Connecting The Delta F Oxygen Cell; Acceptable Cable Lengths For Delta F Ranges - GE Moisture Image Series 1 Startup Manual

June 2004
Connecting the Delta F
Oxygen Cell
1-28
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The Delta F Oxygen Cell is available in a general-purpose model with
®
standard or VCR fittings. The oxygen cell can also be mounted in a
weatherproof enclosure (R4) for outdoor applications or an
explosion-proof enclosure (R7) for hazardous areas.
Do not power up a Series 1 without establishing a flow
through the Delta F Oxygen Cell (see page 1-33).
Each model of the oxygen cell has a set of sensing and secondary
electrodes. Make connections from the electrodes on the cell to the
terminal block labeled OXYGEN on the back of the electronics unit
(see Figure 1-17 on page 1-29). For proper operation, make
connections to each set of electrodes using a four-wire shielded cable.
GE Panametrics provides the "O" type cable with 22 AWG leads for
the Delta F oxygen cells.
IMPORTANT: To maintain good contact at each terminal block and
to avoid damaging the pins on the connector, pull the
connector straight off (not at an angle), make cable
connections while the connector is away from the
unit, and push the connector straight on (not at an
angle) when the wiring is complete.
Cable error is a function of cable resistance/foot, length of cable, and
maximum sensor current output. Since higher range sensors have a
greater current output, they have lower acceptable cable lengths.
Larger gauge cable yields longer acceptable cable lengths. Use
Table 1-5 below to determine acceptable installation lengths.
Table 1-5: Acceptable Cable Lengths for Delta F Ranges
Delta F Sensor Range
0-50 ppm and 0-100 ppm
0-1000 ppm
0-10,000 ppm and greater
0-50 ppm and 0-100 ppm
0-1000 ppm
0-10,000 ppm and greater
0-50 ppm and 0-100 ppm
0-1000 ppm
0-10,000 ppm and greater
0-50 ppm and 0-100 ppm
0-1000 ppm
0-10,000 ppm and greater
Caution!
Cable Gauge Max Length
22 AWG
22 AWG
22 AWG
20 AWG
20 AWG
20 AWG
18 AWG
18 AWG
18 AWG
16 AWG
16 AWG
16 AWG
1300 ft
400 ft
100 ft
2100 ft
630 ft
160 ft
3300 ft
1000 ft
250 ft
6600 ft
2000 ft
500 ft
Installation