ACR Electronics SmartReader Plus Bedienungsanleitung Seite 67

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SmartReader Data Logger
59
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
second period (using the 128 pulses/sec. channel).
2. Decide which mode you want to have your SmartReader 9 count in. For more
information on the two choices you have -- Normal Rate mode and Accumulate mode --
refer to the Counting Modes and Equations section.
3. Connect the Rate Select jumpers to the correct positions for your application, and choose
the corresponding equation or write your own custom equation. Custom equations allow
you to convert raw readings from a circuit (in Hz) to the units you require (for example,
litres per second). See your TrendReader software guide for more information on custom
equations).
4. Connect your transducers or transmitters and check the operation of the logger by
viewing the Realtime readings in TrendReader software. If you can, try and exercise your
transducers (make them change their output) to ensure that everything works properly. If
it does, then you are ready to place your assembly in the field to start logging your data.
1.11.5 Rate Select Connections
The maximum number of pulses the logger can count in any eight-second period is 255, or
about 32 pulses per second. To count more than this, you need to divide the pulse rate down
to less than 32 pulses per second. This can be done by altering the Rate Select jumper
connections.
Figure 9-4: Setting the Rate Select Jumpers
For each pulse channel, the rate select terminal should connect to the 32/sec. terminal (to
count every pulse), to the 64/sec. terminal (to count every second pulse) or to the 128/sec.
terminal (to count every fourth pulse). Do not connect any external device to the 32/sec.,
64/sec., 128/sec. or rate select terminals. These connections are only for selecting internal
rate. For each channel, make sure that one of the 32, 64, or 128/sec. terminals is connected
to its own rate select terminal. If you connect more than one of these at a time for each
channel, the logger will not count pulses. If you do not connect any of these, the logger also
will not count pulses.
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