Det-Tronics PIR9400 PointWatch Infrared Hydrocarbon Gas Detector - Manual (Page 24)

22 95-8440 9.3
NOTE
Check the new hydrophobic filter to ensure that
the overall length matches the length of the
existing filter, or the reflector tubes if no filter was
present. If the new filter appears longer than the
existing filter, trim off
0.23 inch (slightly less than
1/4 inch) of material from the new filter using a
scissors. Take care to not trim the filter too short,
as this will allow contaminants direct access to the
detector optics and cause nuisance optics faults.
7. If a hydrophobic filter is used, slide a new filter over
the two mounting tubes, being careful not to fold
or crumple it. The filter should be centered loosely
around the two mounting tubes.
8. Carefully slide the mirror/reflector tube assembly into
the hydrophobic filter and seat the reflector tubes
securely into the windows in the base. Again, be
careful not to crumple or fold the hydrophobic filter.
9. Tighten the two captive screws on the top of the
mirror assembly. See Figure 10 (aluminum) or Figure
11 (stainless steel). Tighten the screws evenly. Do
not over-tighten (apply 1 N·m minimum torque).
10. For aluminum models, slide the outer filter assembly
over the mirror assembly. The outer filter should be
oriented with the solid portion toward the base of the
unit. If it is not oriented correctly, the filter assembly
will not slide onto the unit. Slide the inner filter
assembly into the outer filter assembly and rotate
until it is seated securely, then fasten the two captive
screws. See Figure
10 .
11. For the stainless steel model, slide the stainless steel
collar onto the base assembly, then slide the baffle
onto the unit. Place the end cap on the baffle and
rotate it until it is seated securely, then fasten the two
captive screws (apply
1 N·m minimum torque). See
Figure 11 .
12. Calibrate the detector with 50% LFL of the gas that
matches the calibration gas switch position following
the instructions in the “Calibration” section of this
manual.
TROUBLESHOOTING
Use Table 5 to isolate and correct malfunctions with the
PointWatch Detector.
REPLACEMENT PARTS
The detector is not designed to be repaired in the field.
If a problem should develop, refer to the Troubleshooting
section. If it is determined that the problem is caused by
an electronic defect, the device must be returned to the
factory for repair.
DEVICE REPAIR AND RETURN
Prior to returning devices, contact the nearest local
Detector Electronics office so that the Return Material
Identification (RMI) number can be assigned. a
written statement describing the malfunction must
accompany the returned device or component to
assist and expedite finding the root cause of the
failure.
Pack the unit properly. Always use sufficient packaging
material. Where applicable, use an antistatic bag as
protection from electrostatic discharge.
NOTE
Det-Tronics reserves the right to apply a service
charge for repairing returned product damaged as
a result of improper packaging.
Return all equipment transportation prepaid to the factory
in Minneapolis.
NOTE
It is highly recommended that a complete spare
be kept on hand for field replacement to ensure
continuous protection.