NRI G-13.mft MDB/S1, Operating Instructions Manual

Page: 19 / 65

G-13.mft MDB/S1 F
UNCTION
19
National Rejectors, Inc. GmbH, Buxtehude
4 Function
This chapter describes how the coin validator works, using the route which
an inserted coin takes in the coin validator:
• Coin acceptance and coin rejection
• Coin channels
• Single or double block data-management
• Accepted coin sensors
• Optional string recognition
• Control for external sorting device
• Inhibit coin acceptance
Coin acceptance and coin rejection
Coins inserted into the coin validator pass inductive and optical sensors
which check the coins and there they generate individual measurement
values. Due to the special design and arrangement of these sensors, each
coin is checked for its material properties and dimensions. An upper limit
and a lower limit are stored for each coin type, a so-called acceptance band
so that the coin validator knows whether to accept a coin or not. If the
measured values or the coin are within the acceptance band, the coin is
accepted for sale when it has passed the acceptance gate and accepted
coin sensors, but if they are outside the band, it is rejected and directed into
the return area.
The limit values of the acceptance bands are programmed by the
manufacturer according to the customers’ specifications, but can be
adjusted with the WinEMP PC configuration software or PalmEMP2.
Following a reset operation, the coin acceptance function is disabled
and must be enabled again by the vending machine.
As a standard feature, the G-13.mft refuses each further
acceptance of a coin if the G-13.mft has not been activated by the
vending machine within the last 2 seconds or if the last accepted
coin has not yet been scanned by the vending machine.