IntelliPoint RF RML Series
Calibration
15
Section 3: Calibration
WARNING:
Before removing the explosion-proof housing cover in a
potentially hazardous area, make certain that the area
is safe. When calibration is complete, the cover must be
replaced. Each conduit from the explosion-proof case must be
equipped with an approved seal fitting.
3.1 Setpoint Control
There is a single adjustment located on top of the instrument
that controls the point at which the relay operates. A red
LED indicates that relay is de-energized.
Each revolution of the control changes the operating point
approximately 4 pF. (For high-sensitivity models, each
revolution will change operating point approximately 1 pF.)
Turning adjustment clockwise will raise level at which relay
operates, turning it counterclockwise will lower level at
which relay operates. Refer to
Figure 2-5
and
Section 3.3.
3.2 Adjustable Differential Controls
Differential is the hysteresis (dead band), or change in level,
necessary to switch electronic unit from one state to another.
It is useful to prevent oscillation "chatter" on those occasions
when level happens to be right at switching point or when
surface is agitated.
RML Series level control with adjustable differential allows
user to determine amount of capacitance change (hence level)
between control point and recovery point. User can select two
points on a vertical sensing element where relay contacts will
open at one point and close at the other.
Range of operation is 3 to 100pF.
Low point range is that range of capacitance over which
lower switching point may be adjusted.
Differential range corresponds to differential in level on
sensing element and depends on both the capacitance of
the element itself and the properties of the material being
measured.
See Figure 2-5
for location of adjustments. For
calibration of adjustable differential units, see
Section 3.3.5
3.3 Calibration Procedures
All RML Series controls with bare metal sensing elements
are factory-set to switch in all water-based conducting
materials. NO calibration adjustment is needed.
DIFFERENTIAL
SP
Figure 3-1
Set point Adjustment
CLOCKWISE WILL RAISE
OPERATING LEVEL
COUNTER-CLOCKWISE
WILL LOWER OPERATING
LEVEL
25 TURN
Figure 3-2
Differential Adjustment
CLOCKWISE WILL RAISE
DIFFERENTIAL
COUNTER-CLOCKWISE
WILL LOWER
DIFFERENTIAL
25 TURN
Summary of Contents for IntelliPoint RF RGL Series
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Page 6: ...Contents...
Page 8: ...Section 1...
Page 22: ...Section 3...
Page 30: ...Section 5...
Page 38: ...Section 7...
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Page 43: ...35 IntelliPoint RF RML Series Control Drawings 7 1 FM Control Drawings Continued...
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Page 45: ...37 IntelliPoint RF RML Series Control Drawings 7 1 FM Control Drawings Continued...
Page 46: ...IntelliPoint RF RML Series Control Drawings 38 7 1 FM Control Drawings Continued...
Page 47: ...39 IntelliPoint RF RML Series Control Drawings 7 1 FM Control Drawings Continued...
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Page 53: ...45 IntelliPoint RF RML Series Control Drawings 7 3 Adding a Padded Capacitor...
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Page 56: ...Appendix A...
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