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User Manual & Datasheet V 1.2
•
The Sensitivity Bar Display will indicate the current
sensitivity value. As can be seen in the Figure 31, the
value been shown here is
3
.
•
To modify the set value, Press ENTER and HOLD the
key, RED STATUS LED for RELAY 1 will start blink-
ing. Count the number of times the LED blinks and
release the ENTER key after the required value. e.g.
For setting the sensitvity to 4, count up to four blinks
and release the ENTER key.
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 32: Setting Sensitivity
•
To save the sensitivity value, set the UNCOVER and
CALIBRATE switches back to OPEN position.
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 33: Setting Sensitivity
•
Check operation of Casper by filling in and draining out
the material.
•
If the instrument does not switch when covered with
the material, try again with a higher value of sensitivity.
•
If the instrument does not switch back to the uncovered
state, try with a lower sensitivity value.
Please refer to Table 10 before selecting sensitivity value.
SENSITIVITY
DIELECTRIC CONSTANT
1
>
30
2
20-30
3
5-20
4
2-5
5
>
1.5 &
<
2
Table 4: Sensitivity
14
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
(default) is set by moving the FS 1 and FS 2 switch for relay
1 and 2 to OPEN position.
1. When not in contact with the material, LED turns
GREEN.
2. When in contact with the material, LED turns RED.
CASPER
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
Figure 34: Failsafe High
Prevent Dry run - Low Level Switch
Failsafe Low is set
by moving the FS 1 and FS 2 switch for relay 1 and 2 switch
to CLOSE position.
Note:
LO in top cover indicates failsafe low.
1. When in contact with the material, LED turns GREEN.
2. When not in contact with the material, LED turns RED.
CASPER
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
Figure 35: Failsafe Low
15
Display Indications
As seen in Fig.36, Casper has STATUS LEDs and a 6-
point LED bar display.
ENTER
CASPER
+
-
NC
C
NO
ON
DIP
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
Lo
+
-
OUT
L
N
E
Relay-1
PNP
STATUS
LED
Figure 36: LED Indication on Top Cover
Sapcon Instruments Pvt.Ltd.
®
15