Bacharach Flue-Gas Sample Conditioning System Specifikace stáhnout pdf (Strana 37)

ECA 450 Operation

Instruction 0024-9400

5. The statistics duration is the length of time allocated to collecting data.

Use

∧∨ keys to select desired duration; then press ENTER to make the

selection and display the Statistics Summary screen.

Note: The minimum and maximum duration values are dependent on the

interval. The duration can never be less than the interval, and cannot

record more than 120 readings.

Statistics Duration

5 min

6. The Statistics Summary screen shows both the interval and duration as

chosen in Steps 4 and 5. For example: if the interval was set to

10 seconds, and the duration set for 5 minutes, then emission data will be

collected every 10 seconds over a 5 minute period — for a total of 30

readings from which the average and standard deviation are calculated.

To change the value of either the interval or duration, press ESC to

redisplay the first Statistics screen and repeat Steps 3, 4 and 5.

Statistics Summary

Interval 10 sec

Duration 5 min

Press ENTER to start

7. With the analyzer set up per Section 2.4 Performing a Combustion Test,

press ENTER to begin collecting data for statistical analysis. Before data

is collected, however, the ECA 450 first waits 60 seconds to allow the

sensor readings to stabilize.

Stabilizing Sensors

START in 60 SEC

After 60 seconds as elapsed, the front panel now shows the data as it’s

being collected. Use the

∧∨ keys to scroll through the readings on the

display.

«STAT«(0010)«««NGAS«

In this example, the top line of the display shows that the analyzer is in

its statistics mode; currently taking reading #10; with natural gas as the

fuel. Observe that the reading number increments as data is being

collected at the chosen interval and stored in memory.

Tip: Press ESC to abort the statistical analysis process. At this time the

Statistics mode is turned OFF and the message “Stats Interrupted” is

displayed. Press ENTER to return to the Combustion Test HOLD screen.

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 85 86

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Bacharach Flue-Gas Sample Conditioning System Specifikace Strana 37