Primes PocketMonitor User manual

Revision 01/2017 EN
PocketMonitor
Operating Manual
35,0(6
Translation of the Original Instructions

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Contents
1 Basic Safety Instructions 5
2 Symbol Explanation 7
3 Conditions at the Installation Site 9
4 System Description 9
4.1 Measuring Principle .......................................................................................................... 10
5 Transportation 10
6 Assembly 11
6.1 Assembly Position.............................................................................................................. 11
6.2 Integration into a Laser System .................................................................................... 11
6.3 Removal from the Laser System ................................................................................... 12
7 Operating Buttons 13
8 Display 14
9 Measuring 15
9.1 Measurement Preparation.............................................................................................. 16
9.1.1 Getting the Device Ready for Operation................................................................... 16
9.2 Requirements for Accurate Measuring Results....................................................... 16
9.3 Single Measurement......................................................................................................... 18
9.4 Repetitive Measurement................................................................................................. 20
9.5 Possible Errors..................................................................................................................... 21
10 Maintenance 22
10.1 Exchanging the Battery ................................................................................................... 22
11 PMT with a Separate Absorber (OPTION) 22
12 Current Loop Interface (OPTION) 23
13 Measures for the Product Disposal 25

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14 Accessories 25
15 Technical Data 26
16 Dimensions 27
16.1 PMT 002p .............................................................................................................................. 27
16.2 PMT 01p................................................................................................................................. 28
16.3 PMT 05p................................................................................................................................. 29
16.4 PMT 30p................................................................................................................................. 30
16.5 PMT 70icu ............................................................................................................................. 31
16.6 PMT 120icu........................................................................................................................... 32
16.7 PMT 70icu sep ..................................................................................................................... 33
16.8 PMT 120icu sep................................................................................................................... 34
17 Declaration of Conformity 35

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1 Basic Safety Instructions
Intended Use
The PocketMonitor (PMT) is exclusively intended for measurements which are carried
out in or nearby the optical path of high power lasers. Other forms of usage are improper.
To ensure a safe operation, the device must only be operated according to the terms
stipulated by the manufacturer.
Using the device for unspecied use is prohibited strictly by the manufacturer. By usage
other than intended the device can be damaged or destroyed. This poses an increased
health hazard up to fatal injuries. When operating the device, it must be ensured that
there are no potential hazards to human health.
The device itself does not emit any laser radiation. During the measurement, however,
the laser beam is guided on the device which causes scattered radiation (laser class 4).
That is why the applying safety regulations are to be observed and necessary protective
measures need to be taken.
Observing Applicable Safety Regulations
Personal protection is required when humans are present in a dangerous zone with
uncovered visible or invisible laser radiation or particularly uncovered laser beam
systems, beam guiding systems or process regions. This holds true for any application
of this equipment. During measurement procedures there is always an unavoidable risk
of laser radiation through direct or reected emissions. The applicable safety regulations
are stipulated in ISO/CEN/TR standards as well as in the IEC-60825-1 regulation, in
ANSI Z 136 “Laser Safety Standards” and ANSI Z 136.1 “Safe Use of Lasers”, published
by the American National Standards Institute, and additional publications, such as the
“Laser Safety Basics”, the “LIA Laser Safety Guide”, the “Guide for the Selection of
Laser Eye Protection” and the “Laser Safety Bulletin”, published by the Laser Institute
of America, as well as the “Guide of Control of Laser Hazards”by ACGIH.
Taking Necessary Safety Measures
If there are people present within the danger zone of visible or invisible laser radiation, for
example near laser systems that are only partly covered, open beam guidance systems
or laser processing areas, the following safety measures need to be taken:
• Please wear safety goggles adapted to the laser wave length and operating mode
of the laser beam source in use.

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• Depending on the laser source, it may be necessary to wear suitable protective
clothing or protective gloves.
• Please protect yourself from direct laser radiation, scattered radiation as well as
from beams generated from laser radiation (e.g. by using appropriate shielding
walls or by weakening the radiation to a harmless level).
• Please use beam guidance- or beam absorber elements which do not emit any
hazardous particles as soon as they get in contact with laser radiation and which
resist the beam suciently.
• Please install safety switches and/or emergency safety mechanisms which enable
an immediate closure of the laser shutter.
• Please ensure a stable mounting of the measuring device in order to prevent a
relative motion of the device to the beam axis. This reduces the risk of scattered
radiation and is also necessary to ensure an optimal performance for the
measurement.
Employing Qualied Personnel
All users of the PMT must have been introduced to the handling of the measuring device
and they need to have a basic knowledge about the work with high power lasers, beam
guidance systems as well as focussing units.
Modications
The PMT must not be modied, neither constructional nor safety-related, without our
explicit permission. Modications of any kind will result in the exclusion of our liability
for resulting damages.
Liability Disclaimer
The manufacturer and the distributor of the measuring devices do not claim liability
for damages or injuries of any kind resulting from an improper use or handling of the
devices or the associated software. Neither the manufacturer nor the distributor can be
held liable by the buyer or the user for damages to people, material or nancial losses
due to a direct or indirect use of the measuring devices.

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2 Symbol Explanation
The following symbols and signal words indicate possible residual risks:
DANGER
means that death or serious physical injuries will occur if necessary safety
precautions are not taken.
WARNING
means that death or serious physical injuries can occur if necessary safety
precautions are not taken.
CAUTION
means that a slight physical injury can occur if necessary safety precautions
are not taken.
NOTICE
means that property damages can occur if necessary safety precautions
are not taken.
The device itself or the packing bears the following symbols to indicate requirements
and possible dangers:
Read and observe the operating instructions and safety guidelines
before the start-up!

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Further symbols that are not safety-relevant:
iHere you can nd useful information and helpful hints.
With the CE marking the manufacturer guarantees that his product is in
conformity with the EC guidelines.
Call for action
Call for observing (visual feedback from the device or the software)

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3 Conditions at the Installation Site
The measuring device must only be operated in a non condensing atmosphere.
4 System Description
The PocketMonitor consists of an absorber and a display as well as an operating unit.
Both components are connected via a swivel joint. In a folded state, the absorber protects
the display as well as the operating elements from damages of any kind.
For the measurement, the absorber is exposed to laser radiation. The microprocessor
based electronics measures the temperature rise of the absorber by means of which
the power of the laser beam is calculated.
The 4½ digit display either shows the measured laser power or the temperature of the
absorber.
A lithium cell supplies the PocketMonitor with current for approx. 10,000 measurements.
Depending on the dierent power ranges, six dierent absorber versions are available.
The special version has a separate absorber.
Standard Version Special Version with
Separate Absorber
Absorber
Display and
Operating Unit
Fig. 4.1: Mechanical Structure of the PocketMonitor

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4.1 Measuring Principle
The laser power is measured according to the calorimetric principle. For the ballistic
measurement, the absorber is irradiated with the laser for a dened period of time. By
means of the known heat capacity, the measured temperature rise of the absorber and
the set irradiation time, the power can be measured.
5 Transportation
NOTICE
Danger of damage
Hard impacts and dropping the device can damage electronical com-
ponents.
Handle the measuring device with care both during transport and
assembly! If possible, please use the PRIMES transport box for the
transportation.

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6 Assembly
WARNING
Danger of injuries
An improper assembly by inexperienced personnel can lead to material
damages or even personal injuries.
Read and strictly observe the safety instructions in chapter „1 Basic
Safety Instructions“ on page 5.
6.1 Assembly Position
The PocketMonitor can be assembled in any position. However, the absorber has to be
thermally insulated in order to ensure that no heat can dissipate, and the measuring
result is not distorted.
6.2 Integration into a Laser System
1. First, the laser source has to be turned o.
2. Ensure that all moving parts, e.g. robot arms etc., must be at a standstill, and that
they cannot be set in motion unintentionally.
3. Stability: When mounting the device, please ensure that a relative movement towards
the beam axis is prevented which in turn reduces the risk of scattered radiation.
WARNING
Danger of injuries
If the measuring device is moved out of the measured position, scattered
radiation is increasingly caused during the measurement operation.
When mounting the device, please ensure that it cannot be moved by
unintentional impacts or vibrations.
4. Heat insulation: When assembling the device, please ensure that no absorber heat
is lost during the measurement. Otherwise, the display values are too low. Put heat
insulating and temperature resistant material underneath the device.

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5. The absorber has to be placed in the center of the raw beam. Please ensure a
vertical beam incidence. If existent, please direct the positioning laser directly to
the tip of the absorber cone or the center of the at absorber respectively.
6. In case of measurements in a divergent beam, the beam diameter on the surface of
the absorber or the conus (PMT 70icu; 120icu) has to be approximately 30 mm. As
a rough estimation, it is possible to measure one focal width below the focus when it
comes to most focusing heads. Determine the power density that is to be expected,
and make sure that the measurement is carried out below the damage threshold.
NOTICE
Danger of damage
In close proximity to the focus the power density could reach a value
that would make the coating of the absorber melt.
Never operate the PocketMonitor in close proximity to the focus but
only use the defocused area. Not the power but the power density is
important.
6.3 Removal from the Laser System
1. First of all, the laser source has to be turned o.
2. Ensure that all moving parts, e.g. robot arms, etc. are at a standstill and that they
cannot be set in motion unintentionally.
3. Remove the device.
4. Fold the absorber and the display- and operating unit together and tighten the
locknut at the swivel joint.

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7 Operating Buttons
Display Temperature
Irradiation Time 20s
Irradiation Time 10s
Fig. 7.1: Display and operating unit of the PMT

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8 Display
After the measurement, the 4½-digit display shows the determined power in watt.
PMT-Type Order number Resolution of the Display in W
002p 400-001-005 0.01
01p 400-001-006 0.01
05p 400-001-007 0.1
30p 400-002-002 1
70icu 400-003-001 1
120icu 400-004-001 1
Fig. 8.1: Digital display of the PMT

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9 Measuring
WARNING
Danger of injuries due to scattered radiation
The PocketMonitor must not be held into the beam path by hand!
Put the PMT onto a thermally isolating, temperature-resistant surface
that simultaneously xates the device.
Wear safety goggles that are adapted to the laser wavelength used.
NOTICE
Danger of damage
The maximum admissible laser power of a PocketMonitor is measured
with an irradiation time of 10 s. After 20s the absorber would overheat.
Please mind the limit values in table Tab. 9.1.
PMT-Type Irradiation Time
10 s 20 s
002p 20 10
01p 100 50
05p 500 250
30p 3,000 1,500
70icu 7,000 3,500
120icu 12,000 6,000
Maximum Admissible Laser Power in W
Tab. 9.1: Maximum laser power depending on the irradiation time.

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9.1 Measurement Preparation
9.1.1 Getting the Device Ready for Operation
Loosen the locknut at the swivel joint. Lock Button
Locknut
Press the lock button and fold the
display- and operating unit into the
desired position.
Fasten the locknut at the swivel joint
again.
Remove protective foils from the
absorber.
9.2 Requirements for Accurate Measuring Results
1. Direct the raw beam vertically to the center (±2mm) of the absorber.
2. Do not place the absorber on metal surfaces for the measurement. The heat dissipa-
tion would inuence the measurement value. It should be placed on heat insulating
and temperature resistant surfaces.
3. Use the shutter to turn the laser on or o. The power control of lasers often causes
overshooting, which distorts the measurement.
4. The on-time of the laser should be set according to the desired measuring time
(10s or 20s). If the laser is turned on and o manually, the temporal inaccuracy
also has an influence on the measurement value. The PocketMonitor does not
check the laser irradiation time.
5. Strong airows, e.g. at a nozzle or the output coupler, should be prevented as they
can lower the measurement results.
6. The absorber has to be kept dry and clean. It can be cleaned by means of a dry
paper towel or alcohol. The cone, however, must not be touched.
7. The temperature of the absorber should either equal or be slightly lower than the
ambient temperature before the irradiation.

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8. After it has been cooled down with water, it has to be ensured that the absorber is
completely dry again. The heat capacity of the water is extremely high, and evapo-
rated water would distort the measurement result.

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9.3 Single Measurement
Turn on the device:
Press 10 s or 20 s
The PMT is ready for operation after approx.
5 seconds.
Check the temperature of the absorber:
Press TEMP
To ensure the highest measurement accu-
racy, the absorber temperature has to equal
the ambient temperature (±5°C).
Set the desired irradiation time:
Press 10 s or 20 s
Please mind the limit values in table Tab. 9.1
on page 15.
The display shows a value that is around
zero.
Turn on the laser.
ON
The display ashes; the measurement
runs automatically. or
Turn o the laser.
OFF
The measuring device counts back to
zero (depending on the absorber model
10s ... 60s). ... ... ... . . . . . . . . . . .
The measured power is displayed in
watt. For example:
After approx. 5 minutes the device turns itself
o automatically. However, it can also be
turned o manually:
Keep the TEMP button pressed and
push the 20 s button for approx. 1 second.

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CAUTION
Risk of burns!
After a measurement, the absorber can be very hot (more than 100 °C,
depending on the absorber version for a duration of up to 30 minutes).
Only touch the display- or operating unit or the swivel joint of the device.
Allow the absorber to cool down for an adequate period of time or sub-
merge it in cold water (the display- and operating unit as well as the
swivel joint must not be submerged!).

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9.4 Repetitive Measurement
CAUTION
Risk of burns!
If a measurement has already been carried out by means of the Pocket-
Monitor, the absorber can still be very hot (depending on the absorber
version for a duration of up to 30 minutes).
Only touch the display- or operating unit or the swivel joint of the device.
A new measurement only makes sense if the absorber has cooled down and its tem-
perature equals the ambient temperature.
In order to cool down the absorber, it has
to be submerged in cold water.
Do not submerge the display- or operating
unit or the swivel joint!
Press TEMP .
Observe the temperature display. As soon
as absorber temperature approx. equals
the ambient temperature (or exceeds it by
a maximum of 5°C), the absorber can be
taken out of the water.
Notice: If the display reaches the negative
range quickly, it is still too hot due to the
prior measurement and has to cool down
for a longer period of time.
Carefully dry the absorber by means of
compressed air. This cools it down to the
ambient temperature and makes it ready
for the next measurement cycle.
Proceed as described in chapter „9.3
Single Measurement“ on page 18.