Chapter 2 Troubleshooting; General Procedures For Troubleshooting; Diagnostic Guide; Diagnosis - OHAUS PA64 Service Manual

2.1 TROUBLESHOOTING
This section of the manual provides guidelines for evaluating the condition and performance of a
balance, and a standard troubleshooting methodology to follow. Follow all directions step by
step. Make certain that the work area is clean. Handle balance components with care. Use an
appropriate Electro-Static Device.

2.1.1 General Procedures for Troubleshooting

1. Do the most obvious, user-level remedies.
2. Perform Ramp check and Service Calibration.
3. Check that internal parts are clean and free of debris.
4. Inspect the motion of the Ratio Beam: it should move up and down freely.
If not, determine if the cause is mechanical binding, or electrical malfunction.
5. Make an electrical check of the Ratio Beam: measure the resistance of the coils
in the Ratio Beam.
6. Check the InCal Mechanism (if applicable). It should move up and down smoothly.
7. Inspect the Load Cell components. Be sure they are clean and that no Flexures are
bent. (If they are, they must be replaced.)
2.2

DIAGNOSTIC GUIDE

Table 2-1 is a Diagnostic Guide designed to help locate the problem area quickly and easily.
The probable causes are listed with the most common cause first. If the first remedy does not
fix the problem, proceed to the next remedy. Before attempting to repair the balance, read all
chapters of this manual to be familiar with the balance components and operation.

2.2.1 Diagnosis

1. Isolate and identify the symptom
2. Refer to Table 2-1, Diagnostic Guide and locate the symptom.
Also consult Table 2-2, Error Codes, for solutions to specific Errors.
3. Follow the suggested remedies in the order they appear.
4. Perform the indicated checks, as summarized in the Section 2.4, General
Troubleshooting Procedures, or see the appropriate section of the manual.
5. Repair or replace the defective part of the balance.
If more than one symptom is observed, approach one area at a time,
and remember that the symptoms may be interrelated.
If a problem arises that is not covered in this manual, contact Ohaus Corporation for further
information.
Pioneer™ Balance Service Manual
CHAPTER 2 DIAGNOSTIC GUIDE
NOTE:
2-1 Ohaus Corporation www.ohaus.com