Bacharach 2772-0803 manual Unpacking, Battery Connection, Mechanical Installation

REMOTE INTELLIGENT SENSOR - AREA MONITOR

2INSTALLATION AND SYSTEM CHECK

The RIS may be installed inside or out. It should be mounted and connected according to the instructions provided below, and in an environment that is within the specified limits detailed in the Product Specification.

WARNING

Failure to comply with these recommenda- tions may void the warranty.

2.1UNPACKING

Carefully check for shipping damage by exami- nation inside and out. In case of damage, retain packing and make an appropriate claim against the carrier.

2.2BATTERY CONNECTION

Open the RIS door with the key provided and reconnect the battery lead at J5 (see Figure 1-2).

NOTE: Do not turn the main system switch, SW1, on at this stage.

2.3MECHANICAL INSTALLATION

See Figure 2-6 for enclosure dimensions and mounting points. When deciding mounting arrange- ments and position, consider the following require- ments:

It should be possible to fully open door for cassette replacement, service and maintenance.

Adequate clearance is required for connection of external wires and pipes through the glands provided.

RIS must be located so that the sampling input tube(s) does not require extending (Section 2.6).

The mounting position should be such that the installation of other equipment will not subse- quently interfere with enclosure access.

It should not be possible for strong light, natural or artificial, to shine directly up the input tube(s). Servicing will be aided if suitable lighting is provided.

NOTE: Ensure the sample inlet tube(s) are correctly inserted in the optics block (see Figures 2-4 & 2-5).

2.4ELECTRICAL INSTALLATION

2.4.1CABLE RECOMMENDATION. When deciding cable size and length, the following criteria should be used.

The maximum permissible volt drop across supply cables and termination at an assumed

500 mA = 1 volt. Therefore cable length and size should be selected so that the maximum resistance of cable and termination is 2 Ohms.

This requirement is achieved by the cable recommendations given below. The voltage mea- sured at J1 terminals 1 and 2 with a system taking a ‘normal’ current of 150-250 mA should be not less than 11.5 volts.

The following guidance on cable size and maxi- mum length should be observed:

2.4.1.1PSU to RIS Input. 18 AWG stranded, screened, copper wire x 300 ft. maximum, or 16 AWG stranded screened copper wire x 450 ft. maximum.

2.4.1.2PSU to Alarm Module. 18 AWG stranded, screened, copper wire x 600 ft. maximum, or 16 AWG stranded screened copper wire x 900 ft. maximum.

2.4.1.3RIS Relay Output to Alarm Module. Approximately 5,000 ft. maximum of 18 AWG stranded, screened, copper wire.

2.4.1.40 - 1V Analog Output. Dependent upon the input impedance of the device being driven. Check with manufacturer. As guidance, with a device having an input impedance of 10 megohm, a run of up to 1,000 ft. of 18 AWG stranded, screened, copper wire should be satisfactory.

2.4.1.54 - 20 mA Analog Output. 18 AWG stranded, screened, copper wire x 500 ft. maximum.

2.4.2POWER SUPPLY AND INPUT CONNEC- TIONS. The power supply enclosure can be mounted adjacent to the RIS, or in some other convenient location. Advice on power supply selection is pro- vided in Section 2.5.

Connect the 12 volt DC input from the external power supply to the J1 interface terminals #1 (0V) and #2 (+12V). Connect external devices/alarms as required.

Instruction 2772-0803 Page 2-1