Draper 41821 User Manual
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Draper 41821 User Manual

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300 SERIES
MULTIMETER
41821
IMPORTANT: Please read these instructions carefully to ensure the safe and effective use of this product and save
these instructions for future reference. This manual has been compiled by Draper Tools and is an integrated part of the
product with which it is enclosed and should be kept with it for future references.
This manual describes the purpose for which the product has been designed and contains all the necessary information
to ensure its correct and safe use. We recommend that this manual is read before any operation or, before performing
any kind of adjustment to the product and prior to any maintenance tasks. By following all the general safety
instructions contained in this manual, it will ensure both product and operator safety, together with longer life of the
product itself.
AlI photographs and drawings in this manual are supplied by Draper Tools to help illustrate the operation of the product.
Whilst every effort has been made to ensure accuracy of information contained in this manual, the Draper Tools policy
of continuous improvement determines the right to make modifications without prior warning.

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Summary of Contents for Draper 41821

  • Page 1 IMPORTANT: Please read these instructions carefully to ensure the safe and effective use of this product and save these instructions for future reference. This manual has been compiled by Draper Tools and is an integrated part of the product with which it is enclosed and should be kept with it for future references.

  • Page 2: Title Page

    Commercial copying, redistribution, hiring or lending is prohibited. No part of this publication may be stored in a retrieval system or transmitted in any other form or means without written permission from Draper Tools Limited. In all cases this copyright notice must remain intact.

  • Page 3: Table Of Contents

    2. CONTENTS 2.1 CONTENTS ................Page content Page TITLE PAGE INTRODUCTION ....................2 REVISION HISTORY ..................2 UNDERSTANDING THIS MANUAL ..............2 COPYRIGHT NOTICE ..................2 CONTENTS CONTENTS ......................3 GUARANTEE GUARANTEE...................... 4 INTRODUCTION GENERAL SPECIFICATIONS .................5-7 HANDLING & STORAGE..................8 HEALTH &...

  • Page 4: Guarantee

    3. GUARANTEE 3.1 GUARANTEE Draper tools have been carefully tested and inspected before shipment and are guaranteed to be free from defective materials and workmanship. Should the tool develop a fault, please return the complete tool to your nearest distributor or contact Draper Tools Limited, Chandler's Ford, Eastleigh, Hampshire, SO53 1YF.

  • Page 5: Introduction

    4. INTRODUCTION 4.1 GENERAL SPECIFICATIONS Auto ranges and manual range. Over range protection for all ranges. Max. Voltage Between Terminals And Earth Ground: 600V DC or AC Operating Altitude: 2000 meters (7000 ft.)maximum LCD Display: 19.5mm height character Max. Show Value: 1999 (3 1/2) Polarity Indication: ‘-’indicates negative polarity.
  • Page 6 4. INTRODUCTION AC Voltage Range Accuracy Resolution 200mV 0.1mV ± （ 0.8% rdg + 5 digits） 0.001V 0.01V 200V 0.1V 600V ± （ 1.0% rdg + 5 digits） - Input Impedance: 10M - Overload Protection: 200mV range: 250V DC or AC rms, 2V-600V ranges: 600V DC or AC rms.
  • Page 7 4. INTRODUCTION Resistance Range Accuracy Resolution 200Ω ± （ 1.0% rdg + 5 digits） 0.1Ω 2kΩ 0.001kΩ 20kΩ ± （ 1.0% rdg + 2 digits） 0.01kΩ 200kΩ 0.1kΩ 2MΩ 0.001MΩ 20MΩ ± （ 1.2% rdg + 5 digits） 0.01MΩ - Open Circuit Voltage: 0.25V - Overload Protection: 250V DC or 250V rms AC Continuity Test Range...

  • Page 8: Handling & Storage

    4. INTRODUCTION 4.3 HANDLING & STORAGE Care must still be taken when handling, dropping this machine will have an effect on the accuracy. The environment will have a negative result on its operation if you are not careful. If the air is damp, components will rust.

  • Page 9: Health & Safety Information

    5. HEALTH & SAFETY INFORMATION 5.1 SAFETY PRECAUTIONS This instrument complies with IEC1010 (International Electrotechnical Commission promulgated safety standards). Design and production using the pollution level 2 safety requirements. Warning To avoid electrical shock or personal injury. Please read the safety information and “warnings and precautions” before use. Warning: When measuring voltage above 30V, current above 10ma, AC power with an inductive load.

  • Page 10: Identification

    6. IDENTIFICATION LCD display window. Probe sockets. HOLD button. Backlight on and off. Function button. Max. button. Measurement function range switch.

  • Page 11: Unpacking & Checking

    Carefully remove the product from the packaging and examine it for any sign of damage caused during shipping. Lay the contents out and check them. If any part is damaged or missing, do not attempt to use the tool and contact the Draper Helpline immediately (see back page for details).

  • Page 12: Operating Instructions

    8. OPERATING INSTRUCTIONS 8.1 DATA HOLD If you need to hold the data when measuring, press the “HOLD” button, if you press the button again, the data hold will switch off. 8.2 MAXIMUM VALUE HOLD If you need data to hold the maxium data when measuring, press the “MAX” button, if you press put the button again, maximum value hold will switch off.

  • Page 13: Dc Voltage

    8. OPERATING INSTRUCTIONS 8.7 DC VOLTAGE WARNING Do not use on voltages above 600V DC. 1. Connect the black test lead to the COM probe socket and the red test lead to the V/Ω probe socket. 2. Set the measurement function range switch to the position.

  • Page 14: Resistance (Ω)

    8. OPERATING INSTRUCTIONS 8.11 RESISTANCE (Ω) 1. Connect the black test lead to the COM probe socket and the red test lead to the V/Ω probe socket. 2. Set the measurement fuction range switch to the Ω position. Notes: If the resistance is more than 1MΩ, the meter will need several seconds to staberlise its readings.

  • Page 15: Maintenance

    9. MAINTENANCE 9.1 BATTERY REPLACEMENT WARNING Before attempting to open the battery cover of the meter, be sure that test leads have been disconnected.

  • Page 16: Explanation Of Symbols 10.1 Function Keys Explained

    10. EXPLANATION OF SYMBOLS 10.1 KEYS EXPLANATIONS • "FUNC" button: Measuring the current and voltage, the meter will switch between DC and AC range. or when measuring the resistance, diode and continuity, the meter will switch to the correct measurement function. •...

  • Page 17: Explanation Of Symbols

    10. EXPLANATION OF SYMBOLS 10.2 EXPLANATION OF SYMBOLS WEEE Do not dispose of Waste Electrical Attention. & Electronic Equipment in with domestic rubbish For indoor use. High voltage / current! Do not expose to rain. Danger. Class II construction (Double insulated) Voltage AC Conforms to all relevant safety standards.

  • Page 18: Disposal

    11. DISPOSAL 11.1 DISPOSAL - At the end of the machine’s working life, or when it can no longer be repaired, ensure that it is disposed of according to national regulations. - Contact your local authority for details of collection schemes in your area. In all circumstances: •...
  • Page 19 NOTES...
  • Page 20 ©Published by Draper Tools Limited. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical photocopying, recording or otherwise without prior permission in writing from Draper Tools Ltd. DBMC0217...

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