Rice Lake Discovery Series Semi-Micro and Analytical, Ohaus - Manual (Page 45)

EN-41 Ohaus Discovery
4. MAINTENANCE
4.1 Calibration
Periodically verify calibration by placing an accurate weight on the balance and if calibration is required, refer to section 3.7.2.
4.2 Cleaning
If cleaning is required, use a soft cloth dampened with water and a mild detergent. Do not allow liquids to enter the balance. Do not use harsh
chemicals to clean the balance, as the finish may be damaged.
4.3 Troubleshooting
The following table lists common problems, possible causes and remedies. If the problem persists, contact Ohaus or your authorized Ohaus
dealer.
Symptom Possible Cause Remedy
Balance will not turn on • AC power not connected • Connect AC adapter
• AC power adapter defective • Replace AC power adapter
Balance does not display accurately • Improper calibration • Perform calibration
• Unstable environment • Move balance to a suitable location
Cannot calibrate the balance • Calibration menu locked • Turn Calibration menu lock off
• LFT set to on • Turn LFT off
• Unstable weight reading • Eliminate vibration and drafts.
Cannot change Menu settings • Submenu locked • Unlock sub-menu
• LFT set to on • Turn LFT off
Error 7.0 • Unstable weight reading when defining the • Eliminate vibration and drafts.
reference weight.
Error 8.1 • Weight reading exceeds Power On Zero limit. • Clear pan.
Error 8.2 • Weight reading below Power On Zero limit. • Put pan on balance.
Error 8.3 • Weight reading exceeds overload limit. • Clear pan.
Error 8.4 • Weight reading below underload limit. • Put pan on balance.
Error 9.0 • Internal fault. • Return balance for service.
Error 9.5 • Production calibration not present. • Return balance for service.
Error 9.8 • User calibration data not present. (Required for • Calibrate balance.
LFT ON only)
Error 53 • EEPROM checksum error. • Cycle power on, off. I f
balance fails to operate,
return for service.
LOW REF WT • Average piece weight too small. (Warning) • See section 3.5.3.
REF WT Err • Reference weight too small. The weight on the • Increase sample size.
pan is too small to define a valid
reference weight.
------ • Busy (tare, zero, printing) • Wait until completion.
TROUBLESHOOTING TABLE
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