C H A P T E R 3
MAINTENANC E AND TR OUBLESHOOTING
Troubleshooting
| Unable to adjust output or | Check the ADJUST ENBL switch; the indicator must be lit for any |
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| parameter | adjustments to be made |
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| Check the MODE or DISPLAY switch; if they do not respond, the |
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| unit may be in measurement calibration mode (see Chapter 3); |
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| press the OUTPUT switch to abort this mode. |
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| Unable to switch DISPLAY, | The unit may be in measurement calibration mode (see Chapter |
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| MODE, SENSOR CAL or | 3); press the OUTPUT switch to abort this mode |
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| PARAMETER modes |
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| Output goes off intermittently | Check that the AC power cord connection is secure; power line |
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| drop outs may reset the unit and when the power is restored, the |
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| output will be off |
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| Check the TE module connections; a high impendance on the TE |
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| load may cause the output to exceed the compliance voltage |
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| momentarily, thus shutting the output off |
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| R Mode set point is not saved | The R mode set point value is not independent from the T mode |
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| set point value; if the control mode is changed from R mode to T |
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| mode, the R set value will change to a value which corresponds to |
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| the temperature, based on C1 and C2 |
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