Gossen MetraWatt SECULIFE IT Manual de usuario

Operating Instructions

SECULIFE | IT and ITC 15507

Illuminance Tester 2/2.14

2 GMC-I Messtechnik GmbH

Perspective view of SECULIFE IT

Photometer head

Circular orifice

Light collector

USB Port

Display

Key pad

Back of display unit:

- battery door

- serial number

- calibration seal for DAkkS- or

calibration certificate (if available)

Back of photometer head:

- serial number of display unit

- tripod socket ¼ “

GMC-I Messtechnik GmbH 3

Contents

Page Page

1 Applications.............................................4 5 USB Port –Standard Software……..12

2 Display..................................................... 5 6 Accessories..................................... 13

2.1 Description of Display Elements.............. 5 6.1 Standard Equipment......................... 13

2.2 Key Pad................................................... 5 6.2 Optional Accessories........................ 13

6.3 Calibration Certificate........................ 14

3 Functioning of the SECULIFE.............. 6 6.4 DAkkS Certificate………………… 14

3.1 Preparation............................................. 6

3.2 Duration of Display – 7 Service and Maintenance….……. 14

Continuous Operation.............................. 6

4 SECULIFE IT Operation.......................... 7 8 Specifications................................. 14

4.1 Switch On – Make Measurement...... 7

4.2 Selecting the Measuring Unit –

lx or fc – cd/m2 or fL........................... 7 Declaration of Conformity............ 18

4.3 Overload Display – Zero Point Indication 7

4.4 Memory Functions.................................... 8

4.4.1 „HOLD“ Display Hold Function................. 8

4.4.2 „Mem“ – Save Measured Values

in Memory........................................... 9

4.4.3 „Mem Edit“ – Overwrite a Saved

Measured Value.................................10

4.4.4 „Mem Recall“ - Data Memory Recall….... 11

4.4.5 „Mem Clear“ - Clear Memory...................12

4 GMC-I Messtechnik GmbH

1 Applications

The SECULIFE IT illuminance meters are handy, easy to use and high precision measuring instruments.

They allow the accurate measurement of the illuminance in the unit lx or fc.

Combined with the Luminance Attachment, available as optional accessory, the SECULIFE IT can also be

used for measuring luminance in the unit cd/m² or fL.

The light sensor is color corrected, i.e. its relative spectral responsivity has been adapted to that of the

human eye V(



). All the important types of light can be measured with high precision, without the necessity

to apply any additional correction factors.

The accuracy of that V(



) adaptation is the main difference between the two types SECULIFE ITC

(M688E) and SECULIFE IT (M688A). The quality classes for illuminance meters have been defined in the

Standard Specifications DIN 5032, Part 7. Consequently, the SECULIFE ITC complies with Class C,

SECULIFE IT complies with Class B (DIN 5032, part 7 and 8).

The light collector with circular orifice in the photometer head has integrated cosine correction, so that

oblique incident light will be measured accurately.

Both SECULIFE IT/ITC types allow measuring very high intensity light (daylight, headlights) without

additional accessories. Especially the SECULIFE IT having an initial sensitivity of 0.01 lx is ideally suited

for measuring extremely low light intensities, such as emergency lighting.

The instruments are provided with a measuring value memory with 100 data spaces, which can be read

and processed directly by the keys and the display but also through the integrated USB Port and the

Standard Software supplied with the meters.

lx = Lux 1 lx = 0.0929 fc

fc = footcandle 1 fc = 10,76 lx

cd/m² = Candela per square meter 1 cd/m2 = 0,2919 fL

fL = footlambert 1 fL = 3,426 cd/m2

GMC-I Messtechnik GmbH 5

2 Display

2.1 Description of Display Elements 2.2 Key Pad

1 Display of measuring value and Memory 1 Switch On/Off

2 Measuring Unit 2 Range key – Memory/Measuring range

3 Display „HOLD„ indication / Buffer Storage 3 lx/fc – Select measuring unit

4 Multiplying factor for measuring value 4 HOLD – Function / Buffer Storage

5 Auto ranging – automatic range selection 5 Range key – Memory/Measuring range

6 Low Battery 6 MEM – Memory key

* SECULIFE IT 5032 B USB with automatic

backlight in HOLD function

Hintergrundbeleuchtung.in der „Hold“-Funktion.

6 GMC-I Messtechnik GmbH

3 Functioning of the SECULIFE IT

3.1 Preparation

First remove the snap-on cover of the battery compartment at the back of the meter. Insert the battery

included in the delivery contents (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 measuring 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 IT is pressed down, the instrument will be

turned off automatically. When the instrument is switched off, the values stored in the measuring data

memory and also the preset individual values will be maintained.

You can override the automatic switch-off, when you switch on the instrument and simultaneously keep

the HOLD key pressed down. The measuring unit „lx / fc“ in the display will blink and indicate that the

Continuous Operation Mode is on.

GMC-I Messtechnik GmbH 7

4 SECULIFE IT Operation

4.1 Switch On –Make Measurement

Press down the on/off key and the SECULIFE IT will start up in measuring mode and will immediately be

measuring at 2 times per second. The instrument is in the function „AUTO“, i.e. the SECULIFE IT 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 set. Scrolling 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 Measurement Unit lx or fc –cd/m² or fL

Use the key lx/fc to select the required unit for the read-out – lux or footcandle. With the additional

Luminance Attachment (please refer to 6.2 – Optional accessories), this key also selects the measurement

unit for luminance cd/m² or fL – candela per square meter or footlambert.

4.3 Overload Display –Zero Point Indication

When exceeding one of the measuring ranges „OL“ (Overload)

appears in the display.

The zero point indication may be achieved by putting the protective

cap over the light collector of the photometer head.

8 GMC-I Messtechnik GmbH

4.4 Memory Functions

In addition to the display buffer storage, the SECULIFE IT has also been provided with a memory space

for up to 100 measured values.

This function allows the user to make several measurements in the field and then to view them later. The

data stored in the memory will be maintained, even if the meter is turned off or if the battery is changed.

4.4.1 „HOLD“ - Display Hold Function

The SECULIFE IT has been equipped with a Display HOLD Function in order to enable you to make

measurements in very low light conditions and to read them out later in brighter light conditions.

The latest measurement will be buffer-stored in the display by striking the HOLD key. Then “HOLD” will

appear in the display. Pressing down the HOLD key again will prompt the SECULIFE IT to return to the

measuring function.

The function HOLD is the basic function for all the memory functions.

Hold

GMC-I Messtechnik GmbH 9

4.4.2 „Mem“ – Save Measured Values in Memory

The measurement measured value which is to be saved will be

maintained by the Hold key in the display and may be filed onto

the next free memory space by pressing down key Mem. Then,

for a few seconds, the display shows the saved measured value

alternating with the number of the memory space.

After that, the SECULIFE IT returns into the measuring mode. If

the memory space is filled with all 100 memory spaces, then the

display will show “FLL”.

Hold

Mem

10 GMC-I Messtechnik GmbH

4.4.3 „Mem-Edit“ – Overwrite a Saved Measured Value

The SECULIFE IT offers the function „Mem Edit“ for correcting a

stored value in the memory. Measure again, press the Hold key

and the new value is logged in. Then, by pressing one of the

range keys, you can scroll through the memory.

At the memory space to be

corrected press down the key Mem.

Then the display shows the saved

value for a few seconds alternating

with the number of the memory

space. Subsequently the

SECULIFE IT will return to

measuring mode.

Hold

Mem

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