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Caution. The integrity of the fail-safe operation of the zener diode safety barrier devices depends on a Safety Earth
connection which must not have a resistance greater than 1R0 to the application plant earth (ground).
Make the Earth (Ground) and Safety Earth connection at the stud (TS1) – see Fig. 5.2.
On completion of wiring and checks, replace the outer case and secure the clamping brackets to the mounting panel.
5.1.2 Model 006540203 and 006548000 Katharometer Analyser Panel
Access to terminals
Make the electrical connections to the Gas Monitor in accordance with the information given in wiring diagrams in Figs 5.3, 5.4 and
5.5 and Section 5.2.
1)
Remove four screws in the cover of the katharometer unit.
2)
Remove cover to access the terminal block (TB1) inside.
The electrical connections are made at the terminal block (TB1) via the cable gland, or any replacement gland to suit the intrinsically
safe wiring requirements. When the appropriate interconnections have been made, if remote zero is to be used, remove the 510R
dummy remote zero resistor from across terminals 9 and 10 and set the zero adjustment potentiometer on the katharometer to the
approximate mid-point.
Replace the cover when wiring is complete.
Measuring
unit
Tubing
connections
Inlet
Fig. 5.5 Location of Components Inside Case – Model 006539 and 006548 Type Katharometer Units on 006540203 &
Terminal block (TB1)
Zero adjustment
potentiometer
Mounting pillars
006548000 Panels respectively
5 ELECTRICAL INSTALLATION...
Dummy
Remote Zero
resistor.
10
Remove when
9
connecting
remote zero.
10
9
Outlet
17
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