Measurement Computing WLS-TEMP - Manual (Page 28)

WLS-TEMP Specifications
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Temperature alarms
Table 11. Temperature alarm specifications
Parameter Specification
Number of alarms 8 (one per digital I/O line)
Alarm functionality Each alarm controls its associated digital I/O line as an alarm output. The input to each
alarm may be any of the analog temperature input channels. When an alarm is enabled, its
associated I/O line is set to output (after the device is reset) and driven to the appropriate
state determined by the alarm options and input temperature. The alarm configurations are
stored in non-volatile memory and are loaded at power on. Alarms will function both in
wireless mode and while attached to USB.
Alarm input modes  Alarm when input temperature > T1
 Alarm when input temperature > T1, reset alarm when input temperature goes below T2
 Alarm when input temperature < T1
 Alarm when input temperature < T1, reset alarm when input temperature goes above T2
 Alarm when input temperature is < T1 or > T2
Note: T1 and T2 may be independently set for each alarm.
Alarm output modes  Disabled, digital I/O line may be used for normal operation
 Enabled, active high output (digital I/O line goes high when alarm conditions met)
 Enabled, active low output (digital I/O line goes low when alarm conditions met)
Alarm update rate 1 second
Memory
Table 12. Memory specifications
Parameter Specification
EEPROM 1,024 bytes isolated micro reserved for sensor configuration
256 bytes USB micro for external application use
Microcontroller
Table 13. Microcontroller specifications
Parameter Specification
Type Three high performance 8-bit RISC microcontrollers
Wireless communications
Table 14. Wireless Communications specifications
Parameter Specification
Communication standard IEEE 802.15.4, ISM 2.4GHz frequency band, non-beacon, point-to-point
Range Indoor/urban: Up to 150' (50 m)
Outdoor RF line-of-sight: Up to 1/2 mile (750 m)
Transmit power output 10 mW (10 dBm)
Receiver sensitivity –100 dBm (1% packet error rate)
RF channels 12 direct sequence channels available, channels 12 – 23 (2.410 – 2.465 GHz)
(software selectable)
Addressing 16-bit PAN (personal area network) IDs per channel (software selectable)
64-bit device address
Encryption 128-bit AES (software selectable)