Mantracourt T24 User Manual page 455

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Sample Time
Low Power Mode
Battery Type
Usable Capacity
Sensor mA from 5V Excitation
Usage Per 24 Hour Period
Mantracourt Electronics Limited
This is the length of time in milliseconds that the input is sampled before the
value is transmitted.
WARNING - CHANGING THIS VALUE WILL EFFECT THE
INPUT RANGE OF THE SENSOR
The default value is 1000ms allowing for wind speeds from 3.5 mph upward to
be captured.
Unless the transmitter module is non battery powered this should be set to Yes.
In between transmissions the transmitter module will enter sleep mode which,
for some modules such as the strain gauge transmitter module, will have a
massive effect on battery life.
A Reason for not using Low Power Mode would be if using the module in a
Master-Slave arrangement with PC for example. Or if there is less than 40ms
between the sample time and transmit interval.
This is not a parameter of the module but information used by the battery life
guide. You can choose from some preset batteries or choose custom to allow
you to select your own battery capacity. See below. This will also offer to change
the Battery Low Level if the level suitable for the chosen battery is not the level
currently set.
This is not a parameter of the module but information used by the battery life
guide. This is the capacity of the battery in Amp Hours and has a profound
effect on battery life calculations. This capacity needs to be calculated from
battery manufacturer's data sheets to take into account that you can only use
batteries down to 2.1 volts so in the case of twin AA cells this would be 1.05
volts.
Generally the usable capacity will not be as high as that advertised by the
battery manufacturer. Temperature and internal resistance of the battery are not
taken into account in the guide.
This is the current drawn by the sensor; this should be set to 2 mA for the T24-
WSS to provide a conservative battery life guide.
Enter the number of hours per 24 hour period that the module will be turned on
and transmitting.
454
T24 Telemetry User Manual

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