EC9830 CO ANALYZER OPERATION MANUAL
2-6 98307600 Rev. C-1
Desired Output (Volts) Terminating Resistance (Ohms)
10 Volts 500 Ohms
5 Volts 250 Ohms
1 Volt 50 Ohms
0.1 Volt 5 Ohms
When using voltage output, the source resistance is 1000 ohms. The recorder or
DAS input resistance should be greater than 500K ohms for a measurement error
no greater than 1%.
2.1.2.2 Sample Gas Connections
Caution
Sample connections to the EC9830 should be
maintained at ambient pressure, with any excess
flow vented to the atmosphere.
The EC9830 requires at least 1.50 slpm (1.0 slpm sample plus 50% overflow) of
particulate-filtered (<5 micron), dry (noncondensing) sample furnished at all
times. A 5 micron inlet filter is necessary to meet USEPA requirements which is
already installed in the A series analyzer.
Tubing used for sample gas and exhaust connections must be ¼ inch OD and
1/8 to 3/16 inch ID. The recommended ID is 5/32 inch. A segment of clean
Teflon® tubing should be purchased to connect the sample source to the sample
inlet. Only use lines and fittings made of stainless steel, Teflon, Kynar®, or glass.
Instructions for Kynar fittings:
Cut the tubing squarely and remove any burrs.
Insert the tubing through the back of the nut until it reaches the tube stop in
the fitting.
Tighten the nut finger-tight plus 1-1/2 to 2 turns. A squeaking sound when
tightening the nut is normal.
All nuts should be re-tightened when the system reaches operating
temperature.
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