Emerson 3081FG - Manual (Page 24)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
2-6 Installation Rosemount Analytical Inc. A Division of Emerson Process Management
Model 3081FG
5. Use high temperature material (alu-
mina wool) to seal around the probe
during insertion. This prevents hot
gases from escaping or cold air from
entering the stack or duct.
6. Initially insert the probe to a depth of 3
in. (76.2 mm) or 1/2 the depth of the
stack or duct refractory, whichever is
greater.
After initial insertion, do not insert the
probe at a rate exceeding 1 in. per mi-
nute (25.4 mm per minute) or damage
to the probe may result due to thermal
shock.
7. After initial insertion, insert the probe at
a rate of 1 in. (25.4 mm) per minute
until the probe is fully inserted.
8. Install anti-seize compound on the pipe
threads and screw the probe into the
process flange or adapter.
NOTE
Use anti-seize compound on threads
to ease future removal of probe.
The electrical conduit port should be
facing down for a horizontal probe in-
stallation. See Figure 2-4. In vertical
probe installations, orient the probe so
the system cable drops vertically from
the probe. Ensure the electrical conduit
is routed below the level of the terminal
block housing. This drip loop minimizes
the possibility that moisture will accu-
mulate in the housing.
9. If insulation was removed to access the
duct work for probe mounting, make
sure the insulation is replaced after-
ward. See Figure 2-4.
If the ducts will be washed down dur-
ing outage, MAKE SURE to power
down the probes and remove them
from the wash area.
c. Locating Model 3081 Transmitter
1. Ensure the Model 3081 Transmitter is
easily accessible for maintenance and
service and for using the infrared re-
mote control (if applicable).
Do not allow the temperature of the
Model 3081 Transmitter exceed 65°C
(149°F) or damage to the unit may
result.
2. The ambient temperature of the trans-
mitter housing must not exceed 65°C
(149°F). Locate the electronics in an
area where temperature extremes, vi-
bration, and electromagnetic and radio
frequency interference are minimal.
3. Locate the Model 3081 Transmitter
within 150 ft (45.7 m) of the oxygen
probe due to wiring and signal
considerations.