OHAUS MB35 User manual

Instruction Manual
MB35 Moisture Analyzer
Manual de instrucciones
Analizador de humedad MB35
Guide d’utilisateur
Analyseur d’humidité MB35

MB35 EN-1
Contents
1. INTRODUCTION .....................................................................................................EN-2
1.1 Safety Precautions ......................................................................................................EN-2
2. INSTALLATION ..........................................................................................................EN-4
2.1 Unpacking and Checking Equipment..............................................................................EN-4
2.2 Selecting the Location..................................................................................................EN-4
2.3 Installing the Heat Shield, Draft Shield and Pan Support ...................................................EN-4
2.4 Connecting to a Power Supply ......................................................................................EN-5
2.5 Operating Controls ......................................................................................................EN-6
3. MOISTURE ANALYZER SETUP .....................................................................................EN-7
3.1 Language Settings ......................................................................................................EN-7
3.2 Weight Calibration ......................................................................................................EN-8
3.3 Temperature Calibration ...............................................................................................EN-9
3.4 Time and Date Setting................................................................................................EN-10
3.5 RS232 Settings.........................................................................................................EN-11
3.6 Setting Print and GLP Printing On or Off........................................................................EN-12
3.7 Adjusting Display Contrast and Brightness....................................................................EN-13
4. OPERATING YOUR MOISTURE ANALYZER ...................................................................EN-14
4.1 Setting the Drying Temperature....................................................................................EN-14
4.2 Setting the Drying Time ..............................................................................................EN-14
4.3 Sample Preparation...................................................................................................EN-14
4.4 Running the Test.......................................................................................................EN-15
4.5 RS232 Command Table ............................................................................................EN-16
5. CARE AND MAINTENANCE ........................................................................................EN-17
5.1 Cleaning Interior/Exterior Components..........................................................................EN-17
5.2 Replacing Power Line Fuse ........................................................................................EN-18
5.3 Resetting the Dryer Thermal Overload Device ................................................................EN-18
5.4 Accessories..............................................................................................................EN-19
5.5 Specifications...........................................................................................................EN-19
6. COMPLIANCE ..........................................................................................................EN-20

EN-2 MB35
1. Introduction
Thank you for deciding to purchase a MB35 Halogen Moisture Analyzer from Ohaus. Behind your
instrument stands OHAUS, a leading manufacturer of precision Moisture Analyzers, Balances, Scales and
Indicators. An Aftermarket Department with trained instrument technicians is dedicated to provide you
with the fastest service possible in the event your instrument requires servicing.
1.1 Safety Precautions
Your Moisture Analyzer employs state of the art technology and meets the latest
demands regarding instrument safety. Improper operation can endanger personnel
and can cause property damage. For safe and dependable operation, please comply
with the following instructions:
—The Moisture Analyzer is used for determination of the moisture in samples.
Please use the instrument exclusively for this purpose. Any other type of use can
endanger personnel and damage the instrument or other property.
—The Moisture Analyzer must not be operated in a hazardous environment and
only under ambient conditions specified in these instructions.
—The Moisture Analyzer may be operated only by trained personnel who are
familiar with the properties of the samples used and with the handling of the
instrument.
—Your Moisture Analyzer is supplied with a 3-pin power cable with an equipment
grounding conductor is prohibited.
The Halogen Moisture Analyzer works with heat!
—Ensure sufficient free space around the instrument to avoid heat accumulation
and overheating (approximately 1 m free space above the instrument).
—Never place flammable materials on, below or next to the instrument as the area
around the dryer unit warms up.
—Exercise caution when removing the sample. The sample itself, the sample
chamber and any sample containers may still be very hot.
—During operation, you should never open the dryer unit as the ring-shaped
heating element or completely.

MB35 EN-3
1.1 Safety Precautions (Cont.)
Certain samples require special care!
With certain types of samples, there is a possibility of danger to personnel or damage
to property through:
Fire or explosion:
—Flammable or explosive substances;
—Substances containing solvents;
—Substances which release flammable or explosive vapors when heated. With
such samples, work at a drying temperature that is low enough to prevent the
formation of flames or an explosion and wear protective goggles. Should there be
any uncertainty regarding the flammability of a sample, always work with a small
sample (maximum. 1 gram). In such cases, never leave the instrument
unattended! In cases of doubt, perform a careful risk analysis.
Poisoning, burning:
—Substances which contain toxic or caustic components. Such substances may be
dried only in a fume hood.
Corrosion:
—Substances which release corrosive vapors when heated (e.g. acids). In the case
of such substances, we advise you to work with small amounts of samples as
the vapor can condense on cooler housing parts and cause corrosion. Please
note that the user always takes responsibility and assumes liability for damage
caused by use of the types of samples mentioned above!
—Never make any modifications or constructional alterations to the instrument and
use only original spare parts and optional equipment from Ohaus Corporation.
—Your Moisture Analyzer is a rugged, precision instrument –but you should still
treat it carefully; it will then provide you with many years of trouble-free operation.
—Please comply with all notes and instructions in these operating instructions.
Keep the instructions in a safe place where they are immediately at hand if any
points are unclear.
APPLICATION DISCLAIMER:
—Moisture determination applications must be optimized and validated by the user
according to local regulations. Application specific data provided by Ohaus is
provided for reference purposes only. Ohaus waives all liability for applications
based on this data.

EN-4 MB35
2. Installation
This section contains unpacking and installation instructions for your new Moisture Analyzer .
2.1 Unpacking and Checking Equipment
Open the package and remove the instrument and the accessories. Check the completeness of the
delivery.
The following accessories are part of the standard equipment of your new Moisture Analyzer.
—1 Box, Aluminum sample pans
—1 Pan support
—1 Specimen sample (circular, absorbent cellulose disk)
—1 Draft shield element
—1 Heat shield
—1 Power cable
—1 Set of operating instructions
—1 Warranty card
Remove packing material from the instrument. Check the instrument for transport damage. Immediately
inform your Ohaus dealer if you have complaints or parts are missing. Store all parts of the packaging.
This packaging guarantees the best possible protection for the transport of your instrument.
2.2 Selecting the Location
The Moisture Analyzer should always be used in an environment which is free from excessive air
currents, corrosives, vibration, and temperature or humidity extremes. These factors will affect displayed
weight readings.
DO NOT install the Moisture Analyzer next to:
•Open windows or doors or vents causing drafts or rapid temperature
changes.
•Near vibrating, rotating or reciprocating equipment.
2.3 Installing the Heat Shield, Draft Shield and Pan Support
Install the heat shield, draft shield and pan support as shown.
Turn the pan support until it engages In the locked position.
Draft Shield
Pan Support
Heat Shield

MB35 EN-5
2.4 Connecting to a Power Supply
Check to ensure the voltage identification label on the Moisture Analyzer matches
your local line voltage.
The halogen dryer unit is designed to operate at a specific line voltage (120 V ac or
240 V ac).
CAUTION:
Connection to line voltages that are above or below the rated voltage can cause
improper operation or damage to the unit.
Connect power cord as shown. The MB35 is operational when power is
applied. The display remains off until the On/Off button is pressed.
Allow the Moisture Analyzer to warm up for at least 30 minutes to stabilize when
turned on.
WARNING:
If the power cable supplied is not long enough, use only a proper 3-pin extension
cable with an equipment grounding connector.

EN-6 MB35
2.5 Operating Controls
The MB35 Moisture Analyzer controls are grouped as operating buttons and function buttons with three
modes of operation.
EDIT MODE –User is changing a
parameter, no test running.
RUN MODE –Unit is running a test.
RESULT MODE –Final result.
OPERATING BUTTONS
Turns display On or Off.
Press to enter ANALYZER SETUP screen. (Edit mode)
Print Test Result (if COM parameters are set and PRINT is on).
Accepts selection. (Edit mode) Sends Print command. (Run mode)
Performs Tare function. (Pressing during the test has no effect.)
FUNCTION BUTTONS
EDIT MODE
ONLY
100°10:00
CLEAR
PAN
PRESS
TARE
0.000g
*
Initial press of button highlights tempera-
ture numerals. Additional presses
increases temperature setting in 5 degree
increments.
EDIT MODE
ONLY
100°10:00
CLEAR
PAN
PRESS
TARE
0.000g
*
Initial press of button highlights shut-off
selection. Additional presses step through
options, AUTO or TIMED
(minutes/seconds).
EDIT MODE
ONLY
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
In a non-run mode, initial press of button
brings up the ANALYZER SETUP screen.

MB35 EN-7
3. Moisture Analyzer Setup
3.1 Language Setting
1. START
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
ANALYZER SETUP
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
LANGUAGE
2. SELECT
LANGUAGE
SELECT LANGUAGE
ENGLISH
LANGUAGE
SELECT LANGUAGE
ESPANOL
or
3. ACCEPT
LANGUAGE
CHANGE ALL TEXT
TO
ESPANOL
ARE YOU SURE NO
or
4. FINAL
LANGUAGE
ANALYZER WILL
BE RESET
10010:00
LIMPIE
PLATLLO
PULSE
TARE
0.000g
*
x6

EN-8 MB35
3.2Weight Calibration
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
WEIGHT CAL
PLACE 20G MASS
TO ABORT
PRESS STRT/STP KEY
TO ABORT:
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
TO CONTINUE:
WEIGHT CAL
REMOVE MASS
TO ABORT
PRESS STRT/STP KEY
WEIGHT CAL
PRESS TARE
CAL SUCCESSFUL
TO ABORT
PRESS STRT/STP KEY
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT

MB35 EN-9
3.3Temperature Calibration
Note: Temperature Calibration Kit is required.
ANALYZER SETUP
LOCK OUT
WEIGHT CAL
TEMP CAL
LANGUAGE
BEEPER
TIME-DATE
TEMP CAL
REMOVE PAN SUPPORT
ABORT CALIBRATION
/
TEMP CAL
INSERT CAL FIXTURE
CLOSE COVER
ABORT CALIBRATION
TEMP CAL
CALIBRATION READY
PRESS TARE/ACCEPT
ABORT CALIBRATION
TEMP CAL 100°C
CURRENT TEMP: ¾C
TM TO CAL POINT: 15:00 MIN
ADJ CAL READING: 100°C
ACCEPT NEW CAL
ABORT CALIBRATION
15
TEMP CAL 100°C
CURRENT TEMP: 100°C
TM TO CAL POINT: 15:00 MIN
ADJ CAL READING: 100°C
ACCEPT NEW CAL
ABORT CALIBRATION
Adjust to thermometer reading
/
TEMP CAL 100°C
CURRENT TEMP: 100°C
TM TO CAL POINT: 15:00 MIN
ADJ CAL READING: 104°C
ACCEPT NEW CAL
ABORT CALIBRATION
ABORT CALIBRATION
TEMP CAL 100°C
CURRENT TEMP: 100°C
TM TO CAL POINT: 15:00 MIN
ADJ CAL READING: 104°C
ACCEPT NEW CAL
Adjust to thermometer reading
/
TEMP CAL 160°C
ABORT CALIBRATION
CURRENT TEMP: 160°C
TM TO CAL POINT: 0:00 MIN
ADJ CAL READING: 163°C
ACCEPT NEW CAL
15
TEMP CAL 160°C
ABORT CALIBRATION
CURRENT TEMP: 160°C
TM TO CAL POINT: 0:00 MIN
ADJ CAL READING: 160°C
ACCEPT NEW CAL
TEMP CAL 160°C
ABORT CALIBRATION
CURRENT TEMP: 160°C
TM TO CAL POINT: 0:00 MIN
ADJ CAL READING: 163°C
ACCEPT NEW CAL
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
Open the cover, allow unit to cool, remove the calibration fixture,
replace the pan support and pan.

EN-10 MB35
3.4Time and Date Setting
1. TO START
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
2. SET FORMAT
TIME - DATE
MM/DD/YR
07/10/01
12HR
11:30 AM
FORMAT:
SET DATE:
TIME FMT:
SET TIME:
TIME - DATE
DD.MM.YR
10.07.01
12HR
11:30 AM
FORMAT:
SET DATE:
TIME FMT:
SET TIME:
or
3. Exit without saving Only when setting data.
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
4. SET DATE
TIME - DATE
MM/DD/YR
07/10/01
12HR
11:30 AM
FORMAT:
SET DATE:
TIME FMT:
SET TIME:
or
Repeat to complete date.
5. SET FMT
TIME - DATE
MM/DD/YR
07/10/01
12HR
11:30 AM
FORMAT:
SET DATE:
TIME FMT:
SET TIME:
or
Select 12HR or 24HR.
6. SET TIME
TIME - DATE
MM/DD/YR
07/10/01
12HR
11:30 AM
FORMAT:
SET DATE:
TIME FMT:
SET TIME:
or
Repeat for minutes and am/pm.
7. ACCEPT AND LEAVE
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
X2

MB35 EN-11
3.5 RS232 Settings
1. TO START
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
2. SET BAUD RATE
RS232
9600
NONE
8
1
NONE
BAUD RATE:
PARITY:
DATA BITS:
STOP BITS:
HANDSHAKE:
or
Default is 9600.
3. SET PARITY
RS232
9600
NONE
8
1
NONE
BAUD RATE:
PARITY:
DATA BITS:
STOP BITS:
HANDSHAKE:
or
Default is NONE.
4. SET DATA BITS
RS232
9600
NONE
8
1
NONE
BAUD RATE:
PARITY:
DATA BITS:
STOP BITS:
HANDSHAKE:
or
Default is 8.
5. SET STOP BITS
RS232
9600
NONE
8
1
NONE
BAUD RATE:
PARITY:
DATA BITS:
STOP BITS:
HANDSHAKE:
or
Default is 1.
6. SET HANDSHAKE
RS232
9600
NONE
8
1
NONE
BAUD RATE:
PARITY:
DATA BITS:
STOP BITS:
HANDSHAKE:
or
Default is NONE.
7. ACCEPT & LEAVE
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
X3

EN-12 MB35
3.6 Setting Print and GLP Printing On or Off
1. To Start:
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
2. Set Print:
PRINT
OFF
OFF
OFF
PRINT:
GLP:
PRINT INT:
or
On or Off
3. Set GLP:
PRINT
OFF
OFF
OFF
PRINT:
GLP:
PRINT INT:
or
On or Off
4. Set Print Interval:
PRINT
OFF
OFF
OFF
PRINT:
GLP:
PRINT INT:
or
Min/Sec
5. To Save:
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
100°10:00
CLEAR
PAN
PRESS
TARE
0.000g
*
Complete
Setup
X4

MB35 EN-13
3.7 Adjusting Display Contrast and Brightness
1. To Start:
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
ANALYZER SETUP
TIME-DATE
RS-232
PRINT
EXIT
LANGUAGE
DISPLAY
2. Set Contrast:
DISPLAY ADJUST
60
10
CONTRAST:
BRIGHT:
or
Adjust Contrast
3. Set Brightness:
DISPLAY ADJUST
60
10
CONTRAST:
BRIGHT:
or
Adjust Brightness
4. Accept & Leave:
ANALYZER SETUP
TIME-DATE
RS-232
PRINT
EXIT
LANGUAGE
DISPLAY
5. To Save:
ANALYZER SETUP
WEIGHT CAL
TEMP CAL
TIME-DATE
RS-232
PRINT
EXIT
X7
X2

EN-14 MB35
4. Operating Your Moisture Analyzer
Once the Moisture Analyzer parameters have been set, moisture determinations can be made very
simply. There are three simple steps to perform:
1. Setting the drying temperature, 2. Setting the drying time, and 3. Preparing the sample.
4.1 Setting the Drying Temperature:
100°10:00
CLEAR
PAN
PRESS
TARE
0.000g
*
or
Set temperature from 50°C to 160°C.
4.2 Setting the Drying Time:
SELECT AUTO OR TIMED
10:00
SAMPLE
<.500G
0.000g
*
100°
or
Select timed or auto.
FLASHING TIME
TIMED DRYING
7:30
SAMPL
E
<.500G
0.000g
*
100°
or
Change time when flashing.
4.3 Sample Preparation
Please keep in mind the importance of preparing your sample, the distribution of the sample on the
weighing pan, the type of sample and the temperature range. Remember, the greater the number of
uniform samples tested, the greater the accuracy of the results. Careful sample preparation is important
for best results. At a minimum, follow these steps.
Results of substances which form crusts (e.g. glucose syrup) or pasty substances (e.g. butter) can be
considerably improved by mixing with quartz sand.
For pasty, fat containing and melting substances, use of a glass fiber filter is advantageous to increase
the surface area of the sample.
The use of a glass fiber filter can be useful for temperature-sensitive and skin forming substances. In
this case, the sample to be dried is covered by the filter and thus receives a ―new surface‖.

MB35 EN-15
4.3 Sample Preparation (Cont).
Clear the pan, press the Tare button.
Correct amount
Homogenously distributed
Correct sample distribution
Distribution
Piling
Excessive amount
Incorrect sample distribution
4.4 Running the Test
05:00
SAMPLE
<.500G
0.000g
*
130°
Initial display.
05:00
CLOSE
COVER
0.000g
*
130°
Place sample on pan.
(See above for correct sample distribution)
05:00
TEST
READY
PRESS
START
1.300g
*
130°
Start process.
05:00
29.60%
* 0.915G
130°
130°C
02:45
Sample during drying process.
05:00
29.60%
* 0.915G
100°
05:00
TEST
OVER...
Test end.

EN-16 MB35
4.5 RS232 Command Table
Output Formats
Data output can be initiated in one of three ways:
1. By pressing the Print button;
2. Using the Print Interval feature;
3. Sending a print command (―P‖) from a computer.
RS232 Commands
All communication is accomplished using standard ASCII format. Only the characters shown in the
following table are acknowledged by the Moisture Analyzer. Invalid command response "ES" error
indicates the Moisture Analyzer has not recognized the command. Commands sent to the Moisture
Analyzer must be terminated with a Line Feed or carriage return-line line feed (CRLF). Data output by the
Moisture Analyzer is always terminated with a carriage return-line feed (CRLF).
RS232 COMMAND TABLE
Command
Character
Description
V
Print SR Version
ESC V
Print S/N (unit ID)
?
Print current mode.
TIME
Print Current Time
DATE
Print Current Date
P
Print elapsed time and present reading
RS232 Pin out
The following table illustrates the pin-out connections on the RS232 connector.
1
N/C
2
<–
Date Out (TXD)
3
–>
Date Out (RXD)
4&6
Pins 4 and 6 are connected together.
5
Ground
7
–>
Clear to send (CTS)
8
<–
Request to send (RTS)
9
N/C

MB35 EN-17
5. Care and Maintenance
In this section, you will learn how to keep your Moisture Analyzer in good condition and how to replace
expendable parts.
5.1 Cleaning Interior/Exterior Components
To continue to obtain precise measurements, it is advisable to clean the interior components at regular
intervals. Please note the following instructions for cleaning your instrument.
Disconnect the instrument from the power supply before cleaning.
Cleaning Temperature Sensor and Protective Glass
Check the protective glass and the temperature sensor for debris
which could impede the operation. If the glass appears dirty,
clean the surface facing the compartment using a commercial
glass cleaner. If the sensor is dirty, clean using a mild cleaning
agent.
Removing Glass for Cleaning
If the inside of the glass is dirty, open the cover and remove the
four cover screws as shown.
Remove the glass holder and glass from the cover and clean with
a commercial glass cleaner on both sides.
Reassemble after cleaning.

EN-18 MB35
5.2 Replacing Power Line Fuse
If the instrument display fails to light after switching it on, check the power outlet first. If power is
available, and the instrument fails to operate, the power fuse may be open (blown).
Disconnect the instrument from the power supply before cleaning.
Using a screwdriver, turn the fuse holder to the left
(counterclockwise) and remove the fuse.
Check the condition of the fuse. Replace blown fuse by those of the
same type with the same rated value (5 x 20 mm, T6.3H 250 V).
NOTE: If the fuse is good and power is available at the outlet, the
cord or instrument may be defective. Try a new cord. If this does
not work, the instrument should be sent back for servicing.
The use of a fuse of a different type or with a different value, or
bridging or shunting the fuse is not allowed and can possibly
cause a hazard to your safety and lead to instrument damage!
5.3 Resetting the dryer thermal overload device
NOTE: This procedure only applies to units that contain an access
hole to the thermal overload protection device. See illustrations.
If the dryer has overheated and the thermal overload protection
device has responded, it can be reset as follows:
Disconnect the unit from the power supply.
Lift the top cover straight up and remove the access hole cover
from the access hole using a flat head screwdriver.
Reset the overload device with your finger.
Replace the access hole cover and reconnect unit to power supply.