Retsch DM 400 User Manual

© Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany 18.07.2014 0001 Operating Manual DM400 Disc Mill Original

Safety instructions and use 10 2.2 Intended use The DM400 is a disc mill for batch or continuous fine grinding of hard brittle to medium ha

Safety instructions and use 11 liability for the functionality of the DM400 or for damage arising from an infringement of this duty. Through u

Safety instructions and use 12 CAUTION! This combination of symbol and signal word indicates a potentially hazardous situation which can lea

Safety instructions and use 13 Special safety instructions The following symbols are used in safety instructions to alert to specif-ic hazards:

Safety instructions and use 14 WARNING! This combination of symbol and signal word indicates a direct hazardous situation due to hot surface

Safety instructions and use 15 2.5 Device safety instructions Please note!  Only use original accessories and original spare parts. Failur

Safety instructions and use 16 CAUTION! Wear hearing protection! Hearing protection should be worn when a noise level of 85dB (A) is reach

Safety instructions and use 17 2.6 Safety equipment Safety equipment must be used as intended and must not be rendered unworkable or removed.

Safety instructions and use 18 4. The interlock switch (13) pulls in the sample material container after the start of grinding and locks it

Safety instructions and use 19 2.8.2 Protection against restarting The device switches off in the event of a power failure during opera-tion. 

Copyright © Copyright by Retsch GmbH Haan, Retsch-Allee 1-5 D-42781 Haan Federal Republic of Germany

Safety instructions and use 20

Technical data 21 3 Technical data 3.1 Dimensions 52 x 105 x 63 cm (width x depth x height) 3.2 Weight 228 kg (net) without griding disc

Technical data 22 3.6 Material  Maximum feed size 20mm (depending on the material)  Minimum feed quantity 20 - 30ml  Batch grinding w

Installation 23 4 Installation 4.1 Transport The device is supplied on a transport pallet with wooden cover. We recommend transporting the pa

Installation 24 4.3 Positioning DANGER! Do not walk under the transport pallet during transport. To position the disc mill you wil

Installation 25 3. After unscrewing the quick acting screws, pull the housing cover (14) back by a few centimetres. Then lift the housing cove

Installation 26 - Maximum relative humidity 80% for temperatures up to 31°C, decreasing in a linear fashion to 50% relative humidity at 40°C.

Installation 27 4.7 Switching on for the first time / function test Only switch the device on when all work described as from the chap-ter “Ins

Installation 28

Working with the disc mill 29 5 Working with the disc mill WARNING! No warranty or complaint will be accepted in the case of damage to the de

Working with the disc mill 30 5.1 Display and control panel  If the grinding chamber is open, the button (h) to lock the grinding chambe

Working with the disc mill 31 Menu change 1. To move from the "Parameter" menu to the "Check/Setup" menu, actuate the ar

Working with the disc mill 32 3. To change the grinding gap to adjust the zero point, the zero point line must be selected in the Check / Setu

Working with the disc mill 33 1. To move from the "Check/Setup" menu to the "Parameter" menu, actuate the arrow buttons (c,

Working with the disc mill 34 1. To move from the "Parameter" menu to the "Check/Setup" menu, actuate the arrow buttons (

Working with the disc mill 35 2. Select the Time menu item using the arrow buttons (c, d) and then adjust using the + / - button. If no grindin

Working with the disc mill 36 3. The hardness of the zirconium oxide grinding disc is MOHS 8.5 (HV1350). No sample material that is harder may

Working with the disc mill 37 Before switching the device on, care must be taken that the grinding chamber is locked and the sample material con

Working with the disc mill 38 5.10 Sample removal NOTICE! The grinding disc support and the housing are made from ductile cast

Cleaning 39 6 Cleaning DANGER! Mains voltage! - Before starting cleaning work, unplug the device and protect it from restarting accidentally

Table of contents 4 1 Basic construction ...

Cleaning 40 WARNING! Risk of poisoning and fire! When using detergents which are flammable or harmful to health, it is essential to heed the v

Servicing 41 7 Servicing DANGER! Mains voltage - Before starting servicing work, unplug the device and protect it from restarting accident

Servicing 42 Function part Task Test Service interval Grinding chamber sen-sor Start inhibitor Open grinding cham-ber; start; error mes-sage A

Servicing 43 CAUTION! - Risk of crushing when changing the grinding discs. - When changing grinding discs, secure them to prevent them fal

Servicing 44 DANGER! Ensure that the plug is removed from the socket again after step 5! 1. Connect the device to the power supply!

Servicing 45 7. 8. Then hold the motor shaft in place with the help of the motor shaft retainer (s). CAUTION! Do not lock the motor

Servicing 46 9. The fill hopper (4) must be removed to dismantle the fixed grind-ing disc (5). 10. To do this, manually close the grinding cha

Servicing 47 12. DANGER! Risk of crushing when changing the grinding discs. Ensure that the grinding disc does not fall on the floor. Loos

Servicing 48 Material Max. guide value tightening torque (Nm) Density g/cm³ Abrasion resistance Use for sample material Hardened steel 11-12% C

Servicing 49 7.3 Replacing the gear oil The gearbox of the motor is filled with gear oil on delivery (ISO VG 220). A removable fill screw

Table of Contents 5 7 Servicing ...

Servicing 50 5. Hold a flat container underneath the oil drain plug (n) and un-screw this using an Allen Key No. 5 until oil flows out. 6. All

Repair 51 8 Repair DANGER! Mains voltage! - Before starting repair work, unplug the device and protect it from restarting accidentally! - I

Repair 52 8.1 Checklist for troubleshooting Malfunction Possible cause Rectification of fault Mill does not start No mains connection Plug i

Repair 53

Disposal 54 9 Disposal Observe the respective statutory regulations when disposing of the de-vice. Information on disposal of electrical and e

EC Declaration of Conformity 55 10 EC Declaration of Conformity

EC Declaration of Conformity 56

Index 57 11 Index A Accident prevention ... 9 Adapting to the mains network ...

Index 58

FB-EW-805-042 Änderungsstand D 01.2014

Table of contents 6

Copyright ® Copyright by Retsch GmbH Haan, Retsch-Allee 1-5 D-42781 Haan Federal Republic of Ge

Basic construction 7 1 Basic construction 1 Display 2 Control panel 3 Main switch 4 Fill hopper 5 Fixed grinding disc 6 Moving grinding disc

Basic construction 8 a + button (change parameters and gap width, menu navigation) b - button (change parameters and gap width, menu navi

Safety instructions and use 9 2 Safety instructions and use 2.1 Requirements for the user This Operating Manual is intended for persons comm