Orbisphere 3600 series - 2.1.8 Instrument Servicing

3600 Analyzer for O
2
Measurement—Operator’s Manual 53
3600O2.OM.E9903
1. Unscrew the cable gland nut. You will find a rubber gasket, then a metal
washer with an interior diameter of 8.3 mm, and then another metal washer
with an interior diameter of 7.5 mm.
2. Pass the cable through the nut, the gasket, and the 8.3-mm washer.
3. Strip off 110 mm of external insulation, and 85 mm of shielding.
4. Pass the cable prepared in this fashion through the 7.5-mm washer.
5. Pinch the shield so that its entire circumference is pressed between the two
washers (see illustration above).
6. Pass the cable into the box, blocking the cable gland.
7. Reattach and tighten the cable gland nut.
8. Strip the wires about 8 mm from their ends.
9. Attach the wires to the corresponding terminal block connections, as follows:
For panel or 19" rack mount instrument terminal blocks:
• Use a small-bladed flat screwdriver to gently push back the spring-loaded
plastic lever on top of the terminal strip connector. This provides an
opening for the wire connection.
• Insert the wire into the connector opening and release the lever to hold the
wire firmly in place.
For wall mount instrument terminal blocks:
• Use a small-bladed flat screwdriver to loosen the screw at the top of the
terminal block connector. This provides an opening for the wire
connection.
• Insert the wire into the connector opening and tighten the screw to hold
the wire firmly in place.
2.1.8 Instrument Servicing
While unauthorized opening of the instrument normally voids the Orbisphere
warranty, it is necessary to open the instrument for wiring connections. The user
also can perform other procedures, explained below.
To do this, make sure that the AC or DC power is disconnected, then remove the
front-panel key, and place the instrument face down. Remove the four 3-mm Allen
head screws, and carefully pull off the rear panel, taking care not to disconnect any
wires. You also must pull off the orange case; carefully turn the rear panel so that
you can slip the orange case over the rear panel.