PCE LMD5 User guide

© PCE Instruments

PCE-LMD 5 / PCE-LMD 10 Lux Meter

User Manual

User manuals in various languages (français,

italiano, español, português, nederlands, türk, polski,

русский, 中文) can be found by using our

product search on: www.pce-instruments.com

Last change: 30 December 2021

v1.0

English

Contents

1 Safety notes ........................................................................................... 1

2 Delivery scope ....................................................................................... 1

3 Accessories ........................................................................................... 1

4 Technical data ....................................................................................... 2

4.1 Specifications ................................................................................................................... 2

4.2 Sensitivity ......................................................................................................................... 2

5 Device description ................................................................................ 3

5.1 Key description................................................................................................................. 3

5.2 Display ............................................................................................................................. 3

6 Operating instructions ......................................................................... 4

6.1 Sensor ............................................................................................................................. 4

6.2 Switch on/off the meter ..................................................................................................... 4

6.3 Select units ...................................................................................................................... 4

6.4 Measurement ................................................................................................................... 4

6.5 Max/Min mode.................................................................................................................. 5

6.6 Hold data.......................................................................................................................... 5

6.7 Hold a PEAK value ........................................................................................................... 5

6.8 Relative value .................................................................................................................. 6

6.9 Backlight .......................................................................................................................... 6

6.10 Recording mode (PCE-LMD 10 only) ............................................................................... 6

6.11 Auto Power Off ................................................................................................................. 6

6.12 Zero point calibration ........................................................................................................ 7

7 Maintenance and cleaning ................................................................... 7

7.1 Cleaning and storage ................................................................................................ ....... 7

7.2 Charging the battery ......................................................................................................... 7

8 Contact ................................................................................................. 7

9 Disposal ................................................................................................. 7

© PCE Instruments

© PCE Instruments

1

1 Safety notes

Please read this manual carefully and completely before you use the device for the first time. The
device may only be used by qualified personnel and repaired by PCE Instruments personnel.
Damage or injuries caused by non-observance of the manual are excluded from our liability and
not covered by our warranty.

• The device must only be used as described in this instruction manual. If used otherwise,
this can cause dangerous situations for the user and damage to the meter.

• The instrument may only be used if the environmental conditions (temperature, relative

humidity, …) are within the ranges stated in the technical specifications. Do not expose

the device to extreme temperatures, direct sunlight, extreme humidity or moisture.

• Do not expose the device to shocks or strong vibrations.

• The case should only be opened by qualified PCE Instruments personnel.

• Never use the instrument when your hands are wet.

• You must not make any technical changes to the device.

• The appliance should only be cleaned with a damp cloth. Use only pH-neutral cleaner,

no abrasives or solvents.

• The device must only be used with accessories from PCE Instruments or equivalent.

• Before each use, inspect the case for visible damage. If any damage is visible, do not

use the device.

• Do not use the instrument in explosive atmospheres.

• The measurement range as stated in the specifications must not be exceeded under

any circumstances.

• Non-observance of the safety notes can cause damage to the device and injuries to
the user.

We do not assume liability for printing errors or any other mistakes in this manual.
We expressly point to our general guarantee terms which can be found in our general terms of

business.
If you have any questions please contact PCE Instruments. The contact details can be found at

the end of this manual.

2 Delivery scope

1 x lux meter PCE-LMD 5 or PCE-LMD 10 incl. lux sensor
1 x USB cable
1 x PC software (PCE-LMD 10)
1 x service bag
1 x user manual

3 Accessories

USB mains adaptoNET-USB

© PCE Instruments

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4 Technical data

4.1 Specifications

Measurement range

0 ... 400 kLux
0 ... 40 kfc

Accuracy

±5 % of measured value ±10 digits at standard light A
±10 % of measured value ±10 digits

Repeatability

±2 %

Sampling rate

4 Hz

Sensor

Silicon photodiode with spectral filter

Peak Hold

Detection of the peak light intensity of the shortest 10 µS

Battery level indicator

flashes when the battery voltage is too low

Data logger (PCE-LMD 10)

32,000 sets of measured values

Power supply

3.7 V Li-Ion battery

Operating conditions

-10 ... 50 °C / <80 % RH

Storage conditions

-20 ... 50 °C / <80 % RH

Dimensions

Meter: 162 x 88 x 32 mm (6.38 x 3.46 x 1.26 ")
Sensor: 102 x 60 x 25 mm (4.01 x 2.36 x 0.98")

Weight

approx. 320 g (0.70 lbs)

4.2 Sensitivity

© PCE Instruments

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5 Device description

5.1 Key description

1. Sensor cable

2. LCD

3. Zero calibration key

4. HOLD key

5. ON/OFF key

6. Key for switching the unit

7. REL key (relative value)

8. PEAK key

9. MIN key (PCE-LMD 5) / MIN/MAX
key (PCE-LMD 10)

10. MAX key (PCE-LMD 5) / REC key (PCE
LMD 10 only)

11. Light sensor
Notice:

The micro USB socket is located at the
bottom of the meter.

5.2 Display

1. MAX/MIN value

2. Relative value

3. PEAK value MAX/MIN

4. Freeze data

5. Analogue bar graph

6. Digital display

7. Icon for data storage

8. Unit: FC/LUX

9. Battery icon

10. Icon for full memory

11. USB icon

12. Automatic power off

© PCE Instruments

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6 Operating instructions

6.1 Sensor

The light sensor is firmly connected to the meter by a spiral cable. Open the sensor protection
cap, leaving the white sensor dome fully exposed. To avoid scratches and damage to the sensor
dome, replace the protective cap when the meter is not in use.

6.2 Switch on/off the meter

Press and release the key to turn on the light meter and press and hold the same key for 3
seconds to turn off the light meter.

6.3 Select units

Press the key to select LUX or FC (Foot Candle) as the unit for measurements.

6.4 Measurement

Open the sensor protection cap.
Position the sensor at a point perpendicular to the light source.
Read the value on the LCD.

Note:
During the measurement, make sure that no shadow or reflective light enters the light sensor
dome.

© PCE Instruments

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6.5 Max/Min mode

1. Press the MAX (PCE-LMD 5) or MAX/MIN (PCE-LMD 10) key once. The "MAX" icon
will appear on the LCD and the maximum value will be displayed on the LCD until a
higher value is measured.

2. Press the MIN (PCE-LMD 5) or MAX/MIN (PCE-LMD 10) key again. The "MIN" icon will
appear on the LCD and the minimum value will be displayed on the LCD until a lower
value is measured.

3. Press the MAX/MIN key again. The MAX MIN icon will flash on the LCD and the real­time value will be displayed. Now the MAX and MIN values are recorded.

4. Press the MAX/MIN key again. This will take you back to step 1.

5. To exit the MAX-MIN mode, press and hold the MAX/MIN key for approximately 2
seconds until the "MAXMIN" icon disappears from the LCD.

6.6 Hold data

Press the "HOLD" key. The digital reading is held and the "HOLD" icon appears on the LCD.
Press the "HOLD" key again to return to normal operation.

Note:
When the Data Hold function is activated, the analogue bar graph above the measured value
changes according to the current light intensity.

6.7 Hold a PEAK value

The peak hold function allows the lux meter to detect the light pulse rising or falling to 10 µs.

1. Press the PEAK key. The "Pmax" icon will appear on the LCD. The lux meter measures
the MAX light pulse and displays the MAX value. The data will be updated until a higher
value is detected.

2. Press the PEAK key again. The "Pmin" icon will appear on the LCD. The lux meter will
display the MIN light pulse value. The data will be updated until a lower value is
detected.

3. To exit the Peak Hold function, press the PEAK key for approximately 2 seconds until
the "Pmax" or "Pmin" icon disappears from the LCD.

© PCE Instruments

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6.8 Relative value

The relative value is the difference in value between the current light value and the saved
reference light value.
To save a reading as a reference light value, press the REL key when the desired reference value
is displayed on the LCD. The value displayed thereafter will be the relative value of that saved
value.
For example: with the saved reference value 80 lux, if the current light value is 100 lux, the meter
will display 20 lux. To retrieve the reference value, press the REL key again. The value will be
displayed and the REL icon will flash on the LCD.
To exit REL mode, press and hold the REL key for approximately 2 seconds until the REL icon
on the LCD disappears.

6.9 Backlight

If no key is pressed for 60 seconds in APO (auto power off) mode or recording mode, the backlight
will automatically dim to save battery power. Press any key to increase the brightness again. In
non-APO mode, the backlight is always very bright.

6.10 Recording mode (PCE-LMD 10 only)

The lux meter has a data logging function. Before starting the recording function, connect the light
meter to the PC via Micro-USB and set up the parameters via the Smart Logger software. Set the
start mode to "by key" and disconnect the light meter from the PC after setup. Press the REC key
on the lux meter to start recording. The REC icon will start flashing and will be displayed on the
LCD.
Do not turn off the meter during recording mode. When the set number of data is reached, the lux
meter will be turned off automatically. When the memory is full, the FULL icon appears at the
bottom of the LCD. When enough data have been deleted, the FULL icon disappears.

Notice:
If the lux meter is turned off during recording, connect it to the PC and set up the parameters
again after turning it on before starting recording again. Otherwise, the ERR icon will be displayed
on the LCD when you press the REC key for recording.

6.11 Auto Power Off

The APO function is set to ON by default. To turn off the APO function, press the key lightly.
To extend the battery life, the lux meter will automatically turn off after about 10 minutes when not
in use.
In record mode or when the meter is connected via USB, the APO function is automatically
disabled until the memory is full or the set number of records is reached.

6.12 Zero point calibration

If value drift occurs after prolonged use of the light meter, it can be calibrated with the zero
calibration function.
Cover the sensor dome with the sensor protection cap.
Press the zero key. The "CAL" icon will appear on the LCD.
Press the Zero key until the "CAL" icon disappears from the LCD, then release the key when 0.0
lux is displayed.

Note:
If the light sensor is not covered, "ERR" is displayed when the zero key is pressed.

7 Maintenance and cleaning

7.1 Cleaning and storage

1. The white plastic sensor dome should be cleaned with a damp, soft cloth if necessary.

2. Store the light meter in an area with moderate temperature and relative humidity.

7.2 Charging the battery

When the battery power is insufficient, the battery icon appears on the LCD and flashes. Use the
DC 5V power adaptor to connect to the micro USB charging port on the bottom of the meter. The
battery icon on the LCD will indicate that the battery is charging and will disappear when the
battery is fully charged.

8 Contact

If you have any questions, suggestions or technical problems, please do not hesitate to contact

us. You will find the relevant contact information at the end of this user manual.

9 Disposal

For the disposal of batteries in the EU, the 2006/66/EC directive of the European Parliament
applies. Due to the contained pollutants, batteries must not be disposed of as household waste.
They must be given to collection points designed for that purpose.

In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use
them or give them to a recycling company which disposes of the devices in line with law.

For countries outside the EU, batteries and devices should be disposed of in accordance with
your local waste regulations.

If you have any questions, please contact PCE Instruments.

© PCE Instruments

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© PCE Instruments

8

PCE Instruments contact information

Germany France Spain

PCE Deutschland GmbH PCE Instruments France EURL PCE Ibérica S.L.
Im Langel 26 23, rue de Strasbourg Calle Mayor, 53
D-59872 Meschede 67250 Soultz-Sous-Forets 02500 Tobarra (Albacete)
Deutschland France España
Tel.: [phone] Téléphone: [phone] Tel. : [phone]
Fax: [phone] Numéro de fax: [phone] Fax: [phone]
[email protected] [email protected] [email protected]
www.pce-instruments.com/deutsch www.pce-instruments.com/french www.pce-instruments.com/espanol

United Kingdom Italy Turkey

PCE Instruments UK Ltd PCE Italia s.r.l. PCE Teknik Cihazları Ltd.Şti.
Unit 11 Southpoint Business Park Via Pesciatina 878 / B-Interno 6 Halkalı Merkez Mah.
Ensign Way, Southampton 55010 Loc. Gragnano Pehlivan Sok. No.6/C
Hampshire Capannori (Lucca) 34303 Küçükçekmece - İstanbul
United Kingdom, SO31 4RF Italia Türkiye
Tel: [phone] Telefono: [phone] Tel: [phone]
Fax: [phone] Fax: [phone] Faks: 0212 705 53 93
[email protected] [email protected] [email protected]
www.pce-instruments.com/english www.pce-instruments.com/italiano www.pce-instruments.com/turkish

The Netherlands United States of America

PCE Brookhuis B.V. PCE Americas Inc.
Institutenweg 15 1201 Jupiter Park Drive, Suite 8
7521 PH Enschede Jupiter / Palm Beach
Nederland 33458 FL
Telefoon: [phone] USA
[email protected] Tel: [phone]
www.pce-instruments.com/dutch Fax: [phone]
[email protected]
www.pce-instruments.com/us