ENMET ISA-60M with MRI-5175 - Manual (Page 24)

ISA-60M ENMET Corporation
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Table 5: Fault LED Code Sequence
Power/Fault LED Code Indication Sequence
Exit Green-red – green-red – green red-…
Span Green-red-red-red – green-red-red-red – green-red-red-red…
Cal OK Green for 3 seconds
Bad Cal Red for 3 seconds
N OTE : If the calibration process indicates a failure, wait 30 minutes and repeat process or contact ENMET Corporation.
Figure 9: Calibration MRI-5175
6.2 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 10.
Remove the old O
2
sensor, by unscrewing it, and replace it with a new sensor. See Figure 10.
Replace cover(lid) with retention screws.
Turn on the electrical power.
Wait 3 – 4 hours, then recalibrate the sensor per the instructions in Section 6.1.
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 10: MRI-5175 Sensor Replacement
O2 Sensor
Sensor Wires
To J8
Terminal J8
Power/Fault LED
MENU Switch
SELECT Switch
Calibration Cover
on Sensor
Menu Select
Po wer/ Fault XXX XXX XXX % O2 b y vo l.
11Liter Aerosol Gas
Cylinder Assembly
Calibration Cover
(03620-021)
Connection to
Calibration Cover
Flow Regulation Bellows
Valve/Regulator
(Included with Cylinder)