Specifications

WARNING

Unplug the unit before beginning any service work.

Improper use or connections can cause electrical shock. Only qualified personnel should

perform service work.

If scale assembly and UL circuit are not calibrated, scale can overfill the tank, causing

possible explosion and/or

vehicle overcharge.

UL CIRCUIT CALIBRATION

NOTE: Always calibrate the scale first. Then remove the (4) screws that hold down the

keypad on the control panel before attempting to calibrate the UL circuit.

1. Remove all weight from the scale platform.

2. Turn on the MAIN POWER.

NOTE: If the unit is just being turned on, the screen will default to display the selected

refrigerant type.

3. Press SHIFT/RESET until "PROGRAM" displays.

4. When the "PROGRAM" message displays, press SHIFT/RESET and ENTER at

the same time. The "FUNC" message displays.

5. Press 6.

NOTE: Any weight on the scale when 6 is pressed will not be shown on the display.

The unit automatically zeros the weight on the scale when 6 is pressed. If you remove the

weight, the display will show the change in total weight but will not show a negative sign.

6. Place a known weight of EXACTLY 75 lbs. on the scale platform. The display will

show "75 lb. ± .04 lbs/.02kg."

7. Adjust the potentiometer (P1 POT) set screw* just until the "HOLD" message

displays.

NOTE: Turning the P1 POT clockwise increases the weight capacity of the scale.

Turning the P1-POT counterclockwise decreases the weight capacity of the scale

Maintenance Procedures