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RMTXX1 Series - IntelliPoint RF™ Instruction Manual
3.2
Adjustable Differential Controls
DIFFERENTIAL
SP
POWER
GREEN
ALARM
OUTPUT CURRENT
8mA - ALARM
16mA - NORMAL
22mA - FAULT
8mA - NORMAL
16mA - ALARM
5mA - FAULT
FAILSAFE
FAILSAFE
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.
RMT 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 Alarm and Normal
points switch.
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 3-2 for location of adjustments. For calibration of
adjustable differential units, see Section 3.3.5
CLOCKWISE WILL RAISE
OPERATING LEVEL
COUNTERCLOCKWISE
WILL LOWER OPERATING LEVEL
RED
UNUSED
HLFS
LLFS
HLFS
LLFS
PRESS FOR FUNCTION CHECK
Figure 3-2
Differential Adjustment
SETPOINT
(25 Turn)
0-60 SECONDS
REV
TD
FWD
POST
REV
TD
FWD
16
DIFFERENTIAL
CLOCKWISE TO RAISE
DIFFERENTIAL
(25 Turn)
COUNTERCLOCKWISE
TO LOWER DIFFERENTIAL
TP1
TIME DELAY
0
60
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