Operation Manual

Technical data
1. Circle
Parameters Min. Nominal/Type Max. Unit Remarks
Power supply
Supply voltage 220 230 240 VAC
Frequency 50 / 60 Hz
Power dissipation 0.5 0.8 W
Energy measuring
Cumulative
accuracy
1%, ± 0.2W At 25˚C
ambient
temperature
Actual
accuracy
5%, ± 0.5W At 25˚C
ambient
temperature
Permanent memory
Storage capacity 512 kByte
Dimensions
(l × w × h) 81.3 × 72 × 43.5 mm
ZigBee comm unication
Baudrate 250 kbps O-QPSK
Frequency 2400 2483.5 MHz 16 channels
of the 2.4GHz
ISM band
Bandwith 2.0 MHz 5MHz channel
spacing
Recieving sensitivity
(signal to noise ratio)
-92 dBm @ 1% PER
20-byte packet
Transmission power -27 0 3 dBm
2. Circle+
The technical data of the Circle is useable for the Circle+ as well, except that the Circle+
has extra internal memory, a backup-battery and a real time clock. The next specifcation
is specific for the Circle+:
Parameters Min. Nominal/Type Max. Unit Remarks
Real time clock
O p e r a t i n g t i m e w i t h o u t
power supply
6 20 days
Parameters Min. Nominal/Type Max. Unit Remarks
Power supply
Supply voltage 5 Vdc Powered by
USB host
Dissipated power 0.375 W
Connector
USB-A plug
3. Stick