User's Manual

Returned errors list
Parameter Min Typ Max Unit
Analog Inputs Accuracy 0.1 %
Analog Input Range 0 2.5 V
Digital I/O 4 (A733 and
A733GSM/GPRS)
2 (A732)
0 (A731)
Output high voltage at -500µA 2.76 V
Output lov voltage at +500µA 0.525 V
Input Digital I/O Zero Level 0.66 V
Input Digital I/O One Level 1.98 V
Pulse Counters 4 (A733 and
A733GSM/GPRS)
2 (A732)
0 (A731)
Pulse Counter Speed 2 pulses/s
Pulse Counter Input Levels (Counting
on Leading Edge)
0 3.3+0.5 V
Sensor Supply Current (Switched
Output)
500 mA
Sensor Settling Time 2 s
Data Memory Size 1024 Slots
Sampling Rate 0 255 samples
/slot
Storage Interval 60 65535 s
Other Interfaces
Serial Interface (3V TTL) Zero Level 0.66 V
Serial Interface (3V TTL) One Level 1.98 V
Battery Management Charge Current
(External Battery)
0.8 A
Radio Subsystem (Receive / Transmit
– Not Valid for A733GSM/GPRS)
Operating Frequency (low-band
version)
4
430 450 MHz
Operating Frequency (high-band
version)
450 470 MHz
Frequency Stability (-20 to +50 C) ±1.5 kHz
Frequency Stability (-30 to +60 C) ±2.5 kHz
4
This parameter represents the alignment range; the switching range can be
limited in the software to a narrower space (even to the extent of a single channel).
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