Teledyne 200A 6.6 4-20 mA Current Loop Output

Teledyne API Model 200A NOX Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
6-8
PRINTED DOCUMENTS ARE UNCONTROLLED
TELEDYNE API recommends that you purchase replacement permeation tubes from:
VICI METRONICS
2991 Corvin Drive
Santa Clara, CA 95051 USA
Phone 408-737-0550 Fax 408-737-0346
The M200A uses 560 cc/min of zero air over the perm tube. Therefore you should order a
permeation tube with a SPECIFIC OUTPUT of 400 to 450 ppb at .560 liter/minute. This will
give you a IZS Span response of 80 to 90% of full scale in the 500 ppb range. Refer to the above
equation for calculating other concentrations and instrument flow rates.
Once the Analyzer and permeation tube have stabilized, the response to the permeation tube is
not expected to change more than ± 5%. If, during a periodic span check, the response varies by
more than 5%, or more importantly, shows drift, then there may be a problem with the Analyzer
or permeation tube, see Section 9.3.9.
Suggested permeation tubes:
NO2 Permeation tube - uncertified 0.4ppm @ 0.5 lpm
NO2 Permeation tube - certified 0.4ppm @ 0.5 lpm
NO2 Permeation tube - certified 0.8ppm @ 0.5 lpm
NO2 Permeation tube - uncertified 0.8ppm @ 0.5 lpm
6.6 4-20 mA Current Loop Output
The current loop option replaces the voltage output of the instrument with an isolated 4-20 mA
current loop. The current outputs come out on the same terminals that were used for voltage
outputs, see Table 2-2-2. See Troubleshooting Section 9.3.3 for setup and calibration.