SKF TKRT 21 User manual

Instructions for use
SKF TKRT 21

3EN
Safety precautions ...............................................................................4
EU Declaration of Conformity ...............................................................6
1. Instructions for use........................................................................7
2. Technical data..............................................................................10
3. Getting started: ...........................................................................11
4. General usage..............................................................................11
4.1 Rotational Speed ..................................................................................12
4.1.1 Laser mode................................................................................13
4.1.2 Contact mode ............................................................................14
4.2 Linear Speed.........................................................................................14
4.3 Distance .................................................................................................15
4.4 Settings .................................................................................................16
5. Symbols.......................................................................................17
6. Troubleshooting...........................................................................18
7. Spare parts and accessories.........................................................18
Table of contents
Original instructions

4 EN
WARNING LASER RADIATION
P
=1mW l = 650nm IEC 60825-1:2014
DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT
READ THIS FIRST
Safety precautions
Read this instruction for use fully. Follow all safety precautions to avoid
personal injury or property damage during equipment operation.
SKF cannot be responsible for damage or injury resulting from unsafe
product use, lack of maintenance or incorrect equipment operation. In case
of any uncertainties as regards the use of the equipment contact SKF.
This device is used for inspecting the movement of rotating and vibrating
objects. It may only be used in accordance with these instructions.
The device must not be opened. Modifications to the device are not
permitted. The manufacturer shall not be liable for damage resulting from
incorrect use or use contrary to the intended use. Warranty claims will also
be invalidated in this event.

5EN
WARNING:
Risk of injury!
• Moving objects should not be approached without care.
• Do not touch moving objects directly, under any circumstance.
• The device may not be used in potentially explosive areas.
• Laser class 2
• The SKF Tachometer TKRT 21 is fitted with a class 2 laser. This is located
at the front of the device.
• The laser beam can damage eyes.
• For this reason, do not stare directly at the laser beam and never direct it
at people or animals.
• Wavelength: 650 nm, output: 1 mW.
Warranty void!
• Do not expose the equipment to rough handling or heavy impacts.
• Always read and follow the operating instructions.
• Opening the housing of the instrument may result in hazardous
mishandling and voids warranty.
• The equipment should not be used in areas where there is a risk
for explosion.
• Do not expose the equipment to high humidity or direct contact with
wa ter.
• All repair work should be performed by an SKF repair shop.
Correct disposal!
• =• The electronic components in the device contain environmentally
harmful substances.
They must be disposed of in accordance with the environmental
regulations in the country of use.
NOTE:
• Suitable for use in residential, commercial and industrial area.

6 EN
EU Declaration of Conformity
TKRT 21
We, SKF MPT, Meidoornkade 14, 3992 AE Houten, The Netherlands
herewith declare under our sole responsibility that the products described
in these instructions for use, are in accordance with the conditions of the
following Directive(s):
EMC DIRECTIVE 2014/30/EU
and are in conformity with the following harmonized standards:
EN 55032:2015 (Limit class B) – Radio interference characteristics
EN 61326-1:2017 – Immunity characteristics
EN 61000-4-2:2009 – Electrostatic discharge immunity test (ESD)
EN 61000-4-3:2006+A1:2008+A2:2010 – Radiated, radio-frequency
electromagnetic field immunity test
EN 61000-4-8:2010 – Power frequency magnetic field immunity test
EN 301 489-1:2019-11 – Immunity characteristics
EN 301 489-17:2017-02 – Immunity characteristics
The laser is classified in accordance with the EN 60825-1:2014
EU RoHS DIRECTIVE (EU) 2015/863 and the following harmonized standard:
EN IEC 63000:2018: Technical documentation for the assessment of
electrical and electronic products with respect to the restriction of
hazardous substances
Houten, The Netherlands, December 2020
Mrs. Andrea Gondová
Manager Quality and Compliance

7EN
1. Instructions for use
These operating instructions are an integral part of the device. They must be
stored in an easily accessible location and passed on to subsequent users.
Ask your supplier if there is something you do not understand.
WARNING:
Read the operating instructions thoroughly and follow the instructions
provided. These operating instructions contain important information about
installing, starting up and operating the tachometer.
Pay particular attention to the safety information and warnings to prevent
injuries and product damage.
The manufacturer reserves the right to continue to develop this device
without documenting all developments. Your supplier will be pleased to
inform you as to whether these operating instructions are current.
Content of the box:
• Tachometer: SKF Tachometer TKRT 21
• Contacts: 2 cone tips and 1 wheel 6”
• Operating instructions
• 2 batteries AA (all types, rechargeable too)
• Case
Description:
A- ON OFF Button
B- Batteries compartment: 2 batteries AA must be used
C- Laser out / Connector
D- Accessories

8 EN
B
C
A
D
Fig. 1 – Tachometer SKF TKRT 21
Indication of 4
different modes
Selected mode
SKF logo
Input laser or
contact
Direct access
button function
General aspect of the device
Battery status
Value (like here
primary unit)
Chosen mode (from
direct access button)
Direct access
button function
Fig. 2 – Wireframe

9EN
1. 2.
3.
1. Direct access button left
2. Direct access button right
3. Direct access button center
Fig. 3 – Buttons

10 EN
2. Technical data
Designation TKRT 21
General
Low battery indicator Yes
Auto switch off Yes
Measurement
Optical modes rpm and Hz
Contact modes rpm and Hz, meters, feet, inch, per min and per sec
Speed capture feature Maximum, minimum or average rate
Linear Speed Meters, feet, inch, per min and per sec
Optical Measurement
Rotational speed range 1 to 99999 r/min
Accuracy ±0.01% of reading ±1 digit
Measuring distance 25 mm to 1200 mm (1 in - 47 in)
Angle of operation ±30°
Laser sensor built-in class 2 laser
Contact Measurement
Rotational speed range Max. 20000 rpm for 36000 sec
Accuracy ±0.1% of reading ±1 digit
(>120 rpm)
Contact adaptors Included with removable cones & wheel 6”
Power source 2 x AA batteries, rechargeable ones can be used
Run time ca. 12 h
Display LCD
Display update Continuous
Controls Direct selector switches
Housing material ABS (plastics)
Product dimensions 295 × 70 × 38 mm (11.6 × 2.8 × 1.5 in)
Case dimensions 260 × 85 × 180 mm (10.2 × 3.3 × 7.1 in)
Unit weight 270 g (0.6 lb)
Total weight (incl. case) 850 g (1.9 lb)
Operating temperature 0 to 40 °C (32 to 104 °F)
Storage temperature –20 to +45 °C (–4 to +113 °F)
Type of protection for
indication only
IP 40