Xylem SDI-12 Data Logger iRIS 220, iRIS 320, iRIS 350, iRIS 150, iRIS 300 - Manual (Page 13)

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3 Installation – All Models
3.1 Removing/Replacing the Electronic Assembly - iRIS 220
The electronic assembly is retained in the case by two end plates and held in place by the two connectors
(I/O and RS232). Follow this procedure to gain access to the printed circuit board (PCB) to change the SIM
card on GSM models (see Section 3.4) or to change the digital input links (see Section 3.5.5).
To Remove:
Undo the two mounting screws at the antenna end of the case (if fitted). Unplug the I/O
connector. Unscrew the two retaining screws on the RS232 connector and remove the connector extension.
The PCB can then be carefully removed by sliding it out of the outer case.
Once the I/O connector and RS232 connector extension have been removed, the PCB is no
longer retained. Take care to prevent the PCB falling out of the case.
To Replace: Reverse the removal procedure to reassemble the unit.
3.2 Opening / Closing the Housing - iRIS 320 / iRIS 320V
The front of the iRIS 320 enclosure is secured by three M5 machine screws with Allen Key® heads.
The two left-hand screws act as links to the hinges and should not be fully unscrewed.
To Open:
Undo the right-hand screw completely and put in a safe place. Undo the two left-hand
screws until their heads are just fully clear of the front’s face. The front should then be able to be swung
open to the left, to a maximum angle of 90.
To Close:
Check that the green gasket is fully installed in its retaining groove. Gently swing the front
closed to the right, pulling it slightly forwards if it appears to catch, before finally pressing it fully home and
then tightening the three M5 screws securely to maintain the IP65 rating of the enclosure.
Fit a new tamper-proof wire seal to the right-hand screw if required for security purposes. Slight adjustment
of the screw may be required to align the holes in the screw and enclosure to enable the seal’s wire to be
passed through.
3.3 Opening / Closing the Housing - iRIS 350 / iRIS 350V
The front of the iRIS 350 enclosure is secured by four M4 machine screws with Phillips® heads.
There are two small plastic hinges on the left side of the case. These are designed to hold the
lid once it is released.
To Open: Lift off the two grey plastic side covers to expose the screws securing the cover. Put them in
a safe place. Undo all four screws. There is no need to remove them completely as they are retained in the
lid. The front cover should then be able to be swung open to the left, to a maximum angle of 90.
To Close:
Check that the black seal is fully installed in its retaining groove and there are no wires likely
to be trapped under the cover. Gently swing the front cover closed to the right, holding it straight while
refitting the screws. Tighten screws securely to maintain the IP66 rating of the enclosure. Replace the grey
plastic side covers. Finally ensure the black rubber sealing cap is refitted to protect the RS232 connector.