Delta-T Devices AP4, User Manual

Page: 48 / 64

Layout and Control
Page 48
The rest of the control keys are push buttons clustered around the display panel on the
lid. The most frequently used keys are duplicated around both sides of the lid, to help
both left and right-handed people.
The most important and useful button, GO, is also found on the porometer head. It does
not matter which one you use.
The main menu is displayed across the bottom of the screen when the porometer is on.
Options are selected and activated using the
» and GO keys described below.
To adjust the contrast use the LCD knob.
The standard QWERTY keyboard on the case of the porometer does not control the
porometer. It is just used for adding optional notes to readings, and for entering the
titles of groups of readings.
Below the keyboard, from left to right, are located
●
the socket for the head lead,
●
a knob to adjust the screen contrast,
●
an input socket with a red light for the battery charger,
●
and an RS232C serial interface socket for sending data to a printer or computer.
Insert leaf
Turn AP4 on
TO TAKE A READING with one hand
Wait 4 or 5 cycles until readings are
steady or until Beep Beep sounds
MAIN MENU:
READ CALIBRATE REVIEW OUTPUT
ON
INSERT lEAF
START
READING CYCLE
ACCEPT
MAIN MENU:
STORE DISCARD
1
2
GO
5
7
GO
4
GO
GO
6
Press GO
Press GO
Press GO
3
1 2.3
2 2.46
3 2.45 s cm
-1
Press GO to store
or GO to discard
>>