Magnetrol International Level Switch 961-50A0-010

After unpacking and before installation, perform the following operational check on the unit in a non-hazardous area:

1. Apply proper operating voltage to terminals L1 and L2/N. Power supply ground should be connected to the green ground screw in housing base.

2. Fill a suitable container with liquid.

3. Place transducer gap in the liquid. The relay output should actuate.

4. Remove transducer from the liquid. The relay output should de-actuate. In case of malfunction, consult Section 3.1, Troubleshooting on page 7.

⚠ Caution: This unit contains CMOS electronics which may become damaged by static electricity. Do not touch any semiconductor devices unless you are properly grounded.

The Model 961 level switch may be mounted in a variety of positions as shown in Figures 2 through 5. Model 962 is always mounted vertically.

Proper orientation of the transducer gap will facilitate maximum performance in difficult applications. When the Model 961 is mounted horizontally, the transducer gap must be turned vertically to allow proper drainage of liquid out of the gap.

The wrench flats on the mounting nut are aligned with the transducer gap; therefore, proper transducer mounting can be achieved by aligning the mounting nut flats in a vertical orientation. See Figure 4. For flanged transducers, a vertical gap orientation should be confirmed prior to installing unit to the mating flange.

When installing a Model 961 switch in a nozzle or pipe, the transducer gap must extend into the tank at least one inch beyond the inside tank wall. Refer to Figure 5.

Screw transducer into the opening using a wrench on the transducer mounting nut flats. If flanged, bolt unit to mating flange with proper gasket. Use thread tape or suitable pipe compound on the threads. Do not over-tighten.