Panametrics DigitalFlow XMT868i, Руководство по программированию

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Appendix C. Programming the XMT868i Using PanaView™
40 DigitalFlow™ XMT868i Programming Manual
programmed Velocity High Limit value. See Chapter 2, Error Codes , in the Service Manual for a discussion of error
codes.
7. Click [Next Item] to accept the current Acceleration value or enter a new value and click [Next Item].
The default value for the above parameter is 15.0 ft/sec
2
(4.6 m/sec
2
) and values from 0 to 100 ft/sec
2
(0 to 30
m/sec
2
) are acceptable. The E6: CYCLE SKIP error message appears when the calculated fluid velocity changes by
more than the programmed ACCELERATION LIMIT value from one reading to the next. See Chapter 2, Error Codes , in
the Service Manual for a discussion of error codes.
8. Click [Next Item] to accept the current Amp. Discrim Low value or enter a new value and click [Next Item]
.
The amplitude discriminator measures the transducer signal received by the Model XMT868i. The default value for
the above parameter is 14, and values from 0 to 100 are acceptable. The E5: AMPLITUDE error message appears when
the amplitude discriminator falls below the programmed Amp. Discrim Low value. See Chapter 2, Error Codes , in the
Service Manual for a discussion of error codes.
9. Click [Next Item] to accept the current Amp. Discrim High value or enter a new value and click [Next Item] .
The amplitude discriminator measures the transducer signal received by the Model XMT868i. The default value for
the above parameter is 34, and values from 0 to 100 are acceptable. The E5: AMPLITUDE error message appears when
the amplitude discriminator exceeds the programmed AMP. DISCRIM HIGH value. See Chapter 2, Error Codes , in the
Service Manual for a discussion of error codes.
10. Click [Next Item] to accept the current Delta T Offset value or enter a new value and click [Next Item]
.
An offset between the upstream and downstream transit times is specified at this prompt. The default value for the
above parameter is 0

sec, and values from –1000 to 1000

sec are acceptable.
11. Click [Next Item] to accept the current % of Peak value or enter a new value and click [Next Item].
The percentage of peak used to calculate the transit times and Delta T is specified at this prompt. The default value
for the above parameter is 50%, and values from -100 to 100% are acceptable.
Note: This setting is a starting point for detecting the signal. The meter will automatically adjust this value if the
calculated transit time is unacceptable. You can set the limits for this value using the MIN. PEAK% and MAX.
PEAK% discussed on the next page.
12. Double-click on the desired XMIT Sample Size (from 2 to 32).
Both the upstream and downstream transducers transmit ultrasonic pulses in bursts, which consist of a series of
transmit pulses. XMIT Sample Size determines how many bursts are sent in one direction before sending in the other
direction. The default value for the above parameter is 8 and values of 2, 4, 8, 16 and 32 are acceptable.
13. Click [Next Item] to accept the current # of Errors value or enter a new value (0 to 16) and click [Next Item] .
Use this prompt to enter the number of errors the XMT868i can record before it displays an error message. The
default value is 8.
14. Click [Next Item] to accept the current Minimum Percent of Peak value or enter a new value and click [Next Item].
Use this prompt to enter the minimum percent of peak that the XMT868i can use to measure transit time. The
XMT868i accepts values from -100 to 100.
15. Click [Next Item] to accept the current Maximum Percent of Peak value or enter a new value and click [Next Item] .
Use this prompt to enter the maximum percent of peak that the XMT868i can use to measure transit time. The
XMT868i accepts values from -100 to 100.
After responding to the above prompt, the meter returns to the Set Up option window.