LSI LASTEM DMA131A Black Globe Temperature Sensor

Specifications

• Product: Black globe temperature sensor (Tg)
• Model: EST131, DMA131A, DMA131.1
• Connector: PN Connector
• Cable Output: None (free 4-wires)
• Principle: Pt100 DIN-IEC 751 table (EN 60751),Pt100 DIN-A (Class A EN60751), RTD 4-wires
• Accuracy: Standard
• Response Time: Digital I2C

Product Usage Instructions

Introduction
The Black globe temperature sensor is designed for environmental monitoring solutions.

Technical Features
The sensor comes with different models and cable outputs. The accuracy is standard, with a response time of Digital I2C.

Installation

General Safety Rules
Refer to manual INSTUM_05290 for safety regulations.

Mechanical Installation
The sensor can be installed on a pole using the DYA032 stand and DYA049 collar, or on a tripod BVA304 with different stands.

Installation on Pole

1. Fix the DYA032 support to the DYA049 collar and mount them on the pole.
2. Fix the Tg sensor to the DYA032 holder using the provided M5 screw.

Installation on Tripod

1. Place tripod BVA304 at the desired location.
2. Screw the stand BVA305/BVA315/BVA320 to the tripod.
3. Fix the sensor to the stand using the N5 knurled knob supplied with the stand.

Electrical Connection
Wiring connections must be performed as a 4-wires Pt100 (DMA131A and DMA131.1 only).

Revisions list

About this manual

The information contained 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 2024 LSI LASTEM. All rights reserved.

Introduction

The standard globe thermometer consists of a black-painted copper sphere with a diameter of 150 mm and a thickness of 0.4 mm. It contains a thermometer with its bulb at the centre of the sphere. Designed as described in the ISO7726 standard Annex B, the main scope of the globe temperature measurement in meteorological applications is the possibility of estimate the Mean Radiant Temperature (Tmrt) which is one of the most important meteorological parameters governing human energy balance in the thermal comfort and heat stress applications.

Technical features

Common technical specifications

Installation

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.
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 a suitable manner. Pay strict attention to the connection diagrams supplied with the instrument.
Do not use the product in case of suspected malfunctions. In case of suspected malfunction, do not power the instrument and contact authorized technical support immediately.

Before you carry-out any operation on electrical connections, power supply system, sensors and communication apparatus:

• Disconnect the power supply.
• Discharge the accumulated electrostatic discharges touching an earthed conductor or apparatus.
  For safety regulations please refer to manual INSTUM_05290.

Mechanical installation
Black globe temperature sensors can be installed on pole, by means of DYA032 stand and DYA049 collar, or on tripod BVA304, using three different types of stands: BVA305, BVA315 or BVA320.

1. Installation on pole
   1. Fix the DYA032 support to the DYA049 collar and mount them on pole.
   2. Fix the Tg sensor to the DYA032 holder using the M5 screw provided.
2. Installation on tripod
   1. Place tripod BVA304 at the place chosen to take measurements.
   2. Screw the stand BVA305/BVA315/BVA320 to the tripod.
   3. Fix the sensor to the stand using the N5 knurled knob supplied with the stand.

Below are some installation examples:

Electrical connection
Wiring connections must be performed as a 4-wires Pt100 (DMA131A and DMA131.1 only), as indicated below:

ANNEX 1 shows the connection diagrams of the various sensors.

Use with LSI LASTEM data logger
If the sensor is used with an LSI LASTEM data logger, proceed with the configuration of the data logger using the 3DOM software:

• Open the data logger configuration.
• Add the sensor by selecting its code (eg DMA131A) from the 3DOM Sensor Library.
• Check the acquisition parameters (input, rate, etc.)
• Save the configuration and send it to the data logger.

For more information about the configuration, refer to the manual of the data logger in use.

Operational check

Check black globe emissivity
To verify the emissivity of the black globe, a comparison can be made between measurements taken with the current sphere and those taken with a new MC2509 sphere (see spare part list), used solely for comparison purposes. The procedure involves comparing the final black globe temperature recorded before the sphere’s removal with the temperature measured after 20 minutes using the new MC2509 sphere. It is crucial that the air temperature and irradiance levels remain consistent, for 20 minutes, with the last recorded values before the globe replacement. If the removed black globe has decreased in emissivity, the temperatures recorded with this sphere will be lower than those measured with the MC2509 sphere.

Check signal output (DMA121A and DMA131.1 sensors only)

Multimeter is required.

1. Set the multimeter to measure signals in resistance and 200 Ω scale.
2. Disconnect the wires from the data logger.
3. Connect A to one test lead of the multimeter and D to the other one. Read the resistance value on the multimeter and obtain the corresponding temperature value indicated in Tab. 1. For example, if the resistance value is 109 Ω, the corresponding temperature is approximately 23 °C.
4. Repeat the previous step with wires B and C. The value read should be the one found between wires A and D.

After check, reconnect the wires to the data logger.

Maintenance

The only required maintenance is regular cleaning of the copper black sphere. This can be performed by spraying clean water onto the globe and then wiping it down with a cotton cloth to remove any dust and dirt stains.

Calibration of the sensor is recommended every two years.

Handling
The product, or part of it, is fragile, avoid mechanical shocks, abrasions or scratches on the surface and globe.

Storage, packaging, preservation, delivery

For storage and preservation, respect the temperature (-20÷80 °C) limits. Avoid direct sun exposure.
For delivery and storage, use the packaging supplied with the product.
Upon receipt of the material, visually check the package for signs of crushing or perforation; in the presence of these signs, check the integrity of the product inside.

Disposal
This product is a device with high electronic content. In accordance with the standards of environmental protection and collection, LSI LASTEM recommends handling the product as waste of electrical and electronic equipment (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.
Recycle or dispose of the packaging material according to local regulations.

Accessories and spare parts

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 numbers below:

• Phone number +39 02 95.414.1 (switchboard)
• Address: Via ex S.P. 161 – Dosso n. 9 – 20049 Settala, Milano
• Web site: www.lsi-lastem.com
• Commercial service: info@lsi-lastem.com
• After-sales service: support@lsi-lastem.com, Repairs: riparazioni@lsi-lastem.com

ANNEX 1

EST131 sensor schematic drawing

DMA131A sensor schematic drawing

DMA131.1 sensor schematic drawing

PRTEA4922 sensor schematic drawing to Alpha-Log data logger

PRTEA4922.1 sensor schematic drawing

Frequently Asked Questions

Q: Can the sensor be used indoors?
A: The sensor is designed for outdoor use; for indoor applications, ensure proper calibration and placement.

Documents / Resources

LSI LASTEM DMA131A Black Globe Temperature Sensor [pdf] User Manual DMA131A, DMA121A, DMA131.1, DMA131A Black Globe Temperature Sensor, DMA131A, Black Globe Temperature Sensor, Globe Temperature Sensor, Temperature Sensor, Sensor

References

• User Manual