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Summary of Contents for Gossen MetraWatt MAVO-SPOT 2 USB
- Page 1 Operating Instructions MAVO-SPOT 2 USB 15365 Digital Luminance Meter with 1° Measuring Angle 3/04.19...
- Page 3 Thank you for buying the precise MAVO-SPOT 2 USB from GOSSEN. Your new luminance meter guarantees the reliable measurement of daylight and artificial sources of light including LED. The high precision luminance meter for distance measurement with an acceptance angle of 1° is assigned to class B in accordance with DIN 5032-7, appendix B of DIN EN 13032-1 and CIE 69.
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Page 4: Table Of Contents
Table of Contents Page Table of Contents Page Initial Startup Memory Function Inserting the Batteries 3.5.1 Saving Measured Values Self-Test 3.5.2 Editing Measured Values Battery Indicator 3.5.3 Saving Values with Corr. Factor Lens Accessories 3.5.4 Reading Out Measured Values Changing the Default Settings 3.5.5 Clearing Memory Modes: Standard and Compact 3.5.6 Saving Measured Values (in groups) 26... - Page 5 Safety Precautions Please read these safety precautions carefully before using your meter. This will help you to avoid damaging the product and prevent personal injury. This symbol identifies important warnings which should be read in any case before initial startup of your GOSSEN product. Warnings In the event of malfunctioning, switch the meter off immediately.
- Page 6 Do not dismantle the meter. Never touch any parts inside the housing. Injury may result. Do not repair the meter yourself. Repairs may only be conducted by appropriately trained personnel. If the meter’s housing is damaged due to dropping or other external influences, remove the batteries and contact your local dealer or GOSSEN Service for repair.
- Page 7 Other Notes • Reproduction of product documentation or duplication of any excerpts therefrom necessitates the express consent of GOSSEN Foto- und Lichtmesstechnik GmbH. This applies as well to duplication in any electronic format and translation into other languages. • GOSSEN Foto- und Lichtmesstechnik GmbH reserves the right to make changes of any type without providing advanced notice. •...
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Page 8: Initial Startup
Initial Startup Inserting the Batteries The battery compartment is located at the front of the grip. Push the battery compartment cover in the grip down. Remove the battery holder with the help of the tab. Replace the batteries assuring correct polarity (+ and -). Insert the battery holder into the instrument and close the battery compartment with its cover. -
Page 9: Lens Accessories
Lens Accessories When using optional lens accessories, means close-up lenses or probe for contact measurement, only a maximum of one accessory may be mounted in front of the lens. The optional accessories for the meter are adapted to its specified accuracy. The use of accessories from other manufacturers may lead to significant measurement deviations in the range of several percent. -
Page 10: Unit Of Measure, Cd/M² Or Fl
cd/m² - fL DIP switch – selection of a of a unit of measure: cd/m² or fL The desired unit of measure, namely candelas per square meter or foot-lamberts, can be selected with the cd/m² - fL DIP switch. Linear - Page DIP switch – selection of 1000 individual memory locations or subdivision into groups You can select either consecutive storage of 1000 measured values or subdivision into 10 groups with 100 measured values each with the Linear - Page DIP switch. -
Page 11: The Meter And Its Controls
The meter and its Controls Device Overview Lens with thread for contact measuring probe, close-up lens and/or stray-light baffle Focus ring Eyepiece with cup USB connector Control panel Battery compartment Tripod socket... -
Page 12: Display
Display 1 Memory location display 2 Measured value and memory display 3 Unit of measure 4 Symbol for correction factors 1 and 2 5 Difference symbol 6 Ratio symbol 7 Percentage deviation symbol 8 Calculated value, memory group 9 Plus or minus sign for calculated value 10 Low battery warning display 11 USB indicator 12 Measuring function... -
Page 13: Controls
Controls Measuring key Measuring key Funtion key Function / shift key (Lumi - Corr - Mem) (A/B - %A - A-B) Multifunction key (MFK) Operation Switching the Instrument On The MAVO-SPOT 2 can be switched on by pressing any key. The measuring instrument is activated and the display panel is illuminated. -
Page 14: Measurements
Measurements Press the key to select the Lumi function. Look through the eyepiece on the MAVO-SPOT 2, and sharply focus your measuring field with the focusing mechanism at the lens. Now align the measuring circle reflected into the viewfinder to the point to be measured. This point should be uniformly illuminated, and as large as possible relative to the measuring circle. -
Page 15: Reference Quantity Measurement
Reference Quantity Measurement You can compare two measured values with your MAVO-SPOT 2. Press the key in order to select the Lumi function to this end. • Acquire measured value A as described in section 3.2; measured value A is used as a reference value for the following functions. -
Page 16: Ratio A/B
3.3.1 Ratio A/B This function is used, for example, for contrast measurements and luminance distribution at workstations. • The larger of the two measured values is always used as a dividend; i.e. if measured value B is larger than measured value A, the ratio of the two measured values is calculated as B ÷... -
Page 17: Percentage Deviation %A
3.3.2 Percentage Deviation %A This function is used, for example, for testing monitor screen uniformity (percentage deviation of screen corners from the reference value at the middle of the screen). • Depending upon the respective results, the minus sign (-) must be observed. etc. -
Page 18: Difference A-B
3.3.3 Difference A-B You can read the difference between reference value A and the second measured value (B) directly from the display. This function is used, for example, for detecting deviations in manufacturing. • Depending upon the respective results, the minus sign (-) must be observed. etc. - Page 19 • You can switch back and forth between measured values A and B with the MFK. • The reflectivity of ceilings, walls and floors can be measured with the MAVO-SPOT 2 in combination with the reflectance standard (optional accessory). Estimations made with reflection or gloss panels are thus eliminated. •...
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Page 20: Setting Correction Factors
Setting Correction Factors As many as two different correction factors can be entered to the MAVO-SPOT 2. • As default values, Corr1 is set to a factor of 1.000 (no correction) and Corr2 to a factor of 3.142 (illuminance measurement with GOSSEN reflectance standard, optional accessory). Press the key to select the Corr function. - Page 21 • With the Corr2 function (factor of 3.142) and the GOSSEN reflectance standard (optional accessory), you can indirectly measure illuminance (lux or footcandles) with your MAVO-SPOT 2. • The unit of measure is switched to illuminance (lx or fc) at the display while measurement is being performed. •...
- Page 22 • Save Corr changes permanently Clear !!!! Memory first !! • Take readings with applied corr factors • Reset correction values to factory defaults by simultaneously pressing the keys.
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Page 23: Memory Function
Memory Function In addition to its display memory, the MAVO-SPOT 2 is also equipped with a measured value memory with 1000 memory locations. This function allows you to perform measurements on-site, and to read them out at a later point in time. Stored values are retained when the instrument is switched off, as well as when the batteries are replaced. -
Page 24: Editing Measured Values
3.5.2 Editing Measured Values (Mem-Edit) Stored measured values can be overwritten with the Mem function. • Select the memory location to be edited with the MFK. • Press the key in order to freeze the memory location. “Edit” and the selected memory location is shown in the display indicating that you are up to overwrite the current mem-cell •... -
Page 25: Saving Values With Corr. Factor
3.5.3 Saving Measured Values with Correction Factor If a correction factor has been programmed into the MAVO-SPOT 2 (see also page 17), a corresponding display appears automatically. You can now switch back and forth between Corr1 and Corr2 by pressing the key. -
Page 26: Saving Measured Values (In Groups)
3.5.6 Saving Measured Values (in groups) Measured values can also be saved to 10 groups of 100 measuring locations each. This function is accessed by setting the “Linear - Page” DIP switch in the battery compartment to “Page”. Press the key to select the Mem function. -
Page 27: Additional Applications
Additional Applications Contact Measurement The MAVO-SPOT 2 is designed for distance measurement. It can be placed directly onto a monitor screen or display surface with the optional probe for contact measurement which is delivered with an adapter disc. The pressure applied to flat screens or sensitive surfaces is significantly reduced thanks to the large surface area provided by the disc. -
Page 28: Illuminance Measurement
Illuminance Measurement The meter is designed for luminance measurement, but can also be used to measure illuminance in conjunction with the optional reflectance standard for illuminance measurement. The correction factor required for the conversion is stored in Corr2. The display automatically switches to lx or fc when it is selected. USB Port - Software The USB interface of the meter is located on the front of the housing. -
Page 29: Factory Calibration
Factory Calibration The MAVO-SPOT 2 USB with intuitive user interface is an accurate and reliable luminance meter. Like all other precision light meters, this product also requires regular maintenance and recalibration in order to continuously fulfil performance capabilities within the tolerances and specifications stipulated by the manufacturer. -
Page 30: Service Notes
Service Notes The instrument does not require any special maintenance if used in accordance with the operating instructions. If the instrument becomes contaminated during use, clean the surface of the housing with a slightly moistened cloth. If the optics or filter are contaminated, clean them with an optics cleaning cloth. Avoid the use of cleansers, abrasives or solvents. -
Page 31: Technical Data
Technical Data Sensor Technology, Measuring Uncertainty Type High precision luminance meter for distance measurement with mirror reflex optic and viewfinder display for measuring light-source and surface brightness Classification Class B per DIN 5032 part 7, DIN EN 13032-1 appendix B, CIE 69 Measuring angle 1°... - Page 32 M514G Most Important Error Limits DIN 5032-7 Class B Admissible Error according to Typical Error Characteristics DIN 5032-7 class B MAVO-SPOT 2 USB 3.0 % ‘ V() Adaptation - f 1.5 % Influence Environment Luminance - f 1.5 % Linearity - f ...
- Page 33 ‘ V () Adaptation - f 100% V(λ) Typ MAVO-SPOT 2 USB...
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Page 34: Declaration Of Conformity
90471 Nürnberg Produktbezeichnung/ Product name: Leuchtdichtemessgerät / Luminance Meter Typ / Type: MAVO-SPOT 2 USB Bestell-Nr / Order No: M508G Das bezeichnete Produkt stimmt mit den Vorschriften folgender Europäischer Richtlinien überein, nachgewiesen durch die vollständige Einhaltung folgender Normen: The above mentioned product has been manufactured according to the regulations of the following European directives proven through complete compliance with the following standards: Nr. - Page 36 Printed in Germany – Subject to change without notice GOSSEN Foto- und Lichtmesstechnik GmbH I Lina-Ammon-Str.22 I D-90471 Nuremberg I Germany Phone: +49 911 800621 0 I E-Mail: info@gossen-photo.de I www.gossen-photo.de...
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