Anton Paar DMA 35N User manual

B46IB01 3
EN
DMA 35N
Portable Density Meter
Firmware Version: V2.014
Instruction Manual

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While every precaution has been taken in the preparation of this document, Anton
Paar GmbH assumes no responsibility for technical or printing errors or omissions.
Nor is any liability assumed for damages resulting from the use of the information
contained in this instruction manual. Anton Paar GmbH does not make a commitment
to update the information in this manual. Specifications are subject to change without
notice.
All rights reserved (including translation). No part of this document may be translated,
reproduced or distributed in any form (print, photocopy, microfilm or any other
process) without the prior written permission of Anton Paar GmbH. Trade marks may
be used in this instruction manual without being marked as such. These are the
property of their respective owners and are legally protected.
Published by Anton Paar GmbH. Printed in Austria. Copyright © 2007 Anton Paar
GmbH, Graz, Austria
Contact: Anton Paar GmbH
Anton-Paar-Str. 20
A-8054 Graz / Austria - Europe
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.anton-paar.com
Date: 07.09.2007
Document number: B46IB01K.fm

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Contents
1 Introduction ....................................................................................................... 7
2 Safety Instructions ............................................................................................ 8
2.1 Safety Measures for Use in Hazardous Areas ........................................... 9
2.1.1 Starting Up and Starting Up after Service .......................................... 9
2.1.2 Battery Exchange ............................................................................... 9
2.1.3 Infrared/RS 232 Interface Port ........................................................... 9
3 Symbols in the Manual ................................................................................... 10
4 Supplied Items ................................................................................................ 11
5 Functional Description ................................................................................... 12
5.1 Front View ................................................................................................ 12
5.2 Rear View ................................................................................................ 13
5.3 Keys ......................................................................................................... 14
5.4 The Display .............................................................................................. 15
6 Operating the DMA 35N.................................................................................. 16
6.1 Connecting the Filling Tube ..................................................................... 16
6.2 Turning On the Instrument ....................................................................... 17
6.3 Turning Off the Instrument ....................................................................... 17
7 Units and Custom Functions ......................................................................... 18
7.1 Activating a Unit or Custom Function ....................................................... 18
7.2 Description of Units and Custom Functions ............................................. 19
7.3 Examples for Setting the Custom Function .............................................. 22
7.3.1 Example 1: Changing from Density (°C) to %H2SO4(°F) ................ 22
7.3.2 Example 2: Changing from Density (°C) to SG60/60
(°F, Temperature Coefficient 5·10-4·g·cm-3·K-1) ............................... 23
7.3.3 Example 3: Calculation of the Temperature Coefficient ................... 25
8 Measurement ................................................................................................... 26
8.1 Filling with the Built-in Pump .................................................................... 27

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8.2 Filling with the Plastic Syringe ..................................................................28
8.3 Storage of Measuring Results ..................................................................29
8.3.1 Manual Storage ................................................................................29
8.3.2 Automatic Storage ............................................................................29
8.4 Recalling Stored Results ..........................................................................29
8.5 Printing Stored Results .............................................................................30
8.6 Deleting Stored Results ............................................................................30
9 Maintenance .....................................................................................................31
9.1 Cleaning the Measuring Cell ....................................................................31
9.2 Cleaning the Built-in Pump .......................................................................31
9.3 Battery Exchange .....................................................................................32
10 Readjustment ...................................................................................................33
11 Data Transfer to Printer/PC ............................................................................35
12 Error Messages ................................................................................................37
13 Wetted Parts .....................................................................................................37
14 Technical Data .................................................................................................38
Appendix A: Optional Rubber Housing ..............................................................39
Appendix B: Density of Water (0 °C to 40 °C) ....................................................40
Appendix C: CE-Declaration of Conformity .......................................................41
Appendix D: EC Type Examination Certificate ..................................................42

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1 Introduction
• The DMA 35Nportable density meter measures the density of liquids in g/cm3or
kg/m3according to the U-tube principle.
• Samples are filled into the measuring cell using the built-in pipette-style pump or
a syringe.
• A temperature sensor measures the sample temperature right at the measuring
cell. The temperature is displayed and can be used internally for automatic
temperature compensation of the density reading.
• Once activated, automatic conversion of density into relative density, density at
reference temperature or concentration (H2SO4, API number, °Brix, °Baumé,
°Plato, % alcohol, etc.) is performed immediately.
• 1024 measuring results including temperature can be stored in the memory of
the DMA 35N. Results can be recalled individually, or transferred to a printer or
PC using an infrared/RS 232 interface port (option).

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2 Safety Instructions
• This instruction manual does not purport to address all of the safety problems
associated with the use of the instrument and samples. It is the responsibility of
the user of the instrument to establish safety and health practices and determine
the applicability of regulatory limitations prior to use.
• Before using the DMA 35Nread the instruction manual.
• Anton Paar GmbH warrants the proper functioning of the DMA 35N, if no
unauthorized adjustments have been made in mechanical parts, electronic parts
and firmware, and the following points are adhered to.
• Follow all hints, warnings and instructions in the instruction manual to ensure
correct and safe functioning of the DMA 35N.
• Do not use the DMA 35Nfor any purpose other than described in the instruction
manual.
• Do not use any accessories other than those supplied or approved by Anton
Paar GmbH.
• Do not operate the DMA 35Nif a malfunction is suspected, or damages or
injuries or loss of life of persons cannot be excluded under all circumstances.
• The digital density meter DMA 35Nis suitable for use in hazardous areas only if
the instrument is labelled with the ATEX registration number.
• Due to the nature of the measurement the measuring results not only depend
upon the correct use and functioning of the DMA 35N, but may also be
influenced by other factors. Therefore it is advised, that the analysis results are
plausibility tested before consequential actions are taken.
• Follow the precautions below for the handling and measurement of inflammable
samples and cleaning materials:
- Store no inflammable material near the instrument.
- Do not leave sample containers uncovered.
- Clean all spillages immediately.
- Ensure that the instrument is located in a sufficiently ventilated area, free from
inflammable gases and vapours.
• Do not expose the instrument to temperatures below 0 °C (32 °F) if water is
contained in the measuring cell or pump. Freezing water will cause rupture of
the measuring cell.
Caution:
Do not drop the DMA35N! Vigorous vibrations and mechanical
shocks will destroy the glass measuring cell. For extra
protection against breaking the measuring cell when the
instrument is dropped, use the optional rubber housing (see
Appendix A).

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2.1 Safety Measures for Use in Hazardous Areas
2.1.1 Starting Up and Starting Up after Service
• The DMA 35Nis suitable for use in hazardous areas only if the instrument is
labelled with the ATEX registration number (see Appendix D).
• The intrinsically safe DMA 35Ncan be used according to ATEX marking II 2
G EEx ib IIC T5. All instructions given in the certificate of conformity have to be
followed (see Appendix D).
• By labelling the intrinsically safe DMA 35N with the type plate according to ATEX,
Anton Paar GmbH confirms that the instrument conforms with all documents
submitted for receiving the certificate of conformity. Therefore, do not subject the
intrinsically safe DMA 35Nto alterations of any kind.
• Repaired instruments may be operated only if the repair was carried out by
Anton Paar GmbH. The type plate according to ATEX still confirms that the
intrinsically safe DMA 35Nconforms with all documents submitted for receiving
the certificate of conformity.
2.1.2 Battery Exchange
• Use only batteries of the same type and in the same level of charge.
• When exchanging the batteries, always check that the small parting plate is
inside the battery compartment chamber and properly fixed.
• After the battery exchange (outside the hazardous area), close the battery cover
and fix it with the Phillips screw.
• Check the function of the instrument: Turn the instrument on and check the
display.
2.1.3 Infrared/RS 232 Interface Port
•Never use the infrared/RS 232 interface port in hazardous areas.

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3 Symbols in the Manual
The following symbols are used in this instruction manual:
Warning:
This symbol calls attention to the risk of accidental injuries
or damage to goods. Do not proceed until the indicated
conditions for averting this threat are fully understood and met.
Caution:
This symbol calls attention to the risk of instrument damage
or measurement errors. Do not proceed until the indicated
conditions for averting this threat are fully understood and met.
Information:
This symbol calls attention to any additional information of
use to the operator.

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4 Supplied Items
1Filling tube (standard) or long filling tube (option)
2Adapter Luer 1/4" UNF (syringe filling)
3Infrared/RS 232 interface port (option)
4Plastic syringes
5Instruction manual
6Instrument box
7DMA 35N
8Adapter printer 25/9-pin (option)

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5 Functional Description
5.1 Front View
1Display
2Measuring cell
3Filling tube
4Screw plug
5Built-in pump
6Pump lock
7Operating keys
8Infrared interface connection
1
2
3
4
5
67
8

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5.2 Rear View
1Data storage key
2Battery cover
3Screw for battery cover
4Warning plate
5Type plate
6DKD calibration number (option)
7Registration number and ATEX marking (only for DMA 35NEx versions)
1
2
3
4
5
6
7

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5.3 Keys
• All keys have multiple functionality.
• A short push of a key activates its primary function.
• A long push of a key activates its secondary function.
• Further functions can be activated by pushing 2 keys simultaneously.
1"ON/OFF" key to switch the instrument on and off.
2"Recall/Delete" key to recall or delete results stored in the memory.
3"Print/Print all" key to transfer data to a printer or PC.
4"store" key to store results in the memory.
Front Rear
1
2
3
4

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5.4 The Display
1Measuring value
2Units and custom functions
3Temperature display °C/°F
4Low battery indicator
5Readjustment mode
6Set mode
7Consecutive number of values in memory
8Temperature coefficient
9Display frozen during storage procedure
10 Automatic data storage

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6 Operating the DMA 35N
6.1 Connecting the Filling Tube
• Screw in the filling tube clockwise by hand until some resistance against turning
can be felt.
• Do not use any tools to prevent damage of the thread.

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6.2 Turning On the Instrument
• Push the "ON/OFF" key for at least 2 seconds.
• The instrument performs a short self-test procedure, all required segments of
the display will light up.
• Subsequently, the °C (or °F) will start flashing, indicating that the instrument is in
the measuring mode.
6.3 Turning Off the Instrument
• Push the "ON/OFF" key until "OFF" appears on the display, then release the key.
• The DMA 35Nis automatically switched off if no key is pushed for 15 minutes.

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7 Units and Custom Functions
7.1 Activating a Unit or Custom Function
• Pushing the "ON/OFF" and "store" keys simultaneously activates the "SET"
mode. Display:
• A long push of the "store" key activates the selection of the temperature unit (°C/
°F).
- Toggle between °F and °C with a short push of the "store" key.
- Store your selection and move further to activate density or a density-related
custom function by a long push of the "store" key.
• Move through the list of choices by pushing the "store" key shortly.
• To activate the displayed function give the "store" key a long push.
• The instrument is automatically switched off, and after turning it on again the
selected density or density-related function will be displayed.
Information:
All stored results are deleted from the memory if the "SET"
mode is activated.

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7.2 Description of Units and Custom Functions
API A B D
Display of the API number for product group A, B or D, referred to reference
temperature 15 °C or 60 °F.
Product group A: Crude oil
Product group B: Fuel
Product group D: Lubricants
API A B D
SG 15/15 ou 60/60
Display of the Specific Gravity for product group A, B or D, referred to reference
temperature 15 °C or 60 °F.
Product group A: Crude oil
Product group B: Fuel
Product group D: Lubricants
API A B D
g/cm3
Display of the Density in g/cm3for product group A, B or D, referred to reference
temperature 15 °C or 60 °F.
Product group A: Crude oil
Product group B: Fuel
Product group D: Lubricants
API A B D
kg/m3
Display of the Density in kg/m3for product group A, B or D, referred to reference
temperature 15 °C or 60 °F.
Product group A: Crude oil
Product group B: Fuel
Product group D: Lubricants
SG (Specific gravity)
• Specific gravity or relative density is the density of the sample (at selected
reference temperature) divided by density of water (at selected reference
temperature).

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• The influence of sample temperature is compensated using the temperature
coefficient (g·cm-3·K-1).
Examples for temperature coefficients of common samples at 20 °C:
- Most aqueous solutions 0 to 20 %: 3x10-4
- Most aqueous solutions 10 to 50 %: 5x10-4
- Many organic liquids: 10x10-4
- The temperature coefficient can be calculated according to the formula:
ρ1... density at temperature t1
ρ2... density at temperature t2
• The reference temperatures (for example 20/04) and the temperature coefficient
(g·cm-3·K-1) have to be entered.
- The reference temperatures are entered in the unit selected (°C or °F), the
temperature coefficient always has to be entered in the unit g·cm-3·K-1.
- If SG t1/t2 is displayed in the "SET" mode, give the "store" key a long push. Now
each of the four digits of the temperatures can be subsequently set using short
pushes of the "store" key. Store each setting with a long push, this brings you
to the next digit.
- After setting the 2 reference temperatures, the temperature coefficient can be
set (from 0 to 19x10-4). A short push of the "store" key increases the digit, a
long push stores the selected number. Then the instrument switches off
automatically.
g/cm3or kg/m3
Measurement of true density in g/cm3or kg/m3at displayed measuring temperature.
%H2SO4
Display of concentration of sulfuric acid (battery acid) in % by weight at 20 °C derived
from density at measuring temperature. The measuring range is 0 to 70 %w/w.
°BRIX
Display of Brix degrees (sucrose concentration in % by weight) at 20 °C derived from
density at measuring temperature. The measuring range is 0 to 100 °Brix.
Temperature coefficient ρ1ρ2
–
t1t2
–
------------------
=

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°BAUMÉ
• Display of Baumé degrees at 60 °F. The measuring range is 0 to 100 °Baumé.
• After storing the setting with a long push of the "store" key, the temperature
coefficient can be set.
• Set the correct temperature coefficient (from 0 to 19x10-4) according to the
following procedure:
- A short push of the "store" key increases the digit.
- A long push stores the selected number.
- Then the instrument switches off automatically.
°PLATO
Display of Plato degrees at 20 °C derived from density at measuring temperature. The
measuring range is 0 to 100 °Plato.
%ALC/V, %ALC/W
• Display of alcohol concentration of ethanol/water mixtures in % by volume or by
weight at 20 °C derived from density at measuring temperature. The measuring
range is 0 to 100 %v/v (%w/w).
• Switch from % by volume (V) to % by weight (W) using a short push of the
"store" key.
PROOF
Display of Proof degrees at 60 °F derived from density at measuring temperature. The
measuring range is 0 to 200 °Proof.
CUSTOM
A custom-tailored polynomial function can be stored. Please contact your local Anton
Paar distributor.
PEr
Displays the period value of the measuring cell.
rES
Displays a value for the factory adjustment.

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7.3 Examples for Setting the Custom Function
7.3.1 Example 1: Changing from Density (°C) to %H2SO4(°F)
Switch off the DMA 35N.
Action Carry out Result
Press both
for 3 seconds
Confirm by:
Long press on
Select by:
Short press on
and confirm by:
Long press on
Select by:
Short press on
and confirm by:
Long press on
Start the set
mode
ON
OFF
+
Enter the
menu
Select the
temperature
unit
Select the
custom
function