pastes etc.), Casper needs to be calibrated with the
application material. This will make the instrument specific
to the application material i.e. if the application material is
changed; calibration should be repeated.
Sapcon Instruments Pvt.Ltd.
®
21