PCE Instruments PCE-EM 888 User manual

© PCE Instruments
PCE-EM 888 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: 10 August 2018
v1.0
English

© PCE Instruments
Contents
1Safety notes........................................................................................... 1
2Introduction ........................................................................................... 2
2.1 Delivery contents .............................................................................................................. 2
3Specifications........................................................................................ 2
4Device Description................................................................................4
5Power on/off .......................................................................................... 4
6Measuring Functions............................................................................ 4
6.1 Air flow measurement and temperature ............................................................................ 5
6.2 Volume flow measurement ............................................................................................... 5
6.3 Barometric pressure measurement (abs. pressure) .......................................................... 5
6.4 K-type thermocouple ........................................................................................................ 5
6.5 Light measurement .......................................................................................................... 5
6.6 Humidity and ambient temperature ................................................................................... 5
6.7 Dew point measurement .................................................................................................. 5
7Hold function......................................................................................... 6
8MAX/MIN data recording ......................................................................6
9Auto Power Off......................................................................................6
10 Battery level indicator .......................................................................... 6
11 Warranty................................................................................................. 7
12 Disposal ................................................................................................. 7

© PCE Instruments
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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.

© PCE Instruments
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2 Introduction
The PCE-EM 888 climate meter enables the user to measure the most important environmental
conditions. Due to its dimensions and its low weight, this environmental tester is like a portable
weather station and can be used in any place. You only need to press a single key to view all
weather information in numerical terms. This makes the PCE-EM 888 ideal for construction
workers, field staff, engineers / technicians, sailors, pilots, farmers and lots of other persons who
have to rely on the weather or whose work is substantially influenced by the weather.
2.1 Delivery contents
1 x PCE-EM 888 hygrometer
1 x Type K thermocouple sensor TF-500
1 x 9V battery
1 x User manual
3 Specifications
Wind speed
Measuring range
80 ... 5910 ft / min
0.4 ... 30 m / s
1.4 ... 108 km / h
0.9 ... 67 mph
0.8 ... 58.9 knots
Resolution
1 ft / min
0.1 m / s
0.1 km / h
0.1 mph
0.1 knot
Accuracy
< 20 m / s: ± 3% of range
> 20 m / s: ± 4% of range
Volumetric air flow
Measuring range
Max. 54000 CMM
Max. 908400 CFM
Resolution
0.0001 ... 1 CMM
0.001 ... 100 CFM
Relative humidity
Measuring range
10 ... 95% RH
Resolution
0.1% RH
Accuracy
< 70% RH ± 4% of range
> 70% RH ± (4% of range + 1.2% RH)
Air temperature
Measuring range
0 ... 50 ° C / 32 ... 122 ° F
Resolution
0.1 ° C / 0.1 ° F
Accuracy
± 1.2 ° C / ± 2.5 ° F
Light
Measuring range
0 ... 2000 lux
1800 ... 20000 lux
0 ... 204 ft-cd
170 ... 1860 ft-cd
Resolution
1 lux
10 lux
0.1 ft cd
1 ft cd
Accuracy
± 5% of range ± 8 digits

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Type K thermocouple sensor
Measuring range
-100 ... 1300 ° C / -148 ... 2372 ° F
Resolution
0.1 ° C / 0.1 ° F
Accuracy
± (1% of range + 1 ° C)
± (1% of range + 2 ° F)
Barometric pressure
Measuring range
10 ... 999.9 hPa
1000 ... 1100 hPa
7.5 ... 825 mmHg
0.29 ... 32.48 inHg
Resolution
0.1 hPa
1 hPa
0.1 mmHg
0.01 inHg
Accuracy
± 1.5 hPa
± 2 hPa
± 1.2 mmHg
0.05 inHg
General specifications
Display
8 mm (0.32") LCD
Measurement
functions
Air speed / velocity
Volumetric air flow
Relative humidity
Air temperature
Light
Atmospheric / barometric pressure
Thermocouple type K
Operating conditions
0 ... 50 ° C (32 ... 122 ° F) / Max. 80% RH
Power supply
1 x 9 V battery
Current consumption
Approx. 6.2 mA
Weight
Approx. 160 g / 0.36 lb
Dimensions
156 x 60 x 33 mm / 6.2 x 2.4 x 1.3"

© PCE Instruments
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4 Device Description
1 Power/ESC Button
2 Hold Button
3 MIN/MAX Button
4 Unit/Zero Button
5 Temp./Lux Button
(℃/℉/▲/Lux/Ft-cd)
6 Function/▼ Button
7 Wind Sensor
8 Connection
K-type thermocouple
9 Temp./Humidity
Sensor
10 Light Sensor
11 Display
12 Battery Compartment
13 Carrying Strap
5 Power on/off
Power on: Press "Power Button" once.
Power off: During power on, press "Power Button" once.
Note: If MAX/Min recording has been started (“REC” icon in the display), you will not be able to
turn off the instrument.
6 Measuring Functions
The meter has these 7 functions:
Display indication
Measuring function
An
Air flow and temperature
AirFL
Volume flow
bAr
Absolute air pressure
tP
K-type thermometer
LIgHt
Light
rH
Humidity/Temp.
dP
Dew point
In order to change the measuring function, press the function key until the right function is
displayed.
Note: If the measured value is held („HOLD“ icon in the display) or MAX/MIN recording has
been started (“REC” icon in the display), the measuring function cannot be switched.

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6.1 Air flow measurement and temperature
During the airflow measurement, you can also read out the current temperature in the display.
The temperature will be shown in the bottom left-hand part of the display.
Now press the Unit/Zero Button to switch the airflow units. In order to change the temperature,
press the Temp./Lux Button (℃/℉/▲/Lux/Ft-cd).
6.2 Volume flow measurement
For volume flow measurement, you can select the unit “CMM” for cubic meters or “CFM” for
cubic feet per minute. Press the "Unit/Zero Button" to switch the volume flow unit.
6.2.1 Set measuring area for volume flow
To set the measuring area for the volume flow, first select the desired unit. The press the
Temp./Lux Button (℃/℉/▲/Lux/Ft-cd). The display will show “m-2” for square metres and “f-2” for
square feet. Now set the area. The Unit/Zero Button is used to get to the next digit and the
Temp./Lux Button (℃/℉/▲/Lux/Ft-cd) and the Function/▼ Button are used to increase and
decrease the value respectively. To confirm the set value, push the MIN/MAX Button. The
measurement will start after a few minutes.
Note: It is not possible to enter round measuring areas.
6.3 Barometric pressure measurement (abs. pressure)
To change the unit for the air pressure measurement, press the Unit/Zero Button. You can select
HPA, inHP or mmHP.
6.4 K-type thermocouple
First plug a K-type thermocouple into the socket of the device. The temperature value will be
displayed immediately. To change the temperature unit, push the Temp./Lux Button
(℃/℉/▲/Lux/Ft-cd).
6.5 Light measurement
When you make a light measurement, the display will turn by 180 °. Turn the device by 180 ° as
well to make sure the light sensor lies bare and you can read out the measurement values. Press
the Temp./Lux Button (℃/℉/▲/Lux/Ft-cd) to select measuring unit "Lux" or "Ft-cd".
6.5.1 Zero point of the light sensor
When the environmental temperature or the battery capacity changes, the zero point of the light
sensor can drift. To get the most accurate measurement results, it is recommended to zero the
device regularly. To do so, cover the sensor so that it is no longer exposed to any light. Then
press the Unit/Zero Button to zero the device. Zeroing is only possible if the indicated value is
below 20 lux.
6.6 Humidity and ambient temperature
While measuring the current air humidity, you can also read out the current ambient temperature.
To change the temperature unit, press the Temp./Lux Button (℃/℉/▲/Lux/Ft-cd).
6.7 Dew point measurement
When making a dew point measurement, you can change the unit by pressing the Temp./Lux
Button (℃/℉/▲/Lux/Ft-cd).

© PCE Instruments
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7 Hold function
Whenever you press the Hold Button, the current reading will freeze and a "HOLD" symbol will
appear on the display. Press the Hold Button again to unfreeze the value and proceed with your
ongoing measurement.
8 MAX/MIN data recording
Recording can be started by pressing the MIN/MAX Button. “REC” will appear in the display. Only
the lowest and the highest value will be saved when using this function. All other values will be
dropped. Press the MIN/MAX Button to view the saved values. Press the Hold Button to start
recording again. To get back to normal measurement mode, press and hold the MAX/MIN Button
for three seconds.
9 Auto Power Off
In order to prolong the battery life, the instrument has an "Auto Power Off" function. The meter
will switch off automatically if no buttons are pressed for around 10 minutes. When data are
recorded or a value has been held, this function will be disabled.
10 Battery level indicator
When the LCD display shows the symbol, it is necessary to replace the 9 V block battery.
Measurement may still be made for several hours after the low battery indicator appears.
However, faulty measurements can occur then.
To change the battery, open the battery compartment cover on the rear side of the meter. To
loosen the screw, you will need a screwdriver. Remove the old battery and replace it by a new
one. Observe correct polarity and re-install the battery compartment cover.

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11 Warranty
You can read our warranty terms in our General Business Terms which you can find here:
https://www.pce-instruments.com/english/terms.
12 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 contact information
Germany France Spain
PCE Deutschland GmbH PCE Instruments France EURL PCE Ibérica S.L.
Im Langel 4 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 States of America United Kingdom Italy
PCE Americas Inc. PCE Instruments UK Ltd PCE Italia s.r.l.
711 Commerce Way suite 8 Units 12/13 Southpoint Business Park Via Pesciatina 878 / B-Interno 6
Jupiter / Palm Beach Ensign Way, Southampton 55010 LOC. GRAGNANO
33458 FL Hampshire CAPANNORI (LUCCA)
USA United Kingdom, SO31 4RF Italia
Tel: [phone] Tel: [phone] Telefono: [phone]
Fax: [phone] Fax: [phone] Fax: [phone]
[email protected] [email protected] [email protected]
www.pce-instruments.com/us www.pce-instruments.com/english www.pce-instruments.com/italiano
The Netherlands Chile Hong Kong
PCE Brookhuis B.V. PCE Instruments Chile S.A. PCE Instruments HK Ltd.
Institutenweg 15 RUT: 76.154.057-2 Unit J, 21/F., COS Centre
7521 PH Enschede Santos Dumont 738, local 4 56 Tsun Yip Street
Nederland Comuna de Recoleta, Santiago, Chile Kwun Tong
Telefoon: [phone] Tel. : [phone] Kowloon, Hong Kong
Fax: [phone] Fax: [phone] Tel: [phone]
[email protected] [email protected] [email protected]
www.pce-instruments.com/dutch www.pce-instruments.com/chile www.pce-instruments.cn
China Turkey
PCE (Beijing) Technology Co.,Ltd PCE Teknik Cihazları Ltd.Şti.
1519 Room, 6 Building Halkalı Merkez Mah.
Men Tou Gou Xin Cheng, Pehlivan Sok. No.6/C
Men Tou Gou District 34303 Küçükçekmece - İstanbul
102300 Beijing Türkiye
China Tel: [phone]
Tel: [phone] Faks: 0212 705 53 93
[email protected] [email protected].tr
www.pce-instruments.cn www.pce-instruments.com/turkish