OHAUS Scout Pro Series, Service Manual

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B-1
A
PPENDIX B FACTORY CALIBRATIONS
B.FACTORY LINEARITY CALIBRATIONS
The Scout Pro service and factory linearity calibrations use three calibration points; zero, mid-scale
and full scale.
B.1 SERVICE CALIBRATION
This calibration is used when an error 2 has been displayed by the balance. The calibration is
performed with no error checking and is saved as a user calibration. It is not a factory calibration
because no data is written to the EEPROM.
1. Start with the unit off.
2. Press and hold both the ON/ZERO Off and the PRINT Unit buttons until the display reads
rAMP.
3. Press and release the PRINT Unit button. The display will show Lin .
4. Press and release the On/Zero Off button. The display will show - C- blinking and then the
first mass value.
5. Place masses totaling this value on the balance and press the On/Zero Off button.
6. Press and release the On/Zero Off button. The display will show - C- blinking and then the
second mass value.
7. Place masses totaling this value on the balance and press the On/Zero Off button.
8. Press and release the On/Zero Off button. The display will show - C- blinking and then
donE followed by Lin .
9. Repeatedly press and release the PRINT Unit button until the display shows END .
10. Press and release the On/Zero Off button. The balance will return to the weighing mode.
B.2 FACTORY CALIBRATION
This calibration must be used when either a PC board or a transducer is replaced.
1. Remove power from the balance.
2. Install an RS232 option with the pins shorted. See Appendix A.3. If the RS232 option is
not available, pins 2 and 7 of IC9 may be shorted using a micro alligator clip. See Figure
B-1.
CAUTIONS
1. Be very careful that no other pins are shorted, this could destroy the IC.
2. Do not attempt to solder the jumper.
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