Myron L PS6 - Manual (Page 34)

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Symptom
No display, even though
measurement key pressed
Inaccurate pH readings
No response to pH changes
Will not adjust down to pH 7
pH readings drift or
respond slowly to
changes in buffers/
samples or “FAC” is
displayed repeatedly
Unstable
Conductivity/TDS
readings
Unable to calibrate
Conductivity/TDS
Possible Cause
Battery weak or not connected.
1. pH calibration needed (ref. pH
Cal., pg. 14).
2. Cross-contamination from residual
pH buffers or samples in sensor
well.
3. Calibration with expired pH buffers.
Sensor bulb is cracked or there is an
electromechanical short caused by
an internal crack.
pH/ORP sensor has lost KCl.
1. Temporary condition due to
“memory” of solution in pH
sensor well for long periods.
2. Bulb dirty or dried out.
3. Reference junction is clogged or
coated.
1. Dirty electrodes.
Film or deposits on electrodes.
XVII. TROUBLEShOOTING ChART
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