MODEL 396/396VP/397/398/398VP | SECTION 5.0 |
| TROUBLESHOOTING |
SECTION 5.0
TROUBLESHOOTING
TABLE 5-1. Troubleshooting
Trouble | Probable Cause | Remedy |
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Meter reads off scale. (Display | T.C. element shorted. | Check T.C. element as instructed |
reads overrange.) |
| in Section 4.2 and |
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| replace sensor if defective. |
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|
| Sensor not in process or sample | Make sure sensor is in process with |
| stream is low. | sufficient sample stream (refer to |
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| 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. |
| in Section 4.2 and replace |
|
| 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. |
| in Section 4.2 and replace sensor |
|
| 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 4.1 Replace sensor |
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| if cracked. |
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| Electrode at end of life. | Replace sensor. |
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Transmitter cannot be standardized. | Electrode coated or cracked. | Clean sensor as instructed in |
|
| Sections 4.1. Replace sensor |
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| if cracked. |
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|
Transmitter short spans between | Electrode at end of life, due to | Replace sensor. |
two different buffer values. | old glass or high temperature |
|
| exposure. |
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| Coated glass. | Clean sensor as instructed in |
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| Section 4.1. Replace sensor |
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| if cracked. |
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