Doran 4100 Manual de operação e serviço - Página 7

Procurar online ou descarregar pdf Manual de operação e serviço para Balanças Doran 4100. Doran 4100 13 páginas. Digital checkweigh scale

DORAN MODEL 4100 OPERATING AND SERVICE MANUAL

1. Locate the scale on a firm, flat surface for calibration, away from wind drafts or

excessive vibration. Level the scale using the bubble level in the scale base.

2. Remove the tower back panel. Remove the 24 gasketed screws to allow

removal of the back panel.

3. Plug in the power and allow the scale to warm up and stabilize for 10 to 15

minutes.

CAUTION: Lethal voltages are exposed, use extreme care!!

4. SPAN coarse calibration DIP switches are called SW2. SPAN fine calibration

potentiometer is located in the lower part of the board and is labeled VR1.

ZERO calibration is adjusted by potentiometer VR2.

5. The SPAN DIP switches are arranged in a binary increasing manner; DIP-1 has

the least effect and DIP-8 has the most effect. Each step up has double the

effect of the preceding step.

Maximum span is attained when all eight switches are closed. Minimum span

is with all switches open.

The factory preset for a 2:1 load cell ratio is SW2-8 and SW2-6 closed.

6. Initial ZERO calibration:

a. Remove weight from the platform.

b. Open SW3-3. The display will show the internal counts of the scale.

c. Preset SW2-8 and SW2-6 to on (closed).

d. Adjust VR2 until the reading on the display is -900 counts.

7. SPAN calibration:

a. Place 1/2 capacity on the platform.

b. Adjust dip switches SW2 until the internal reading is as close to +9100

as the switches will allow. If the reading is too high, then open switches

for less gain. If the reading is too low, then close switches for more gain.

c. Remove the weight and check the ZERO reading. Readjust VR2 until

display reads -900 counts.

d. Place full capacity on the scale and adjust VR1 for a reading of +19100

counts.

e. Remove weight and recheck ZERO reading.

f. Close SW3-3.

8. Final Span Calibration:

MAN001R2