DH Instruments E-DWT-10000-AF, Руководство по эксплуатации и обслуживанию

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3. OPERATION
Page 29 © 2008 DH Instruments, a Fluke Company
Range full scale limits are given in the pressure unit that is currently active for that range.
Pressing [+/-] from the MAIN RUN screen provides a shortcut to a momentary view of the
active range.
Many RPM4-E-DWT settings and functions are range specific. See Table 2 for identification
of range specific settings.
For best metrological performance, vent the RPM4-E-DWT Q-RPT before changing ranges.
3.7.3 [UNIT]
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PURPOSE
To select the unit of measure in which RPM4-E-DWT displays pressure values.
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PRINCIPLE
RPM4-E-DWT allows the unit of measure in which pressure values are displayed to be
changed.
RPM4-E-DWT A70M/A7M-AF supports 13 standard pressure units of measure as well as
user defined units. To simplify operation, quick access to up to six units is made available
under the
[UNIT] key. The [UNIT] key contents can be customized by the user to any
configuration of six units (see Section 3.9.6).
Internally, RPM4-E-DWT always operates in Pascal (Pa), the SI unit of pressure. Values of
pressure are represented in other units by the application of conversion factors to convert from
Pa (see Section 7.1.1).
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OPERATION
See Figure 9 and Figure 10 for an E-DWT view and schematic when following this procedure.
To change the active pressure unit of measure for
a range, press [UNIT] from the MAIN RUN screen
while the range is active. The display is:
1psi 2MPa 3kPa
4bar
The cursor is on the number corresponding to the active pressure unit of measure for the
active range.
To change the pressure unit of measure, select the desired unit. Making the selection
returns to the MAIN RUN screen with the selected unit active.
The pressure unit of measure selected is range specific. When in a given range, all functions
and settings are represented in the current measurement unit for that range. However, certain
internal and/or metrological functions (e.g., Q-RPT calibration coefficients) are always represented
in Pa regardless of the current range unit.