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Summary of Contents for LSI LASTEM DMA867
- Page 1 Thermo-hygrometer with current outputs cod. DMA867 and DMA875 User manual INSTUM_01378 Pag. 1/12...
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Page 2: Table Of Contents
Cleaning the antiradiant shield ....................8 Cleaning the measuring elements and the porous filter ............8 Accessories / Spare parts ......................9 Disposal ............................9 How to contact LSI LASTEM ...................... 9 Specifications ..........................10 Models ..........................10 Measuring specifications ..................... 10 Signal outputs specifications .................... -
Page 3: Introduction
LSI LASTEM. LSI LASTEM reserves the right to carry out changes to this product without timely updating of this document. Copyright 2015 LSI LASTEM. All rights reserved. -
Page 4: Product Installation
Thermo-hygrometer with current outputs – User manual 2 Product installation 2.1 General safety rules Please read the following general safety rules in order to avoid injuries to people and prevent damages to the product or to possible other products connected with it. In order to avoid any damages, use this product exclusively according to the instructions herein contained. -
Page 5: Mechanical Mounting
Thermo-hygrometer with current outputs – User manual 2.3 Mechanical mounting Fit the DYA049 or DYA051 supporting collar to the pole at the desired height, usually at 1,5 - 2 m, and tighten the screws using an allen key n. 6. Fix the sensor to the supporting collar by tightening the two bolts indicated with arrows in the picture. -
Page 6: Application Note
Thermo-hygrometer with current outputs – User manual 3 Application note 3.1 Measuring humidity in high temperature environments In very wet tropical areas, humidity values may acquire a very low dynamic range, close to saturation conditions and, at the same time, to have a low temperature dynamic range and very low wind speed values. -
Page 7: Diagnostics
Thermo-hygrometer with current outputs – User manual 4 Diagnostics 4.1 External visual check 1. Check that the external anti-radiant shield is clean and with no dents (a suitably clean shield will have a higher reflecting capacity). 2. Check for the fan (in the forced ventilation models) proper operation. 4.2 Internal visual check Draw out the sensor from the shield and: 1. -
Page 8: Maintenance
This sensor is a precision measurement apparatus. In order to maintain the specified measurement precision over the time, LSI LASTEM recommends check it periodically (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). -
Page 9: Accessories / Spare Parts
(RAEE). For this reason, at the end of its life, the instrument must be kept apart from other wastes. LSI LASTEM is liable for the compliance of the production, sales and disposal lines of this product, safeguarding the rights of the consumer. Unauthorized disposal of this product will be punished by the law. -
Page 10: Specifications
Principle: hygro-capacitive Range: 0 ÷ 100 %rh Accuracy ±1.5 %rh @ 23 °C Resolution 0.1 %rh Responce time: 10' (T90) Dew point section: Measurement calculated conforming to ISO 7726 formulas Other characteristics: Forced ventilation (only DMA867) INSTUM_01378 Pag. 10/12... -
Page 11: Signal Outputs Specifications
Thermo-hygrometer with current outputs – User manual 9.3 Signal outputs specifications Available outputs: 2 Output signal: current with 0 ÷ 20 or 4 ÷ 20 mA scale, selectable Output measure selection: between RH and dew point; temperature scale Maximum output load: 500 Ω... -
Page 12: Ce Conformity Declaration
Product description: Thermo-hygrometer sensor with current outputs. Models: DMA867 Issuer: LSI LASTEM Srl LSI Lastem Srl declare under sole responsibility the above products are made under European directives 2004/108/EC and, specifically to the electromagnetic conformity, with the relevant provision of the following harmonized standards: ...
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