Twilight MC-SUP2000H, Руководство пользователя

Страница: 52 / 69

Chapter 6 How to
- 47 -
6.3. How to change between units systems
Use menu window M30 for the selection of unit system in English or Metric system.
6.4. How to select a required flow rate unit
Use menu window M31 to select the flow unit first and then the timing unit.
6.5. How to use the totalizer multiplier
Use window M33 to select a proper totalizer. Make sure that the totalizer pulse is
appropriately speeded. It should not be too fast and neither too slow. A speed of
producing a pulse in several seconds or minutes is preferable.
If the totalizer multiplier is too small, there can be a loss of accumulation pulse
because the output device can output only one pulse in a measurement period
(500milliseconds)
If the totalizer multiplier is too large, the output pulse will be too fewer for the
devices that are connected with the instrument for a quicker response.
6.6. How to open or shut the totalizers
Use M34, M35 and M36 to turn on or turn off the POS, NEG, or NET totalizer
respectively.
6.7. How to reset the totalizers
Use M37 to reset the proper totalizer.
6.8. How to restore the flow meter with default setups
Use M37, when the ‘selection’ message is displayed. Press the dot key first and the
message ‘Master Erase’ will display, then press the backspace key
The master erase step will erase all the parameters entered by the user and setup
the instrument with default values.
6.9. How to use the damper
The damper acts as a filter for a stable reading. If ‘0’ is entered in window M40, that
means there is no damping. A bigger number brings a more stable effect. But
bigger damper numbers will prevent the instrument from acting quickly.
.8Numbers 0 to 10 are commonly used for the damper value.
6.10.How to use the zero-cutoff function
The number displayed in window M41 is called the low-cutoff value. The flow meter
will replace these flow rate values that are absolutely less than the low-cutoff value