contact measurement
Screw the adapter holder into the thread of the device.
1.
Select one of the three contact adapters:
2.
Outer cone (for concave shaft ends)
-
Inner cone (for tapered shaft ends)
-
Friction wheel (for measuring tape speeds, e.g. fan belts, belt conveyors, band saw, etc.)
-
The lower part of the three contact adapters features two short and two long grooves each. Place the
3.
relevant contact adapter onto the centre of the adapter holder in such a way that one of the shorter
grooves comes to rest on the locking pin.
On the back of the adapter holder, there is a small reflector strip on a black surface. This
reflector strip is indispensible for the contact measurement. Thus, check the adapter holder
before each use and, if required, replace the reflector strip.
MaKing MeasureMents
7.
Briefly press the MEAS button to switch the device on.
1.
Press and hold the MEM button to select one of the ten memory locations (DATA 0 to 9). Release the
2.
MEM button when the required memory location appears on the display (bottom right).
You find more information on saving measurement data in the section “Saving / reading
measurement data”.
You can select from two unit sequences. Press and hold the MODE button for approx. two seconds
3.
to switch between these sequences.
Then press the MODE button repeatedly until the display (top) shows the required display unit.
4.
sequence 1 sequence 2
function
RPM
REV
RPM = Revolutions per minute (contactless)
↓
↓
rPm = Revolutions per minute (contact, with cone)
rPm
M
HZ = Frequency (conta contact, with cone)
↓
↓
M/M = Metres per minute (contact, with cone)
HZ
In
I/M = Inch per minute (contact, with cone)
↓
↓
F/M = Feet per minute (contact, with cone)
M/M
FT
Y/M = Yard per minute (contact, with cone)
↓
↓
I/M
Yd
REV = Total number of revolutions (conta contact, with cone)
↓
M = Total distance in metres (contact, with friction wheel)
F/M
In = Total distance in inches (contact, with friction wheel)
↓
FT = Total distance in feet (contact, with friction wheel)
Y/M
Yd = Total distance in yards (contact, with friction wheel)
contactless measurement
Select the required unit as described above.
1.
Press and hold the MEAS button to activate the laser.
2.
Set the laser beam directly, at right angle, towards the position of the reflector strip. The distance
3.
between measurement device and reflector strip should be 5 - 50 cm.
With correct reflection, the display will show the
4.
(
(
(
·
)
)
)
icon on the upper right-hand side. The reading
itself will be displayed in the centre of the display. When OL is displayed, the measurement range
has been exceeded.
When the measurement process is finished, release the MEAS button. The top right-hand side of
5.
the display will show HOLD and the measurement value will be frozen on the display. The device will
turn off automatically after approx. 15 seconds.
With slowly rotating parts, measurement errors are possible. In such a case, attach several
reflector strips at equal distances on the object under measurement. Then divide the
measurement result by the number of reflector strips to arrive at the correct measurement
result.
contact measurement
please take special care when contact measuring, since physical contact with
rotating machine parts presents a considerable risk of injury.
Select the required unit as described above.
1.
Press and hold the MEAS button.
2.
Press the contact adapter at a right angle against the object under measurement.
3.
The reading itself will be displayed in the centre of the display. When OL is displayed, the
4.
measurement range has been exceeded.
When the measurement process is finished, release the MEAS button. The top right-hand side of
5.
the display will show HOLD and the measurement value will be frozen on the display. The device will
turn off automatically after approx. 15 seconds.
saVing / reading MeasureMent data
8.
You can save ten data sets (DATA 0 to 9). A single data set consists of four measurement values (last
displayed value of the measurement process, maximum value (MAX), minimal value (MIN) and average
value (AVG). Proceed as follows to save and read measurement data:
At the end of a measurement process, press the MEM button while pressing and holding the MEAS
1.
button. The values of the current measurement process will be saved. The display jumps to the
next data set.
Release the MEAS button and take further measurements, if required.
2.
In order to read measurement data, press and hold the MEM button until the required data set
3.
is shown on the bottom right-hand side of the display. The stored measurement process’s last-
displayed value will now appear in the centre of the display.
Briefly press the MEM button once each time to display the maximum value (MAX), minimum value
4.
(MIN) and average value (AVG).
The values will still be stored even after a battery replacement.
•
You can overwrite old measurement values by selecting any memory location, starting the
•
measurement and saving the values as described above.
With the functions REV, M, In, FT and Yd, no MAX/MIN/AVG values exist.
•
dispOsal
9.
general
In order to preserve, protect and improve the quality of environment, protect human health
and utilise natural resources prudently and rationally, the user should return unserviceable
product to relevant facilities in accordance with statutory regulations.
The crossed-out wheeled bin indicates the product needs to be disposed separately and
not as municipal waste.
Batteries / rechargeable batteries
The user is legally obliged
(battery regulation)
to return used batteries and rechargeable
batteries.
disposing used batteries in the household waste is prohibited!
Batteries/
rechargeable batteries containing hazardous substances are marked with the crossed-out
wheeled bin. The symbol indicates that the product is forbidden to be disposed via the
domestic refuse. The chemical symbols for the respective hazardous substances are
cd
=
Cadmium,
hg
= Mercury,
pb
= Lead.
You can return used batteries/ rechargeable batteries free of charge to any collecting point of
your local authority, our stores or where batteries/ rechargeable batteries are sold.
Consequently you comply with your legal obligations and contribute to environmental protection!
technical data
10.
rev counter
Operating voltage:
9 V battery or
6 V/DC via an optional power supply
Current consumption:
approx. 45 mA
Measuring range:
total: 1 to 99,999 (c contactless)
rPm: 2 to 20,000 RPM (contact)
RPM: 2 to 99,999 RPM (contactless)
Accuracy:
± (0.05 % + 1 digit)
Resolution:
0.1 (1 to 9999.9)
1 (≥ 10,000)
Sampling rate:
0.5 s (> 120 RPM)
Automatic cut-off time:
after approx. 15 seconds
Measurement distance: 5 to 50 cm
Operating temperature:
0 ºC to +50 ºC
Operating humidity:
max. 80 % (< 31 ºC)
linearly decreasing to 50 % (≥ 40 ºC)
Storage temperature:
-10 ºC to +60 ºC
Storage humidity:
0 % to 90 %
Dimensions (W x H x D)
:
58 x 160 x 39 mm
Weight:
160 g
laser
Wavelength:
630 to 670 nm
Max. output:
< 1 mW
Class:
2
Optional power supply
Output voltage:
6 V/DC
Plug Ø:
5.5 mm (outer) / 2.1 mm (inner)
Operating instructiOns
Version 07/10
dt-20lK reV cOunter
item no. 12 30 84
intended use
1.
This product is designed to measure and display revolution and tape speeds. Measurements are done
without contact via the integrated laser or with direct contact using the adapters included in delivery.
The revolution speed can be shown in the units rpm (revolutions per minute), Hz, m/min, in/min,
ft/min and yd/min. Also, a measurement process’s total number of revolutions can be displayed. The
length of run of tapes can be displayed in the units m, in, ft and yd. Readings are shown on the 5-digit
LC display. The product can store 40 readings, whereby maximum, minimum and average values of
a saved measurement process can be read. Power is provided by a 9V battery or a power supply unit
(optionally available).
This product fulfils European and national requirements related to electromagnetic compatibility
(EMC). CE conformity has been verified and the relevant statements and documents have been
deposited at the manufacturer.
Unauthorised conversion and/or modification of the device are inadmissible because of safety and
approval reasons (CE). Any usage other than described above is not permitted and can damage the
product and lead to associated risks such as short-circuit, fire, electric shock, etc. Please read the
operating instructions thoroughly and keep them for further reference.
cOntent Of deliVery
2.
Rev counter
•
3 x contact adapter
•
Adapter bracket
•
9 V battery
•
3 x reflector strip
•
Case
•
Operating instructions
•
safety instructiOns
3.
we do not assume liability for resulting damages to property or personal injury if
the product has been abused in any way or damaged by improper use or failure to
observe these operating instructions. the warranty/ guarantee will then expire!
the icon with exclamation mark indicates important information in the operating
instructions. carefully read the whole operating instructions before operating the
device, otherwise there is risk of danger.
persons / product
The product is not a toy and should be kept out of reach of children!
•
When used in conjunction with other devices, observe the operating instructions and safety notices
•
of connected devices.
Protect the product from extreme temperatures, direct sunlight, strong jolts, high humidity, moisture,
•
flammable gases, vapours and solvents.
Do not place the product under any mechanical stress.
•
If it is no longer possible to operate the product safely, take it out of operation and protect it from any
•
accidental use. Safe operation can no longer be guaranteed if the product:
is visibly damaged,
-
is no longer working properly,
-
has been stored for extended periods in poor ambient conditions or
-
has been subjected to any serious transport-related stresses.
-
In schools, training facilities, hobby or self-service workshops, handling of electrical devices must be
•
monitored by trained personnel.
When operating on commercial premises, the relevant accident prevention regulations of workers’
•
compensation boards for electrical equipment must be observed.
Do not switch the product on immediately after it has been taken from a cold to a warm environment.
•
The condensation that forms might destroy the product. Allow the product to reach room temperature
before switching it on.
Measurements should not be carried out under unfavourable ambient conditions. Adverse conditions
•
are:
Moisture or excessive humidity
-
Dust and flammable gases, vapours or solvents.
-
Thunderstorms or similar conditions such as strong electrostatic fields, etc.
-
laser
The product is equipped with a laser of laser class 2 according to EN 60 825-1: 2007.
•
The laser outlet is marked with the laser caution label. Never look into the laser beam and never
•
point it at people or animals. Laser radiation can cause damage to eyes or skin.
Do not point the laser beam at mirrors or other reflecting areas. Any inadvertent misdirecting of the
•
beam may harm people or animals. Therefore only the provided self-adhesive reflective markers are
to be used for measuring.
If the laser caution label placed on the device should not be printed in your language use the
•
provided laser caution labels in the respective language.
Batteries
The battery should be removed from the device if it is not used for a long period of time to avoid
•
damage through leaking. Leaking or damaged batteries might cause acid burns when in contact with
skin, therefore use suitable protective gloves to handle corrupted batteries.
Batteries must be kept out of reach of children. Do not leave the battery lying around, as there is risk,
•
that children or pets swallow it.
Batteries must not be dismantled, short-circuited or thrown into fire. Never recharge non-rechargeable
•
batteries. There is a risk of explosion!
Miscellaneous
Repair works must only be carried out by a specialist/ specialist workshop.
•
If you have queries about handling the device, that are not answered in this operating instruction, our
•
technical support is available under the following address and telephone number: Voltcraft
®
, 92242
Hirschau, Lindenweg 15, Germany, phone 0180 / 586 582 7
Operating eleMents
4.
1
2
6
5
3
4
MEAS button
1.
MEM button
2.
Low voltage terminal
3.
Laser / thread for adapter holder
4.
Display
5.
MODE button
6.
inserting / replacing the Battery
5.
Unscrew the screw on the battery compartment cover using a Phillips screwdriver and take off the
1.
cover of the battery compartment.
Insert a suitable 9V battery.
2.
Close the battery compartment.
3.
Replace the battery when “BAT” appears on the display.
•
Alternatively, you can run the device via a power supply unit (optionally available). For this,
•
please note the specifications in “Technical Data”.
preparing fOr MeasureMent
6.
contactless measurement
Measurement is done based on reflection. The self-adhesive reflector strips included can be attached
to rotating objects. The laser beam emitted by the device is reflected by the reflector strips. A photo
diode in the device registers the reflected laser beam and analyses it. Hence, make the following
preparations:
Cut out a square piece from the reflector strip (approx. 12 x 12 mm).
1.
Attach this piece to the object to be measured. Make sure the surface is dry and free of dust and
2.
grease.
rotating parts must always come to a complete standstill and must be secured
against being switched on again before attaching any reflector strip.
Make sure a sufficient bright/dark contrast is provided. In certain cases, the surface of the object to
3.
be measured has to be coated in matt black around the reflector strip. The non-reflecting area must
always be larger than the reflector strip.
These operating instructions are published by Voltcraft®,
Lindenweg 15, D-92242 Hirschau/ Germany, Phone +49 180 586 582 7.
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the
capture in electronic data processing systems require the prior written approval by the editor. Reprinting,
also in part, is prohibited.
The operating instructions reflect the current technical specifications at time of print.
We reserve the right to change the technical or physical specifications.
© copyright 2010 by Voltcraft®.
*02_07/10_01-SB
