ENMET ISA-40 - Manual (Page 7)

ISA-40 Oxygen Monitor ENMET Corporation
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ISA-40 Interior View
Figure 3: Oxygen Cell Installation
3.2 Oxygen Cell Installation
For some ISA-40 systems, single channel systems, and all multichannel systems, remote sensors are connected to the
control unit via wiring. To connect these assemblies to the control unit, see the Wiring Information Tables 2 & 2A
Section 3.2.2. The transducer cells are each packaged in a vapor proof plastic bag to help prevent depletion of useful
life before installation.
3.2.1 Oxygen Cell Installation Inside of Control Unit
The oxygen detection transducer cell is mounted inside the unit. The cell is packaged in a vapor proof plastic bag to
help prevent depletion of useful life before installation. Do not open or puncture the bag before installation to insure
best performance of cell.
1. Remove 4 cover screws to open the control unit and remove screws to remove cell circuit board. See Figure 1 & 3.
2. Carefully remove the cell from the package.
3. Remove the metal shorting clip (or spring) from cell pins. See Figure 3.
4. Plug the cell into the component side of the cell circuit board; center pin to center hole. See Figure 3. Place the
board in the enclosure and replace the screws to secure the cell and circuit board.
5. Wait at least four hours for the cell to stabilize before setting the gain.
6. The life expectancy of oxygen cells is about 14 months; warranty is six months. Remove the cell serial number
tag from the plastic bag, and stick it to the inside of the enclosure. In case of cell warranty problems, refer to this
serial number.
N OTE : If all channels are used with remote sensor assembly, remove the O2 Cell Circuit Board from the interior of the
ISA-40. Reference Table 2 channel 1.
Remove Shoring
Clip or Spring
Bottom View O2 Sensor
••Center Pin – Negative
••Outer Pin + Positive
O2 Cell Circuit Board
w/cell installed on circuit side
O2 Cell
Circuit Board
See note below