Thermo Scientific 42iQ, Инструкция по эксплуатации

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Optional Equipment
Lag Volume
Thermo Scientific 42iQ Instruction Manual 9-19
The 42iQ stores the NO signal obtained during the first half of the
solenoid cycle, determines the NO
x
signal during the second half of the
solenoid cycle, and then calculates and updates a NO, NO
2
, and NO
x
signal every 10 seconds. Averages are available then from 10 to 300
seconds.
Figure 9–10. Flow Diagram, Lag Volume
Use the following procedure to test the 42iQ with lag volume option.
1. Set the NO range to 1,000 ppb and the averaging time to 10 seconds.
2. Introduce approximately 800 ppb NO into the 42iQ. Wait for a stable
reading and then record the NO
2
reading. Next, introduce zero air into
the 42iQ. Wait until the instrument reads close to zero (<3 ppb).
Repeat the above procedure two more times. Take the average of the
three NO
2
readings. The average NO
2
reading should be less than 50
ppb.
Lag Volume Test