RT-932 Mini Lux Meter

A. Product Overview

The R-Tek RT-932 Mini Lux Meter is a digital illuminance meter used for measuring the amount of visible light falling on a surface.

It provides a wide measurement range of 0 to 400,000 Lux or 0 to 40,000 foot candles, making it suitable for both lower and higher illumination environments. The instrument uses a silicon photodiode with a spectral response filter and follows the CIE photopic human eye response curve.

Key features of the RT-932 include:

• Measuring range from 0 to 400,000 Lux
• Measuring range from 0 to 40,000 foot candles
• Lux and foot candle measurement selection
• Maximum and Minimum recording
• Data Hold function
• Automatic measurement
• Analog bar graph indication
• Sampling rate of 2 measurements per second
• CIE photopic spectral response
• Silicon photodiode light sensor with spectral response filter
• Over range indication
• Backlit digital measurement capability
• Compact handheld design

The instrument measures approximately 169 by 62 by 33 mm and weighs approximately 250 g. The listed accessories include the light meter, battery, carrying pouch and user manual.

B. Working Principle of the RT-932 Lux Meter

A lux meter measures illuminance, which represents the amount of visible light reaching a surface. Lux is the standard unit used to express illuminance. One lux represents one lumen of luminous flux distributed across one square metre.

The RT-932 uses a silicon photodiode with a spectral response filter as its light detector.

During measurement:

1. Light from the surrounding environment reaches the photodiode sensor.
2. The photodiode responds to the incoming light.
3. The spectral filter helps shape the response so that it corresponds more closely to human visual sensitivity.
4. The instrument processes the sensor signal.
5. The measured illumination level is displayed in Lux or foot candles.

The RT-932 specifies a CIE photopic response, meaning its spectral response is designed around the standardized sensitivity of the human eye to visible wavelengths. This type of response is important when measuring illumination intended for people, workplaces and indoor environments.

C. Why is a Lux Meter Used?

A lux meter is used to determine whether a particular location has an appropriate level of illumination.

Lighting that is too low can make tasks difficult to perform, while excessive or poorly distributed lighting can also create uncomfortable working conditions. Illuminance measurement is therefore commonly used when evaluating workplace lighting and light distribution.

The R-Tek RT-932 Mini Lux Meter can be used for applications such as:

• Workplace illumination measurement
• Factory lighting inspection
• Office lighting measurement
• Laboratory illumination testing
• Warehouse lighting checks
• Commercial building lighting inspection
• Indoor lighting assessment
• Production area illumination testing
• Machine area lighting measurement
• Classroom lighting inspection
• Retail store lighting measurement
• Exhibition and display lighting checks
• Facility maintenance
• Electrical maintenance
• Lighting installation verification
• Comparative testing of different light sources
• General environmental light measurement

Lux meters are commonly used for workplace illumination, public buildings, production lines, exhibitions and museums.

D. Suitable Buyers

The R-Tek RT-932 Mini Lux Meter is suitable for professionals and organizations that need to measure, verify or compare illumination levels.

Suitable buyers include:

• Electrical engineers
• Electrical contractors
• Lighting consultants
• Facility managers
• Maintenance engineers
• Safety officers
• Environmental monitoring professionals
• Quality control departments
• Manufacturing plants
• Industrial maintenance teams
• Factories
• Laboratories
• Commercial building operators
• Offices
• Warehouses
• Educational institutions
• Hospitals and healthcare facilities
• Architects
• Interior lighting professionals
• HVAC and building service contractors
• Lighting installation companies
• Testing laboratories
• Occupational safety professionals

Frequently Asked Questions

1. What is the R-Tek RT-932 Mini Lux Meter?

The R-Tek RT-932 is a portable digital lux meter designed to measure light intensity or illuminance in Lux and foot candles. It is suitable for lighting inspection and environmental light measurement.

2. What is the measuring range of the RT-932 Lux Meter?

The RT-932 measures from 0 to 400,000 Lux and from 0 to 40,000 foot candles.

3. What does a lux meter measure?

A lux meter measures illuminance, which is the amount of visible light falling on a surface. Illuminance is normally expressed in Lux.

4. Can the RT-932 measure in both Lux and foot candles?

Yes. The RT-932 provides selectable measurement in Lux and foot candles.

5. What type of sensor does the RT-932 use?

The RT-932 uses a silicon photodiode with a spectral response filter.

6. What is CIE photopic response in a lux meter?

CIE photopic response refers to a standardized spectral sensitivity curve representing how the human eye responds to visible light under normal lighting conditions. The RT-932 specifies a CIE photopic spectral response.

7. Does the RT-932 have a Data Hold function?

Yes. The RT-932 includes a Data Hold function, which is useful for holding a measurement reading for viewing or recording.

8. Does the RT-932 record minimum and maximum light readings?

Yes. The instrument provides Maximum and Minimum recording.

9. What is the sampling rate of the RT-932?

The published sampling rate is 2 measurements per second.

10. Can the RT-932 be used for workplace lighting measurement?

Yes. Lux meters are commonly used for evaluating illumination in workplaces, production areas and public buildings. The RT-932 provides a wide measurement range suitable for general illumination testing.

11. Can the RT-932 be used in factories?

Yes. It can be used to measure illumination in factory floors, production areas, machine workspaces, warehouses and other industrial environments within the instrument's specified operating conditions.

12. Can the RT-932 be used for office lighting inspection?

Yes. A lux meter can help measure and compare illumination levels at office desks, workstations, meeting rooms and other indoor areas. Workplace illumination is one of the common applications of lux meters.

13. What are the operating conditions of the RT-932?

The manufacturer specifies an operating temperature of minus 20 to 60 degrees Celsius with relative humidity below 90 percent, under non-condensing conditions.

14. What accessories are supplied with the RT-932 Lux Meter?

The R-Tek webpage lists the light meter, battery, carrying pouch and user manual as accessories.

15. Is the RT-932 suitable as a portable light meter?

Yes. With dimensions of approximately 169 by 62 by 33 mm and a weight of approximately 250 g, the RT-932 is designed as a handheld portable instrument for field and indoor lighting measurements.