Gossen MetraWatt MAVO-SPOT 2 Operating Instructions Manual
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Gossen MetraWatt MAVO-SPOT 2 Operating Instructions Manual

Digital luminance meter
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Operating Instructions
MAVO-SPOT 2
15365
Digital Luminance Meter with 1° Measuring Angle
2/05-13

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Summary of Contents for Gossen MetraWatt MAVO-SPOT 2

  • Page 1 Operating Instructions MAVO-SPOT 2 15365 Digital Luminance Meter with 1° Measuring Angle 2/05-13...

  • Page 2: Table Of Contents

    The Display Panel and its Elements 4.5.3 Saving Values with Correction Factor 21 The Keypad 4.5.4 Reading Out Measured Values 4.5.5 Clearing Memory Working with the MAVO-SPOT 2 4.5.6 Saving Measured Values (in groups) 22 Preparation Replacing the Batteries Additional Applications...

  • Page 3: Applications

    The MAVO-SPOT 2 is a high-precision measuring instrument with a measuring angle of 1°. Luminance measurements at distances of 1 meter to infinity can be performed with the instrument. The MAVO-SPOT 2 features mirror reflex optics with a 15° field of view, a sharply marked 1° measuring circle at the center and a focusing mechanism.
  • Page 4 Lens with protective filter or close-up lens and baffle Focus ring Eyepiece with cup USB - connector Control panel Battery compartment Tripod socket Photo of MAVO-SPOT 2 GOSSEN Foto- und Lichtmesstechnik GmbH...

  • Page 5: 2.1 The Display Panel And Its Elements

    The Display Panel 2.1 The Display Panel and its Elements 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...

  • Page 6: The Keypad

    Function / shift key (Lumi – Corr – Mem) (A/B – %A – A-B) Multifunction key (MFK) Working with the MAVO-SPOT 2 Preparation Inserting the Batteries The battery compartment is located at the front of the grip. Push the battery compartment cover in the grip down.

  • Page 7: Self-Test

    The display test can be aborted by pressing any key. Battery Indicator The MAVO-SPOT 2 requires two 1.5 V AA batteries (alkaline manganese). The capacity display indicates the current battery power level. Measured values are retained in memory when the batteries are changed.

  • Page 8: Changing Default Settings (Dip)

    Changing the Default Settings You can change the default settings for your MAVO-SPOT 2. The settings are selected with the help of the DIP switches inside the battery compartment underneath the battery holder. The default settings can be changed as desired in any combination.

  • Page 9: Memory Display: Individual Or Groups

    Display On-Time If none of the keys at the MAVO-SPOT 2 are activated for a period of 30 seconds, the instrument is switched off automatically, i.e. the display goes blank but measured values and individual settings are stored to memory.

  • Page 10: 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.

  • Page 11: 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 4.2; measured value A is used as a reference value for the following functions.

  • Page 12: Ratio A/B

    4.3.1 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 ÷ A. GOSSEN Foto- und Lichtmesstechnik GmbH...

  • Page 13: Percentage Deviation %A

    4.3.2 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 14: Difference A-B

    4.3.3 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 15 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 reflection standard (optional accessory). Estimations made with reflection or gloss panels are thus eliminated.

  • Page 16: 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 reflection standard, optional accessory).
  • Page 17  With the Corr2 function (factor of 3.142) and the GOSSEN reflection 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 18  Save Corr changes permanently Clear !!!! Memory first !!  Take readings with applied corr factors  Reset correction values to factory defaults by simultaneously pressing the keys. GOSSEN Foto- und Lichtmesstechnik GmbH...

  • Page 19: 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.

  • Page 20: Editing Measured Values

    4.5.2 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 21: Saving Values With Correction Factor

    4.5.3 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 22: Saving Measured Values (In Groups)

    4.5.6 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” (see page 9, Linear - Page DIP switch). Press the key to select the Mem function.

  • Page 23: Additional Applications

    Stationary Use MAVO-SPOT 2 USB with Your MAVO-SPOT 2 is equipped with a ¼" thread at the bottom for a tripod, attachment and adapter for and thus fits all commercially available tripod mounts. The protective cap must contact measurements be attached to the eyepiece as well.

  • Page 24: Accessories

    Accessories Included with the Instrument  Aluminum case  Batteries  Operating Instructions  Protective Filter  CD ROM  Protective lens cap, protective eyepiece cap Optional Accessories  Close-up lenses: Test points at distances ranging from 1 meter to infinity can be measured with the MAVO- SPOT 2 and the included protective filter.

  • Page 25: Calibration Certificate

    55° C and less than -20° C should be avoided.  When not in use, attach the lens cap to the front lens and store the MAVO-SPOT 2 in the included aluminum case.  Do not expose your measuring instrument to excessive temperatures, for example in closed motor vehicles exposed to the sun, or near radiators and the like.

  • Page 26: Technical Data

    Technical Data Type Luminance meter with SLR optic and viewfinder display for measuring light-source and surface brightness Measuring angle 1° Field of view 15° diagonal Classification Class B per DIN 5032, part 7, and DIN EN 13032, appendix B, CIE 69 Optical system 77 mm / f/1.8, flare factor f <...
  • Page 27 Measured value memory Up to 1000 individual values or 10 groups with 100 individual values each (switchable) Display Viewfinder with back-lit LCD, measured value display with 4-digit precision Controls Easy use with 4 keys and 1 slide switch, configuration with DIP switches in the battery compartment Power supply Two 1.5 V batteries (IEC LR6, AA type)
  • Page 28 Table 1: MAVO-SPOT 2 Characteristics and specifications Admissible deviation Characteristics MAVO-SPOT 2 USB (CIE 69, DIN 5032, EN 13032)* DIN 5032 class B  3,0 % V() match - f ´ 1,5 % Effect from the surrounding field - f ...
  • Page 29 Lina-Ammon-Str.22 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 30 GOSSEN Foto- und Lichtmesstechnik GmbH...
  • Page 31 GOSSEN Foto- und Lichtmesstechnik GmbH is also a leading manufacturer of other interesting light measuring instruments: MAVOLUX 5032 C USB: precision digital instrument for illuminance measurement, class C in accordance with DIN 5032, part 7, and CIE no. 69. Luxmeter for use in industry and the commercial trades, as well as by government authorities, for preliminary measurements.
  • Page 32 Printed in Germany - Subject to change without notice GOSSEN Foto- und Lichtmesstechnik GmbH I Lina-Ammon-Str.22 I D-90471 Nürnberg I Germany Phone: +49 911 8602-181 I Fax: +49 911 8602-142 I E-mail: info@gossen-photo.de www.gossen-photo.de GOSSEN Foto- und Lichtmesstechnik GmbH...

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