8 Installing/Replacing batteries
A 9 V battery block (e.g. type IEC 6F22) is required for operation.
To insert/replace the battery, proceed as follows:
1. Unscrew the battery compartment lid on the back
(8)
and remove the lid.
2. Connect the new battery with the correct polarity to the battery clip and close the battery
compartment in reverse order.
It is necessary to change the battery when the display can no longer be read properly or when
the appliance cannot be switched on anymore.
In order to avoid damage to the appliance from leaking batteries, remove the
battery from the appliance when you do not use the appliance for a long time.
For the same reason empty batteries have to be removed immediately.
Do not leave batteries lying around carelessly. They might be swallowed by
children or pets. If swallowed, consult a doctor immediately.
Batteries must not be charged, shorted or thrown into fire. There is a danger
of explosion.
Leaking or damaged batteries may cause alkali burns if they come in contact
with the skin. Use appropriate protective gloves in such case.
A suitable Alkaline battery can be order with the following item number: Item no. 65 25 09
(please order one).
Try to use only Alkaline batteries, since they are powerful and durable.
Alternatively the measuring device can also be operated with an optional mains
supply adapter via the connector on the side
(3)
. The DC plug of the mains adapter
has to have the following characteristics:
Measurements (Inside / outside Ø): 2.1 x 5.5 mm
Polarity: Inside positive pole, outside negative pole.
Output voltage: 9 V/DC, stabilized
9 Operation
By pressing the button
MEAS
(1)
the rev counter is turned on and the laser is activated. The
measuring process starts and the device works as long as the button is held down.
Always point the measuring device with its laser outlet
(5)
away from the body and do not look
directly into the outlet during the measuring.
9.1 Measuring preparation
1.
Cut off a piece of about 12 mm length from the provided self-adhesive reflective foil. The
surface has to be dry and free of dust and grease.
2. Attach the piece to the spindle or similar to be measured.
Revolving parts have to come to a halt before the reflective markers can be at
-
tached; secure the machine against incidental activation!
3. Ensure a good contrast (light-dark); if necessary paint the objects to be measured black (in
the area of the rotating reflective marker). The non-reflecting part has always to be bigger
than the reflective marker.
9.2 Measuring of revolutions (RPM-mode)
1. Press the measuring button
(1)
once briefly to turn on the display. The display has to show
“RPM”. If not, you can switch the measuring function with the
MODE
button
(6)
.
2. Press the measuring button
(1)
and hold it down. The display shows “RPM” and the laser
is active.
3. Direct the laser beam with a maximum angle of +/- 45° to
the reflective marker. The distance between rev counter and
marker can be between 5 to 50 cm. When correctly reflect
-
ed the display show a target symbol
in the upper right
corner, which flashes in time with the measuring or remains
visible at higher revolution speed.
4. The display
(4)
shows the revolutions in “RPM” = Revolu-
tions per minute. If “OL” is displayed the measuring range has been exceeded.
5. Measuring failures can occur on very slow rotating objects; this can be prevented by at-
taching more reflective markers evenly around the object. The measuring result has to be
divided by the number of reflective markers.
6. After measuring just release the measuring button
MEAS
(1)
. The appliance turns off au-
tomatically after about 10 s.
A new measuring always starts with 0,0.
9.3 Measuring with counter (REV-mode)
The counter can be used to count items on conveyors etc. With this each recording is counted
consecutively as an event.
When using the counter, the laser has to be directed to a black or non-reflective area between
the objects in order to ensure a reliable record of the running events. Avoid diffused light from
other light sources.
1. Press the measuring button
(1)
once briefly to turn on the
display. The display has to show “REV”. If not, you can
switch the measuring function with the
MODE
button
(6)
.
2. Press the measuring button
(1)
and hold it down. The dis-
play shows “REV” and the laser is active.
3. Direct the laser beam with a maximum angle of +/- 45° to
the object to be measured. The distance between rev coun-
ter and marker can be between 5 to 50 cm. When correctly
reflected the display show a target symbol
in the upper right corner, which flashes in
time with the measuring or remains visible at higher throughput speed.
4. The display
(4)
shows the number of recorded events. If “OL” is displayed the measuring
range has been exceeded.
5. After measuring just release the measuring button
MEAS
(1)
. The appliance turns off au-
tomatically after about 10 s.
A new measuring always starts with 0.
9.4 Reading out the measurement memory
The rev counter has a memory for the measuring values where the smallest value (Min), the
most recent value (Last) and the highest value are stored. To read out the memory, proceed
as follows:
1. Press the button
MEM
(2)
briefly. The display turns on.
2. Every further pressing switches to the next measuring memory value.
3. The following displays are possible:
RPM-Mode: Max as maximum value, Min as minimum value and Last as the recent value.
REV-Mode: The most recent value is displayed.
4. The measuring results are kept in memory until the next measuring.
10 Disposal
10.1 Product
Electronic devices are recyclable waste and must not be disposed of in the house-
hold waste. At the end of its service life, dispose of the product in accordance with
applicable regulatory guidelines.
10.2 (Rechargeable) batteries
Remove any inserted (rechargeable) batteries and dispose of them separately from the prod-
uct. You as the end user are required by law (Battery Ordinance) to return all used (recharge-
able) batteries. Disposing of them in the household waste is prohibited.
Contaminated (rechargeable) batteries are labeled with this symbol to indicate that
disposal in the domestic waste is forbidden. The designations for the heavy metals
involved are: Cd = Cadmium, Hg = Mercury, Pb = Lead (name on (rechargeable)
batteries, e.g. below the trash icon on the left).
Used (rechargeable) batteries can be returned to collection points in your municipality, our
stores or wherever (rechargeable) batteries are sold. You thus fulfill your statutory obligations
and contribute to the protection of the environment.
Before disposal, the exposed contacts of batteries must be fully covered with a piece of ad-
hesive tape to prevent short-circuits. Even if batteries are depleted, the remaining energy can
become dangerous in the event of a short-circuit (bursting, severe heating, fire, explosion).
11 Technical data
11.1 Power supply
Input voltage ................................. 9 V/DC battery block or 9 V/DC stabilised via external DC
connector
Power input ................................... approx. 45 mA
Display .......................................... 5-digit LCD
Display reload ............................... 1 s
Measuring range ........................... RPM: 2 - 99,999 RPM
......................................................
REV: 1 - 99 999
Display resolution RPM ................ 0.1 (2 - 999.9 RPM)/1 (>1000 RPM)
Accuracy ....................................... ± (0.05% + 1 Digit)
Measuring time ............................. 0.5 s > 120 RPM
Measuring distance ...................... 5 - 50 cm
Automatic cut-off ........................... without measuring after approx. 10 s
11.2 Environment
Operating/Storage conditions ....... 0 to 50 °C, 10 – 90 % RH (non-condensing)
11.3 Other
Dimensions ................................... 160 x 58 x 39 mm (L x W x H)
Weight .......................................... 151 g
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com). All rights in-
cluding 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. This publication
represents the technical status at the time of printing.
Copyright 2021 by Conrad Electronic SE.
*122624_V1_1221_02_mxs_m_en
