815222322 datasheet(20/28 Pages) MAGNETROL

20 / 28 page

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

3.1.2.2 Wide differential point units

1. Turn off the power to the unit.

2. Remove the lead wire from the probe.

3. Turn the zero and span potentiometers fully clockwise.

NOTE: On wide differential units, the zero potentiometer is located

above the span potentiometer.

4. Move the probe level range jumper to the HI position

board. Refer to Figure 9 on page 9.

a. When the probe range jumper (switch) is in the HI

position, a low level is simulated. When it is in the LO

position, a high level is simulated.

b. On remote mounted units, this jumper is located inside

the probe housing on the probe preamplifier board.

Refer to Figure 9 on page 9.

6. Turn on power to the unit.

7. The red LED will be on. Turn the zero potentiometer

fully counterclockwise. Refer to Figure 10 on page 19.

8. Move the probe range jumper (switch) to the low level

position. Refer to Figure 12 on page 20. The LED will

turn off. If not, turn the span potentiometer slowly coun-

terclockwise until the LED turns off. Refer to Figure 10

on page 19.

9. The LED should now turn on and off with movement of

the jumper (switch).

10. The probe range jumper (switch) can now be switched

between the HI and LO positions and the LEDs will go

on and off. The relays will also go on and off accordingly.

If your unit operates as described above, the probe pream-

plifier board, the probe preamplifier cable and amplifier

are functioning correctly.

If your unit does NOT operate as described above, it is

malfunctioning. Perform the following checks:

1. Take DC voltage reading across probe preamplifier

terminals – should be approximately 12 VDC.

2. Take AC voltage reading across probe preamplifier

terminals – should be .1 to .2 VAC.

3. Consult factory – have test data available for discussion.

NOTE: These values can also be taken at probe preamplifier

wiring terminals on remote installations.

815222322 Datasheet(PDF) 20 Page - Magnetrol International, Inc.