Compaq MTEK6000 user manual Calibrating the Differential Pressure Transmitter EFM Only

MTEK6000 SERIES USER'S MANUAL

Calibrating the Differential Pressure Transmitter (EFM Only)

NOTE

Pressing esc repeatedly from anywhere within the calibration procedure will back the operator out of calibration mode.

1.Display the differential pressure by pressing F8 or jumping to 040302.

2.Press cal. Enter your password at the optional PASSWORD? prompt, if required.

3.The unit will enter calibration mode. The display will alternate between CALIBRATING and the parameter label (Diff Press “H20 for example).

4.Open both pressure connection valves.

5.Open bypass valve and close both high pressure and low-pressure transmitter connection valves on manifold.

6.Slowly open the high-pressure transmitter connection valve and allow the transmitter’s output to stabilize.

7.Press zero. The display now shows:

ZERO> XX.XXX

NEW?>

XX.XXX represents the unit's default zero value. If the current zero reference matches the unit's default, simply press ent to collect the new point. Otherwise, key in the value of the current reference before pressing ent. The unit should display Calculating . . .

briefly, and then display the new point. Pressing esc instead of ent at this point aborts the operation and returns you to the calibration prompt.

8. Apply the span (full scale) reference to

the differential pressure sensor and wait for the reading to stabilize

9. Press span. The unit now shows:

SPAN> XX.XXX

NEW?>

As with the zero point, if the external reference matches the default span value, simply press ent. Otherwise, key in the current value of the external reference, then press ent. After pressing ent, the display reading should immediately adjust to reflect the new calibration point. Pressing esc instead of ent at this point aborts the operation and returns the operator to the calibration prompt.

10.Steps 5 - 9 are required only once. They may be repeated as often as necessary while in calibration, but only the most recent point will be saved on completion of calibration.

11.To permanently store the results of the calibration press ent, and the unit will prompt Enter to accept Calibration. Simply press ent again to save the calibration. Press esc to abort the calibration.

12.Confirm that the bypass valve is open.

13.Slowly open the high-pressure valve.

14.Open the low-pressure valve.

15.Close the bypass valve.

3-12 January 2002