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Net Safety Monitoring
D
S
ETECTOR
ETUP
S
S
YSTEM
ENSITIVITY
The UV/IRS-H2 fire detector can be adjusted to various sensitivity levels by
setting the detector to respond at a predetermined detector count rate. The
count rate is dependent upon the intensity of the ultraviolet/infrared radiation
reaching the detector, which in turn depends on the type of fuel, temperature,
flame size and distance of flame from the detector.
DIP Switch Access
DIP Switches are used to set the detector's sensitivity and time delay
settings. The DIP Switches are located on the internal Sensor module of the
UV/IRS-H2.
WARNING:
Do not open the fire detector in a classified area. The area
must be de-classified prior to opening the fire head. This detector is ATEX
approved and has a locking collar that requires a 2mm Hex key to open
WARNING:
Do not touch internal components other than the DIP
Switches (see Appendix B, " Electrostatic Sensitive Device (ESD) ")
To access and select Dip switches, follow the steps below:
1. Unscrew Locking Sleeve Collar's 6 set screws and slide it off the
housing
2. Unscrew the Housing Top counter clockwise.
3. Slide a DIP Switch to the ON or OFF position. Refer to Figure 6 and
Table 3 for instructions.
MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X
November 23, 2012
Figure 6: DIP Switch Location
Sensitivity Setting
The adjustable Sensitivity setting is used to optimize the UV/IRS-H2 for
various installations.
When selecting a Sensitivity setting, consider the following points:
-
Size of potential fire
-
Distance between possible fire and detector
-
Environmental factors
Time Delay Setting
Defining the Time Delay allows the Fire alarm signal to delay (for the
specified time), before indicating an alarm. This feature can be beneficial
depending upon the conditions/activities surrounding the detector.
13
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