Gossen MetraWatt SECULIFE IM User manual

GMC-I Messtechnik GmbH
Operating Instructions
SECULIFE | IM 15161
Luminance Monitoring 1/7.04

GMC-I Messtechnik GmbH
Key pad
SECULIFE IM
2
Light measuring probe
Display
Light sensor
USB Port

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Page Page
1 Applications..............................................4
2 Display................................................... 5 5 USB Port –
2.1 The elements of the display..................... 5 Standard Software............ 12
2.2 Key pad................................................... 5
6Accessories................................ 13
3 SECULIFE IM Operation.................. 6 6.1 Standard equipment.....................13
3.1 Preparation............................................. 6 6.2 Optional accessories....................13
3.2 Duration of display - 6.3 Calibration Certificate...................13
Continuous operation.............................. 6
7 Servicing and Repairs................14
4 Functioning of the SECULIFE IM.... 7
4.1 Switching on –Making Measurement....... 7 8 Specifications..............................14
4.2 Selecting the desired measuring unit –
cd/m2or fL ......................................... 7 Declaration of conformity...........17
4.3 Overload signal........................................ 7
4.4 Memory functions..................................... 8
4.4.1 „HOLD“ Display Hold Function................. 8
4.4.2 „Mem“ - Storing measurement value
in memory........................................... 9
4.4.3 „Mem Edit“ - deleting a value in memory
and enter a new value....................... 10
4.4.4 „Mem Recall“ - Data Memory Recall....... 11
4.4.5 „Mem Clear“ - Clear memory.................. 12
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1 Applications
The SECULIFE IM Luminance Meter is a handy, easy to use and high precision measuring instrument.
It allows the accurate measurement of the luminance in cd/m² or fL. The SECULIFE IM is ideally suited
for contact measurements with the light measuring probe placed direct on luminous or backlighted
surfaces (monitors, TV sets,light boxes, light panels). When combined with the SECULIFE IA
Attachment (optional accessory), it can be used for spot metering the luminance at a distance from 34
cm to , the measuring angle being 1 degree. (Monitors, with the ambient light being taken into
consideration in the measurement - lighting and illumination of work stations, streets, airports,
museums, projection screens). The light sensor is color corrected, i.e. its spectral responsitivity has
been matched to the spectral photonic vision of the human eye (V ). The accuracy class for luminance
meters has been defined in the Standard Specification DIN 5032, Part 7. The SECULIFE IM fully
complies with the requirements of Class B.Consequently all the important types of light can be
measured with high precision, without the necessity to apply additional corrrection factors. The
SECULIFE IM is provided with a data memory with 100 measurement value locations, which can be
read and processed direct with the keys and display, but also through the integrated USB Port and the
standard software provided with the instrument.
cd/m² = Candela per m² 1 cd/m2= 0.2919 fL = 0.0929 cd/ft2
fL = footLambert 1 fL = 3.426 cd/m2= 0.3183 cd/ft2
1 cd/ft2= 10.76 cd/m2= 3.142 fL
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2 Display
2.1 Description of display 2.2 Key pad
1 Display of measured value and 1 Switching on/off
Memory indication 2 Range key –Memory/Measuring range
2 Measurement Unit 3 cd/m2fL- Select measurement unit
3 Display „HOLD„ indication 4 Hold - Function
4 Multiplying factor for measurement value 5 Range key –Memory/Measuring range
5 Auto ranging –automatic range selection 6 Mem –Memory key
6 Low Battery
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3 Functioning of the SECULIFE IM
3.1 Preparation
First remove the snap-on cover and open the battery compartment at the back of the meter. Insert the
battery included with the meter (1.5 V size AA, IEC LR6) in the battery compartment.
Care should be taken to place the battery correctly according
to the polarity indications “+“ and “-“ in the battery compartment.
When the battery warning symbol ( ) appears in the display,
the battery must be replaced.
The values in the measurement data memory and also the preset
individual values will be maintained, even when the battery is changed.
3.2 Duration of Display –Continuous operation
If for approx. 4 minutes none of the keys of the SECULIFE IM is pressed, the instrument will be
switched off automatically. During the last 4 seconds before automatic switch off an acoustic signal will
sound. By pressing any one of the keys, you can override the automatic switch off. When the
instrument is switched off, the values stored in the data memory and also the preset individual values
will be maintained. You can override the automatic switch off, when switching on the instrument and
simultaneously keep the HOLD key depressed.
The measuring unit (cd/m² or fL) in the display will blink and indicate that the continuous operation mode
is on.
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4 Using the SECULIFE IM
4.1 Switching on –Making Measurement
Press the on/off key and the SECULIFE IM is immediately in the measuring mode and is measuring at
the rate of 2 times per second. The instrument is in the function „AUTO“, i.e. the SECULIFE IM will
select the best suited measuring range for the existing light level. By pressing one of the range keys,
one of the measuring ranges can be locked. Browsing up or down through additional measuring ranges
is accomplished by briefly pressing one of the range keys. If both keys are pressed and held
simultaneously, the instrument is returned to „AUTO RANGING“.
4.2 Selecting the desired measurement unit cd/m2or fL
Use the key cd/m2fL to select the desired unit for the read-out –cd/m² or fL.
4.3 Overload Display
When exceeding one of the measuring ranges „OL“ (Overload) appears in the display.
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4.4 Memory Functions
The SECULIFE IM is provided in addition to the „Display Hold“ also with a memory for data up to 100
measurement values.
This function allows several measurement operations in the field and read-out at a later time. The data
stored in the memory will be maintained, even when the instrument is turned off or the battery is
changed.
4.4.1 „HOLD“ Display Hold Function
The display HOLD function allows you to measure even at very low light levels, where it would be
difficult to read the display. By pressing the HOLD key, the last value measured is held on the display to
be read at brighter light. Pressing the HOLD key again will return the SECULIFE IM to the measuring
function.
The function HOLD is the basic function for all the memory functions.
Hold
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4.4.2 „Mem“ – Storing measurement value in memory
The measurement value to be memorized is locked by the Hold
key in the display. By pressing the key Mem you will enter the
value to be stored in the next free memory location. An acoustic
signal confirms „value stored in memory“.
The display indicates the stored measurement value alternating
with the number of the memory location for a few seconds.
Subsequently, the SECULIFE IM will return to the measuring
function. When the memory is completely filled, the display will
show „FLL“.
Hold
Mem
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4.4.3 „Mem-Edit“ – Deleting a value in memory and entering a new value
The Mavolux offers the function „Mem Edit“ for correcting a
value stored in the memory. Measure again, press the Hold key
and the new value is locked. Then by pressing one of the range
keys, you can browse through the memory.
At the memory location to be
corrected press now the key
Mem. An acoustic signal confirms
„value stored in memory“. In the
display the measurement value
stored is indicated for a few
seconds alternating with the
number of the memory location.
Subsequently the
SECULIFE IM will return to
measuring function.
Hold
Mem
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