Fluid Components International 8-66B_12-64B Series Manual Operation - Manual (Page 2)

FLUID COMPONENTS INTL CHAPTER 3 - OPERATION
Models 12-64/8-66 Basic Switch 3 - 2 Doc. No. 06EN003264 Rev. A
Adjustment With The Sensing Element Dry
1. Determine that the sensing element is dry.
2. Apply power to the instrument and allow 10 minutes for the sensing element to become active and stabilize.
3. Locate the potentiometer (R5) and the red LED on the control circuit. (See Figure 3-2.)
4. If the LED is on, turn the potentiometer slowly, clockwise until the LED goes off.
Note: If the LED does not turn off set the switch in the wet condition.
With the LED off, turn the potentiometer slowly, clockwise one quarter turn past the point at which the LED just
goes on. The potentiometer may have up to a quarter turn of hysteresis in either direction. If the mark is
overshot, repeat the procedure.
8-66 Interface Applications Adjustment
Alarm switch point adjustments are conducted in the same manner as liquid level/interface applications with the
exception that better thermal conducting media should be considered as in a dry condition.
Figure 3-1. Setting Alarm Switch Point
Figure 3-2. Control Circuit Outline Drawing