LSI LASTEM DMA672.1 User Manual Download Page 7

Page: 7 / 17

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%

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

(electrically

insulated system

Tranzorb and Emifilter

Ventilation

Natural

Forced

Resolution

Temp: 0.01 °C RH: 0.1%

Dipending on data acquisition

Summary of Contents for DMA672.1

Page 1: ...Environmental monitoring solutions Thermohygrometers User manual ...

Page 2: ...tained in this manual may be changed without prior notification No part of this manual may be reproduced neither electronically nor mechanically under any circumstance without the prior written permission of LSI LASTEM LSI LASTEM reserves the right to carry out changes to this product without timely updating of this document Copyright 2020 LSI LASTEM All rights reserved ...

Page 3: ...1 DMA672 x sensors 9 3 2 2 DMA867 DMA875 and DMA975 sensors 10 3 2 3 EXP815 sensor 10 3 3 LSI LASTEM data logger configuration 11 4 Operation check 11 4 1 Calculation of the measurement value based on the sensor analog output 12 5 Maintenance 12 5 1 Cleaning of the anti radiant shield and the porous filter 12 5 2 Sensing element replacement 13 6 Accessories Spare parts 13 7 Disposal 14 8 How to co...

Page 4: ...uitable for tropical weather in continuous high temperature and RH conditions For outdoor application it should be coupled with a anti radiant shield DMA875 and DMA975 are equipped with a high efficiency natural ventilation anti radiant shield with special black painting on the lower surface of the plates ensures that the sensing element is protected by sun rays for accurate air temperature readin...

Page 5: ...ower supply 5 24 Vdc Power consumption 2 mA 5 mA Cable and connector L 3 m free wires 8 wires L 1 m male connector for ELU00x enclosures L 3 m male connector for DWA9xx extension cables L 5 m free wires 8 wires detachable Data logger compatibility M Log ELO008 E Log A Log Pluvi ONE uscita RS232 A Log using ALIEM module Pluvi ONE and A Log with ELU00x enclosures Using DWA9nn extension cable M Log E...

Page 6: ...C 751 table EN 60751 Resolution 0 01 C A M R ELog P1 Response time T90 Typical 4 s 1 m s air flow Long term stability 0 1 C year Relative Humidity Principle Capacitive Measuring range 0 100 Accuracy 1 5 95 DMA672 3 0 5 RH 10 95 Hysteresis 1 Resolution 0 1 A M R ELog P1 0 01 configurable on data logger Response time T90 10 s 1 m s air flow Long term stability 1 year General Information Protection t...

Page 7: ...ance 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 ...

Page 8: ...IEC 751 table EN 60751 Response time T90 Typical 4 s 1 m s air flow Long term stability 0 1 C year Relative Humidity Principle Capacitive Measuring range 0 100 Accuracy 1 5 95 Output Programmable RH or Dew Point Resolution 0 1 Response time T90 10 s 1 m s air flow Long term stability 1 year Hysteresis 1 General Information Protection type IP66 Operative temperature 40 80 C Data logger compatibilit...

Page 9: ...connected with it In order to avoid any damages use this product exclusively according to the instructions herein contained The installation and maintenance procedures must be carried out only by authorized and skilled service personnel Power the instrument in a suitable manner Pay attention and observe the power supplies like indicated for the model in your possession Carry out all connections in...

Page 10: ...4 Run the cable to the data logger 5 Connect the cable to the data logger as specified in the drawing DISACC supplied with the sensor 3 2 2 DMA867 DMA875 and DMA975 sensors 1 Remove the cover from the sensor box and set the dip switches for 0 20 mA or 4 20 mA output Temperature measurement range Relative Humidity or Dew Point output 2 Fix the cover to the box 3 Fix the DYA049 supporting collar to ...

Page 11: ...connected wire 3 Read the value displayed on the multimeter and apply the formula shown in 4 1 Voltage output V 1 Set the multimeter to measure voltage signals and scale in V 2 Connect the red test lead of the multimeter to the wire corresponding to the positive signal Sig and the black test lead to the negative signal wire Sig of the sensor it is not necessary to disconnect the sensor from the da...

Page 12: ...ally at least twice a year it is moreover suggested the replacement of the measure element according to the place of installation in persistent conditions of high humidity pollution dust and chemical substances presence the sensitive element deteriorate faster than the one placed in a location with less adverse conditions It is anyway a good rule to replace the sensitive element at least once ever...

Page 13: ...on the sensor drawing 8 Tighten Case cable gland 9 Montare il coperchio e collegare il cavo a Connettore cavo DWA Mount the case cover and connect the cable to the Connector for DWA cable 6 Accessories Spare parts Code Description SVICA0003 ISO9001 type calibration certificate Temperature SVACA0006 ISO17025 ACCREDIA type calibration certificate Temperature SVICA1003 ISO9001 type calibration certif...

Page 14: ...s and disposal lines of this product safeguarding the rights of the consumer Unauthorized disposal of this product will be punished by the law 8 How to contact LSI LASTEM In case of problem contact the technical support of LSI LASTEM sending an e mail to support lsi lastem com or compiling the technical support request module at www lsi lastem com For further information refer to addresses and num...

Page 15: ...Thermohygrometers User manual LSI LASTEM SRL INSTUM_04246 Pag 15 17 9 CE Conformity Declaration ...

Page 16: ...Thermohygrometers User manual LSI LASTEM SRL INSTUM_04246 Pag 16 17 ...

Page 17: ...Thermohygrometers User manual LSI LASTEM SRL INSTUM_04246 Pag 17 17 ...

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