815222302 datasheet(17/28 Pages) MAGNETROL

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50-605 Kotron RF Point Model 80/81 Level Switches

4. Turn the zero adjustment counterclockwise until the LED

indicator goes off (the relay will change state), then turn

the control slowly in the clockwise direction until the indi-

cator again comes on. Repeat this on-off operation several

times and leave the LED indicator OFF. This completes

the zero calibration of the wide differential point.

Prior to increasing the level of material in the tank to the

span point, turn the span control twenty full turns CCW.

THE LED CALIBRATION INDICATOR WILL

REMAIN OFF.

6. Raise the level of the material in the vessel to the desired

high level set point.

7. Slowly rotate the span adjustment in a CW direction until

the LED calibration indicator turns ON. The relay will

change state and the wide differential span is now

calibrated. Do not change setting after LED is ON.

NOTE: A second span adjustment check can be made by moving the

span adjustment two (2) turns CCW, then removing the probe

(P) wire momentarily to break the contact. With the probe

reconnected, slowly turn the span adjustment screw in CW

direction until the LED calibration indicator again comes ON.

2.8.6 Time Delay Adjustment

2.8.6.1 Narrow Differential Only

Narrow differential amplifiers are equipped with an

adjustable (0 to 3 sec) time delay. With the time delay

calibration fully CCW, the delay is at minimum and in

the fully CW position, it is at maximum. On standard

units, the delay is effective on rising level, i.e., as the

material level goes above the set point, a time delay will

occur between the LED indicator coming ON and the

relay operating and will eliminate contact chatter in

agitated fluids.

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