BULLETIN I-680
3-2-99
3
The output option is selected using a jumper and pin combination. See Figure #4 for location on the
transmitter board. To change the setting,
turn off the power to the unit
and remove the cover. Place
jumpers in the proper locations for the desired proportional output. Replace the cover and restore power
to the transmitter.
The proportional output is
controlled by the concentration of
nitrogen dioxide (See Table #1).
If at any time a value of 0 maDC
or 0 VDC is measured at the
output, the gas transmitter has
had a power or sensor failure (See
5.0 Troubleshooting, Page 4).
TABLE #1 Proportional Output Values
Nitrogen Dioxide
PPM
4 – 20 maDC
Output Level
0 – 1 VDC
Output Level
0 – 5 VDC
Output Level
0 – 10 VDC
Output Level
0.0
4.0
0.20
1.0
2.0
0.2
5.6
0.28
1.4
2.8
0.4
7.2
0.36
1.8
3.6
0.6
8.8
0.44
2.2
4.4
0.8
10.4
0.52
2.6
5.2
1.0
12.0
0.60
3.0
6.0
1.2
13.6
0.68
3.4
6.8
1.4
15.2
0.76
3.8
7.6
1.6
16.8
0.84
4.2
8.4
1.8
18.4
0.92
4.6
9.2
2.0
20.0
1.00
5.0
10.0
4.0 Specifications
Proportional Outputs:
4 – 20 maDC
250
Ω
Maximum
0 – 1 VDC
1000
Ω
Minimum
0 – 5 VDC
1000
Ω
Minimum
0 – 10 VDC
1000
Ω
Minimum
Proportional outputs are field selectable.
Calibration:
The main transmitter module should be re-calibrated every two years.
Contact the factory for re-calibration information and pricing.
Ratings:
Input Power:
24 VAC, 50/60 Hz, 28 VA
Humidity:
10% to 90% (Non-Condensing)
Temperature:
Storage:
-50
o
C to 120
o
C (-58
o
F to 248
o
F)
Operating:
-15
o
C to 40
o
C (5
o
F to 104
o
F)
Installation Category:
II (local level, over-voltage transients less than 500 volts)
Indicators(LED Type):
Green LED:
Power ON
Figure #4 Selection of Proportional Output Option
