Myron-l 6P (includes Addendum 10-01) Manual de usuario descargar pdf (Pagina 16)

XII. TROUBLESHOOTING CHART

Symptom Possible Cause Corrective Action

No display, even though Battery weak or not connected. Check connections or replace battery

measurement key pressed (ref. Battery Replacement, pg. 24).

Inaccurate pH readings 1. pH calibration needed (ref. pH Cal., pg. 17). 1. Recalibrate instrument.

2. Cross-contamination from residual pH 2. Thoroughly rinse sensor well.

buffers or samples in sensor well. 3. Recalibrate using fresh buffers (ref. pH

3. Calibration with expired pH buffers. Buffer Solutions, pg. 28).

No response to pH changes Sensor bulb is cracked or an Replace pH/ORP sensor (ref. pH/ORP

electromechanical short caused by an Sensor Replacement, pg. 29).

internal crack.

Will not adjust down to pH 7 pH/ORP sensor has lost KCl. Clean and rejuvenate sensor (ref. Cleaning

Sensors, pg. 25) and recalibrate. If no

improvement, replace pH/ORP sensor

(ref. pH/ORP Sensor Replacement, pg. 29).

pH readings drift or respond 1. Temporary condition due to “memory” Clean and rejuvenate sensor (ref. Cleaning

slowly to changes in of solution in pH sensor well for long Sensors, pg. 25) and recalibrate. If no

buffers/samples or “FAC” is periods. improvement, replace pH/ORP sensor

displayed repeatedly 2. Bulb dirty or dried out. (ref. pH/ORP Sensor Replacement, pg. 29).

3. Reference junction clogged or coated.

Unstable 1. Dirty electrodes. 1. Clean cell cup and electrodes (ref.

Conductivity/TDS/ 2. Test samples greater than 1 megohm. Cleaning Sensors, pg. 25).

Resistivity readings 2. Minimize test sample exposure to air

(ref. Measuring Resistivity, pg. 10).

Unable to calibrate Film or deposits on electrodes. Clean cell cup and electrodes (ref.

Conductivity/TDS Cleaning Sensors, pg. 25).

Resistivity readings much 1. Contamination from previous sample or 1. Rinse cell cup more thoroughly before

lower than expected from pH sensor well. measurement. Ensure pH cap is snugly

2. Carbon dioxide in test sample. in place.

2. See Measuring Resistivity, pg. 10.

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Myron-l 6P (includes Addendum 10-01) Manual de usuario Pagina 16