Neptune Technology Group NTGADV1201 Water Meter Reader Tool User Manual 01 0664

Neptune Technology Group Inc. Water Meter Reader Tool 01 0664

Manual

FCC ID: P2SNTGADV1201ADVANTAGE TECHNICAL SPECIFICATIONAdvantage is a light weight, compact and water sealed hand held reader. This readercan be used as a water meter installation tool. Also this reader can be used to readand store water meter encoder data up to five readings. This reader is capable ofreading ProRead and Sensus encoders. The reader includes 2 PCBs, a inductiveprobe, a 2x16 LCD display, a charging jack and two key pads. The unit will be in sleepmode until the REVIEW or READ key is pressed. The unit goes to sleep mode after 4minutes if no activities are detected. An inductive probe is attached at the front of thereader to read the encoder data. A belt clip is included at the back of the unit to attachit with the belt.MPU BoardCentral processing unit is a low power Philips micro controller 87L51FC. The microcontroller includes 256x8 RAM and 16kx8 ROM. The micro controller is run by a 19.2MHz crystal. There are two additional chips on the MPU board, 256x8 RAM and 256x8EEPROM. The display is run by -9 volts which is being generated in the board.The RF transmitter is a HX2001manufactured by RFM. This a 914.0 MHz, AM hybridtransmitter. Operating frequency is 913.850 to 914.200 MHz. The RF out power at the50 ohm load is -3 to +2 dBm. Modulation timing on time 3 to 100 micro seconds andturn off time 3 to 30 micro seconds. Operating voltage 2 to 3.8 VDC. See attacheddetails for more specification.I/O BoardThe I/O board is used to generate 12 volt clocks for the encoder power and 5 volt forthe buzzer. The encoder signals are filtered and amplified in this board before thesignal goes to the MPU board for processing. A low voltage detection circuit is used toshut down the unit once the voltage goes below 3.1 volts.Inductive ProbeAn inductive prove is used to power the encoder via a loosely coupledtransformer(inductive coil). During an encoder read the reader supplies 1200 Hz to19.2 kHz signal to the encoder via inductive couple transformer. The returned datafrom the encoder is synchronized with the incoming clock.KeypadTwo key pads are on the display to activate the reading and review the stored data. The unit scans the keypad every 100 msec. Unit can be waken by pressing any of thetwo keys, READ or REVIEW.BatteryA 3.6 volts rechargeable battery is used to power the unit. The battery can be chargedusing a 120 volts charger rated at 85ma, 4.8 volts.
FCC ID: P2SNTGADV1201Draft CopyBy. Mohammed S. AliDate: 11/20/98

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