Det-Tronics U9500 Infiniti Gas Transmitter - Manual (Page 35)

95-8444 33 10.1
Hydrophobic Filter Replacement
The hydrophobic filter on the front of some of the
electrochemical sensor housings protects the sensor cell
from contaminants in the environment, and also enables
the operation of the cell in “wet” environments without
plugging its screen. The operator should frequently
inspect the hydrophobic filter for cleanliness. A dirty filter
can significantly reduce the amount of gas that is able to
reach the sensor cell, thereby impairing the ability of the
system to respond to a hazardous condition. If the filter
becomes dirty or if it is damaged, it must be replaced.
To replace the hydrophobic filter, simply unscrew the
existing filter from the housing, then replace it with a new
filter. Use care not to over tighten.
NOTE
A dirty hydrophobic filter can adversely affect the
response of the sensor by blocking the flow of
gas to the sensor cell. If the detector cannot be
calibrated or responds slowly to the calibration
gas, check the condition of the hydrophobic filter
before replacing the sensor cell. The hydrophobic
filter should be clean and squarely seated in the
housing.
PointWatch Detector Replacement
Refer to Figure 9 in this manual for wiring diagram and
the PointWatch manual for installation and replacement
instructions.
SPARE PARTS
• Electronic Module - Specify gas sensor type and with
or without optional relay package when ordering.
Catalytic Combustible Gas
PointWatch Hydrocarbon Gas
Hydrogen Sulfide – Electrochemical
Carbon Monoxide (specify range)
Oxygen
Chlorine
Sulfur Dioxide
• Calibration Gas Kits and spare cylinders - Specify
gas and concentration when ordering.
• Sensor Termination Box.
• Lubriplate grease for threads.
• There are many other accessories available for
use with various sensors. Contact your local
representative or the factory for information.
DEVICE REPAIR AND RETURN
Prior to returning devices, contact the nearest local
Detector Electronics office so that a Service Order
number can be assigned. A written statement describing
the malfunction must accompany the returned device to
expedite finding the cause of the failure.
Pack the unit properly. Use sufficient packing material
in addition to an antistatic bag or aluminum-backed
cardboard as protection from electrostatic discharge.
Return all equipment transportation prepaid to the factory
in Minneapolis.
ORDERING INFORmATION
When ordering, please specifiy:
Model U9500 Infiniti Gas Transmitter
Refer to the U9500 Model Matrix for details
U9500 MODEL MATRIx
MODEL DESCRIPTION
U9500 Infiniti Gas Transmitter
TYPE GAS
A10 Catalytic Combustible
B20 H2S – Hydrogen Sulfide
C30 02 – Oxygen
D40 CL2 – Chlorine
E50 CO – Carbon Monoxide
F60 SO2 – Sulfer Dioxide
G60 NO2 – Nitrogen Dioxide
H60 IR Combustible
TYPE OUTPUT
01 or 02 4-20 mA
04 Relay and 4-20 mA