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Battery charger connection
The supplied battery charger is connected to the instrument by means of the grey 2-pin connector on the bottom
of the unit, as shown in
Figure 1.3
.
Note:
The above connectors have different key-ways to prevent incorrect cable connection.
Figure 1.4 Keypad
1.4.2 Keypad
The instrument is configured and controlled via a 16-key tactile membrane keypad, as shown in
Figure 1.4
.
ON/OFF Key
The ON/OFF key is shown on the top left of the keypad. When turned ON an initialisation screen is displayed on
the LCD showing the instrument’s serial number and software revision. Once this appears, the instrument can be
started by pressing the ENTER key once – the initialization screen is then replaced by a MAIN MENU which
provides access to the remaining functions.
Menus and the menu selection keys
The Portaflow PT500 menus are arranged hierarchally with the MAIN MENU being at the top level. Menu
navigation is achieved by three keys on the right hand side of the keypad which are used to scroll UP and DOWN
a menu list and SELECT a menu item. When scrolling through a menu an arrow-shaped cursor moves up and
down the left hand side of the screen to indicate the active menu choice which can then be selected by pressing
the ENTER (SELECT) key.
Some menus have more options than can be shown on the screen at the same time, in which case the
‘overflowed’ choices can be brought into view by continuing to scroll DOWN past the bottom visible item. Menus
generally ‘loop around’ if you scroll beyond the first or last items.
If you select Exit it usually results in taking you back one level in the menu hierarchy, but in some cases it may go
directly to the ‘Flow Reading’ screen.
Some screens require you to move the cursor left and right along the display as well as up and down. This is
achieved using keys 5 (scroll LEFT) and 6 (scroll RIGHT).
Dual function numerical keypad
The block of keys shown in the centre of the keypad in
Figure 1.4
are dual function keys. They can be used to
enter straight-forward numerical data, select the displayed flow units or provide quick access to frequently
required control menus.
ON/OFF
Scroll LEFT
Scroll RIGHT
Scroll UP
ENTER
(SELECT)
Numerical keypad
with dual function keys
Scroll DOWN