PCE Instruments PCE-EM 890 User manual

© PCE Instruments
PCE-EM 890 Environmental Tester
User Manual
User manuals in various languages (français,
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Last change: 12 January 2021
v1.0
English

© PCE Instruments
Contents
1Safety notes........................................................................................... 1
2Specifications........................................................................................2
3Delivery scope.......................................................................................3
4System description............................................................................... 4
5Measurement functions........................................................................ 5
6Operation ............................................................................................... 5
6.1 Preparation ...................................................................................................................... 5
6.2 Functions ......................................................................................................................... 5
6.3 Measurement................................................................................................................... 7
7Contact............................................................................................... 10
8Disposal ...............................................................................................10

© PCE Instruments
1
1 Safety notes
Please read this manual carefully and completely before you usethe 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 inthis instructionmanual. 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 Specifications
Measuring function
Measurement
range
Resolution
Accuracy
Wind speed
80 ... 3937 ft/min
1 ft/min
±3 % of range
0.4 ... 20 m/s
0.1 m/s
1.4 ... 72 km/h
0.1 km/h
0.9 ... 44.7 mph
0.1 mph
0.8 ... 38.8 knots
0.1 knots
Air temperature
0 ... 50 °C
0.1 °C
±1.2 °C
Humidity
10 ... 95 % RH
0.1 % RH
<70 % RH: ±4 % RH
>70 % RH:
±4 % of rdg. + 1.2 % RH
Barometric air pressure
10 ... 999.9 hPa
0.1 hPa
±1.5 hPa
1000 ... 1100 hPa
1 hPa
±2 hPa
UV radiation
0 ....1999 µW/m²
0.1 µW/m²
±(4% of range + 2 digits)
290 ... 390 nm
2 ... 20 mW/m²
0.01 mW/m²
External temperature
(Pt1000 input)
-10 ... 70 °C
0.1 °C
±1.2 °C
Volume flow
0.024 ... 3600 cmm
0.001 cmm
0.01 cmm
0.1 cmm
1 cmm
Dew point
-25.3 ... 49 °C
0.1 °C
Wet bulb
temperature
-5.4 ... 49 °C
0.1 °C
Heat stress index
0 ... 100 °C
0.1 °C
±2 °C
Wind chill
-9.4 ... 44.2 °C
0.1 °C
±2 °C
Altitude above sea level
-2000 ... 9000 m
1 m
±15 m

© PCE Instruments
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General technical data of the climate/weather measuring device
Display
LC display 8 mm digit height
Measurement functions
Wind speed / temperature
Air humidity / temperature
UV
Air pressure
Volume flow
Dew point
Wet bulb temperature
Wind chill
Heat stress index
Altitude above sea level
External temperature via Pt1000
Power supply
CR 2032 3 V battery
Power consumption
approx. 5 mA
Operating conditions
0 ... 50 °C / max. 80 % RH
Dimensions
120 x 45 x 20 mm
Weight
approx. 160 g
3 Delivery scope
1 x environmental tester PCE-EM 890
1 x CR2032 battery
1 x protective bag
1 x user manual

© PCE Instruments
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4 System description
①
Vane
⑦
REC key (recording)
②
LC display
⑧
Hand strap
③
Hold key (freeze display)
⑨
Pt1000 connection for external sensor
④
UV light sensor
⑩
Brief description of key function
⑤
Temperature / humidity sensor
⑪
Pressure sensor barometer
⑥
Power key (On)
⑫
Battery compartment

© PCE Instruments
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5 Measurement functions
Measuring function
Display text
Unit of measurement
Wind / air speed
AN
m/s, km/h, mph, Knot, FPM
Temperature
°C, °F
Volume flow
AirFL
CMM, CFM
Wind chill
CHiLL
°C, °F
Humidity
rH
% r. F.
Temperature
°C, °F
Dew point
dP
°C, °F
Wet bulb temperature
_Et
°C, °F
Heat index
HEAt
°C, °F
UV radiation (UVA)
U A
mW/cm², µW/cm², automatic
Air pressure
bAr
hPa (HPA), mmHg (mH9), inHg (inH9)
Altitude above sea level
HigH
m, Ft
External temperature via Pt1000
Pt
°C, °F
The units of measurement in brackets are the display representations that differ from the unit of
measurement.
6 Operation
6.1 Preparation
Open the battery compartment on the back of the device by turning it slightly to the left and insert
the CR 2032 3 V battery, observing correct polarity. Close the battery compartment.
6.2 Functions
6.2.1 Switch meter on / off
•Press the "Power" key to switch on the meter.
•To switch off the meter, press and hold the "Power" key until it switches off.
6.2.2 Display backlight
•Press and release the "Power" key when the meter is switched on.
•The display backlight switches on for 5 seconds.
6.2.3 Select measuring function
•Press and hold the "Hold" key when the meter is switched on.
•The display shows the measuring functions one after the other.
•Release the key as soon as the desired measuring function is displayed.

© PCE Instruments
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6.2.4 Select unit of measurement
•When the meter is switched on, press and hold the "REC" key until the display shows
"Unit".
•Press the "Power" key repeatedly until the desired unit of measurement appears onthe
display.
•Confirm the selection with the "REC" key.
•If you have selected a measurement function with dual measurement, you can now
change the unit of measurement for the second measurement function as described
above.
6.2.5 Hold function
•Press and release the "Hold" key to freeze the current reading on the display.
•Press and release the "Hold" key again to return to normal measuring mode.
•The hold function is not available when the memory function is activated.
6.2.6 Rec. function
•Briefly press the "REC" key to save the maximum and minimum readings of the current
measurement.
•To call up the max value, press and release the "REC" key.
•To call up the min value, press and release the "REC" key again.
•To exit the Rec function and delete the saved values, press and hold the "REC" key for
more than 2 seconds.
6.2.7 Automatic power off
The tester powers off after approx. 10 minutes of inactivity to save battery power.
Automatic power off is not active in "REC" mode.

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6.3 Measurement
6.3.1 Wind / air speed
•Switch on the tester and select the wind / air speed measurement function as described
above.
•Select the desired units of measurement as described above.
•Hold the meter in such a way that the vane is placed in wind direction.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.
6.3.2 Volume flow
•Switch on the meter and select the volume flow measurement function as described
above.
•Select the desired unit of measurement as described above.
•Press the "Hold" key to set the opening cross-section.
•When the hold indicator is displayed, press and hold the "REC" key until "m-2" or "F-2"
appears at the bottom of the display.
•Use the "Hold" and "Power" keys to increase or decrease the cross-section value.
•Press the "REC" key to confirm the entry.
•Hold the meter in such a way that the vane is placed in front of the discharge opening
and read the value. To obtain a more accurate measurement result, measure at several
points of the discharge opening and calculate the average of the measured values.
6.3.3 Wind chill
•Switch on the tester and select the wind chill measurement function as described
above.
•Select the desired unit of measurement as described above.
•Hold the meter in such a way that the vane is placed in wind direction.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.
6.3.4 Air humidity / temperature
•Switch on the tester and select the humidity / temperature measuring function as
described above.
•Select the desired units of measurement as described above.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.
6.3.5 Dew point
•Switch on the meter and select the dew point measurement function as described
above.
•Select the desired unit of measurement as described above.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.

© PCE Instruments
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6.3.6 Wet bulb temperature
•Power on the meter and select the wet bulb temperature measurement function as
described above.
•Select the desired unit of measurement as described above.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.
6.3.7 Heat index
•Power on the meter and select the heat index measurement function as described
above.
•Select the desired unit of measurement as described above.
•Do not cover or enclose the openings of the temperature / humidity sensor. This will
lead to incorrect measurement results.
6.3.8 UV radiation
•Power on the meter and select the UV radiation measurement function as described
above.
•Do not cover or enclose the openings of the UV light sensor. This will lead to incorrect
measurement results.
•The changeover from µW/cm² to mW/cm² is automatic.
6.3.9 Air pressure
•Power on the meter and select the air pressure measuring function as described above.
•Select the desired unit of measurement as described above.
•Do not cover or enclose the opening of the pressure sensor on the back of the unit.
This will lead to incorrect measurement results.
Attention!
The actual air pressure depends on the weather-related atmospheric air pressure and the altitude
above sea level. The unit is set to sea level when delivered. To adjust the altitude above sea level
to your location, proceed as follows:
•With the air pressure measuring function selected, press the "Hold" key.
•When the hold indicator is displayed, press and hold the "REC" key until "m" or "F"
appears at the bottom of the display.
•With the "Hold" and "Power" keys, you can increase or decrease the site altitude above
sea level.
•Press the "REC" key to confirm the entry.