User Manual & Datasheet V 1.2
when uncovered, try again with a lower sensitivity
value.
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Failsafe
In a condition of device failure, known errors and input
power failure the outputs of the device resemble the ALARM
condition. This is meant to prevent overflow or dry run con-
ditions in case of failures.
Prevent Overflow - High Level Switch
Failsafe High (de-
fault) is set by moving the FAILSAFE switch to OPEN posi-
tion.
1. When not in contact with the material, LED turns
GREEN.
2. When in contact with the material, LED turns RED.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 71: Failsafe High
Prevent Dry run - Low Level Switch
Failsafe Low is set
by moving the FAILSAFE switch to CLOSE position.
1. When in contact with the material, LED turns GREEN.
2. When not in contact with the material, LED turns RED.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 72: Failsafe Low
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Factory Reset
Follow the steps given below to reset the time delays and
sensitivity value to default values. Factory Rest does not
reset any calibration values.
1. Set the CALIBRATE, COVER and UNCOVER switches
to CLOSE position.
2. Press and hold the ENTER key until the STATUS LED
blinks.
3. Set the CALIBRATE, COVER and UNCOVER switches
back to OPEN position.
4. This will set the time delay to 0 and the sensitivity level
to 3.
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 73: Switch Position
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 74: Setting Default Value
OPEN
1
2
ENTER
CALIBRATE
FAILSAFE
CASPER
STATUS
LED
RED
GREEN
3
4
UNCOVER
COVER
NAMUR
Figure 75: Saving Default Value
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Certification
Please refer to Table 11 for Certifications.
CERTIFICATION
ITEM SELECTION
IS/IEC 60529: 2001 (IP68)
IS/IEC 60529: 2001 (IP66)
IS/IEC 60079-1:2014 (Ex
’d’)
Ex ia IIC T3 Ga
NMR-DC6
Table 11: Certifications
28
Maintenance
The electronics of Casper needs no maintenance. When
cleaning and checking the vessel, free the Casper from de-
posits. If the material has tendency to form a hard sticky
deposit, the instrument must be checked more often. Make
sure that the cable ducts and the lid are tightly sealed so
that no moisture seeps into the instrument.
Sapcon Instruments Pvt.Ltd.
®
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