4.1
5
95-8522
SIGNaL DISPLay DEVICE
If a local or remote digital display for indication
of detected gas concentration is required, it is
recommended to utilize a scalable display device
with a clearly marked unit of measurement in % by
volume. Under no circumstances should a %LFL unit
of measure display module be used to display the
PIRVOL signal output.
OPERaTING MODES
Warmup
When power is applied to the PIRVOL, it enters a
Warmup mode (for approximately one minute) in which
it performs diagnostic checks and allows the sensors
to stabilize before beginning normal operation. The
current output during this period is 0 milliamperes. At
the end of the warmup period with no faults present,
the PIRVOL automatically enters the Normal operating
mode. If a fault is present after the warmup, the
current output will indicate a fault.
Figure 4—Junction Box Dimensions in Inches (mm)
3.46
(8.8)
4.7
(11.9)
2.7
(6.9)
5.2
(13.2)
5.86
(14.9)
6.57
(16.7)
1.28
(3.3)
A2307
3.77
(9.6)
1.28
(3.3)
3.46
(8.8)
4.7
(11.9)
2.7
(6.9)
5.2
(13.2)
5.86
(14.9)
B2281
