Compaq MTEK6000 - Manual (Page 38)

MTEK6000 SERIES USER'S MANUAL
3-12 January 2002
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.