LinkU LM Series User manual

LM series Optical Multimeter
Description
LM series Optical Multimeter, integrates an optical power meter, a
laser source and a visual locator, is an ideal instrument used to
test power, loss, continuity and faults on fiber optic systems.
Features
Auto-wavelengths recognition,Auto power-off, Back-light
Integrated with visual fault locator
Specification
Model #
LM-2TD
LM-2CD
LM-2TP
LM-2CP
OPM
Measuring Range(dBm)
+10～-70dBm
@1550nm
＋26～－50dBm
+10～-70dBm
@1550nm
＋26～－50dBm
Display Precision
0.01dB
Calibration
Wavelength((NM(9(Wave
length(nm)
850/1300/1310/1550/1490/1625 (nm)
Detector Type
In GaAs
Display Units
dB/dBm/mW/uW
Connector
FC/ SC/ ST/ Universal
ACCURACY
±5%±1nW
Wavelength Recognition
1310/1490/1550 (input power≥-40dBm
Tone Detection
270Hz/1KHz/2KHz (input power≥-40dBm)
WLS
Output Wavelength
1310/1550nm
1310/1490/1550nm
Connector
fixed FC/PC (interchangeable FC/SC/ST customized)
Modulation Frequencies
270Hz/1KHz/2KHz
CW output power（dBm）
-5dBm ±0.5dB
Output Stability
±0.1dB@1310/1550nm; ±0.15dB@1490nm
Power Supply
2 * AA Batteries; AC/DC Adapter
Operating Temperature
-10℃~+50℃
Storage Temperature
-20℃~+70℃
Dimension &. Weight
160×58×32 mm (L×W×H) ； 160g
Standard Accessories:
FC/PC &. SC/PC adapter, carrying bag, Manual

Operation：
NO
KEY
Function
1
＞2s
LED
Switches instrument on/off.Long key press Over 2 Seconds while
powering on is to activate the instrument without Auto-off function.
Switches backlighting on/off
2
REF ＞
2s SET
Short key press to display reference level of present test wavelength. Long
key press to set a new reference level of preset test wavelength.
3
λ/ ＞2s
AWI
Short key press selects measurement wavelengths.
Long key press SELECTS measurementAWI
4
dBm/mW
Switches measurement units among dBm,dB and mw
5
ON/OFF
Switches instrument on/off.Long key press Over 2 Seconds while
powering on is to activate the instrument without Auto-off function
6
λ
Short key press selects measurement wavelengths.
7
HZ ＞ 2s
AWI
Modulated Wavelength Shifting Key:Switches modulated wavelength
and continuous wavelength
Long key press SelectsAWI
BACK：
Maintenance：
1、please disconnect the AC adapter/charger and cover the protective dust cap
once you finish using.
2．It is a good idea to clean the connector and the instrument when they get dirty
through use.Optical cleaning Pads and anhydrous alcohol is recommended.And
Please be careful not to get the detergent inside the instrument.
3．To ensure the measurement accuracy,please send the instrument to Service
Center for calibration once a year.
User self calibration:
1、Open state At the same time Press the "λ" and "dBm/dB/mw" keys，Long key
press Over 2 Seconds while
2、Press the“dBm/dB/mw”keys +0.1dBm；Press the“REF”keys -0.1dBm; If the
calibration is correct Press the switchkey to restart ，Restore normal test state.
(Note: use the fiber to connect with optical power meter to calibrate the value
until getting the desired value for calibration)
1
2
3
4
LCD:
OPM
WLS
5
6
7