Programming Site Data 1-35
March 2008
Active Tw Measurement Use this option to actively compensate the transit-time measurement
in the fluid for widely varying transducer signal delays that result
from large temperature deviations.
IMPORTANT: Consult the factory before activating this option.
1. At the
ADVAN window, press [→] and [F1] (ActTw) to select Active
TW Measurement.
2. Press
[F1] = NO to disable this option, or [F2] = YES to enable Active
TW Measurement. If you select NO, the DF868 returns to the
Advanced Features prompt.
3. If you enable active Tw measurement, the meter requires the
Minimum Tw in µsec. (The range is from 0 to 500 µsec.) Use the
numeric keys to enter the value, and press
[ENT].
4. The meter also requires the Maximum Tw in µsec. (The range is
from 0 to 500 µsec.) Use the numeric keys to enter the value, and
press
[ENT].
Procedure Options After completing the above steps, the meter returns to the Advanced
Features
prompt. Press [EXIT] to return to the Channel PROGRAM
prompt.
• To continue programming the meter, refer to the menu maps in
Appendix A and navigate to the desired menu. Then, proceed to
the appropriate section of this manual for instructions.
• To leave the User Program and retain the previous settings, press
[EXIT] twice and then press [F1] = NO at the SAVE prompt. Any
programming changes will be discarded and you will be returned
to the data display.
• To leave the User Program and return to measurement mode, press
[EXIT] twice and then press [F2] = YES at the SAVE prompt. Your
programming changes will be entered into the meter’s memory,
and you will be returned to the data display.
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