Chapter 8. Maintenance and Troubleshooting
Model PM880 Portable Hygrometer User’s Manual 131
Chapter 8. Maintenance and Troubleshooting
The PM880 is designed to be maintenance and trouble free. However,
because of process conditions and other factors, minor problems may occur.
The PM880 provides commands to monitor and check its various
components. This section also includes information on some of the most
common problems you may encounter. If you cannot find the information
you need in this chapter, please consult the factory.
CAUTION! Do not attempt to troubleshoot the PM880 beyond the
instructions in this chapter. If you do, you may damage
the unit and void the warranty.
• Checking the Memory Status - page 132
• Checking the Battery Status - page 133
• Testing the Screen - page 135
• Testing the Keypad - page 136
• Testing the Watchdog Timer Circuit - page 137
• Resetting to Factory Default Settings - page 138
• Viewing and Changing Security Settings - page 139
• Updating PM880 Software - page 143
• Removing/Replacing the Batteries - page 150
• Recharging the Batteries - page 151
• Error and Screen Messages - page 154
• Common Problems - page 157
• Replacing and Recalibrating the Moisture Probes - page 160
• Recalibrating the Pressure Sensors - page 161
Note: While the MIS Probe and Factory Calibration options appear on the
Service Menu, they are available only to operators with a Service
level security code. Consult the factory for further information.
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