ENMET MRI-5175 - Manual

ENMET Corporation
80003-503
Original April 2011
Page 1 of 2
Page 1 of 2
Guide for MRI-5175 Sensor Replacement
An Oxygen sensor must be replaced when it can no longer be calibrated. Typical sensor life is 3 to 5 years in a 20.9%
oxygen environment.
To replace a sensor, perform the following steps:
Turn off the electrical power.
Open the display panel and remove the four cover (lid) retention screws and remove the lid. See Figure 1.
Remove the old O
2
sensor, by unscrewing it, and replace it with a new sensor. See Figure 1.
Replace cover(lid) with retention screws.
Turn on the electrical power.
Wait 3 – 4 hours, then recalibrate the sensor per the instructions.
MRI-5175 Exterior View
(Optional)
V
+
S
IG
G
N
D
MRI-5175 Lid, Interior View
Sensor Wiring
J8 Sensor Wires
V+ Not Used
Sig Red wire
Gnd Black wire
Figure 1: MRI-5175 Sensor Replacement
Figure 2: Calibration MRI-5175
O2 Sensor
Sensor Wires
To J8
Terminal J8
Power/Fault LED
MENU Switch
SELECT Switch
Calibration Adapter
on Sensor
Menu Select
Po wer/ Fault XXX XXX XXX
% O2 b y vo l.
Cylinder,
Calibration Gas