Gossen MetraWatt MAVO-MONITOR, MAVO-SPOT Operating Instructions Manual

MAVO-MONITOR / MAVO-SPOT

Instrument Set for Contact or Distant Measurements of Luminances

15043
1/1.00

Operating Instructions

2 GOSSEN Foto- und Lichtmeßtechnik

1 Display
2 Slider switch cd/m² – segment test

3 ON/OFF switch
4 Rechargeable battery socket
5 Socket for recorder output
6 Hold key
7 Selector slider switch
8 Socket for connection to meas. sensor
9 Measuring sensor

10 Sensor aperture

Contents Page

1 Description of MAVO-MONITOR .............3

2 Applications .............................................. 3

3 Operating the MAVO-MONITOR ..............4

3.1 Inserting the Battery ........................................4

3.2 Preparing the Measur e m en t .......... ... ... ............4

3.3 Contact Measurements ...................................5

3.4 Overflow ..........................................................5

4 Functioning and Circuitry ....... ........... ......6

5 What is Luminance? ................................6

6 Technical Data ......................... .................7

7 Maintenance ..............................................8

7.1 Calibration Service ..........................................8

7.2 Cleaning and Maintenance .............. ................8

8 Description of MAVO-SPOT ......... ............9

9 Operating the MAVO-SPOT ...................10

9.1 Inserting the Battery ......................................10

9.2 Battery Control ... ... .............. ... .............. .. ... .....11

9.3 Preparing the Measur e m en t .......... ... ... .......... 11

9.4 Measuring ................ ................ ................. .....11

10 Technical Data ................... ........... ..........12

11 Maintenance ............................................13

11.1 Calibration Service ........................................13

11.2 Cleaning and Mai ntenance ............. ...............13

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1 Description of MAVO-MONITOR

The MAVO-MONITOR is an illumination level
meter designed for easy and precise measure-

ments in cd/m² on backlighted or luminous sur­faces. The instrument is colour-corrected, i.e. the
spectral response of the photo diode is adapted to
that of the human eye V (λ).

The correction filters are incorporated in the sen­sor. They can thus measure all salient kinds of
light without having to take correction factors into
account.

The recorder output of the MAVO-MONITOR
makes it particularly suitable for monitoring appli­cations, checking technical acceptance conditions
and wherever hardcopy results are required.

2 Applications

Contact Measurements

with the MAVO-MONITOR
placed directly on the surface to be measured.

Suitable for

• monitors

• television screens

• light boxes

• light displays

Measuring at a Distance

Using the MAVO-MONITOR plus
MA VO-SPOT attachment.
Suitable for measuring

• monitors taking the existing ambient light
into consideration

• lighting of streets and airfield areas

• lighting of sports areas

• ligh t contrasts at work stations

• lighting in museums

• uniform illumination of projection screens

4 GOSSEN Foto- und Lichtmeßtechnik

3 Operating the MAV O-MONIT O R

3.1 Inserting the Battery

The battery compartment is to be found at the
back of the unit.
To open the compartment turn the screw through

90° using a coin so that the lid pops open.
Insert the included battery into the battery com­partment.
Make sure you insert the batteries with the right
polarity. Close the battery compartment.

Attention

Only use new batteries or rechargeable accus
according to IEC 6 LF 22!

3.2 Preparing the Measurement

Connect the measuring sensor to the
MAVO-MONITOR. Switch the instrument on using
the ON/OFF switch and carry out a segment test.

Segment test

Move the slider switch to the position
“Segm.-Test”. The display is working properly
when the readout 1888 appears for 1.5 seconds
(followed by an undefined readout).
If not, the instrument must be returned to our
Service Department.

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3.3 Contact Measurements

Move the slider switch to “cd/m²”.
Place the sensor flat on the surface to be meas­ured. Select the desired measuring range using
the selector slider switch.

Notes

– Strong ambient light can influence the measure-

ment. This is particularly important when a glass
pane is sandwiched between the actual screen
surface and the sensor.

– Artificial light sources do not achieve full lumi-

nance until they have warmed up. It is therefore
advisable to switch on 15 min. earlier.

– The luminance of light sources depends on the

power supply i.e. check the voltage with a volt­meter where necessary.

3.4 Overflow

If the measuring range is exceeded
the display merely shows a 1 on
the left, the other digits will be
blank. Move to the next higher
range.

Display Hold

Pressing the display hold button will “freeze” the
readout at that time. Pressing this button again will
release the hold and normal measurements can
be resumed.