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Ishida Setup & Calibration Manual
2.3.2 Calibration For Units With P-780 Circuit Board
Follow the steps below to calibrate an MG-3000 with a P–780 circuit board.
Step
Action Display
1Turn off the scale.
2Press and hold the ZERO and CHG/VAL keys, then press and release the ON/OFF key.
3 Release the ZERO and CHG/VAL keys.
4Wait for the internal counts to display (usually 6 to 7 seconds). C lb
5Proceed to Step 11 for calibration only. Continue with the next step for configuration.
xxxxx
6Press and hold the ZERO key, then press the CHG/VAL key, then release both keys.
xxxxx
7Press the CHG/VAL key until the country code = 20 (USA). Cd
xx
8Press the TARE key. Cb 20
9Press the CHG/VAL key to select the capacity: b = 15 x 0.005 Lb; A = 6 x 0.002 Lb. CAP
x
10 Press the TARE key. CAP b
11 With no weight on the scale, press the ZERO key until the display shows 2000 counts.
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12 Place the full capacity weights on the scale as determined in Step 9. 2000
13 Press the TARE key once.
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14 The span counts should read 17000 ± 1. If not, repeat the process from Step 11. 17000
15 Remove the brass hex bolt on the rear of the indicator. Use a
non-metallic
device to press
the memory switch on the circuit board.
NOTE:
Using a metallic device can damage the
unit. The switch feels like it clicks when pressed.
17000
16 Turn on the scale and test the calibration by placing a known weight on the scale. 17000
17 When calibration is complete, replace the brass hex bolt on the back of the indicator.
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