Preparation For Use Low Volume Systems; Method Of Testing With Low Volume Systems - GE Druck DPI 610 User Manual

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:

TASK: P-DISPLAY
DISPLAY
CHANGE
VALUE
K415 Issue No. 1
24V OFF
TASK: P-DISPLAY
ZERO
DISPLAY
mbar
24V OFF
mbar
ZERO INTERNAL SENSOR ?
YES NO
70
TASK: P-DISPLAY 24V OFF
DISPLAY
mbar
PLEASE WAIT . . .