Weight Platform Calibration

Control Panel:

The weight platform should be checked for accuracy at least once a month. This calibration will assure that the compressor will shut off when the tank is full (see accompanying figure).



CAUTION: Use of non-refillable tanks will affect platform calibration and will result in over filling of non-refillable tanks. Overfilling could cause the safety valve to "pop-off" releasing a large quantity of refrigerant. If liquid refrigerant comes into contact with the skin or eyes1 personal Injury may result.


1. Place a known 20.4 Kg (45 lb.) weight centered on the platform. The switch should just trip or be very close to tripping with this amount of weight.

2. If the switch is tripped, the mechanism is in calibration. If the switch does not trip, place a 0.9 Kg (2 lb.) weight on top of the 20.4 Kg (45 lb.) weight. This weight should definitely trip the switch. If the switch is tripped, the mechanism is in calibration. If the switch did not trip, the mechanism must be recalibrated.

3. To recalibrate, remove the 0.9 Kg (2 lb.) weight and loosen the lock nut of the trip screw. Turn the trip screw until the switch just trips. Remove the 20.4 Kg (45 lb.) weight.

4. To check, place the 20.4 kg (45 lb.) weight on the platform and repeat step No. 2. Repeat step No. 3 as required. Tighten lock nut of the trip screw when calibration is complete.