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IntelliPoint RF RML Series
3.3.5 Calibration of Adjustable Differential Units (HLFS and LLFS)
FULL CCW
FULL CCW
SP
UNTIL LED
CHANGES
FULL CW
SP
UNTIL LED
CHANGES
3.3.6 High Level Fail Safe Blind Calibration of Control w/Flush Sensing
Element
(Alarm when chute is full at sensor)
RED LED
OFF
RED LED
ON
1/4 TURN MAX.
ON TO OFF
DRY INSULATING
POWDERS
MOIST
GRANULARS
A. Put Fail-Safe switch in HLFS position.
See Section 2.6.3.
B. Turn Set Point adjustor to full counterclockwise (ccw)
position.
C. Turn Differential adjustor to full counterclockwise (ccw)
position as well. See Figure 2-5.
D. Adjust material level to lower point of desired control
band.
E. Slowly turn Set Point adjustor clockwise (cw) until
instrument just operates (LED changes state).
F. Turn Differential adjustor to full clockwise (cw) position
(maximum differential).
G. Raise material level to upper point of desired control
band.
H. Slowly turn the Differential adjustor counter-clockwise
(ccw) until the LED changes state.
I. Select desired Fail-Safe position.
Calibration is Complete
A. Start with sensing element uncovered, (no material at
sensing element), and tuning adjustment full counter-
clockwise (ccw). At this point red LED will be ON.
B. Turn adjustor clockwise (cw) until LED just turns OFF.
C. Test unit by turning adjustor slowly counter-clockwise
(ccw), then clockwise (cw) to determine differential of the
electronics.
If ON/OFF differential of LED is more than one quarter
turn, unit is not operating correctly. Please consult
factory service department for assistance. This is a simple
function test of the electronics.
D. If above operation is satisfactory, then continue turning
adjustor clockwise (cw):
• One (1) turn for granulars containing moisture. (1 = 4PF)
• One half (1/2) turn for dry insulating powders.
Calibration is Complete
19
Calibration
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