ANDO ELECTRIC AQ7250 User manual

AQ7250
mini-OTDR
Instruction Manual
ANDO ELECTRIC CO., LTD
©Copyright ANDO ELECTRIC CO., LTD. JAPAN 1999
AS-62488-1 Rev.2.1

Preface
I
Preface
PrefacePreface
Preface
We greatly appreciate your purchase of the AQ7250 mini-OTDR.
The AQ7250 mini-OTDR is a small sized measuring instrument which is equipped with various
functions, and is used for event localization and transmission loss measurement of optical fiber
cables.
Before using the AQ7250 mini-OTDR (hereafter called the instrument), be sure to read this manual
thoroughly. Especially, read the “Safety precautions” in the opening section of this manual and
familiarize yourself with the contents, then use the instrument.
This manual should be stored with great care so that it is accessible while operating the instrument.

Warranty
II
Warranty
WarrantyWarranty
Warranty
• The guarantee period is limited to one year after you purchased the product.
• If you find that the product is defective within the guarantee period, we will repair the
product at no charge to you according to our guarantee.
• If the failure or damage is caused by the user, by a modification or change, or by a natural
disaster, even within the guarantee period, we shall not be liable for free service.
• ANDO ELECTRIC products posses certificates which guarantee quality.
• ANDO ELECTRIC products are shipped after strict inspection has been carried out
according to the ANDO ELECTRIC quality assurance system. If a defect occurs during
manufacturing, or if a defect is caused by an accident during transportation, contact the
nearest office in charge of sales, given at the end of the instruction manual.

Marks and symbols
III
Marksandsymbols
MarksandsymbolsMarksandsymbols
Marksandsymbols
Safety mark and symbol
The following marks are used as guides for the safe handling of the instrument, to prevent you or
other people from being harmed, and to prevent the instrument from being damaged. Familiarize
yourself with these symbols, then read the manual.
WARNING
This mark indicates the presence of a hazard which will cause severe
personal injury or death if the warning is ignored and the instrument is
incorrectly operated.
CAUTION
This mark indicates the presence of a hazard which may cause considerable
personal injury or property damage if the caution is ignored and the
instrument is incorrectly operated.
In addition, the following symbols are used along with the above marks to highlight the risk of
personal injury or property damage.
indicates “Attention” such as for warning and caution.
An illustration in the symbol indicates the specific warning.
(The example on the left shows a caution against fire.)
indicates “Prohibition”.
An illustration in the symbol indicates the specific
prohibition. (The example on the left shows a prohibition
against disassembly.)
indicates “Action”.
An illustration in the symbol indicates the specific action to
be taken. (The example on the left shows that the AC plug
adaptor should be removed from the socket.)
Other symbols
This is called the alert symbol.
Text following this symbol refers to an important point of safety. Be sure to observe this
notice. A combination of this symbol with “WARNING” or “CAUTION” indicates the
level of personal injury or property damage.
Indicates precautions, procedures and check items which should be referred to when
handling the instrument.
Indicates information which should be consulted when using the instrument.
Indicates a reference page described in this manual.

Safety precautions
IV
Safetyprecautions
SafetyprecautionsSafetyprecautions
Safetyprecautions
To use the instrument safely, read this instruction manual, especially the section “Safety precautions”
thoroughly. After you have read the manual, be sure to store it in an easily accessible place.
For the safety operation
This instrument is a Class I measuring instrument.
WARNING
When the AC adapter is used, be sure to provide grounding by
using a wire of AWG18 or equivalent (3 m or shorter).

Safety precautions
V
LASER SAFETY
Initial Safety Information for Laser Source Unit.
The Specifications for these Units are as follows.
AQ7254 AQ7255 AQ7259
Laser Type FP-Laser
InGaAsP FP-Laser InGaAsP FP-Laser AlGaAsP/InGaAsP
Laser Class
According to
21 CFR 1040.10
(Canada, USA)
1 1 1
Laser Class
According to
EN60825-1:1994+A11:1996
(Europe)
3A 3A 3A
Pulse Width 0.02, 0.1, 0.2, 0.5, 1, 4,
10
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1, 4, 10, 20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1
µsec
Beam Diameter 10µm 10µm 62.5µm
Wavelength 1.31/1.55±0.03µm 1.31/1.55±0.025µm 0.85/1.30±0.03µm
AQ7254B AQ7255B AQ7256B
Laser Type FP-Laser
InGaAsP FP-Laser InGaAsP FP-Laser InGaAsP
Laser Class
According to
21 CFR 1040.10
(Canada, USA)
1 1 1
Laser Class
According to
EN60825-1:1994+A11:1996
(Europe)
3A 3A 3A
Pulse Width 0.01,0.02, 0.1, 0.2, 0.5, 1, 4, 10,20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1, 4, 10, 20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1,4,10,20
µsec
Beam Diameter 10µm 10µm 10µm
Wavelength 1.31/1.55±0.03µm 1.31/1.55±0.025µm 1.31/1.55/1.625
±0.025µm

Safety precautions
VI
NOTE
Canada, USA
The Laser safety warning labels are fixed on the optical unit
NOTE
Europe
A sheet of laser safety warning labels are included with the optical unit. You MUST stick the labels in the
local language onto the outside of the mainframe, in a position where they are clearly visible to anyone using
the instrument.
You MUST return instruments with malfunctioning laser boxes to a Service Center for repair and
calibration.
WARNING
Use of controls or adjustments or performance of procedures
other than those specified for the laser source may result in
hazardous radiation exposure.
Do not emit a laser light when an optical fiber is not connected
on the optical output connector. The optical output connector
is located on the top panel of this instrument.
The LD unit emits laser light when either “REAL TIME”
or ”AVERAGING START/STOP” button is pressed. The
buttons are located on the front panel of this instrument.
“LASER ON” is displayed on the display of this instrument
while a laser light is emitted.
Under no circumstances look into the end of an optical cable
attached to the optical output when the device is operational.
The laser radiation is not visible to the human eye, but it can
seriously damage your eyesight.
Refer Servicing only to qualified and anthorized personnel.

Safety precautions
VII
LASER SAFETY
Informations et Consignew de Sécurité Relatives à l’Utilisation des Lasers.
Les Spécifications des Modules Laser sont les Suivantes:
AQ7254 AQ7255 AQ7259
Laser Type FP-Laser
InGaAsP FP-Laser InGaAsP FP-Laser AlGaAsP/InGaAsP
Laser Class
Accordingto
21 CFR 1040.10
(Canada, USA)
1 1 1
Laser Class
According to
EN60825-1:1994+A11:1996
(Europe)
3A 3A 3A
Pulse Width 0.02, 0.1, 0.2, 0.5, 1, 4, 10
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1, 4, 10, 20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1
µsec
Beam Diameter 10µm 10µm 62.5µm
Wavelength 1.31/1.55±0.03µm 1.31/1.55±0.025µm 0.85/1.30±0.03µm
AQ7254B AQ7255B AQ7256B
Laser Type FP-Laser
InGaAsP FP-Laser InGaAsP FP-Laser InGaAsP
Laser Class
Accordingto
21 CFR 1040.10
(Canada, USA)
1 1 1
Laser Class
According to
EN60825-1:1994+A11:1996
(Europe)
3A 3A 3A
Pulse Width 0.01,0.02, 0.1, 0.2, 0.5,
1, 4, 10,20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1, 4, 10, 20
µsec
0.01, 0.02, 0.1, 0.2, 0.5,
1,4,10,20
µsec
Beam Diameter 10µm 10µm 10µm
Wavelength 1.31/1.55±0.03µm 1.31/1.55±0.025µm 1.31/1.55/1.625
±0.025µm

Safety precautions
VIII
Remarque
Canada, USA
Les etiquettes de sécurité sont affichées sur le module laser.
Remarque
Europe
Les etiquettes de sécurité sont incluses dans le module laser. Il est obligatoire de coller une
etiquette en langage local à l’exterieur de l’appareil de telle sorte qu’elle soit parfaitement visible
par l’utilisateur.

Safety precautions
IX
Il est obligatoire de retourner tout appareil présentant un défaut de fonctionnement du laser
uniquement à un centre de réparation. radiations
WARNING
L’utilisation du laser en dehors de ses limites de performances
et des procédures définies par peut conduire à une exposition
dangereuse de l’utilisateur aux radiations.
Ne pas émettre de lumière quand la fibre optique n’est pas
connecté au connecteur de sorite.
Le connecteur optique de sorite est placé sur le paneau du
dessus de cet instrument.
La diode laser émet quand le bouton <REAL TIME> ou
<AVERAGING START/STOP> est activé
Ces boutons sont situés sur la face avant de cet instrument.
<LASER ON> s’affiche sur l’affichage de cet instrument
pendent l’émlssion de la lumière.
En aucun cas ne tenter de regarder l’extrémité de la fibre
optique attachée au connecteur lorsque le laser est en activité.
Bien que la lumière émise par le laser ne soit pas visible elle
peut cependant être dangereuse pour la vue.
Seul le personnel autorisé par est qualifié pour intervenir sur le
laser.