User's Manual

24 FIREFLY AMR REFERENCE MANUAL
©
Datamatic.com, Ltd. 2000 - 2004
999,999,999 cubic feet. The sensor constant, cubic feet per rotation, is set in the
configuration data, and is programmable to match the index size of the meter. The meter
reading tracks the meter index incrementing upward as the meter registers consumption.
Profile Data
The unit gathers and stores consumption profile data. The individual profile data
elements are calculated from the change in the meter reading over the interval time, and
then divided by the scale factor. The profile data is gathered according to configurable
parameters, interval length, and scale factor. Valid values gathered range from + 32768 to
–32767; positive and negative consumption is monitored. The data is stored in non-
volatile memory in a LIFO (Last In, First Out) manner. A total of 7,936 intervals are
saved in the LIFO. The profile data is extracted via a wireless link using the
ROADRUNNER X7 handheld computer.
Powering
An attached 3.6 volt lithium battery powers the unit.
Gas FIREFLY Specifications
Functional
Meter reading 9 digit 99,999,999.9 watt-hours, 0.1 watt-hour units; tracks
mechanical register—forward and reverse.
Meter constant User configurable, set to match the drive size of the meter.
Profile data User set interval, between 1 minute and 4 1/4 hours.
8-bit data.
7,936 intervals in FIFO organization.
Example: 60 minutes per interval provides 330 days data.
Operating
Operating temperature
-40° C to +85° C.
Operating voltage 3.6 VDC.
Sensor Magnetic
Radio communications
FCC Part 15. 902-928MHz ISM band .
Data rate 9600bps 1-way, 19200bps 2-way.
Radiated power 1 mW