811-1005-E01 Datasheet, PDF (13/28 Pages) Magnetrol International, Inc. – Kotron® Model 811 RF Point Level Sensor

1.7.4 RELAY WIRING CHART
Kotron
Power
Material
Level
Fail-safe
Relay
Coil
Relay Terminals
COM to NC COM to NO
HLFS De-energized Closed
Open
High
LLFS
Energized
Open
Closed
On
HLFS
Energized
Open
Closed
Low
LLFS De-energized Closed
Open
HLFS De-energized Closed
High
LLFS De-energized Closed
Fail
HLFS De-energized Closed
Low
LLFS De-energized Closed
Open
Open
Open
Open
LONG DELAY
2 to 120 sec.
SHORT DELAY
0.5 to 7 sec.
DELAY DIRECTION
FAIL-SAFE
Figure 15
1.8 Calibration — Narrow Differential
Caution: In hazardous areas, do not remove housing cover until
power is disconnected and atmosphere is determined to
be safe. Hazardous environments must be declared safe
by local safety authority.
1.8.1 Set Point Adjustment Alarm
1. Turn on power to the instrument.
2. Remove housing cover.
3. Set point location:
TIME DELAY
DIFFERENTIAL
a. Conductive media: The set point is located at the tip of
the probe (with guarded or other uninsulated probes).
Calibration is not required for most conductive liquids.
If the unit does not switch on alarm test, then proceed
to Step 4.
COARSE
FINE
b. Non-conductive media: The set point is located on the
probe at a point determined by the set point adjust-
ment. Minimum probe coverage is 4 inches (100 mm).
Calibration is required. Proceed to Step 4.
4. Adjustments – Refer to Figure 15.
4.1 Dip switch
a. Fail-safe
ON = high level
OFF = low level
b. Time Delay Direction
ON = delay on rising level
OFF = delay on falling level
c. Short Time Delay (0.5 to 7 seconds)
3 ON, 4 OFF
d. Long Time Delay (2 to 120 seconds)
3 OFF, 4 ON
NOTE: Switch positions 3 and 4 cannot be both ON or both OFF. One
must be ON the other OFF or the LED and relay will remain ON.
50-608 Kotron Model 811 RF Point Level Sensor
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