Connecting The Delta F Oxygen Cell - GE moisture.iq User Manual

1.9.4 Connecting the Delta F Oxygen Cell

The Delta F Oxygen Cell is available in a general-purpose model with standard or VCR
can also be mounted in a weatherproof enclosure (R4) for outdoor applications or an explosion-proof enclosure
(R7) for use in hazardous areas.
CAUTION! Do not power up the moisture.IQ without first establishing a gas flow through the Delta F
Oxygen Cell (see "Establishing a Gas Flow Through the Oxygen Cell" on page 26).
Each Delta F Oxygen Cell has a set of sensor electrodes and a set of secondary electrodes. For proper operation,
make connections to each set of electrodes using a six-wire shielded cable. BHGE provides the 704-1357-B-Z
cable with 22 AWG conductors for use with Delta F Oxygen cells.
Note: Cable with 16 AWG conductors is the largest cable size that can be easily installed into the moisture.IQ
terminal blocks and the Delta F sensor terminal posts.
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 shorter acceptable cable lengths. Larger gauge
cable results in longer acceptable cable lengths. Use Table 1 below to determine acceptable installation
lengths for your application.
moisture.IQ User's Manual
Table 1: 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
Cable Gauge Max Length
22 AWG 1300 ft
22 AWG 400 ft
22 AWG 100 ft
20 AWG 2100 ft
20 AWG 630 ft
20 AWG 160 ft
18 AWG 3300 ft
18 AWG 1000 ft
18 AWG 250 ft
16 AWG 6600 ft
16 AWG 2000 ft
16 AWG 500 ft
Chapter 1. Installation
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fittings. The oxygen cell
21