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Instruction Manual
Hazardous Area Oxymitter DR
b. WESTINGHOUSE MODELS 218, 225, | 5. Adjust potentiometer |
AND 132 (ANALOG) ELECTRONICS | 322.3 millivolts nominal. |
SETUP |
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Before beginning operation, it is important | 6. | Remove voltmeter leads. |
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that the probe heater setpoint of the existing | 7. | Remove jumper wire. |
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electronics be changed to support the Haz- |
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ardous Area Oxymitter DR |
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Probe. The setpoint adjustment procedure |
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required for Models 218, 225, and 132 |
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analog electronics is as follows: |
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1. Open electronics enclosure. |
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2. On temperature controller card, Figure |
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either Pin 2 or Pin 7. |
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3. Set voltmeter to read DC millivolts | TP3 |
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(MV). |
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4. Attach voltmeter with positive (+) lead |
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on TP1 and negative |
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or 7. |
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NOTE |
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The voltage given above is for an am- | PIN 2 | 2 | 3 | 5 | 6 | 7 | 10 12 |
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(PSC) |
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bient (machinery space) temperature |
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of 25°C (77°F). For each degree of am- |
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bient temperature above or below 25°C |
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(77°F), add or subtract 0.242 mV from |
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the nominal. Example: at 31°C (87°F), |
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| PIN 7 (PSC) | P0019 | ||
the nominal voltage of | Figure | |||||||
should be increased (made less nega- | ||||||||
tive) by 10 x 0.242 or 2.42 mV, making |
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the adjusted nominal |
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Rosemount Analytical Inc. A Division of Emerson Process Management |