Meter Operation; General; Lcd Indications During Normal Operation; Entering Prepayment Tokens Via The Keypad - Landis+Gyr Cashpower Gem Lite User Manual

Meter Operation

4 Meter Operation
4.1

General

In this section the features and functionality of the prepayment meter are described in detail.
4.2

LCD Indications during Normal Operation

During typical operation, the LCD provides the following displays:
Figure 3: LCD Icons during the normal meter operation

Displays the current credit register value to a resolution of 0.1 kWh.

Displays any combination of the credit wedge icons (0 to 4 segments depending on the actual
current credit level in the meter.

Displays the happy face icon, irrespective of the credit register value.

Displays the latching relay status icon in either the closed or open position, depending on
whether the meter is in or out of credit.

Flashes the „kWh‟ icon if the meter is Creep mode (no power or very little power is consumed).
4.3

Entering Prepayment Tokens via the Keypad

Prepayment tokens are entered into the meter by keying in the numbers printed on the credit token via the
keypad. The numbers entered are displayed on the LCD as they are being entered and scroll from right to left,
with a space displayed at every fourth digit for ease of viewing.
Visual feedback is provided by flashing the happy face icon with each key press.
Audible feedback is provided by a „beep‟ on each key press.

Acceptance of a valid prepayment token is automatic. Once a complete token has been entered, the meter
processes it and, depending on the result, displays one of the sequences described in paragraph 4.3.1.
Depending on what sequence is invoked, the keypad could remain locked for a variable period of time i.e. it will
not respond in any way to further key presses.
An incomplete token entry will be timed-out after 30 seconds, after which the LCD reverts to normal operation.
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Incorrect entries can be corrected with the backspace key (left arrow key),
which removes the rightmost digit on the LCD with each press. Two
backspace key presses in quick succession will clear the entire entry.
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