Orion Lab Star PH111 pH/mV Bench Meter 33
Chapter 6
Troubleshooting
6.1 Meter Troubleshooting
Meter display not powering on:
•
Verify that power cord is fully plugged into meter
and wall outlet
•
The power adapter plug has two prongs used to
lock it onto the meter; ensure the prongs are
properly aligned when connecting it with the meter
•
Check that the wall outlet is functional
•
Press the “Power” key on the meter
Meter not responding to any key presses:
•
Check that the key being pressed is active in the
current meter mode
•
Unplug and reconnect the meter power supply
•
Contact Technical Support
Meter error shown:
•
pH Out of Range, RmV Out of Range, Temperature
Out of Range:
o
Ensure electrode is connected to meter
o
Check that electrode does not have any
damage or cracks
o
Ensure the electrode is properly immersed in
the sample solution, with the electrode sensing
bulb and reference junction submerged below
the top of the sample solution
o
Verify cables do not have any damage
o
Perform a factor reset on the meter
•
pH Electrode Icon:
o
Troubleshoot pH buffers and pH electrode
o
Replace pH buffers
o
Clean and condition pH electrode
o
Replace pH electrode as needed
6.2 Measurement
Troubleshooting
Reading is unstable, slow to stabilize
•
Clean electrode to remove build-up or
contaminants, 0.1M HCl is recommended and
adding pepsin is helpful if protein build-up occurs
•
If electrode was stored dry, soak electrode in
storage solution for at least 30 minutes
•
If electrode is refillable, add electrode fill solution and
ensure the fill hole is uncovered during use
•
Check electrode for damage, cracks or breaks
•
Check cables for damage or breaks
•
Remove any interfering devices from area
•
Replace old electrode with new electrode
•
If sample temperature is changing, allow
temperature to stabilize
Reading freezes on display
•
o
If meter Read Type is set to Auto-Read, press
the “Measure” key to start a new measurement
•
Check electrode for damage, cracks or breaks
•
Check cables for damage or breaks
•
Replace old electrode with new electrode
6.3 Technical Support
Contact our Orion Technical Support team at
1-800-225-1480, +1-978-232-6000 or
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