Vaisala PTU300 Uživatelská příručka stáhnout pdf (Strana 82)

User's Guide ______________________________________________________________________

80 __________________________________________________________________ M210796EN-A

Pressure Compensation Settings

The pressure has an effect on humidity calculations and accuracy.

Therefore, accurate calculations can be achieved only when the

process pressure is taken into consideration.

Note that conversions from mmHg and inHg are defined at 0°C and

for mmH

O and inH

O at 4°C.

NOTE

Pressure compensation is intended to be used in normal air only.

When measuring in other gases, please contact Vaisala for further

information.

Using Display/Keypad

Use display/keypad to set the pressure compensation. To select the

pressure unit using display/keypad see section Changing Quantities

and Units on page 73.

1. Press any of the arrow keys to open the MAIN MENU.

2. Select Measuring and press the right arrow key.

3. Select Pressure compensation and press the right arrow key.

4. Use the up/down arrow keys to select either Fixed: 1013.25hPa

or Measured P for pressure compensation.

5. Selecting Measured P: Press the SELECT key and then exit

the menu.

6. Selecting Fixed: 1013.25hPa: Press the SELECT key, and then

SET. You can move from a digit to another one by pressing the

left/right arrow keys. To change the unit, press the up/down

arrow keys.

7. Press the OK key and then exit the menu.

Using Serial Line

PRES and XPRES

Command XPRES should be used if the value is changed frequently.

Its value is not retained at reset, and when set to 0, last value set with

PRES is used instead. Use the serial line and do the following:

PRES [aaaa.a]

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 172 173

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Vaisala PTU300 Uživatelská příručka Strana 82