OWL ZOOM 2 ZO2 User manual

Optical Wavelength Laboratories
OPERATIONS GUIDE
ZOOM 2 OPTICAL POWER METER
Model Numbers:
ZO2
ZO2V
OWL-INC.COM
Revision 1.12 Optical Wavelength Laboratories (OWL)
N9623 West US Hwy 12
Whitewater, WI 53190
Phone: [phone]
Internet: OWL-INC.COM
OWL

i
INTRODUCTION
TABLE OF CONTENTS
Introduction
Before You Begin 1
About This Manual 1
Applications 2
Active Equipment Optical Power Measurements 2
Fiber Continuity Testing 2
Patch Cord Testing 2
Attenuation (Optical Loss) Measurements 2
Description 2
Precautions 3
Safety 3
Operational 3
Connector 3
Product Label 3
General Features 4
Charger Port 4
2.5mm Universal Connector Port 4
LCD Display 4
User Controls 4
Test Procedures
Active Equipment Power Measurement 5
Fiber Continuity 6
Patch Cable Testing 7
Check MM Reference Cables with a Dual OWL MM Light Source 8
Check MM Reference Cables with a WaveSource MM Light Source 9
Check SM Reference Cables with a Laser OWL SM Laser Source 10
Check SM Reference Cables with a WaveSource SM Laser Source 11
Quick Reference Guides
ZOOM 2/Dual OWL MM Test Kit (P/N: KIT-Z2-D2xx) 12
ZOOM 2/Laser OWL SM Test Kit (P/N: KIT-Z2-L2xx) 17
Operation/Maintenance
Optional VFL Port 20
Visual Fault Location 21
Visual Fiber Identification 22
Boot Removal 23
Battery Replacement 23
Universal Port 24
Cleaning the Detector Port 25
Cleaning the Optional VFL Port 26
AUTO mode 27
Appendices
Specifications 28
Maintenance and Calibration Information 28
Contact Information 28
Optional Upgrade Information 29
Link Budget Calculation Worksheet

1
INTRODUCTION
BEFORE YOU BEGIN
All personnel testing optical fibers should be adequately trained in the field of fiber optics before using any fiber optic test equipment.
If the user is not completely familiar with testing fiber optics, they should seek competent training. Such training can be acquired from
a variety of sources, such as local hands-on training classes.
Valuable information about fiber optic testing can also be gathered from reading printed literature carefully or by thoroughly reading
supplied operations manuals.
Fiber optic testers vary from other types of test equipment due to issues such as:
1) standards-based testing
2) proper fiber optic test procedures (FOTPs)
3) "zeroing" or referencing of power levels
4) determining the correct link budget to pass or fail by
Complete understanding of each of these issues is critical for performing proper fiber optic tests.
Throughout this manual you will find various symbols that assist with understanding the procedures outlined in this manual. Below is
a list of these symbols and a short description of their purpose:
Shows a helpful tip that will make a procedure go more smoothly
Tells the user some useful information about the successful completion of a procedure
Warns the operator of a potentially dangerous condition
ABOUT THIS MANUAL

2
INTRODUCTION
APPLICATIONS
Below is a list of test and measurement applications that can be performed using the ZOOM 2 optical power meter. The procedure for
each one of these applications is covered in detail in this manual.
Active Equipment Optical Power Measurements. Active equipment should be measured periodically for correct power levels.
The transmitters in this equipment have a known power value. The ZOOM 2 can be directly attached to this equipment via a patch
cord to check whether the transmitter is within the manufacturer’s specified power range.
Fiber Continuity Testing. Continuity can be measured with the ZOOM 2 by placing a calibrated light source on one end of the fiber
and the ZOOM 2 on the other end. This is also a simple way to measure the attenuation of the fiber.
Patch Cord Testing. Fiber links that are producing incorrect results may have bad patch cords. The ZOOM 2 can be used to test the
attenuation of a patch cord to see if it is usable, or should be replaced.
Attenuation (Optical Loss) Measurements. After a fiber cable has been installed and terminated, it must be tested to determine if
the fiber is installed according to standards and specifications. A comparison of the actual power measurement and the reference
value determines if the installation will pass or fail.
This manual describes the operation of the ZOOM 2 optical power meter. ZOOM stands for Zeroed Output Optical Meter.
The ZOOM 2 is a very economical option for measuring the optical power of both multimode and singlemode fibers. The ZOOM 2 is
NIST traceable, and is calibrated 850, 1300, 1310, and 1550nm, as well as 1490nm, one of the key wavelengths used in FTTx PON
networks. Reference values used for optical loss readings are stored for each of these wavelengths.
Its user-friendly interface includes two push-buttons: one for power and wavelength selection, and one for setting references and
toggling between dBm (optical power) and dB (optical loss).
The ZOOM 2 includes a 2.5mm universal connector, which is compatible with many popular fiber connectors, such as ST, SC, and FC.
A 1.25mm universal connector port can be purchased for an additional charge that allows for connection to LC, MU, and other SFF
connectors.
The ZOOM 2 is ideal for fiber optic professionals who need to quickly measure the loss in their fiber optic links and do not require data
point storage.
For an additional charge, the charger port in the ZOOM 2 can be replaced by a precision-coupled visual fault locator optimized for fiber
optics. An optical ball lens placed near the laser output focuses the light for optimum input into fiber optic cables, and special current-
limiting electronics prevents laser burnout (a common problem with pen-style laser pointers), increasing the life of the VFL.
DESCRIPTION

3
INTRODUCTION
PRECAUTIONS
Safety - Exercise caution when working with any optical equipment. High-intensity fiber optic laser sources output potentially
dangerous high energy invisible light, and could cause serious, irreparable damage to the eye. Thus, it is recommended to
look into the connector port of a light source or the end of a fiber.
Operational - It is important to keep connector ferrules and optical connector ports clean. If dirt, dust, and oil are allowed to build up
inside connector ports, irreparable damage may occur to the optics inside the port. For best results, replace dust caps after each use.
Connector - if you have the optional Visual Fault Locator installed, do NOT insertAPC (Angled Physical Contact) connectors into the
VFLport on your ZOOM 2 as this may damage the angled ferrule on theAPC connector.
NEVER
On the back of each ZOOM 2 series optical power meter is a label similar to the one shown below containing model number, serial
number, power requirements, and special cautionary information. If the unit is enclosed in its protective boot, the boot must be
removed to view this label.
PRODUCT LABEL
MADE IN USA
BATTERY CHARGER WARNING
MODEL# ZO-2V
SERIAL# ZV13019
POWER: 9V DC
DO NOT USE THE BATTERY CHARGER
W H E N T H E R E I S A N O N -
RECHARGEABLE BATTERY IN THE
BATTERY COMPARTMENT.
Conforms to the Harmonized
European Standards EN
61326-1 and EN 61010-1.
MADE IN USA
BATTERY CHARGER WARNING
MODEL# ZO-2
SERIAL# ZO13019
POWER: 9V DC
DO NOT USE THE BATTERY CHARGER
W H E N T H E R E I S A N O N -
RECHARGEABLE BATTERY IN THE
BATTERY COMPARTMENT.
Conforms to the Harmonized
European Standards EN
61326-1 and EN 61010-1.

GENERAL FEATURES
4
INTRODUCTION
Charger Port / Optional VFL Port - Allows for charging of re-
chargable 9-volt batteries, as well as wall power operation (9VDC
transformer and 9-volt re-chargeable battery not included).
As an option, a Visual Fault Locator (VFL) can be installed
in place of the charger port.
NOT USED
2.5mm Universal Connector Port - accepts many popular 2.5mm
ferrule connectors, including ST, SC, and FC. Also, for an additional
charge, a 1.25mm universal cap is available (for connection to LC,
MU, and other SFF connectors).
LCD Display - shows optical power/loss levels, power units,
wavelength, and battery status.
- single press changes wavelength; holding button powers the
unit ON or OFF.
- single press toggles the power units between dBm, dB, and uW;
holding sets the reference for the selected wavelength.
DO NOT USE BATTERY CHARGING PORT WITH NON-
RECHARGEABLE BATTERIES. THERE IS THE
POTENTIAL FOR EXPLOSION AND DAMAGE MAY
OCCUR TO THE UNIT AND/OR THE USER.
UNITS
ZERO
3
2
4
5
6
4
56
-+
9VDC DETECTOR
13
2

Required Accessories
(1 or 2) one-meter patch cable(s) – (ensure proper connector type and fiber type)
Direct Transmitter Output Power Measurement
To measure the output power from a transmitter, use the following steps:
Connect the ZOOM 2 to the transmitter port on the active
equipment under test, as shown at right.
Press to power on the ZOOM 2 optical power meter, if
necessary.
Determine the output wavelength of the active equipment, then
press until the wavelength on the ZOOM 2 matches.
Power on the transmitter port according to manufacturer
instructions, if necessary.
Monitor the reading on the screen for a few seconds. This reading may fluctuate if the output signal is made up of digital
zeroes (0) and ones (1). In this case, estimate the average power level. To calculate maximum output power, add 3 dB to
the average power level.
Some transmitters have a diagnostic mode where the output is continuously at its maximum power. This
eliminates the need to compensate 3dB for digital data transmission. Consult the active equipment
manufacturer’s operations guide for more information.
Receive Power Measurement
The ZOOM 2 may also be used to measure optical power levels from a
transmitter through an installed link to ensure that the Receive power at the
far end is within manufacturer specifications.
Follow the same steps as above, except the ZOOM 2 must be connected to
the active equipment under test through the installed link as shown at right.
5
TEST PROCEDURES
ACTIVE EQUIPMENT POWER MEASUREMENT
Active Equipment
Transmitter Power
Measurement
dBm
. . .23.04
-
85 0
nm
Receive Power
Measurement
12345678910 11 12 12345678910 11 12
dBm
. . .24.52
-
85 0
nm

Required Accessories
(2) one-meter patch cables – (ensure proper connector type and fiber type)
Checking for Fiber Continuity
The ZOOM 2 can be used to verify continuity of a fiber link, or can be used to
trace an optical fiber if the fibers are not properly labeled. Use the following
procedure to test either multimode and singlemode cables.
Connect a fiber optic light source to the network port under test as
shown at right. Power on the light source according to
manufacturer instructions.
Press to power on the ZOOM 2 optical power meter, if
necessary.
Press until the wavelength on the ZOOM 2 matches the
output wavelength of the light source.
Take the ZOOM 2 optical power meter to the opposite end of the link under test, and connect into the first port. If the ZOOM
2 does not detect any optical power, the display will read “LO”. Continue connecting to subsequent optical ports until the
ZOOM 2 display shows an optical power reading.
If none of the ports display an optical power reading, then it is likely that there is a major connectivity problem with the link,
and further troubleshooting is necessary to determine the nature of the problem.
6
TEST PROCEDURES
FIBER CONTINUITY
12345678910 11 12 12345678910 11 12
FIBER CONTINUITY
MEASUREMENT
dBm
. . .24.52
-
85 0
nm
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

Required Accessories
(3) one-meter patch cables – (ensure proper connector type and fiber type)
(2) fiber optic adapters/couplers – (ensure proper connector type)
Patch Cable Insertion Loss
Patch cables should be tested periodically to ensure that they are okay to
use for testing. Use the following procedure to test both multimode and
singlemode patch cables.
If testing at more than one wavelength, this
procedure must be performed for each wavelength
separately.
Connect the ZOOM 2 to a fiber optic light source using the 3-
jumper reference method as shown at right. Power on the light
source according to manufacturer instructions.
Press to power on the ZOOM 2 optical power meter, if
necessary.
Press until the wavelength on the ZOOM 2 matches the output wavelength of the light source.
Press and hold for approximately 2 seconds to set the
reference. The ZOOM 2 will change to show loss in ‘dB’, and the
loss value should be very close to 0.00 dB.
Setting a reference is commonly referred to as
“zeroing”.
Remove the center cable as shown at right.
Insert a patch cable under test between the two fiber optic
adapters/couplers, then record the loss value in ‘dB’.
Repeat steps and for each patch cable being tested.
UNITS
ZERO
7
TEST PROCEDURES
PATCH CABLE TESTING
3-jumper Reference
Method Setup
Insertion Loss Test
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

8
TEST PROCEDURES
LIGHT SOURCE MODEL NUMBERS:
DO2xx
DO2-85xx
DO2-13xx
Checking ZOOM 2 Series Optical Power Meters
For Proper Operation
USING OWL DUAL OWL SERIES MULTIMODE SOURCES
Checking ZOOM 2 Series Optical Power
Meters for Proper Operation
USING A DUAL OWL MULTIMODE LIGHT SOURCE
STEP 1 - Connect ZOOM 2 and Dual OWL
Connect the ZOOM 2 and Dual OWL together with an orange
multimode patch cable as shown below.
STEP 2 - Power ON the ZOOM 2
Press to power on the
ZOOM 2.
After a few seconds, the ZOOM
2 display should read ‘LO’, and
will appear similar to the
diagram shown at right.
NOTE: the wavelength and measurement units may be different
from the display at right.
STEP 3 - Set the ZOOM 2
to ‘dBm’
Press on the ZOOM 2
until the measurement units
read ‘dBm’ as shown at right.
You may need to press the
button several times.
NOTE: it is recommended to thoroughly clean and inspect all
patch cord connectors before making any connection.
OF F
ON
U NIT S
Z E R O
dBm
.8. . .8lo
-
i850
nm
dBm
.8. . .8lo
-
i850
nm
DUAL OWL
connected to
850nm port
STEP 4 - Set ZOOM 2 to 850nm
Press on the ZOOM 2
until the wavelength display
shows ‘850nm’ as shown at
right. You may need to press
the button several times.
STEP 5 - Power ON the Dual OWL
Press to power on the
Dual OWL.
The 850nm indicator LED
should now be lit as shown at
right.
STEP 6 - Check optical power
The power reading that appears
on the ZOOM 2 display will
depend upon cable type.
Consult the table below for a list
of acceptable power readings.
STEP 7 - Replace the patch cable
The easiest way to troubleshoot low power levels is to try another
patch cable. Over time, patch cables can wear out or become
damaged the more they are used for optical loss testing.
Replacing the patch cable usually fixes the problem.
STEP 8 - Clean patch cables and optical ports
If the problem still exists after patch cable replacement, there
may be some debris, such as dust, dirt, or finger oil, that has
collected on the connector endface or in the equipment optical
ports.
Thoroughly clean and inspect the optical ports of the ZOOM 2
and the Dual OWL, as well as the fiber connector endfaces,
according to the brochures that have been included with this kit.
Several cleaning cycles may be required.
If the power level is still too low, even after a thorough cleaning
and inspection and patch cable replacement, contact OWL
technical support at 262-473-0643 for more information.
NOTE: the following steps are only required if the optical power
reading on the ZOOM 2 is too low.
AU T O
dBm
.8. . .8lo
-
850
nm
dBm
.20.00
-
850
nm
Core Size
62.5/125 µM
50/125 µM
Replace at
-21.00 dBm
-24.00 dBm
Acceptable Power Level
-19.0 to -21.0 dBm
-22.0 to -24.0 dBm
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

LIGHT SOURCE MODEL NUMBERS:
WS-MDxx
WS-MDVxx
WS-MDSDxx
Checking ZOOM 2 Series Optical Power Meters
For Proper Operation
USING OWL WAVESOURCE SERIES MULTIMODE SOURCES
TEST PROCEDURES
9
STEP 4 - Set ZOOM 2 to 850nm
Press on the ZOOM 2
until the wavelength display
shows ‘850nm’ as shown at
right. You may need to press
the button several times.
STEP 5 - Power ON the WaveSource
Press to power on the
WaveSource.
The 850nm indicator LED should
now be lit as shown at right.
STEP 6 - Check optical power
The power reading that appears
on the ZOOM 2 display will
depend upon cable type.
Consult the table below for a list
of acceptable power readings.
STEP 7 - Replace the patch cable
The easiest way to troubleshoot low power levels is to try another
patch cable. Over time, patch cables can wear out or become
damaged the more they are used for optical loss testing.
Replacing the patch cable usually fixes the problem.
STEP 8 - Clean patch cables and optical ports
If the problem still exists after patch cable replacement, there
may be some debris, such as dust, dirt, or finger oil, that has
collected on the connector endface or in the equipment optical
ports.
Thoroughly clean and inspect the optical ports of the ZOOM 2
and the WaveSource, as well as the fiber connector endfaces,
according to the brochures that have been included with this kit.
Several cleaning cycles may be required.
If the power level is still too low, even after a thorough cleaning
and inspection and patch cable replacement, contact OWL
technical support at 262-473-0643 for more information.
NOTE: the following steps are only required if the optical power
reading on the ZOOM 2 is too low.
AU T O
dBm
.8. . .8lo
-
850
nm
dBm
.20.00
-
850
nm
Checking ZOOM 2 Series Optical Power
Meters for Proper Operation
USING A WAVESOURCE MULTIMODE LIGHT SOURCE
STEP 1 - Connect ZOOM 2 and WaveSource
Connect the ZOOM 2 and WaveSource together with an orange
multimode patch cable as shown below.
STEP 2 - Power ON the ZOOM 2
Press to power on the ZOOM 2.
After a few seconds, the ZOOM
2 display should read ‘LO’, and
will appear similar to the
diagram shown at right.
NOTE: the wavelength and
measurement units may be
different from the display at right.
STEP 3 - Set the ZOOM 2 to ‘dBm’
Press on the ZOOM 2
until the measurement units
read ‘dBm’ as shown at right.
You may need to press the
button several times.
NOTE: it is recommended to thoroughly clean and inspect all
patch cord connectors before making any connection.
OF F
ON
U NIT S
Z E R O
dBm
.8. . .8lo
-
i850
nm
dBm
.8. . .8lo
-
i850
nm
WaveSource
connected to
850nm port
Core Size
62.5/125 µM
50/125 µM
Replace at
-21.00 dBm
-24.00 dBm
Acceptable Power Level
-19.0 to -21.0 dBm
-22.0 to -24.0 dBm
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

TEST PROCEDURES
Checking ZOOM 2 Series Optical Power Meters
For Proper Operation
USING OWL LASER OWL SERIES SINGLEMODE SOURCES
LIGHT SOURCE MODEL NUMBERS:
LO2xx
LO2-13xx
LO2-15xx
10
Checking ZOOM 2 Series Optical Power
Meters for Proper Operation
USING A LASER OWL SINGLEMODE LASER SOURCE
STEP 1 - Connect ZOOM 2 and Laser OWL
Connect the ZOOM 2 and Laser OWL together with a yellow
singlemode patch cable as shown below.
STEP 2 - Power ON the ZOOM 2
Press to power on the
ZOOM 2.
After a few seconds, the ZOOM
2 display should read ‘LO’, and
will appear similar to the
diagram shown at right.
NOTE: the wavelength and measurement units may be different
from the display at right.
STEP 3 - Set the ZOOM 2 to ‘dBm’
Press on the ZOOM 2
until the measurement units
read ‘dBm’ as shown at right.
You may need to press the
button several times.
NOTE: it is recommended to thoroughly clean and inspect all
patch cord connectors before making any connection.
OF F
ON
U NIT S
Z E R O
dBm
.8. . .8lo
-
i850
nm
dBm
.8. . .8lo
-
i850
nm
STEP 4 - Set ZOOM 2 to 1310nm
Press on the ZOOM 2
until the wavelength display
shows ‘1310nm’ as shown at
right. You may need to press
the button several times.
STEP 5 - Power ON the Laser OWL
Press to power on the
Laser OWL.
The 1310nm indicator LED
should now be lit as shown at
right.
STEP 6 - Check optical power
The power reading displayed on
the ZOOM 2 will probably not be
exactly -10.00 dBm as shown at
right, but should be fairly close.
Repeat this procedure for each additional patch cable that needs
testing.
STEP 7 - Replace the patch cable
The easiest way to troubleshoot low power levels is to try another
patch cable. Over time, patch cables can wear out or become
damaged the more they are used for optical loss testing.
Replacing the patch cable usually fixes the problem.
STEP 8 - Clean patch cables and optical ports
If the problem still exists after patch cable replacement, there
may be some debris, such as dust, dirt, or finger oil, that has
collected on the connector endface or in the equipment optical
ports.
Thoroughly clean and inspect the optical ports of the ZOOM 2
and the Laser OWL, as well as the fiber connector endfaces,
according to the brochures that have been included with this kit.
Several cleaning cycles may be required.
If the power level is still below -11.00 dBm, even after a thorough
cleaning and inspection and patch cable replacement, contact
OWL technical support at 262-473-0643 for more information.
NOTE: the following steps are only required if the optical power
reading on the ZOOM 2 is -11.00 dBm or below.
AU T O
dBm
.8. . .8lo
-
i3 0i
nm
dBm
.. .10.o0
-
i3 0i
nm
LASER OWL
connected to
1310nm port
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

LIGHT SOURCE MODEL NUMBERS:
WS-SDxx
WS-VSDxx
WS-MDSDxx
Checking ZOOM 2 Series Optical Power Meters
For Proper Operation
USING OWL WAVESOURCE SERIES SINGLEMODE SOURCES
TEST PROCEDURES
11
Checking ZOOM 2 Series Optical Power
Meters for Proper Operation
USING A LASER OWL SINGLEMODE LASER SOURCE
STEP 1 - Connect ZOOM 2 and Laser OWL
Connect the ZOOM 2 and Laser OWL together with a yellow
singlemode patch cable as shown below.
STEP 2 - Power ON the ZOOM 2
Press to power on the
ZOOM 2.
After a few seconds, the ZOOM
2 display should read ‘LO’, and
will appear similar to the
diagram shown at right.
NOTE: the wavelength and measurement units may be different
from the display at right.
STEP 3 - Set the ZOOM 2 to ‘dBm’
Press on the ZOOM 2
until the measurement units
read ‘dBm’ as shown at right.
You may need to press the
button several times.
NOTE: it is recommended to thoroughly clean and inspect all
patch cord connectors before making any connection.
OF F
ON
U NIT S
Z E R O
dBm
.8. . .8lo
-
i850
nm
dBm
.8. . .8lo
-
i850
nm
STEP 4 - Set ZOOM 2 to 1310nm
Press on the ZOOM 2
until the wavelength display
shows ‘1310nm’ as shown at
right. You may need to press
the button several times.
STEP 5 - Power ON the Laser OWL
Press to power on the
Laser OWL.
The 1310nm indicator LED
should now be lit as shown at
right.
STEP 6 - Check optical power
The power reading displayed on
the ZOOM 2 will probably not be
exactly -10.00 dBm as shown at
right, but should be fairly close.
Repeat this procedure for each additional patch cable that needs
testing.
STEP 7 - Replace the patch cable
The easiest way to troubleshoot low power levels is to try another
patch cable. Over time, patch cables can wear out or become
damaged the more they are used for optical loss testing.
Replacing the patch cable usually fixes the problem.
STEP 8 - Clean patch cables and optical ports
If the problem still exists after patch cable replacement, there
may be some debris, such as dust, dirt, or finger oil, that has
collected on the connector endface or in the equipment optical
ports.
Thoroughly clean and inspect the optical ports of the ZOOM 2
and the Laser OWL, as well as the fiber connector endfaces,
according to the brochures that have been included with this kit.
Several cleaning cycles may be required.
If the power level is still below -11.00 dBm, even after a thorough
cleaning and inspection and patch cable replacement, contact
OWL technical support at 262-473-0643 for more information.
NOTE: the following steps are only required if the optical power
reading on the ZOOM 2 is -11.00 dBm or below.
AU T O
dBm
.8. . .8lo
-
i3 0i
nm
dBm
.. .10.o0
-
i3 0i
nm
LASER OWL
connected to
1310nm port
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert APC connector
into either light source port

Required Accessories
(2-3) one-meter patch cables – ensure proper connector type and fiber type
(1-2) fiber optic mandrel – used for setting references with multimode cables only; see table below for mandrel sizes
multimode reference cables must be wrapped and secured around a mandrel as required by national and
international Fiber Optic Test Procedures (FOTPs). See Figure 1 above for a diagram of a mandrel wrap.
if you are testing at both 850nm and 1300nm, each light source wavelength will require its own mandrel-
wrapped patch cable.
Equipment Ports
Figure 2 shows the ports used during this procedure. These ports may vary depending upon the model of equipment.
QUICK REFERENCE GUIDES
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: DUAL OWL Series Multimode Sources PAGE 1 OF 5
12
Dual OWL multimode
light source
Detector
ZOOM 2 optical power meter
850 nm
1300 nm
FIGURE 2
Test Equipment Ports
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors
50/125 µm 62.5/125 µm
Diameter
Wraps
0.9 in. 0.7 in.
5 5
Figure 1
Mandrel Wrap

13
Verify Proper Operation of the Equipment
Connect the power meter and light source together with the first patch cable as shown in Figure 3.
Press to power on the Dual OWLmultimode light source. The 850nm port powers on first by default.
Press to power on the ZOOM 2 optical power meter.
Press several times on the ZOOM 2 until the wavelength is set to 850nm.
Compare the reading on the ZOOM 2 to Table 1 for acceptable power levels for non-mandrel wrapped reference cables.
The patch cable should be replaced if it is below the acceptable power level.
Once proper operation has been verified, remove the first patch cable from both units and set it aside.
Connect the power meter and light source together with the second patch cable as shown in Figure 3.
Compare the reading on the ZOOM 2 to Table 1 for acceptable power levels. The patch cable should be replaced if it is
below the acceptable power level.
QUICK REFERENCE GUIDES
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: DUAL OWL Series Multimode Sources PAGE 2 OF 5
FIGURE 3
Verify
Patch
Cable
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors
62.5/125 µM
50/125 µM
Replace at
-21.00 dBm
-24.00 dBm
-19.0 to -21.0 dBm
-22.0 to -24.0 dBm
TABLE 1
Core Size Acceptable Power Level

14
Verify Proper Operation of the Equipment, cont.
Once proper operation has been verified, remove the second patch cable from both units and set it aside.
Connect the power meter and light source together with the mandrel-wrapped patch cable as shown in Figure 4 below.
Compare the reading on the ZOOM 2 to Table 1 for acceptable power levels. The patch cable should be replaced if it is
below the acceptable power level.
Once proper operation has been verified, continue on to the next step.
Set Reference
Setting a reference is commonly referred to as “zeroing”.
With the power meter and light source still connected as shown in Figure 4, press and hold button on the ZOOM 2 to
set the reference for 850nm.
The ZOOM 2 display should change to show readings in ‘dB’, and the power reading should be approximately 0.00 dB. This
means that the meter and light source have been successfully “zeroed” at 850nm.
If testing at 1300nm is also required, connect a mandrel-wrapped patch cable to the 1300nm port, then
perform through . Otherwise, skip to .
UNITS
ZERO
QUICK REFERENCE GUIDES
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: DUAL OWL Series Multimode Sources PAGE 3 OF 5
FIGURE 4
Set
Optical
Reference
dBm
. . .20.00
-
850
nm
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors

15
Set Reference, cont.
Connect the 1300nm mandrel-wrapped patch cable to the detector port on the ZOOM 2.
Press several times until the ZOOM 2 is set to 1300nm.
Press and hold on the ZOOM 2 to set the reference for 1300nm. The ZOOM 2 display should show a power reading of
approximately 0.00 dB. This means that the meter and light source have been successfully “zeroed” at 1300nm.
Take Readings
Remove the patch cable from the detector port on the ZOOM 2, and bring both units to the opposite ends of the link under
test.
Connect the ZOOM 2 and Dual OWLto the link under test as shown in Figure 5 below.
Press several times until the ZOOM 2 is set to 850nm.
Record the reading for the current fiber under test.
Disconnect the patch cables from both ends of the patch panel and move to the next port on the patch panel.
Repeat and for each fiber in the cable under test until all fibers have been tested at 850nm.
For testing 1300nm, again connect to the first fiber under test, except this time use the mandrel-wrapped patch cable
connected to the 1300nm port.
UNITS
ZERO
QUICK REFERENCE GUIDES
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: DUAL OWL Series Multimode Sources PAGE 4 OF 5
12345678910 11 12 12345678910 11 12
FIGURE 5
Taking
Readings
dBm
.2. .2.00
-
850
nm
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors

16
Take Readings, cont.
Press several times until the ZOOM 2 is set to 1300nm.
Record the reading for the current fiber under test.
Disconnect the patch cables from both ends of the patch panel and move to the next port on the patch panel.
Repeat and for each fiber in the cable under test until all fibers have been tested at 1300nm.
(end of procedure)
QUICK REFERENCE GUIDES
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: DUAL OWL Series Multimode Sources PAGE 5 OF 5

Required Accessories
(2) one-meter patch cables – ensure proper connector type and fiber type
(1) fiber optic mandrel – used for setting references with multimode cables only; see table below for mandrel sizes
multimode reference cables must be wrapped and secured around a mandrel as required by national and
international Fiber Optic Test Procedures (FOTPs). See Figure 1 above for a diagram of a mandrel wrap.
Equipment Ports
Figure 2 shows the ports used during this procedure. These ports may vary depending upon the model of equipment.
17
QUICK REFERENCE GUIDES
50/125 µm 62.5/125 µm
Diameter
Wraps
0.9 in. 0.7 in.
5 5
Detector
ZOOM 2 power meter
850/1300 nm
FIGURE 2
Test Equipment Ports
(connector port on
light source may vary)
Figure 1
Mandrel Wrap
Optical Power Meter: ZOOM 2
Fiber Optic Light Source: WaveSource Series Multimode Source PAGE 1 of 4
WaveSource multimode
light source
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors

Optical Power Meter: ZOOM 2
Fiber Optic Light Source: WaveSource Series Multimode Source PAGE 2 of 4
QUICK REFERENCE GUIDES
Verify Proper Operation of the Equipment
Connect the power meter and light source together with the straight patch cable (i.e. no mandrel wrap) as shown in Figure 3.
Press to power on the WaveSource multimode light source. By default, the light source will be set to 850nm (
indicator LED on the left-hand side).
Press to power on the ZOOM 2 optical power meter.
If necessary, press several times on the ZOOM 2 until the wavelength is set to 850nm.
Compare the reading on the ZOOM 2 to Table 1 for acceptable power levels. The patch cable should be replaced if it is
lower than the acceptable power level (i.e. more negative).
Once proper operation has been verified, remove the first patch cable from both units and set it aside.
RED
Core Size
62.5/125 µM
50/125 µM
Replace at
-21.00 dBm
-24.00 dBm
Acceptable Power Level
-19.0 to -21.0 dBm
-22.0 to -24.0 dBm
TABLE 1
FIGURE 3
Verify
Patch
Cable
18
SC connectors shown here;
connector style may vary
LIGHT SOURCE
CONNECTOR PORTS
Do NOT insert angled physical
contact (APC) connectors