Vaisala DMP248 Wartungshandbuch PDF herunterladen (Seite 42)

OPERATING MANUAL_______________________________________________________________

36 _____________________________________________________________________ U263EN-1.4

With some commands (e.g. calibration) the figures are changed using

the arrow keys. When an arrow key is pressed continuously for a

while, the numbers start changing at an increasing rate.

Auto-calibration

• Select 0RUH in the main menu and then again 0RUH in the second

More menu. Select 'U\FDO and then 6HWWLQJV.

• The interval parameter defines the frequency of auto-calibration

cycles. When the transmitter is turned on, the first auto-calibration

takes place after an hour unless the frequency has been set to less

than an hour. After the first auto-calibration, the set frequency is

activated and the auto-calibration takes place e.g. every six hours.

If the setting is correct, press ENT.

• If the setting needs to be changed, press CL and change the setting

with arrow keys; acknowledge the setting with ENT. If the setting

is changed, it becomes valid only after the next auto-calibration

has been completed. If you wish to activate it immediately reset

the transmitter or turn it off.

• This parameter defines the maximum allowed change of the

dewpoint value during the pre-defined G7GSWLPH. If the change in

dewpoint value exceeds the limit, the calibration is not started. The

auto-calibration is done only after process is stabilized. The

transmitter retries untill the calibration is succesfully complited.

Note that normally, this parameter does not have to be changed.

• If the setting is correct, press ENT.

• If the setting needs to be changed, press CL and change the value

with arrow keys; acknowledge the setting with ENT.

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Vaisala DMP248 Wartungshandbuch Seite 42