Enmet ISA-44-2OD Manual do Utilizador descarregar pdf (Página 13)

ISA-44-2-OD ENMET Corporation

3.3 Sensor Hook-up

The oxygen cell comes packaged in a sealed vapor proof bag. The cell needs to be installed in the remote sensor

enclosure after the enclosure has been mounted. See Figure 6. This procedure is the same as the procedure described

in Section 5.3

The MOS sensor is connected to the ISA-44-2-OD control unit with three conductor wiring, use the correct oiltight

fitting. Two conductors supply heater current to the sensor. The third conductor is a signal wire. Size of heater wire

depends on the distance between the particular sensor and the control unit. See Table 4.

Sensor wires correspond to the normal wire code:

orange – heater

brown – heater ground

blue – signal

Figure 7: Internal View of Sensor Wiring

NOTE: The three color-coded wiring attachments must be performed by the user when replacing the sensor.

Table 4: Recommended Wire Gauge

Distance from Sensor to Control Unit Recommended Wire Gauge

250 feet 16 AWG

350 feet 14 AWG

Longer Distances Contact Factory

CAUTION: After you mount and install the ISA – 44-2-OD, you must adjust the sensor heater voltage (see Section 3.4).

This equipment is usually permanently installed, with sensor, power, and relay wires run through hard conduit. The

enclosure is not punched, so wiring may approach the enclosure from any direction; however, the bottom of the

enclosure is the best wiring entrance surface.

1. The OPERATE switch should be in the HORN OFF position.

2. Insert each set of sensor wires through a conduit; install with a watertight fitting and tighten the fitting by hand.

Be sure to leave enough wire inside the enclosure for easy hook-up to terminals. The location of terminals

corresponding to each sensor is shown in Figure 3, 4 and 7.

Sensor Wiring

FOR 812 / 813 / 814 SENSORS

Position Function Wire Color

1 Signal (Blue)

2 Heater (Orange)

3 Ground (Brown)

Optional

Splash Shield

Sensor Wiring

Terminal

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 31 32

Sem comentários

Enmet ISA-44-2OD Manual do Utilizador Página 13