5
whether the monitor has experienced a transient exposure, or a leak truly exists.
If the ppm level remains above the Low alarm threshold on completion of leak
wait, the Low alarm relay is energized. If the signal continues to increase, the
main alarm relay will be energized and ultimately the high alarm relay. Once the
system enters Low, Main or High alarm, it will remain in that mode until the
problem is cleared and the system is reset.
Figure 4 Control Electronics Diagram
Power Supply:
Refer to the figure 5 for Power Supply diagram. Power is
supplied to the monitor through terminals 1, 2 and 3 of the terminal board. Line
voltage is fed through the fuse on the left side of the monitor (not shown), and to
the diaphragm pump and power supply. The power supply converts AC line
voltage to dc voltage. DC Voltage is fed through the terminal board to all of the
electrical components of the monitor.
Figure 5 Power Supply Diagram
Summary of Contents for IR-SNIF-1
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