ENMET EX-5175 - Manual (Page 15)

EX-5175-EC ENMET Corporation
11
5.3 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-5175-
EC serial number available when contacting your Distributor or ENMET Corporation Technical Support.
To replace a sensor, it is not necessary to open the transmitter housing.
Turn off the sensor/transmitter.
Remove the set screw from sensor housing base.
Unscrew the sensor housing cover and remove Sensor/PC Board Assembly.
N OTE : Sensor and PC Board are attached and should not be separated from each other.
Place the new Sensor/PC Board Assembly into the sensor housing cover.
Reassemble the sensor housing.
Turn On the sensor/transmitter.
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.
Enter the Maintenance menu, see section 5.0, 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!!
Figure 6: Sensor Replacement
Set Screw
(0.050 inch, 1.27mm Hex Key)
Sensor Housing Base
Sensor /P C Board
Assembly
Sensor Housing Cover