Owner manual

ENGLISH

12. To check scale accuracy, follow the CorrectWeightVericationprocedure.

WARNING

Unplug the unit before beginning service work. Incorrect use or

connections can cause electrical shock. Only qualied personnel

should perform service work.

If scale assembly and UL circuit are not calibrated, scale can overll

the tank, causing possible explosion and/or vehicle overcharge.

UL CIRCUIT CALIBRATION

NOTE: Alwayscalibratethescalerst.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.

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re-

move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 dis-

play will show “75 lb. ± .04 lbs/.02kg.”

7. Adjust the potentiometer (P1 POT) set screw just until the “HOLD” message

displays. (The potentiometer adjusting screw is located on the circuit board.)

Maintenance Procedures

NOTE:

You must have

a known weight

of 75 lb. ± .01

(34.02 kg ±.005).