Honeywell 9782 Series - Manual (Page 54)

Conductivity/Resistivity Analyzer/Controller
9782 Series Conductivity/Resistivity Analyzer/Controller - Operator’s Manual 7/99 4-4
4.4 Installing Power Wiring
Procedure
Follow the procedure in Table 4-1 to install AC power wiring.
WARNING
Turn power off at mains before installing AC power wiring.
Table 4-1 Procedure for Installing AC Power Wiring
Step Action
1 Check the tag on the outside of the case to be sure that the voltage rating of the unit
matches the supply voltage at your site.
ATTENTION
The unit may be damaged if you apply power with the wrong voltage.
2 Open the case:
•
Grasp the bottom center portion of the front bezel and pull it downward and toward you
slightly to disengage the bottom of the bezel from the edge of the case.
•
Lift the bezel gently to disengage it from the top edge of the case.
•
Swing the bezel to the left. (The bezel and display assembly is mounted on pivot arms.)
The safety cover with its warning label will be visible.
3 Remove the safety cover by removing the single screw holding it in place.
4 Install a fused disconnect switch in the power line which will be connected to the
Analyzer/Controller.
•
If a 230/240 Vac line is to be connected, use a 0.125 amp fuse.
•
If a 110/120 Vac line is to be connected, use a 0.25 amp fuse.
5 To ensure that the unit meets the requirements of EMC directive 89/336/EEC, install the
power line filter kit supplied with the Analyzer/Controller. Wind three turns of each wire (14
AWG maximum) through the filter core for the two power and protective earth leads as
illustrated in Figure 4-1. The wound filter cores shall be located external to the 9782 case
within 25 cm.
6 Connect the power wiring to terminals L1 and L2/N as shown in Figure 4-1. Connect the hot
side of the line to terminal L1 and the grounded side of the line to terminal L2/N.
If the L2/N side of the line cannot be grounded, add an isolating transformer electrically
between the power supply and the instrument and ground the L2/N terminal.
WARNING
The ground terminal must be connected to a reliable earth ground. If metal conduit is used, connect
a bonding wire between conduits. Do not rely upon the conductive coating of the instrument case to
provide this connection. Failure to observe this precaution may result in serious personal injury.
7 Replace the safety cover and secure it with the screw.
8 Close the case and power up the unit. Do not apply power until the case is closed.