VOLTCRAFT DT-30LK Digital Tachometer Instruction Manual

: June 5, 2024
: VOLTCRAFT

Table of Contents

Introduction
Explanation of symbols
Intended use
Delivery content
Features and functions
Safety instructions
Operating elements
Installation
Preparations for measurement
Conducting measurements
Care and cleaning
Disposal
Technical data
References
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VOLTCRAFT DT-30LK Digital Tachometer

 **Instruction Manual**

Operating Instructions

DT-30LK Tachometer

Item No. 1012206

Introduction

Dear customer,
Thank you for purchasing this product.
This product complies with the statutory national and European requirements.
To maintain this status and to ensure safe operation, you as the user must observe these operating instructions!

These operating instructions are part of this product. They contain important notes on commissioning and handling. Also consider this if you pass on the product to any third party. Therefore, retain these operating instructions for reference!

If there are any technical questions, please contact: www.conrad.com/contact

Explanation of symbols

The symbol with the exclamation mark in the triangle is used to indicate important information in these operating instructions. Always read this information carefully

The arrow symbol indicates special information and advice on operation.

Intended use

The product is designed to measure and display rotation speed and belt speed. Measurements are either non-contact via the built-in laser or per direct contact using the included adapters.
The measured values are shown on the 5-digit LC display. The product features a memory with space for 40 measured values which allows the user to retrieve the maximum, minimum and average values from a stored measuring procedure.
Power supply is via a 9 V block battery.
It is intended for indoor use only. Do not use it outdoors. Contact with moisture, e.g. in bathrooms, must be avoided under all circumstances.
For safety and approval purposes, you must not rebuild and/or modify this product. Using the product other than for its intended purpose as described above can damage the product or pose a risk of injury. Read the instructions carefully and store them in a safe place. Make this product available to third parties only together with its operating instructions.
All company names and product names are trademarks of their respective owners. All rights reserved.

Delivery content

Tachometer
3x contact adapters
Adapter holder
Extension attachment
9 V block battery
3x 20 cm reflective stripes
Carry case
Operating instructions

Up-to-date operating instructions

Download the latest operating instructions at www.conrad.com/downloads or scan the QR code shown. Follow the instructions on the website.

Features and functions

2-in-1: contact or non-contact measurement
Measuring rotation speed in RPM, Hz, m/min, in/min, ft/min and yd/min
Measuring the distance in meters (m), inches (in), foot (ft), yard (yd)
Display total number of revolutions (Event Counter)
Backlit display
Speed measurement
Distance measurement
Laser pointer

Safety instructions

Read the operating instructions carefully and especially observe the safety information. If you do not follow the safety instructions and information on proper handling in this manual, we assume no liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/guarantee.

a) General information

The device is not a toy. Keep it out of the reach of children and pets.
Do not leave packaging material lying around carelessly. This may become dangerous playing material for children.
Protect the device from extreme temperatures, direct sunlight, strong jolts, high humidity, moisture, flammable gases, steam 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.
Please handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product.
Never turn the product on immediately after it has been brought from a cold room into a warm one. The condensation generated could destroy the product. Leave the device turned off until it has reached room temperature.
Consult an expert when in doubt about the operation, safety or connection of the device.
Maintenance, modifications and repairs must only be completed by a technician or an authorised repair centre.
If you have questions which remain unanswered by these operating instructions, contact our technical support service or other technical personnel.

b) Connected devices

Also observe the safety and operating instructions of any other devices which are connected to the product.

c) (Rechargeable) batteries

Correct polarity must be observed while inserting the (rechargeable) battery.
The (rechargeable) batteries 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 (rechargeable) batteries might cause acid burns when in contact with skin, therefore use suitable protective gloves to handle corrupted (rechargeable) batteries.
(Rechargeable) batteries must be kept out of reach of children. Do not leave (rechargeable) batteries lying around, as there is risk, that children or pets swallow them.
All (rechargeable) batteries should be replaced at the same time. Mixing old and new (rechargeable) batteries in the device can lead to (rechargeable) battery leakage and device damage.
(Rechargeable) batteries must not be dismantled, short-circuited or thrown into fire. Never recharge non-rechargeable batteries. There is a risk of explosion!

d) Laser

When operating the laser equipment, always make sure that the laser beam is directed so that no one is in the projection area and that unintentionally reflected beams (e.g., from reflective objects) cannot be directed into areas where people are present.
Laser radiation can be dangerous, if the laser beam or its reflection enters unprotected eyes. Therefore, before using the laser equipment, familiarise yourself with the statutory regulations and instructions for operating such a laser device.
Never look into the laser beam and never point it at people or animals. Laser radiation can seriously damage your eyes.
If laser radiation enters your eyes, close your eyes immediately and move your head away from the beam.
If your eyes have been irritated by laser radiation, do not continue to carry out tasks with safety implications, such as working with machines, working from great heights or close to high voltage. Also, do not operate any vehicles until the irritation has completely subsided.
Do not point the laser beam at mirrors or other reflective surfaces. The uncontrolled, reflected beam may strike people or animals.
Never open the device. Setting or maintenance tasks must only be executed by a trained specialist familiar with potential hazards. Improperly executed adjustments might result in dangerous laser radiation.
The product is equipped with a class 2 laser. Laser signs in different languages are included in the package. If the sign on the laser is not written in the language of your country, please affix the appropriate sign onto the laser.
Caution: if operation settings or procedures other than those described in these instructions are used, it could lead to exposure to dangerous radiation.

Operating elements

VOLTCRAFT DT-30LK Digital Tachometer - Operating
elements

Battery compartment lid
MEM button
LC display
Laser beam exit aperture / thread
MODE button
MEAS button
Friction wheel
Inside cone
Outer cone
Adapter holder
Extension attachment

Installation

a) Inserting/Replacing the battery

Use a Phillips screwdriver to loosen the screw from the battery compartment lid (1) and remove the lid.
Connect a 9 V block battery to the corresponding connection inside the battery compartment. Only one orientation is possible. Do not use force.
Store the battery and the cable inside the battery compartment.
Close the battery compartment. Make sure that the cable is not pinched. Replace the battery when BAT appears on the display.
Remove the battery from the product if it is not used for a long period of time.

b) Attaching the case handle

On the sides of the case lock, there are two holes for attaching the case handle. There are two inward-pointing pegs on the case handle. Proceed as follows to attach the handle:

Insert one peg into one of the holes.
Carefully stretch the handle and then insert the second peg into the other hole.
To remove the handle, proceed in reverse order.

Preparations for measurement

a) Non-contact measurement

Measurements are conducted using reflection. The included self-adhesive reflective strips can be fastened to rotating objects. The reflective strips then reflect the laser beam (4) emitted by the device. A photodiode inside the device registers and analyzes the reflected laser beam. Make the following preparations:

Cut off a square piece of the reflective strip (approx. 12 x 12 mm).
Fasten this piece to the test object. Make sure that the surface is dry and free from dust and grease.

Before attaching the reflective strip, rotating components must come to a complete stop and prevent them from being switched back on.

Make sure there is a sufficient light-dark contrast. It may be necessary to paint the surface of the test object matt black around the reflective strip. The non-reflective area must be larger than the reflective strip.
You must screw the included extension attachment (11) into the thread (4). Conducting non-contact measurements without the extension attachment can result in unstable measurements.

b) Contact measurement

Screw the included extension attachment (11) into the thread (4) on the device.
Screw the adapter holder (10) into the extension attachment thread.
Select one of the three contact adapters:
– Outer cone (9), suitable for concave shaft ends
– Inside cone (8), suitable for conical shaft ends
– Friction wheel (7), suitable for measuring belt speed (e.g. fan belts, conveyor belts, belt saws, etc.)
There are two short and two long slots on the bottom of each of the three contact adapters.
Place the contact adapter you wish to use on the adapter holder’s axis so that the axis locking pin fits into one of the short slots.

Conducting measurements

Press the MEAS button (6) briefly to turn on the device.
Repeatedly press the MEM button (2) to select one of the 10 memory cells (DATA 0 to DATA 9).
The memory cell icon appears on the bottom right of the display (3).
More information on storing measured values is contained under “Storing/Retrieving measured values”.
You can choose between two sequences for units of measurement. Press and hold the MODE button (5) for approx. 3 seconds to toggle between the sequences.
Then repeatedly press the MODE button until the display shows the desired unit of measurement.

Sequence 1 Function

VOLTCRAFT DT-30LK Digital Tachometer - Sequence 1
Function

Sequence 2 Function

VOLTCRAFT DT-30LK Digital Tachometer - Sequence 2
Function

a) Non-contact measurement

Follow the steps above to select the desired unit of measurement.
Press and hold the MEAS button (6) to activate the laser (4).
Point the laser beam at right angle at the position of the reflective strip. The distance between the measuring device and the reflective strip should not exceed 3 m.
If reflection is successful, the icon appears on the top right of the display (3). The measured value is shown in the middle of the display. If the display shows “OL”, the measurement range was exceeded.
The display shows the multiplier X10 for measured values >10,000. Multiply the displayed value by 10 to obtain the correct measured value.
Release the MEAS button (6) when you have finished measuring. “HOLD” appears on the top right of the display and the measured value is frozen on the display. The device will turn off automatically after approx. 15 seconds.
Slowly rotating components may result in inaccurate measurements. In this case, attach several equally spaced reflective strips to the test object. Then divide the measuring result by the number of reflective strips to obtain the correct measured value.

b) Contact measurement

Exercise extreme caution when conducting contact measurements as rotating machine components pose a risk of serious injury should they come into contact with any body parts.

Follow the steps above to select the desired unit of measurement.
Press and hold the MEAS button (6).
Press the contact adapter (7, 8 or 9) at a right angle against the test object.
The measured value is shown in the middle of the display (3). If the display shows “OL”, the measurement range was exceeded.
The display shows the multiplier X10 for measured values >10,000. Multiply the displayed value by 10 to obtain the correct measured value.
Release the MEAS button when you have finished measuring. “HOLD” appears on the top right of the display and the measured value is frozen on the display. The device will turn off automatically after approx. 15 seconds.

c) Storing/Retrieving measured values

You can store up to ten data sets (DATA 0 to DATA 9). A data set consists of four measured values:

last registered value,
maximum value (MAX),
minimum value (MIN) and
average value (AVG).

Proceed as follows to store and retrieve measured values:

When you have finished measuring, press the MEM button (2) while holding down the MEAS button (6). The values from the current measuring procedure are stored. The display jumps to the next data set.
Release the MEAS button and conduct further measurements as needed.
To retrieve stored values, repeatedly press the MEM button until the desired data set appears on the bottom right of the display (3). The last registered value from the stored measuring process is shown in the middle of the display.
Press the MEM button briefly to toggle between the maximum value, minimum value and average value. This applies only to values stored in Sequence 1.

Stored values remain in the memory even if you replace the battery.
You can overwrite old values by selecting any memory cell, conducting measurements and storing the values following the above steps.
There are no maximum/minimum/average values for the functions from Sequence 2 (REV, M, In, FT and Yd).

Care and cleaning

Do not use any aggressive cleaning agents, rubbing alcohol or other chemical solutions as they can cause damage to the housing and malfunctioning.

Do not immerse the product in water.

The device is maintenance-free apart from occasional cleaning.
Clean the product with a dry, fibre-free cloth.
Use a longhaired, soft and clean brush and a vacuum cleaner to easily remove dust.

Disposal

a) Product

Electronic devices are recyclable waste and must not be disposed of in the household waste. At the end of its service life, dispose of the product in accordance with applicable regulatory guidelines.

Remove any inserted (rechargeable) batteries and dispose of them separately from the product.

b) (Rechargeable) batteries

You as the end user are required by law (Battery Ordinance) to return all used (rechargeable) 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.

Technical data

a) Tachometer

VOLTCRAFT DT-30LK Digital Tachometer - Tachometer

b) Laser

VOLTCRAFT DT-30LK Digital Tachometer - Laser

This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).

All rights including translation reserved. Reproduction by anymethod, 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 represent the technical status at the time of printing.

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