Measurement-computing WLS-TEMP Manuel d'utilisateur télécharger pdf (Page 28)

WLS-TEMP Specifications

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)

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Measurement-computing WLS-TEMP Manuel d'utilisateur Page 28

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