LSI LASTEM DMA672.1 - DMA867, DMA875, DMA975 and EXP815 models

Thermohygrometers – User manual
LSI LASTEM SRL
INSTUM_04246
Pag. 7 / 17
2.2 DMA867, DMA875, DMA975 and EXP815 models
Code
EXP815
DMA975
DMA875
DMA867
Measurements
°C/RH%
°C/RH%
°C/RH%
°C/RH%
Output
Radio
RS-485
2 x 0/4÷20 mA
Frequency
868 MHz
-
-
Radio transmission
power
25 ± 3 mW
-
-
Radio transmission
distance (line-of-sight)
600 m
-
-
Transmission rate
10 s
-
-
-
Battery life
>2 years
-
-
-
Communication protocol
-
Modbus RTU,
TTY-ASCII
-
-
Configuration
-
Hyperterminal
-
-
RS485 protection
-
Galvanic insulation
(3 kV, UL1577)
-
-
RS485 speed
-
1200÷115 kbps
-
-
Power supply
Battery (AA 3.6 V)
10÷30 Vac/dc
Power consumption
<10 µW stand-by
120 mW in
transmission
1 W
3 W
Electric protections
NO
(electrically
insulated system
Tranzorb and Emifilter
Ventilation
Natural
Forced
Resolution
Temp: 0.01 °C RH: 0.1%
Dipending on data acquisition