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Install
supplied to the purges until the full installation is complete. If you do any servicing or
rewiring, ensure that the power supply is isolated. During configuration, the system
requires electrical power, compressed air, and open isolating valves.
2.3
Cable requirements
1.
2.
3.
4.
5.
6.
2.4
Selecting location
Rosemount
the weather. The instrument is fully sealed and requires no further enclosures or
protection. The specific location of the instrument depends on the application and user
requirements. Consider the following when choosing a site.
Refer to
1.
2.
3.
4.
8
Power supply to signal processor - seven-core, overall screen, multi-stranded, 6/0.2
2
mm. 0.5 mm
.
NOTICE
Although shielded cable is specified for the interconnecting cable, it is not necessary to
ground the cable.
Current loop output - any suitable two-conductor cable, maximum length depends
on keeping output load within the 500 ohm maximum load requirement.
Contact outputs - any two-conductor cable capable of supplying the power to the
warning device/relay, etc. 250 V, 10 A maximum.
A.C. power - any suitable three-conductor power cable capable of transmitting 50
VA.
Serial data link (if required) - twin twisted pair shielded cable.
Analog inputs - any suitable two-conductor cable; Rosemount
internal impedance of 240 ohms for these inputs.
™
designed the equipment for mounting on boiler ducting or stacks open to
Figure 1-2
for a typical system arrangement.
The site must be accessible at both sides of the duct for servicing the source and
receiver.
The site should be as free from extremes of temperature and vibration as possible.
Permissible ambient temperature range is -4 °F to 158 °F (-20 °C to 70 °C).
Flue gas temperatures should not exceed 572 °F (300 °C) at the point of
measurment.
NOTICE
The instrument can achieve temperatures up to 1200 °F (600 °C), but degradation in
instrument accuracy will occur.
There must be an uninterrupted sight path available between the source and
receiver.
™
instruments have an
Rosemount CCO 5500
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Troubleshooting
