K415 Issue No. 1
70
Preparation for Use Low Volume Systems
Caution:
This calibrator can produce a maximum differential pressure of 120%
full-scale. Make sure any component connected to this calibrator can
withstand this maximum differential pressure.
Use the TASK key to set-up the calibrator for an appropriate test:
Example:
P-DISPLAY.
To record test data for other tasks, set-up the calibrator to either Data log or
Snapshot as required, refer to pages 30 or 31.
Fit an appropriate pressure fitting to both the positive (+) and negative (-) ports
using a bonded seal as shown in Figure B2. Ensure that both fittings are tight.
To generate pressure, start with the volume adjuster wound fully out.
To generate vacuum, start with the volume adjuster wound fully in.
Ensure that the vent valve is open (fully counter-clockwise).
Connect the device or system under test to both the reference (-) and the
pressure port (+). Connect the ribbed arm of the double tubing to the high (+)
pressure input of the device under test.
Note:
To minimize temperature effects, always use double tubing, separating the
arms of the tubing only by the minimum amount necessary to make the pressure
connections. A typical application, P-DISPLAY, showing test connections to a
Magnehelic pressure gauge are shown in Figure B2.
Method of Testing with Low Volume Systems
Connect the device under test to the calibrator and prepare for test as detailed
above.
Close the vent valve (turn fully clockwise).
Zero the calibrator by pressing the ZERO key as in the sequence below:
ZERO
TASK: P-DISPLAY
mbar
CHANGE
VALUE
TASK: P-DISPLAY
DISPLAY
DISPLAY
DISPLAY
24V OFF
mbar
YES
ZERO INTERNAL SENSOR ?
NO
24V OFF
mbar
PLEASE WAIT . . .
TASK: P-DISPLAY
24V OFF
Содержание Druck DPI 610
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