Why does my YSI 550A Measuring Instruments display “Over” or “Undr” during calibration?
If your YSI Measuring Instruments displays “Over” or “Undr” during calibration, try replacing the membrane and electrolyte and recalibrating. Cleaning the probe electrodes may also help. If the problem persists, the system may need to be returned for service.
Why won't my YSI 550A Measuring Instruments calibrate?
If your YSI Measuring Instruments will not calibrate, try replacing the membrane and electrolyte. Also, try cleaning the probe electrodes. If the issue persists, the system may require professional service.
Why are my YSI 550A readings inaccurate?
Inaccurate readings on your YSI Measuring Instruments can stem from several factors. First, ensure that the calibration altitude and salinity settings are correct, and then recalibrate the instrument. If you're still experiencing issues, the probe may not have been in 100% water-saturated air during the calibration; try moistening the sponge in the calibration chamber before recalibrating. Another potential cause is the membrane and electrolyte needing replacement, so replace them and recalibrate. Also, ensure the probe electrodes are clean. If none of these steps resolve the issue, the system may require professional service.
What to do if my YSI Measuring Instruments displays “Over” or “Undr"?
If the main display of your YSI Measuring Instruments reads “Over” or “Undr”, it could be due to the sample's oxygen concentration being more than 60 mg/L or 500%, or less than –0.02 mg/L or -0.3%. Also, verify the calibration altitude and salinity settings are correct and recalibrate. Replacing the membrane and electrolyte and recalibrating might resolve the issue. Cleaning the probe electrodes can also help. If problems persist, the system may need to be returned for service.
How to fix a YSI 550A that locks up?
If your YSI Measuring Instruments "locks up", try removing the batteries, waiting 15 seconds for the system to reset, and then replacing the batteries. Replacing the batteries may also resolve the issue. If the problem continues, the system may require professional service.
General| Brand | YSI |
|---|---|
| Model | 550A |
| Category | Measuring Instruments |
| Language | English |
Detailed procedure for calibrating the instrument to measure dissolved oxygen in percent saturation.
Detailed procedure for calibrating the instrument to measure dissolved oxygen in mg/L.
Explains the necessity and method for stirring samples during dissolved oxygen measurement.
Step-by-step guide on how to insert the probe, stir, and record dissolved oxygen readings.
Solutions for instrument not turning on, low battery warnings, or flashing 'OFF' messages.
Steps to resolve issues when the instrument fails to calibrate, including probe and electrolyte checks.
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