User's Manual

NOMAD
™
- W4-2 SCALES
O
PERATING
I
NSTRUCTIONS
P
AGE
13 of
13
28-Oct-2001
8. SPECIFICATIONS
Power 8.4V battery pack.
Average Consumption 100mA
Charging Input 15V DC @ 450mA max
Load Cells
Impedance 300 - 1000 Ω
Excitation 5V
Sensitivity 0.6µV (0.003% FS)
Radio Link
Frequency 916.5MHz ± 0.2MHz
Tag Reader
Frequency 125kHz ± 0.1kHz
8.1 CERTIFICATION
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
8.2 COMMUNICATION RANGE
The W4 controllers are designed to have a typical communication distance
of 75m from a link unit in a typical glasshouse.
Communication range will be affected by local conditions and no guarantee
can be made of the actual communication range encountered in an
individual situation.
It should be noted that during periods of communication blackout the scales
will continue to function normally with any entered data being transferred
when communication is re-established.