Bacharach MGS-150, Инструкция по установке и эксплуатации

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MGS-150 Manual
12 6309-9000 Rev 2
Item Description
Enclosure
Access To open the standard sensor enclosure, turn the cable
clamp 1/2 turn counter-clockwise to loosen the internal
nut, depress the clip on top of the enclosure and open.
Reverse to close.
Power 12-24V AC/DC, connect at positions 0V and +V at
connector block CN1.
•
For AC: Jumper JP1 is on, JP2 is off. (See Figure
2 and Figure 3.
•
For DC: Jumper JP1 is off, JP2 is on. (Default
factory setting is DC.)
Use 2 wires, typically 18 AWG (minimum).
Output Connect two wires to terminal block CN2 positions 0V
and V or I for voltage or current, respectively.
•
Connect 4-20mA at CN2 positions 0V and I
•
Connect voltage output at CN2 positions 0V and V
Relay Set
Point P1 sets the trip point for the relay and audible alarm
using the 0- 5V scale (measure at test points 0V and
alarm test point TP1). Default factory setting is 50% of
the range.
Time
Delay A time delay for the operation of the relay and audible
alarm can be selected using jumpers JP5 and JP6.
Default factory setting is zero.
Audible
Alarm The audible alarm can be disabled using jumper JP3.
Default factory setting is enabled.
2.3. Machinery Rooms
There is no absolute rule in determining the number of sensors and their
locations. However, a number of simple guidelines will help to make a
decision. Sensors monitor a point as opposed to an area. If the gas leak
does not reach the sensor then no alarm will be triggered. Therefore, it
is extremely important to carefully select the sensor location. Also
consider ease of access for maintenance.
The size and nature of the site will help to decide which method is the
most appropriate to use. Locations requiring the most protection in a
machinery or plant room would be around compressors, pressurized
storage vessels, refrigerant cylinders or storage rooms or pipelines. The