Vaisala HMP228 User's Guide download pdf (Page 33)

Chapter 9 _____________________________________________________________ Other functions

VAISALA _______________________________________________________________________ 31

CHAPTER 9

OTHER FUNCTIONS

Setting the alarm levels

→

MM70 is alarming by beeping and blinking the backlight. The alarm turns

on when the measured value is not between the alarm limits (permissable

area). Alarm level(s) can be set for only one quantity at a time. Set the

alarm levels as follows:

1. Open the MENU: press OPEN.

2. Select Functions, press .

3. Select Alarm, press .

4. Select Quantity and press SET to choose a quantity.

5. Select quantity, press

SELECT.(Only one quantity can be chosen at

a time. Only active quantities can be selected. To change the active

quantities, go to

MENU→ Display→ Quantities and units).

6. Select the first limit, press

SET (if the alarm function is ON, take it

OFF). Set the alarm level by using arrow buttons. Press +/- button

to choose the sign of the alarm level. Press OK to save the setting.

7. Select the second limit, then follow instructions in item 6. The alarm

will go off when the upper limit is exceeded or when lower limit is

gone below.

If you have only one limit, e.g. if you want to detect if the a

reaches

0.9, set the upper limit to 0.9 and the lower limit so low that it never

will be reached (for example 0). Thus, the MM70 will alert when RH

rises above 0.9 a

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Vaisala HMP228 User's Guide Page 33