Kurth Electronic KE8000 User manual

KE8000
Optical power meter
Version 1.3
© KURTH ELECTRONIC GmbH
All rights reserved, including translations.
All reprints and electronic copies, including excerpts, require prior written approval
of Kurth Electronic GmbH.
All of the brand names and trademarks cited herein are the property of their registered owners.
Operating Manual
Kurth Electronic GmbH | Muehleweg 11 | D 72800 Eningen u.A. GERMANY |
Tel. [phone] | Fax [phone] |
[email protected] | www.kurthelectronic.de

© Kurth Electronic GmbH, All Rights Reserved
2
KE8000
www.kurthelectronic.de
Optical Power Meter
dBm
nm
ON
OFF REF
dbm
Warning
The laser could injure your eyes, never look directly at the laser out-
put or the connected optical bre. Do not install bres while the light
source is active and make sure that your eyes are protected at all
times.
Preparation
Insert two AA alkaline batteries into the battery compartment on the back of
the device. To do this, remove the drop protection.
Dust cover
Level meter detector port:
SC/PC, FC/PC, ST/PC interchangeable
and 2.5 mm universal ferrule
Hole for carrying strap
Removable drop protection
Battery indicator
Wavelength display
Power /Attenuation display
Auto-o󰀨 display
Service port (without function)
ON / OFF key (Switch on / o󰀨)
Reference level setting
Wavelength selection key
Absolute power level in dBm or μW
Backlight
Back side:
Battery compartment – before changing
the battery (2 x AA Alkaline), remove the
rubber drop protection

© Kurth Electronic GmbH, All Rights Reserved 3
Usage
The optical level meter KE8000 is part of the new generation of high-perfor-
mance measuring devices for optical network testing and o󰀨ers fast testing
of bre performance and attenuation. It features the latest photodiode tech-
nology and is suitable for power measurement in optical network operation,
maintenance, installation, research and development.
The KE8000 is used to determine the optical power in the range of 800 to
1700 nm wavelength and displays measured values in µW / dB or dBm. It has
six calibrated wavelengths (850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm,
1625 nm) and can perform both absolute and relative power measurements.
The device is small, lightweight and easy to use and is equipped with a large
backlit LCD screen. The KE8000 is ideal for optical network installations,
troubleshooting and maintenance in LAN / WAN, Enterprise, Carrier Ethernet,
FTTx, PON and telecom wide area networks.
At a glance
Multi-wavelength selection and precise measurements
Absolute power measurement in dBm or µW
Relative power measurement in dB
Auto-o󰀨 function
Battery status indicator
Adapter: FC, SC, ST and 2.5 mm universal ferrule
Handy tester with large, backlit LCD display and simple operation
Meas. cable SM
2 m, Simplex
Meas. cable MM
2 m, Simplex
Coupling
LWL, Simplex
Plug-in adapter
LWL, Metall
SC / PC – SC / PC
Art. 0.57130
SC / PC – SC / PC
Art. 0.57134
SC – SC (Plastic)
Art. 0.57138
2.5 mm – 1.25 mm
Art. 1400070
SC / PC – LC / PC
Art. 0.57131
SC / PC – LC / PC
Art. 0.57135
LC – LC (Plastic)
Art. 0.57139
2.5 mm – POF
Art. 1400078
SC / PC – ST / PC
Art. 0.57132
SC / PC – ST / PC
Art. 0.57136
ST – ST (Metal)
Art. 0.57128
SC / PC – FC / PC
Art. 0.57133
SC / PC – FC / PC
Art. 0.57137
FC – FC (Metal)
Art. 0.57127

© Kurth Electronic GmbH, All Rights Reserved
4
Operation
1. ON / OFF
Press the ON / OFF button for 3 seconds to turn on the power meter. Briey
press the ON / OFF button to turn it o󰀨. The symbol displayed in the lower
left corner of the LCD indicates that the auto-o function is active and that
the unit switches o󰀨 10 minutes after the last key was pressed. A long press
of the key switches the auto-off function off, another long press of the 
key switches it on again.
2. dBm
The absolute power level measurement determines the strength of the light
signal received by the power meter. This mode is indicated on the LCD dis-
play by dBm (decibel milliwatt). Absolute power level measurement is used
when testing the outputs of optical instruments to determine whether the ins-
trument is complying with the specied operating values. Switch to µW mode
by pressing the key again.
3. Wavelength
Press the 𝛌button to select one of the calibrated wavelengths 850, 1300,
1310, 1490, 1550, and 1625 nm. After being switched on, 1310 nm appears
as the default value in the upper left corner of the display.
4. REF
Pressing the REF key displays the relative power value in dB based on the
last measured value (shown in the upper right corner). Relative level mea-
surement is often used when installing bre optic cables to determine the
end-to-end attenuation of the bre path. In this mode, the power meter is rst
connected to a stabilized light source and then the measured power level is
stored in the power meter. All further measurements are then compared to
the stored reference value, the di󰀨erence calculated and displayed in dB. To
switch between absolute measurements, press the dBm key.
5. Backlight on / o󰀨
Press the button to turn the LCD backlight on / off (auto-off on / off see
position 1).
6. Battery charge status
When the inserted batteries reach the lower state of charge, the battery indi-
cator changes to .

© Kurth Electronic GmbH, All Rights Reserved 5
Performing optical power measurements
Screw the appropriate SC, FC or ST interchangeable measuring adapter
onto the measuring connection of the KE8000. Among the measuring ad-
apters there is a built-in 2.5 mm universal measuring adapter ferrule, which
can also be used for measurements without an additional measuring adapter.
Switch on the level meter with the ON / OFF button. If the input of the power
meter is covered by the dust cap, ‘L0‘ appears in the display. The power me-
ter is now ready to measure and there is currently no signal level.
Now use the wavelength button (𝛌) to select the desired wavelength. Remo-
ve the dust protection cap and connect the power meter to the object to be
measured.
By default, the power Meter displays the dBm value of the optical signal level.
System power level or absolute power level measurement
Connect the KE8000 level meter directly or via an optical measuring cable
to your test object.
For system power level measurements, the absolute power level is measu-
red in dBm. System power levels can, for example, be measured directly
at the transmitter output Tx of an optical transmission system. Likewise, all
types of optical connections can be checked to see whether an optical signal
level is emitted.
1 2 3 4 5
www.kurthelectronic.de
Optical Power Meter
dBm
nm
ON
OFF REF
dbm
www.kurthelectronic.de
KE8000
Tx
Rx

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6
Attenuation or relative power level measurement
The relative power level is measured in dB for attenuation measurements of
bre lines or optical components (e.g. connectors).
This measurement is carried out in two steps and is performed with at least
one additional optical measuring cable and a stabilized light source, e.g.
KE8100 or KE8200.
Measuring step 1 – Reference measurement
Connect the light source and the level
meter KE8000 with a high-quality optical
measuring cable.
The power meter now displays a measu-
red value in dBm, which corresponds to
the level of the light source (level trans-
mitter) minus the attenuation of the mea-
suring cable and the insertion loss of the
plug at the light source itself.
Now press the REF key to set this level
value as the reference value.
Measuring step 2 – Attenuation measurement
Now disconnect the measuring cable
from the power meter and connect the
open end via a coupling, e.g. to the bre
section to be measured. The other end
of the bre path is now connected to the
level meter. Make sure that the connec-
tion at the power level transmitter is not
detached or altered.
The power meter now displays a relati-
ve power level in dB. This value corres-
ponds to the attenuation of the bre path
plus the insertion loss of the connector
(coupling).
www.kurthelectronic.de
Optical Power Meter
dBm
nm
ON
OFF REF
dbm
www.kurthelectronic.de
KE8000
ON Mode
KE8x00
www.kurthelectronic.de
OFF
Light Source
nm
Hz
www.kurthelectronic.de
Optical Power Meter
dBm
nm
ON
OFF REF
dbm
www.kurthelectronic.de
KE8000
ON Mode
KE8x00
www.kurthelectronic.de
OFF
Light Source
nm
Hz

© Kurth Electronic GmbH, All Rights Reserved 7
General data
Model KE8000 Optical power meter
Article number 0.49110
Fibre type Multimode, singlemode
Wavelength range 50 to 1700 nm
Calibr. Wavelengths 850, 1300, 1310, 1490, 1550, 1625 nm
Measurement adapters SC/PC, FC/PC, ST/PC, 2.5 mm universal
Detector INGaAs
Measurement range -70 to + 3 dBm
Measurement accuracy ± 5 %
Power / attenuation meas. In dBm or μW/dB
Modulation Automatic detection
Scope of delivery
Measuring device with drop protection, batteries, measuring adapters
and operating manual
General data
Measurements 160 x 76 x 28 mm
Weight 210 g
Casing Impact resistant ABS, with rubber protection
Display 2.4“ LCD
Language English
Power supply and running time
Power supply 2 x AA alkaline batteries
Running time > 70 hours with auto-o󰀨 function
Environmental condition
Operation temperature 0 – +50°C
Storing temperature -20 – +60°C
Humidity up to 93%, non-condensing

© Kurth Electronic GmbH, All Rights Reserved
8
Last revision: 09 / 2018
Maintenance
This device does not contain any parts that require maintenance. Howe-
ver, it contains sensitive electronic and optical components and should
be handled with care. When not in use, it should always be stored in the
designated transport container.
To ensure trouble-free operation:
 Always check the bre optic connector before use and clean it if
necessary.
Keep the unit free of dust and other contaminants.
Store the device at room temperature in a clean and dry place.
Avoid prolonged exposure to direct sunlight.
Do not expose the device to high humidity or strong temperature
uctuations.
Avoid unnecessary shocks and vibrations.
Clean the casing and front panel of the unit with a slightly damp
cloth.
 If liquid gets on or into the device, switch o󰀨 the device immediately,
remove the batteries and let the device dry completely.
The device is protected from splash water and dust by the front foil.
However, it is not waterproof.