Specifications

Model 17800B Recovery/Recycling/Recharging Unit

If the scale does not respond to testing, verify that the scale cable is plugged into

the main circuit board.

8. Press SHIFT/RESET to exit this mode

CALIBRATING THE SCALE

NOTE: The scale assembly and UL circuit MUST be calibrated when installing

a replacement scale assembly or circuit board. To ensure continued charging

accuracy, periodically confirm the checklist below.

1. Remove all weight from the scale platform.

2. Turn on the MAIN POWER switch.

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

refrigerant type.

3. Press SHIFT/RESET and ENTER until “PROGRAM” displays.

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

time. The "FUNC" message displays.

5. Press 9. The display is blank.

6. Press RECOVER and ENTER at the same time.

7. The DATE message flashes, then"0.00" displays. Enter the current month and year.

For example, if the unit is being calibrated on November 8th, 1998, enter 1,1,9,8

and then press ENTER.

8. The "CAL" message will flash, then the "ZERO" message displays.

9. Be sure nothing is on or touching the scale platform, then press ENTER.

10. The "CAL" message will flash, then the "A1" message displays.

11. Place a certified weight (between 20 and 70 lbs.) in the center of the scale platform.

Enter the weight from the display. For example, to record 20 lbs. on the scale,

press "2,0,0,0" on the keypad, then press ENTER. The display returns to the

vacuum mode.

12. To check scale accuracy, follow the CORRECT WEIGHT

VERIFICATION procedure.

Important:

You must

have a

known

weight of

75 lb. ±

.01/ 34.02

kg. ±005).

Maintenance Procedures