![7.2 TROUBLESHOOTING WITHOUT ADVANCED DIAGNOSTICS.](/images/new-backgrounds/15372/1537263x1.webp)
MODEL 396P and 396PVP | SECTION 7.0 |
| TROUBLESHOOTING |
7.2 TROUBLESHOOTING WITHOUT ADVANCED DIAGNOSTICS.
Table
TABLE
Problem | Probable Cause |
| Remedy |
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Meter reads off scale. (Display | Defective preamplifier |
| Replace preamplifier (for code 02 |
reads overrange). |
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| sensors). For code 01, replace sensor. |
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| T.C. element shorted |
| Check T.C. element as instructed |
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| in Section 6.1 and |
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| replace sensor if defective. |
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| Sensor not in process. Sample |
| Make sure sensor is in process with |
| stream is low or air bubbles are |
| sufficient sample stream (refer to |
| present. |
| Section 2.0 for installation details). |
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| Open glass electrode |
| Replace sensor. |
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| Reference element open - no contact |
| Replace sensor. |
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Display reads between 3 and 6 pH | Electrode cracked |
| Replace sensor. |
regardless of actual pH of solution |
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or sample. |
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Meter or display indication swings | T.C. element shorted |
| Check T.C. element as instructed |
or jumps widely in AUTO T.C. Mode. |
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| in Section 6.1 and replace |
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| sensor if defective. |
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Span between buffers extremely | T.C. element open |
| Check T.C. element as instructed |
short in AUTO T.C. Mode. |
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| in Section 6.1 and replace sensor |
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| if defective. |
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Sluggish or slow meter indication | Electrode coated |
| Clean sensor as instructed in |
for real changes in pH level. |
|
| Sections 6.2 or Section 6.3.2. |
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| Replace sensor if cracked. |
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| Electrode defective |
| Replace sensor. |
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Transmitter cannot be standardized. | Electrode coated or cracked |
| Clean Sensor as instructed in |
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| Sections 6.2 or Section 6.3.2 |
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| Replace sensor if cracked. |
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| Defective preamplifier |
| Replace preamplifier. |
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Transmitter short spans between | Aged glass electrode or high |
| Replace sensor. |
two different buffer values. | temperature exposure |
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| Electrode coated |
| Clean Sensor as instructed in |
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| Section 6.2 or Section 6.3.2. |
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| Replace sensor if cracked. |
| Air bubbles trapped in sensor end |
| Shake the sensor in solution. See |
| between glass bulb and sensor body |
| Section 2.0 for mounting guidelines. |
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