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2.1Checking Sensor Operation
Use the troubleshooting section in the analyzer instruction manual to determine whether the sensor or analyzer is
1.Disconnect the sensor from the analyzer (or junction box, if using interconnect cable).
2.Clean the sensor using the procedure in Part Three, Section 1.
3.Using an ohmmeter, check all of the measurement point resistance readings shown in Table A below.
Be sure that the ohmmeter is set to its highest range for all infinite (open circuit) resistance readings shown in Table A.
Measurement Points | Correct Resistance Readings |
Between blue and white wires | |
Between red wire and sensor body | Less than 5 ohms |
Between black wire and inner electrode Less than 5 ohms | |
Between black and red wires | Infinite (open circuit) |
Between black and white wires | Infinite (open circuit) |
Between red and white wires | Infinite (open circuit) |
Between red and inner shield wires | Infinite (open circuit) |
Between black and inner shield wires | Infinite (open circuit) |
Between white and inner shield wires | Infinite (open circuit) |
Between outer and inner shield wires | Infinite (open circuit) |
4.If you cannot get the required readings for one or more of the resistance
checks in step 3, the sensor is probably inoperative. Refer to OMEGA | ’s |
warranty/replacement plan for sensor replacement details. If all resistance |
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checks are okay, the sensor may still be inoperative. In this case, more |
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extensive troubleshooting is required. Please consult the OMEGA Customer Service Department for details (see page 12).
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