ENMET EX-5150-MOS - Manual (Page 15)

EX-5150-MOS ENMET Corporation
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5.3 Heater Voltage Settings
Heater Voltages are necessary for MOS sensors. They are preset at the factory and should not require field adjustment.
Do not adjust these voltages unless specifically instructed to do so by
ENMET Corporation Technical Support Staff.
C AUTION : Improper adjustment of heater voltages can damage sensors voiding any warranties and also alter the operating
characteristics of the sensor in such a way that the EX-5150-MOS may not respond to it’s target gas.
5.4 Sensor Replacement
C AUTION : Area must be declassified during sensor replacement.
Sensors should be replaced when they can no longer be calibrated. Replacement sensor part numbers are listed in Section 6.0
of this manual. If you do not know the proper part number for your sensor, be sure to have the
EX-5150-MOS serial number
available when contacting your Distributor or ENMET Corporation Technical Support.
To replace a sensor, it is necessary to open the transmitter housing.
Remove the overlay and screws retaining the PC Board in the enclosure. Refer to Section 3.2, Figure 3.
Remove the sensor connector J8 and sensor
Wire in the new sensor. Refer to the wiring Table in Section 3.2, Figure 3.
After the new sensor has been installed, it is suggested to allow the sensor to stabilize for 24 hours.
A Factory calibration must be performed.
After entering the Maintenance menu, advance to the Zero menu. Then while viewing the Zero menu, hold the magnet over the
M ENU switch for 2-4 seconds.
After 2-4 seconds, an F will appear on the far right hand side of the display. The F indicates that the instrument is in Factory
mode.
Perform the calibration Zero and Span procedures as outlined in Section 5.2. Be sure that the F is present when selecting the
Zero and Span functions.
The Factory calibration sets a calibration window for future standard instrument calibrations.
Only perform a factory calibration when installing a new sensor!!
6.0 Replacement Part Numbers
ENMET replacement part numbers:
Description Part Number
For EX-5150-MOS p/n 10014-008
Sensor, 12 03033-812
Sensor, 13 03033-813
Sensor, 32 03032-832
Sensor, 19 03033-019
For EX-5150-MOS p/n 10014-009
Sensor, 1 03033-109
Regulator 03700-001
Overlay 06000-058
Magnet 50030-001
Calibration Gas, Consult ENMET Distributor or ENMET Corp.
N OTE : See Table 3 for sensor part number and calibration gas reference.
N OTE : See Figure 1 for location of marking on sensor.