![](/images/new-backgrounds/1300280/30028027x1.webp)
Shorting Wire
22
WARNING: When removing a sensor from
!service, the appropriate sensor plug must be installed to ensure proper instrument operation. Toxic/O2 Sensor Plug P/N
P/N
8.4.1TOXIC/OXYGEN SENSOR REMOVAL/ REPLACEMENT
•To remove a toxic or oxygen sensor, grasp the sensor and lift it straight up. Use care to avoid bending the sensor pins.
WARNING: When removing a toxic sensor for
!storage, connect a shorting wire to the two pins as shown.
•New toxic sensors are shipped with a shorting wire attached. Remove the shorting wire from the new sensor.
•Immediately install the sensor in the instrument. Never apply pressure to the area inside of the black
8.4.2COMBUSTIBLE SENSOR REMOVAL/ REPLACEMENT
•To remove the combustible sensor, grasp the sensor and lift it straight up.
•Press the new sensor firmly into the sockets on the PC board.
8.5CHANGING THE INTERNAL FILTER
If the internal dust filter/water stop becomes blocked, a PUMP FAULT alarm will result. The filter must be replaced immediately before continuing operation. To remove and replace the internal dust filter/water stop from the instrument:
•Unscrew and remove the knurled sample inlet fitting from the instrument as shown in Figure 6.
•Grasp the dust filter/water stop from the instrument and pull straight out to remove.
•Replace the dust filter/water stop making sure that the larger diameter opening of the filter is facing inward.
•Replace the knurled sample inlet fitting.
NOTE: The ATX612 will remain in a PUMP FAULT condition if operation is attempted with the dust filter/water stop removed.
9. REPLACEMENT PARTS
The following items numbers refer to the exploded view drawing on pages 24 and 25.
ITEM PART NUMBER DESCRIPTION (QTY)
1
2
3
4 | Chassis (1) |
5
6
or | Alkaline Battery Pack | |
7 | Case Gasket (1) |
8
9
10 | Speaker (1) |
11
12
13
14
15 | RFI Screen (1) | |
16 | Case Top (1) | |
17 | Key Pad (1) | |
18 | Alarm Lens (1) | |
19 | Alarm Lens Gasket (1) |
Figure 6 | 23 |