Atec Fluke-7250 Series - Manual (Page 3)

3 Fluke Calibration Series 7250 Ruska Pressure Controller/Calibrator
Pressure units/scales: Select from over
twelve standard units of measure, including
inHg at 0 °C and 60 °F, kPa, bar, psi, inH
2
o at
4 °C, 20 °C and 60 °F, kg/cm2, mmHg at 0 °C,
cmHg at 0 °C, and cmH
2
o at 4 °C, and two user-
defined units.
Head pressure: Automatic correction for head
pressure differences
Absolute mode: The 7250i and 7250 offer
three different methods to make absolute pres-
sure measurements. The barometric reference
option provides the most convenient method
and is available on ranges 15 psi (1.0 bar) and
higher. Alternatively, the vacuum reference
option allows the connection of an external
vacuum pump to the reference port of the
instrument. An onboard vacuum sensor monitors
the reference vacuum and allows for automatic
zeroing in absolute mode. This option provides
the lowest overall uncertainty since it does not
include the additional uncertainty of a second-
ary barometric reference sensor. For pressure to
50 psia (350 kPa) permanent absolute models
are also available. The 7250xi is only available
with the barometric reference option for abso-
lute measurement.
Autovent and autozero: With few keystrokes,
the Series 7250 will vent the test port to atmo-
sphere or automatically zero itself (autovent is
not applicable to permanent absolute models).
Protection of the device under test: Set
upper and lower pressure limits to ensure
protection of the device under test.
Options
The Series 7250 can be provided for gauge
mode operation, or with:
•
optional vacuum (negative gauge) mode for
bidirectional devices
• optional barometric reference for absolute
mode calibrations
• Permanent absolute ranges to 50 psia (350
kPa) full scale which include a tare feature for
simulated gauge mode operation
The Series 7250 Pressure Controller/Calibrator
can easily automate your test and calibration
workload. All are easy to use, easy to main-
tain, and have the reliability, performance and
features that you want. The Series 7250 features
an easy-to-navigate menu structure with full
text descriptions for menus and commands.
The large color display allows the pressure value to be displayed even
when viewing a submenu selection such as the units selection screen
shown above.
All Series 7250s are fully programmable and can store up to 20
separate programs with up to 1000 steps.