Vaisala PTU200 Series User's Guide download pdf (Page 13)

CHAPTER 4_____________________________________________________________COMMISSIONING

VAISALA __________________________________________________________________________ 9

CHAPTER 4 COMMISSIONING

Display and keypad

The optional LCD display has an on/off selectable backlight for better

readability at any light conditions. The two rows of the display can be

defined to indicate different kind of information. The keypad of the

display cover can be used to inspect and change the parameters

available.

The format of the display is defined by using the serial command

DFORM (see page 15). There are two rows containing 16 characters

each; the user can define a maximum of 32 characters to be displayed,

16 characters on each row. The following fields in the display format

can be used:

pressure quantities (pressure, average, difference)

three-hour pressure trend and pressure tendency code

temperature quantity and relative humidity

units

error status and stability indicator

number and text fields

The following basic rules apply to the use of the keypad:

1. Use ENT key to acknowledge a new selection.

2. Use CL key to activate a parameter or unit to be changed or to

revert to the original display.

3. Use arrow keys to make a selection between functional

alternatives.

Only the display contrast can be adjusted if the KEYLOCK is ON.

The transmitter displays NO MODIFICATIONS ALLOWED message

for a few seconds before reverting to the original display. It is also

possible to inspect the settings of the transmitter although the

KEYLOCK has been turned ON.

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Vaisala PTU200 Series User's Guide Page 13