User Manual & Datasheet V 1.2
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 66: Saving of Low Current Configuration
shown by constantly glowing GREEN LED of STATUS
LED.
To set this mode please follow the procedure given
below:
•
Set the COVER and UNCOVER switch to CLOSE po-
sition as per Figure 64.
•
Press and Hold the ENTER key, RED Status LED will
start blinking as per Figure 65.
•
Blink the RED LED only once and release the ENTER
key as per Figure 66.
•
High Current Configuration mode is set.
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Sensitivity
Note:
Set the sensitivity value between 1-5.
The instrument has 5-point sensitivity level to suit a wide
range of application materials. Sensitivity value should be
decided with respect to the dielectric constant of the appli-
cation material. Refer to table 10 for selecting a suitable
value. By default, the sensitivity is set to 3 to suit a wide
range of materials. Traverse the following steps to set the
sensitivity:
Note:
Set the Sensitivity of the level instrument only
in a Safe Zone (Zone 2).
1. Power OFF the instrument and unscrew the electronics
insert from the enclosure using screw driver.
Hazardous Area (Zone 0)
Tank
Casper
Namur
Power OFF Condition
ENTER
STATUS
LED
RED
GREEN
CASPER
NAMUR
+
-
ON
DIP
OPEN
1
2
3
4
COVER
UNCOVER
CALIBRATE
FAILSAFE
L
N
E
NOT USED
Figure 67: Sensitivity Setting
2. Kept the electronics in Safe Zone(Zone 2) and then set
the Sensitivity.
3. Refer to given Figure 49 for Electrical Connections to
power up and connect the device.
4. Select a sensitivity value for the product as per table
DIELECTRIC
CONSTANT
SENSITIVITY
VALUE
High
1
−
2
Low
3
−
5
(default)
Table 10: Switching Sensitivity
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 68: Sensitivity Switch Position
5. Set the CALIBRATE and UNCOVER switch to CLOSE
position.
6. To modify the set value, Press ENTER and HOLD the
key, RED Status LED will start blinking. Count the
number of times the LED blinks and release the EN-
TER key after the required value. e.g. For setting the
sensitvity to 4, count up to four blinks and release the
ENTER key.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 69: Setting Sensitivity Position
7. To save the sensitivity value, set the CALIBRATE and
UNCOVER switches back to OPEN position.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 70: Saving Sensitivity
8. Check operation of Casper by filling in and draining out
the material.
9. If the instrument does not switch when covered fully
with the material, try again with a higher value of sen-
sitivity.
10. If the instrument switches when covered fully with the
material, but does not switch back to normal state
Sapcon Instruments Pvt.Ltd.
®
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