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IntelliPoint RF RML Series
2.5
Spark Protection
2.6
Circuit Board
POWER
GREEN
2.6.1 Time Delay
Applications involving insulating granulars and insulating
liquids may produce a static discharge that can damage
the electronics. The RF series instrument is supplied with
integral heavy-duty spark protection to prevent static
discharges from damaging the electronic units.
The circuit board is located on the sensing element/circuit
side of the housing (marked on label). Remove the housing
lid to access the status LEDs, time delay adjustment, and
configuration jumpers. See Figure 2-5.
CLOCKWISE WILL RAISE
COUNTERCLOCKWISE
ALARM
WILL LOWER OPERATING LEVEL
RED
UNUSED
ALARM
RELAY #2
FAULT
ALARM
RELAY #2
FAULT
HLFS
FAILSAFE
LLFS
HLFS
FAILSAFE
LLFS
PRESS FOR FUNCTION CHECK
Figure 2-5 Circuit Board (Sensing Element Circuits View)
The TIME DELAY adjustment is located on the
sensing element/circuit board side of the housing. It is used
to help stop an oscillating relay output due to agitation or
waves in the vessel. The time delay
adjustment can be field-adjusted from 0 to 60 seconds. The
unit is shipped with the TIME DELAY setting at zero (0)
seconds.
The Time Delay adjustment is a 270-Degree turn pot and is
at zero seconds when in the full counter-clockwise position.
Do not force the pot past the stop or damage will occur.
SETPOINT
OPERATING LEVEL
(25 Turn)
0-60 SECONDS
REV
TD
FWD
POST
REV
TD
FWD
9
Installation
DIFFERENTIAL
CLOCKWISE TO RAISE
DIFFERENTIAL
(25 Turn)
COUNTERCLOCKWISE
TO LOWER DIFFERENTIAL
PAD TERMINALS
TIME DELAY
0
60
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