EX-5120
ENMET Corporation
12
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-5120
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.
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.
Plug in new Sensor/PC Board Assembly.
Reassemble the sensor housing.
After the new sensor has been installed, it is suggested to allow the sensor to stabilize for several minutes.
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!!
Figure 6: Sensor Replacement
Set Screw
(0.050 inch, 1.27mm Hex Key)
Sensor Housing Base
Sensor /P C Board
Assembly
Sensor Housing Cover
