Drello Drelloscop 1020 User manual

Translation of the original
operating instructions
DRELLOSCOP 1020

2 DRELLOSCOP 1020
Article no. of this documentation: 1.1020.2B001e
As of: 12.11.2012
DRELLO is used in these operating instructions as abbreviation for
DRELLO Ing. Paul Drewell GmbH & Co. KG.
No part of this publication may be duplicated, transmitted, transcribed,
stored to a memory device, translated into another language or computer
language in any way without prior written permission from DRELLO. In-
fringement of this copyright can also compromise product support from
DRELLO for this device. DRELLO reserves the right to make changes to
the product described within this manual without advanced notice. The
contents of the manual do not contain any contractual or other obligations
on the part of DRELLO and are not legally binding. This publication was
created with the utmost care. Suggestions for improvement can be sub-
mitted to DRELLO.
© DRELLO Ing. Paul Drewell GmbH & Co. KG
Andreas-Bornes-Strasse 46
D-41179 Mönchengladbach
Telephone: +49 - (0)2161 - 909 - 6
Telefax: +49 - (0)2161 - 909 - 700
Email: [e-mail]
Internet: www.drello.de

Table of Contents
DRELLOSCOP 1020 3
1General 5
1.1 Information on these operating instructions 5
1.2 Explanation of symbols 6
1.3 Warnings 7
1.4 Limitation of liability 8
1.5 Spare parts 8
2Safety 9
2.1 General 9
2.2 Responsibility of the operator 9
2.3 Staff requirements 11
2.3.1 Staff qualifications 11
2.3.2 Unauthorised persons 12
2.3.3 Instruction 12
2.4 Intended use 13
2.5 Device protection 13
2.6 Particular hazards 14
2.6.1 Danger from stroboscopic light flashes 14
3Technical specifications 15
4Description 17
4.1 Description of functions 17
4.2 Device overview 20
4.2.1 Front view 22
4.2.2 View from underneath 22
4.3 Menu structure 23
4.4 Type plate 24
5Transport, assembly and connection 25
5.1 Scope of supply 25
5.2 Available accessories 27
5.3 Unpacking 27
5.4 Storage 28
5.5 Requirements for the place of use 29
5.6 Mains operation 29
5.7 Connecting an external controller 30

Table of Contents
4 DRELLOSCOP 1020
6Operation 31
6.1 Switching the device ON/OFF 31
6.2 Operating 31
6.2.1 Selecting the operating mode 31
6.3 Further setting options for flash operation (manual control) 33
6.3.1 Setting the flash sequence display 33
6.3.2 Displaying the current flash duration 33
6.3.3 Setting the "Duration-Auto-Modus" variable flash duration 34
6.3.4 Setting the flash duration "Duration-Fix-Modus" 35
6.4 Further setting options for flash operation (external control) 36
6.4.1 Image shift (PHASE) 36
6.4.2 Setting the slow-motion function 37
7Maintenance and repair 38
7.1 Maintenance 38
7.2 Changing the batteries 38
7.3 Cleaning 39
7.4 Troubleshooting 39
7.5 Repairs 40
7.6 Disposal 40

General
DRELLOSCOP 1020 5
1 General
1.1 Information on these operating instructions
These operating instructions contain important instructions on han-
dling the DRELLOSCOP 1020 LED hand-held stroboscope, here-
inafter referred to as the device, during installation, operation,
maintenance and care as well as disposal.
The requirement for safe, proper and economic work on and with
the device is compliance with all specified safety and handling in-
structions.
Compliance helps to avoid danger, minimise repair costs and
downtimes and increase the reliability and the service life of the de-
vice.
In addition, local accident prevention regulations and general safety
rules for the location of the device must be complied with.
Read the operating instructions carefully before beginning any
work! They are part of the product and must be kept in the immedi-
ate vicinity of the device and be accessible to operating staff at all
times.

General
6 DRELLOSCOP 1020
1.2 Explanation of symbols
All warnings in these operating instructions are also indicated by a
warning symbol.
The following warning symbols are used throughout these operat-
ing instructions:
Symbol Meaning
General warning
Danger of electric current
General instructions and useful suggestions on
handling
Note on observing environmental regulations
for disposal

General
DRELLOSCOP 1020 7
1.3 Warnings
The warnings used in these operation instructions are indicated by
signal words that are intended to indicate the extent of the danger.
The warning symbol also indicates the type of danger.
The following warning symbols are used throughout these operat-
ing instructions:
WARNING
Risk of injury!
Consequences of failure to observe...
►Instructions for avoiding
A warning of this category indicates a potentially dangerous situa-
tion. If the dangerous situation is not avoided, it may lead to serious
injury or even death.
Follow the instructions in this warning to avoid possible danger of
serious injury or even death.
CAUTION
Damage to property by...
Consequences of failure to observe...
►Instructions for avoiding
This warning level indicates potential damage to property. If the sit-
uation is not avoided, it may lead to damage to property.
Follow the instructions in this warning to avoid material damage.
NOTE
Descriptive text…
A descriptive text contains additional information that is important
for further processing or for simplifying the procedure step ex-
plained.

General
8 DRELLOSCOP 1020
1.4 Limitation of liability
The manufacturer assumes no liability for damage and operational
faults resulting from:
■failure to observe these operating instructions,
■use for other than the intended purpose,
■deployment of non-trained or insufficiently-trained staff,
■use of non-approved equipment,
■faulty connection,
■previous work that is not part of the scope of supply,
■failure to use original replacement and accessory parts,
■technical modifications and changes not approved by DRELLO,
■failure to perform prescribed maintenance work.
With the exception of further claims, DRELLO is liable for any er-
rors or omissions within the framework of the warranty obligations
stated in the contract.
Claims for damage are excluded irrespective of the legal basis.
1.5 Spare parts
WARNING
Danger of injury due to wrong or faulty spare
parts!
Incorrect or faulty replacement parts can lead to
damage, malfunction or total breakdown of the
equipment as well endangering the safety.
►Use only the original spare parts of
the manufacturer.

Safety
DRELLOSCOP 1020 9
2 Safety
2.1 General
This section provides important instructions on all safety aspects
for optimum protection of staff as well as safe and smooth opera-
tion.
WARNING
Danger from failure to observe the safety in-
structions!
Failure to observe the safety and handling instruc-
tions listed in these operating instructions can lead
to considerable danger.
►Always pay attention to all warnings and instruc-
tions specified here.
2.2 Responsibility of the operator
Since this device is used in the commercial sector, the operator is
subject to the legal requirements for occupational safety.
In addition to the occupational safety instructions in these operating
instructions, the current safety, accident prevention and environ-
mental protection regulations relevant for operation of the device
must be complied with.
The operator must
■be informed on the current industrial safety regulations and con-
duct risk assessment to determine additional hazards specific to
the device that result from the special work conditions at its loca-
tion. These must be implemented in the form of instructions for
the operation of the device.
■continually check during the entire period of service that all oper-
ating instructions created by him comply with current regulations
and to modify them if necessary.
■clearly regulate and determine the responsibilities of the staff for
installation, operation, maintenance and cleaning

Safety
10 DRELLOSCOP 1020
■ensure that all persons handling the device have read and under-
stood these operating instructions. In addition, he must ensure
that persons are regularly trained and informed on all hazards
when using the device.
■check that staff observes the operating instructions and is aware
of safety and danger while working with the device.
■ensure that these operating instructions and all additional regula-
tions can be accessed by operating and maintenance staff.
■determine a person responsible for the device and allow him to
reject instructions from third parties that are prejudicial to safety!
■make the necessary protective equipment available to staff.
The operator is also responsible that the device is always in perfect
condition and the following therefore applies:
■The operator must ensure that the cleaning and maintenance in-
tervals stated in these operating instructions are adhered to.

Safety
DRELLOSCOP 1020 11
2.3 Staff requirements
2.3.1 Staff qualifications
WARNING
Risk of injury due to insufficient qualification!
Improper use can result in considerable damage to
persons or property.
►All activities shall only be performed by qualified
staff.
The following qualifications are stated in these operating instruc-
tions for various different fields of activities.
■Instructed person
was instructed by the operator on their assigned responsibilities
and the possible dangers resulting from improper behaviour.
■Specialist staff
is able to carry out assigned work tasks as well as recognise
and prevent possible dangers based on his/her technical train-
ing, knowledge and experience, including knowledge of appli-
cable regulations.
Only those staff members are permitted who can be expected to re-
liably perform their task. Those staff members whose responsive-
ness is affected by substances such as medication shall not be
permitted.
Allow staff to be trained or instructed and/or persons undergoing
general training to work on the device only under the constant su-
pervision of an experienced person!
NOTE
Observe age and occupational-specific regulations
at the location of the device when selecting staff.

Safety
12 DRELLOSCOP 1020
2.3.2 Unauthorised persons
WARNING
Danger for and resulting from unauthorised
persons!
Unauthorised persons who do not fulfil the require-
ments are not familiar with the dangers at the work
location.
►Do not permit unauthorised persons to be in the
vicinity of the work area.
►In case of doubt, approach the persons and
instruct them to leave the work area.
►Do not continue with work while the unauthor-
ised person is in the vicinity of the work area.
2.3.3 Instruction
Staff must be regularly instructed by the operator.
NOTE
In order to keep track and protocol all instruction
sessions, participating members of staff are re-
quired to acknowledge with their signature.

Safety
DRELLOSCOP 1020 13
2.4 Intended use
The device is portable and intended for visual checking of moving
work sequences. It is possible to connect an external controller via
machine impulse for example.
Any use other than previously stated is considered as improper
use.
WARNING
Danger from use for other than the intended
purpose!
Any use other than and/or going beyond the intend-
ed use of the device can lead to dangerous situa-
tions.
►Only use the device for its intended purpose.
►Pay attention to all specifications in these
operating instructions.
No claims of any kind will be accepted for damage resulting from
use of the appliance for other than its intended purpose. The risk
must be borne solely by the user.
2.5 Device protection
The DRELLOSCOP 1020 is protected during battery operation by
an internal self-restoring fuse, which is not replaceable. If the
DRELLOSCOP 1020 is operated via the NG-1020 mains supply,
the device is protected by the fuse of the mains supply.

Safety
14 DRELLOSCOP 1020
2.6 Particular hazards
2.6.1 Danger from stroboscopic light flashes
WARNING
Danger from stroboscopic light flashes
In rare cases, stroboscopes can cause epileptic fits
when operated at a frequency of approx. 10 – 20 Hz.
The risk increases if the contrast between the flash
and the ambient lighting is high. Even persons who
have never experienced an epileptic fit can be af-
fected. Consequent injury such as falling over can
therefore not be ruled out.
►If possible, always work in normal ambient light
conditions.
►When setting the flash sequence, begin with the
highest frequency.
►Make sure that persons suffering from epilepsy
are not in the vicinity of the device during opera-
tion.
WARNING
Danger from optical illusions!
A rotating machine part appears to be stationary at
certain settings of the device. Persons who are not
informed of this effect may reach into or be caught
by the running machine, which could lead to serious
or even fatal injuries.
►Inform all persons who stand in the vicinity of
the illuminated area on the functionality of the
device and make them aware of the danger that
can result from the optical illusion.

Technical specifications
DRELLOSCOP 1020 15
3 Technical specifications
Dimensions
Length / width 200 - 85 mm
Height / with rotary adjuster 40 - 55 mm
Weight approx. 0.5 kg
Controller
Manual controller (internal) via rotary adjuster,
120...25000 min-1 or
2...416.6 sec-1
fast finder function by multiplica-
tion/division of the set flash sequence
External controller via rectangular pulse 10...24 V
60…199999 min-1 or 1…3333 sec-1
display up to 99999 min-1 (1666.6 Hz)
or 3333.3 sec-1
smooth real-
time image shifting 0...360°
and slow-motion function, automatic input
frequency division from 416.66 sec
-1
Flash length control automatic, depending on the
flash sequence or manual by rotary
adjuster, setting range 1...250 μs
Maximum flash sequence 416.66 sec-1 or 25000 min-1
Measured value display 5-digit 7-segment display,
number height 7.6 mm
Electrics
Mains supply 3 x 1.2 V NiMH rechargeable batteries
(AA),
fast charging capability
Plug-in mains supply 5 VDC
Power consumption 400 mA @ 5 VDC
Reverse polarity protection yes
Operating time (battery) approx. 4 hours at full load
(depending on battery type, 2850 mAh)
Operating time (plug-in mains
supply) Continuous operation

Technical specifications
16 DRELLOSCOP 1020
Ambient conditions
Ambient temperature range 0 … +45 °C
Storage temperature range -20 … +60 °C
Degree of protection IP50
Illumination
LED High-performance LED, white radiating
combined with highly-efficient optics
Colour temperature 6500 K
Illumination Ø 150 mm @ 300 mm object gap
Illumination strength 3500 lx @ 200mm object gap; meas-
ured at 50 Hz and 50 µs flash length
CE declaration of conformity printed version on request
NOTE
Battery operation
Following detection of undervoltage during battery
operation (display flashes), the device can be
operated for approx. 15 minutes.

Description
DRELLOSCOP 1020 17
4 Description
4.1 Description of functions
The DRELLOSCOP 1020 is a portable LED hand-held stroboscope
for use in a harsh industrial environment.
Switching the appliance ON/OFF
The device is switched on or off by pressing the ON/OFF button.
A display test is performed after switching on. All display elements
light up for approx. 4-5 seconds and subsequently switch to the
basic setting (LED sec-1 lights up, display value is 50,000). Press-
ing the "ON/OFF" button again, switches off the device.
Internal controller (hereinafter referred to as manual control-
ler)
Flash sequence 2.00 sec
-1
...416.67 sec
-1
/ 120 min
-1
....25000 min
-1
.
Setting takes place via the rotary adjuster.
Turn clockwise → flash sequence increases
Turn anticlockwise → flash sequence decreases
Fast finder function
Pressing the "Double" button multiplies the current flash sequence
by a factor of 2. Pressing the "Halving" button divides the current
flash sequence by two. Exceeding the lower or higher flash se-
quence limit (2Hz / 416.67Hz) is not possible and in this case, mul-
tiplication or division by 2 is not performed. This function allows
convenient detection of the true flash sequence with respect to the
object motion sequence.
Explanation
If an intermittent moving object seems to be standing still, the flash
sequence corresponds to the motion sequence or the ratio is an in-
teger number. However, the highest flash sequence possible
should be set in order to produce a simple stationary image. When
this has been achieved, the flash sequence is multiplied by a factor
of 2 by pressing the "Double" button. If a doubled stationary image
is then produced, the previously set flash sequence is correct. If
however, a single stationary image is produced, the set flash se-
quence was too low. Repeated doubling of the flash sequence
helps to determine the correct motion sequence. If this is higher
than the flash sequence range of the stroboscope allows, the true
motion sequence can be determined using a following method:

Description
18 DRELLOSCOP 1020
Starting with the highest flash sequence, the first two values are
determined by reducing them, which then produces simple station-
ary images of the object. This then results in the true motion se-
quence
True motion sequence fx[Hz] = n ∙ f1[Hz]
with
[ ]
[ ] [ ]
HzfHzf
Hzf
n
21
2
−
=
Example:
Beginning with the highest flash sequence (416.66Hz), the flash
sequence is reduced until a simple stationary image results. The
flash sequence is named f1.
The flash sequence is then reduced further until another simple sta-
tionary image can be seen. The motion sequence is named f2.
To determine the "n" factor, the determined values f1and f2are in-
serted into the corresponding formula. The true motion sequence fx
cannot be determined using the formula (fx= n ∙ f1). If rotating ob-
jects are being examined, rotation-symmetrical structures such as
spoke wheels must be marked to rule out ambiguity due to sym-
metry.
External controller
Pressing the "External" button (cogwheel symbol) otherwise named
Extended External Control activates the "external control" function.
The frequency of the impulse sequence supplied then appears in
the display. The flash sequence is synchronised to the incoming
control impulses and therefore creates the impression that the ob-
ject is stationary even with heavily fluctuating movement for exam-
ple. If no control signal is supplied to the "external input", the value
0.0 appears in the display after approx. 2 seconds.
If the input frequency is greater than 416.67 sec-1, the flash se-
quence is automatically split to a permissible flash sequence value.
The displayed value corresponds to the original input frequency.
Note that a frequency input greater than 1.6666 KHz (99999 min-1)
cannot be displayed in min-1. Input frequencies greater than
3.33 kHz are not permitted, the error code (Err 1) is displayed.
Flash sequences that are smaller than 1 Hz are not permissible
and are indicated by an error code (Err 2). However, flash trigger-
ing still takes place irrespective of this error message.

Description
DRELLOSCOP 1020 19
Menu control
Additional function expansions or display values can be set via the
menu control.
Menu functions for manual control:
■Display value in sec-1
■Display value in min-1
■Flash duration display or setting
Also with extended control
■Setting of the image position and display of the phase angle in
degrees
■Setting of the slow-motion function und display of the slow-motion
angle in degrees
For further information, refer to the "Menu structure" section
NOTE
The menu level "Display value selection or func-
tions" is closed after pressing the "Menu" button
directly afterwards. The original setting remains
unchanged. For all other levels, the selected menu
functions are accepted.
Generally, all settings in the menu can be confirmed
by pressing the rotary adjuster.
Sleep function
If no settings to the device are made by the user, it is switched to
sleep mode after approx. 16 minutes. This reduces the intensity of
the display field and the keyboard considerably and the flash func-
tion is switched off. Pressing a button or the rotary adjuster switch-
es the device back to the operating mode and the flash function on.

Description
20 DRELLOSCOP 1020
4.2 Device overview
1 Display Displays the current value of the
selected function.
2 Display for min-1 Display of flashes per minute. The LED
lights up when the function is selected.
3 "Menu" button Menu control selection. The LED lights
up when the function is selected.
1
2
3
4
5
6
10
9
8
7