Rice Lake Scout Pro Series Portable, Ohaus - Service Manual - Manual (Page 35)

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.