Honeywell DirectLine DL424, Руководство пользователя, Страница: 26 / 38

Calibration
4.3 Calibration Procedures
ATTENTION:
In Table 4-1, under the Press column:

Hold means to hold the button down until the display changes.

Momentarily means to press and release the indicated button.
Table 4-1 Calibration Procedure
Step Operation Press Display
1 Air Calibration
ACal
Hold
(3 seconds)
ACal
Momentarily

ACAL
To cancel, press Mode button.
Air Calibration will be initiated.

The output is held at its current
Percent-of-range value

The display flashes ACAL while on-
line DO and Temperature
measurements are monitored for
stability.
After 20 seconds of stability , the
Sample Calibration Trim value is reset
to 1.0 and a new Air Calibration is
calculated and the display returns to
On-line DO.
Air Calibration will fail if stability is NOT
achieved after 30 seconds

" FAIL " will display to indicate Air
Calibration failure, followed by the
message
Stbl . The previous Air Cal
Factor and Sample Trim values will be
retained.
Press the MODE button to return to On-
line display.
If any errors occur during calibration ,
FAIL will display briefly followed by and
error message. Refer to "On-line
Diagnostics" for a list of error messages
and "What to do". The previous Air Cal
Factor and Sample Trim values will be
retained.
20 DirectLine® DL424/425 Sensor Module User Manual 9/11