SBS SBS-2500 User manual

Digital Hydrometer
SBS-2500 INSTRUCTION
MANUAL
Storage Battery Systems LLC • Instruction Manual for SBS-2500 Digital Hydrometer • Rev. 09-15
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

Table of Contents
1 Introduction ............................................................................................................................................................. 4
2 Safety Measures ....................................................................................................................................................... 4
3 Description of the Instrument ................................................................................................................................. 5
3.1 SBS-2500 .................................................................................................................................................................. 5
3.2 Display ...................................................................................................................................................................... 5
3.3 Keys .......................................................................................................................................................................... 5
4 Tutorial ..................................................................................................................................................................... 7
4.1 Inserting batteries .................................................................................................................................................... 7
4.2 Configuration ........................................................................................................................................................... 7
4.3 Test measurement ................................................................................................................................................... 8
4.4 Adjustment ............................................................................................................................................................... 8
4.5 Cleaning .................................................................................................................................................................... 8
4.6 Switching off and on ................................................................................................................................................ 8
5 Menu ........................................................................................................................................................................ 9
5.1 Using the menu ........................................................................................................................................................ 9
5.2 Measurement Unit (Measure Unit) ....................................................................................................................... 10
5.3 Temperature Unit (Temp. Unit) ............................................................................................................................. 12
5.4 Measure Mode ....................................................................................................................................................... 12
5.5 Adjustment Mode (Calib. Mode) ........................................................................................................................... 12
5.6 Interface ................................................................................................................................................................. 12
5.7 Beep . ...................................................................................................................................................................... 12
5.8 Background Lighting and LCD-Contrast (LCD) ....................................................................................................... 13
5.9 Automatic Switch-off (Power) ............................................................................................................................... 13
5.10 Software Version (Version No.) ............................................................................................................................. 13
5.11 Date & Time ........................................................................................................................................................... 13
5.12 Identification .......................................................................................................................................................... 13
6 Measurement ......................................................................................................................................................... 13
6.1 Procedure for proper measurement ..................................................................................................................... 13
6.2 Filling the measuring cell using the built-in sample pump ................................................................................... 14
6.3 Filling the measuring cell using an external syringe ............................................................................................. 14
6.4 Measuring .............................................................................................................................................................. 15
6.5 Saving the results ................................................................................................................................................... 15
6.6 Displaying and marking saved results ................................................................................................................... 15
6.7 Printing and transferring results ............................................................................................................................ 16
6.8 Deleting results ...................................................................................................................................................... 17
7 Adjustment (cal) ..................................................................................................................................................... 17
7.1 Adjusting the measuring cell with water ............................................................................................................... 17
7.2 Adjusting the measuring cell with a density standard .......................................................................................... 18
7.3 Adjusting the measuring cell with air .................................................................................................................... 18
7.4 Adjusting the temperature display ........................................................................................................................ 19
8 Interface ................................................................................................................................................................. 20
8.1 IR printer settings .................................................................................................................................................. 20
8.2 Data transfer to PC ................................................................................................................................................ 20
8.3 Data format ............................................................................................................................................................ 21
9 Error Messages and Malfunctions ......................................................................................................................... 22
10 Cleaning and Maintenance .................................................................................................................................... 23
10.1 Cleaning the measuring cell ................................................................................................................................... 23
10.2 Cleaning the housing ..............................................................................................................................................23
10.3 Replacing the sample tube .................................................................................................................................... 23
10.4 Replacing the sample pump .................................................................................................................................. 23
11 Standard equipment .............................................................................................................................................. 24
12 Technical data ........................................................................................................................................................ 25
13 Appendices ............................................................................................................................................................. 26

1. Introduction to the SBS-2500
The SBS-2500 is a portable measuring instrument suited for determining the density of liquids. The instrument uses the oscillating body method.
To fill the measuring cell the built-in sample pump or a syringe may be used. The results are automatically calculated into one of the following
units: density, specific gravity, API degrees, Brix, % Alcohol, % H2SO4, Baumé, Plato, Proof or a user-defined unit. The value is then shown on the
backlit display.
For exact measurements, it is imperative to correct the temperature’s influence on the density. Depending on the selected unit the SBS-2500
carries out this result correction automatically. For this task, the instrument uses either internally-stored tables or one of the 10 temperature-
compensation coefficients entered by the user.
The results, along with the sample identification, temperature, temperature-coefficient, date and time can be saved. Together with the
instrument identification they can then, via the integrated infrared interface, be transferred to the computer or printed out on a printer.
2. Safety Measures
Measures for Your Protection and Operational Safety
Do not work in an explosion-hazardous environment! The instrument
housing is not gas tight. Otherwise, there is a risk of explosion from sparks
and/or risk of corrosion by gasses which can seep in.
•Always hold the end of the sample tube over a waste container!
There is a risk of injury when emptying corrosive substances.
•Leave the syringe in the sample intake after injecting a sample!
Otherwise, the sample will run out of the measuring cell.
1. Never press on the measuring cell window! This can influence the
oscillation characteristics of the measuring cell.
2. Do not clean the measuring cell with concentrated NaOH (caustic
soda) or HF (hydrogen fluoride)! Both substances chemically corrode
the measuring cell.
3. Use batteries of the specified type only. Otherwise, proper operation
cannot be guaranteed.
4. Do not submerge the housing in liquid! The instrument is only
resistant to splashed water.
5. Ensure that the following environmental conditions are met:
• nostrongvibrationspresent
• notindirectsunlight
• nohighhumiditypresent
• nocorrosivegassespresent
• temperaturebetween–20°Cand70°C
•no strong electrical or magnetic fields present

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SBS-2500 Manual 09-15-TI2500
3. Description of the Instrument
3.1 SBS-2500
1. Backlit Display
2. Keypad
3. Drain button
4. Sample pump
5. Cover of sample pump
6. Connector for syringe adapter
7. Fixing screw for sample tube
8. Sample tube
9. Measuring cell
10. Infrared interface
11. Lock button
12. Fill button
13. Battery compartment cover
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SBS-2500 Manual 09-15-TI2500
3.2 Display
1. Selected unit of measurement
2. Result
3. Sample identification (a…z or space)
4. Sample number, or error number if an error has occurred
5. Appears if “Stability” is set to “Auto”
6. Appears if “Memory” in is set to “Auto”
7. Appears if “Memory” out is set to “Auto”. If a printer or PC is connected, the data are transferred
automatically
8. Battery-power indicator
9. Temperature(°C/°F)
10. Appears if delete mode is activated
11. Mark for results
For the identification of invalid or incorrect results or for marking a sample change
∆Referencetemperature(fortheunits“Comp.Density”and“SG”only)

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SBS-2500 Manual 09-15-TI2500
3.3 Keys
Red symbols: Press key longer than 2 seconds.
Blue symbols: Press key briefly.
No. Symbol Short Key Press Long Key Press
1• Move marker to the left
• Mark saved results
• Delete saved results
2• Move marker upward
• Select sample number
(ascends)
• Switch between “Yes” and
“No” setting
• Select temperature-
compensationcoefficientα
3• Move marker to the right
• Display saved results
• Transfer one saved result
to a printer/PC
• Transfer a series of saved
results to a printer/PC
4• Move marker downward
• Select sample number
(descends)
• Switch between “Yes” and
“No” setting
• Call up adjustment mode
5esc Exit the menu Switch instrument on or off
6ok/meas. • Start measurement
• Confirm input
• Confirm data delete
• Confirm data transfer
• While pressing and holding
key 5: enter the menu
Note
Onlythearrowsymbolsareusedtorepresentkeys1–4inthefollowingoperationinstructions.

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SBS-2500 Manual 09-15-TI2500
4. Tutorial
4.1 Inserting Batteries
1. Open the battery compartment cover on the back of the SBS-2500.
2. Remove battery compartment.
3. Insert batteries into the battery compartment, observing correct polarity.
4. Insert battery compartment, ensuring that the contacts of the battery compartment face the instrument.
5. Close battery compartment cover.
6. The instrument switches on automatically and is immediately ready for operation.
7. With the backlighting switched off the battery lasts about 90 hours.
If nothing appears in the display, check the polarity of the batteries and battery compartment.
4.2 Configuration
Configuring the instrument for test measurement.
Entering the Menu
Press the keys “ok/meas.” and “esc” simultaneously.
The instrument switches to the “FUNCTION” menu, Measure Unit appears in reverse display (white on
black).
Selecting Setting
•Confirm Measure Unit by pressing the “ok/meas.” key.
•Press the key repeatedly until SG(t/t) is marked.
•Confirm SG(t/t) by pressing the “ok/meas.” key.
Setting Date and Time
•Use the key to switch to “Date & Time”.
•Confirm Date & Time with the “ok/meas.” key.
•To set the date, confirm Date with the “ok/meas.” key.
•Use the side arrows to select the number to change, and use the up and down arrows to change the value.
Confirm with “ok/meas”.
•Use the down arrow key to switch to “Time” and confirm with “ok/meas”. Set the time as described above.
Exiting the Menu
Press the “esc” key.
The instrument is configured for test measurement.
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SBS-2500 Manual 09-15-TI2500
4.3 Test Measurement
1. Push drain button (3) downward completely.
2. Ensure that the sample tube is located in the accompanying density standard or in distilled water.
3. Press the fill button (12) slowly to fill the measuring cell.
4. Ensure that no air bubbles are contained within the measuring cell.
5. Press the “ok/meas.” key.
The instrument automatically executes a measurement and the result appears in reverse display.
Theresultforwatermustbe1.000intheselectedmeasurementuntilSG(t/t).
If the deviation is < 0.0005
Adjustment is ok, the instrument is ready for measurement.
If the deviation is > 0.0005
Adjust instrument, see Chapter 4.4.
4.4 Adjustment
Initializing Adjustment
•Press and hold the key until CALIB (Water) appears on the display. The instrument adjusts
automatically (duration: approximately 1 minute).
•After adjustment is completed, the measured deviation from the theoretical value and Exe cute? (No)
appears.
•Press the  or key. Execute? (Yes) appears.
•Press the “ok/meas.” key to confirm.
The adjustment is confirmed.
4.5 Cleaning
The built-in sample pump or an external syringe can be used to fill the measuring cell with cleaning liquid.
1. Empty the measuring cell completely before cleaning. Press the drain button downward completely
2. Clean the measuring cell daily with a suitable cleaning liquid.
3. For very dirty measuring cells, let the inside of the cell soak in the cleaning liquid.
4. Repeat cleaning if necessary.
5. If the housing is soiled, clean with a cleaning tissue.
4.6 Switching Off and On
Switching off
Press and hold the “esc” key until the display is turned off. The instrument is now turned off.
Switching on
Press and hold the “esc” key until the display appears. The instrument is ready for operation.

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SBS-2500 Manual 09-15-TI2500
5. Menu
The menu of the SBS-2500 offers the following functions:
Measurement Unit (Measure Unit) see Chapter 5.2
Temperature Unit (Temp. Unit) see Chapter 5.3
Measure Mode see Chapter 5.4
Adjust Mode (Calib. Mode) see Chapter 5.5
Interface see Chapter 5.6
Beep see Chapter 5.7
Backlighting and LCD-Contrast (LCD) see Chapter 5.8
Automatic Switch-off (Power) see Chapter 5.9
Software Version (Version No.) see Chapter 5.10
Date & Time see Chapter 5.11
Identification see Chapter 5.12
5.1 Using the Menu
Entering the menu
Press the keys “ok/meas.” and “esc” simultaneously.
The instrument switches to the menu
Selecting Functions
•Press and  keys repeatedly until the desired function is marked.
•Press the “ok/meas.” key to activated the marked function.
The instrument switches to the corresponding submenu or activates the desired function.
Numerical Input
•Select decimal places with the  and keys.
•Change value with the and keys.
•Press the “ok/meas.” key to confirm the value.
Exiting the Menu
Press the “esc” key.

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SBS-2500 Manual 09-15-TI2500
5.2 Measurement Unit (Measure Unit)
The following unites are available for selection:
Density
Available density units:
g/cm3
lb/gal (US) 1 g/cm3= 8.3454 lb/gal
lb/gal (IP) 1 g/cm3= 10.0224 lb/gal
Comp. Density (Temperature-compensated density)
Density measurement in g/cm3at a reference temperature.
All results at the same reference temperature (T0,e.g.20°C),regardlessofthemeasuringtemperature(T).
Compensated density = measured density •(1+α•(T - T0))
10 temperature-compensation coefficients can be saved.
The following input is required:
Comp. No. Number of the temperature-compensation coefficient (0...9)
Comp. Temp. Reference temperature (T0)
αx1000 Temperature-compensationcoefficient
Fortypicaltemperature-compensationcoefficients,seeChapter13.2;calculationofα,seepage11.
SG (t/t) (specific gravity)
SG(t/t)= Density of the sample at T
Density of water at T
T Measuring temperatures
SG (specific gravity, temperature-compensated)
SG= Density of the sample, temperature-compensated for T0
Density of water at T1
10 temperature-compensation coefficients can be saved.
The following input is required:
Comp. No. Number of the temperature-compensation coefficient (0...9)
Comp. T. T0/T1°C(entertemperaturesT0and T1)
αx1000 Temperature-compensationcoefficient
Fortypicaltemperature-compensationcoefficients,seeChapter13.2;calculationofα,seepage11.
API (American Petroleum Institute)
Themeasuredvaluesareconvertedtoareferencetemperatureof15°Cor60°F.ThisconversionisbasedonAPItables:
product group A: crude oil; product group B: fuel, petroleum products; product group D: lubricants. The result can be
expressed as density (e.g. APIA (Density)), or directly in API degrees (e.g. APIA (degrees)).
Brix (Sucrose)
Measurementofthesucroseconcentration,percentweightat20°C.
Alcohol (Ethanol)
Measurementoftheethanolconcentrationinwater,percentweight(Wt%)orpercentvolume(Vol%)at20°C.
H2SO4 (Sulfuric acid concentration)
Measurementofthesulfuricacidconcentration,percentweightat20°C.
Baume (°Baumé scale)
Measurementin°Baumé(heavyBauméford>1,lightBauméford<1)calculatedtoareferencetemperature.
10 temperature-compensation coefficients can be saved. Input of temperature-compensation coefficients via Comp.
Density.Fortypicaltemperature-compensationcoefficients,seeChapter13.2;calculationofα,seepage1.
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SBS-2500 Manual 09-15-TI2500
Plato
Measurementof°Platoat20°C.
Proof
MeasurementoftheProofdegreeat60°F.
The Proof degree is a unit used to determine the ethanol content.
Proof (US): Measurement with US unit (100v/v% = 200 US Proof).
Proof (IP): Measurement with IP unit (100v/v% = 175 British Proof).
Conc. (Concentrations)
Measurement of the concentration via the input of the desired concentration-conversion formula y = a + bx at a
reference temperature.
y = concentration in % or without units
a, b = sample-dependent coefficients
x = measured density.
The following units are possible for x:
•1/compensated density -1
•compensated density -1
•compensated density
•1/specific gravity -1
•specific gravity -1
•specific gravity
Calculation of the temperature-compensation coefficient α
Measure density of the sample:
•at a temperature (T1) above the normal measuring temperature,
•at a temperature (T2) below the normal measuring temperature.
Calculateαaccordingtotheformula:
density at T2 = density at T1 •(1+α•(T1- T2))
or
α=(density at T2 - 1 )/ T1- T2
density at T1
Entervalueαx1000intotheinstrument.
Note
The temperatures T1and T2havetobeenteredintotheselectedunit(°Cor°F,seechapter5.3).
Example
(measured)densityat26°C(T1) 0.7844 g/cm3
(measured)densityat15°C(T2) 0.7937 g/cm3
α=(0.7937 - 1 )/ 26 - 15
0.7844
α=(1.011856-1)/11=0.011856/11=0.001078
αx1000=1.078; enter this value into the instrument.
10 temperature-compensation coefficients can be saved. Input of temperature-compensation coefficients via
Comp. Density. For typical temperature-compensation coefficients, see Chapter 13.2.

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SBS-2500 Manual 09-15-TI2500
5.3 Temperature Unit (Temp. Unit)
Datain°Cor°F(selectable).
5.4 Measure Mode
Configuration of sample identification, stability mode and method of data storage.
Sample Name Sample identification.
A letter (a...z or space) can be set for the identification of samples.
Stability Stability control.
Auto The result is accepted automatically when the display is stable.
Manu Result accepted by pressing the “ok/meas.” key.
Mode Method of data storage.
Labo By pressing the “ok/meas.” key the result is saved and transferred (printer, PC).
Field By pressing the “ok/meas.” key the result is saved.
Custom User-defined setting.
Memory in Save results.
Auto Save result automatically.
Manu Result saved by pressing the “ok/meas.” key
Memory out Transfer result to PC or printer.
Auto Transfer result automatically.
Manu Transfer result by pressing the key.
5.5 Adjustment Mode (Calib. Mode)
Off Adjust measuring cell with accompanying density standard or distilled water.
On Adjust measuring cell with desired density standard.
The following input is required:
Density Density of the density standard (g/cm3) at the reference temperature
Temp Reference temperature
αx1000 Temperature-compensationcoefficientofthedensitystandard•1000
5.6 Interface
PRN Printer interface
Data transfer to printer
Printer with serial interface and connected infrared adapter. Results are formatted for output to a
printer.
Transfer rate (baud rate), parity and stop and data bits must be configured according to the
peripheral device.
THE FOLLOWING SETTINGS ARE REQUIRED FOR THE METTLER TOLEDO LC-P45 PRINTER:
Baud rate 9600
Parity none
Stop bits 1
Data bits 8
RS Serial interface. The Excel macro “PortableCapt” for data transfer to the computer via the infrared
adapter is located on the CD.
IrDA Data transfer to the PC with the integrated IrDA interface in accordance with protocol 1.20
5.7 Beep
Off Beep off.
On Beep on.

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SBS-2500 Manual 09-15-TI2500
5.8 Background Lighting and LCD-Contract (LCD)
Backlighting
The backlighting is turned off automatically 5 seconds after the last time a key has been pressed (Auto off), or it
is always off (Always off).
Contrast
Display contrast is adjustable to one of 9 levels with the keys.
5.9 Automatic Switch-off (Power)
Off Automatic switch-off is off. The instrument must be switched off manually.
On The instrument switches off automatically if not operated for 10 minutes.
5.10 Software Version (Version No.)
The software version is displayed.
5.11 Date & Time
The settings for date and time can be edited here. The date is displayed in the format year/month/day (e.g.
2003/03/04 for March 4, 2003). Both date and time are included in the data transfer to a printer or computer.
5.12 Identification
An identification consisting of 10 letters and numbers (instrument name, user, etc.) may be entered here. This
identification will be included in the data transfer to a printer or computer.
6. Measurement (meas)
6.1 Procedure for Proper Measurement
•Test the instrument for accuracy with the accompanying density standard or distilled water before beginning
any measurements (See Chapter 4.3).
•Ensure that the measuring cell is clean before each measurement. Insufficient cleaning leads to remaining
residue in the measuring cell and, therefore, incorrect results.
•Check the sample for chemical resistance of the instrument materials.
Sample tube: PTFE (polytetrafluorethylene)
Measuring cell: Borosilicate glass
Measuring cell holder: PPS (polyphenylene sulphide)
Sample pump: PP (polypropylene)
Ensure that the samples to be measured:
•Are liquid enough to be sucked up or injected;
•Can be dissolved with a solvent suitable for cleaning the measuring cell;
•Are homogeneous (no emulsions or suspended particles, no air bubbles);
•Have reached ambient temperature in the measuring cell.
Forsampleswhichare20°Ccolderthantheambienttemperature,heatthesamplebeforebeginningthesampling
procedure.
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SBS-2500 Manual 09-15-TI2500
Note
The unit display flashes when the difference in temperature between the sample and the ambient air is greater
than±5°C
Forsamplesofhighviscosity(>2000mPa•s):
•Use an external syringe to fill the measuring cell.
6.2 Filling the Measuring Cell Using the Built-In Sample Pump
•Ensure that the sample tube is in the sample.
•Press the fill button (12) slowly to fill the measuring cell.
•Ensure that there are no air bubbles in the measuring cell.
6.3 Filling the Measuring Cell Using an External Syringe
•Press the drain button (3).
•Slide up the lock button (11).
•Remove the screw stopper (6) with a coin.
•Screw in the adapter for the external syringe.
•Hold the sample tube over a waste container.
•Slowly inject the sample into the measuring cell.
•Ensure that there are no air bubbles in the measuring cell.
•Do not remove the syringe while measuring.

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SBS-2500 Manual 09-15-TI2500
6.4 Measuring
The procedure is dependent upon the settings in the menu, see Chapter 5.4.
The symbol appears in the display: Measuring with automatic stability control
•Press the “ok/meas.” key to start measuring.
The symbol blinks during measurement. The result appears in reverse display.
The symbol does not appear on the display: Measuring with manual stability control
The instrument measures continuously.
•Wait until the displayed value stabilizes.
•If the result is to be saved: Press the “ok/meas.” key. The result appears in reverse display.
Measuring with Temperature-Compensation Coefficients (α)
(Comp. Density, SG, Conc. or Baume on the display)
•Press the key until a previously-saved temperature-compensation coefficient appears in the display,
e.g. α 1 = 0.1 3 2 .
•Select the desired coefficient using the and keys.
•Confirm the selected coefficient with the “ok/meas.”key.
•Measure using either automatic or manual stability control.
Emptying the Measuring Cell
•Hold the sample tube over a waste container.
•Press drain button (3) downward slowly and move it up again with the fill button (12).
6.5 Saving the Results
The instrument can save up to 1100 results internally. Each time a result is saved, the number of internally-stored
values increases by one.
The procedure for saving the results is dependent upon the settings in the menu (See Chapter 5.4).
The symbol appears in the display: Saving all results automatically
The instrument saves all results automatically.
The symbol does not appear in the display: Saving selected results manually
Save the result:
•Press the “ok/meas.” key.
Do not save the result:
•Press the “esc” key.
6.6 Displaying and Marking Saved Results
Displaying Saved Results
•Press the key.
The sample number flashes and the symbol appears.
•Scroll through the saved results using the and keys.
Marking Results
For the identification of invalid or incorrect results or for marking a sample change.
•Select the desired sample number using the and keys.
•Press the “ok/meas.” key.
The selected sample number is marked with an asterisk.

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SBS-2500 Manual 09-15-TI2500
Note
The marking is removed if the sample has already been marked.
6.7 Printing and Transferring Results
Conditions
•The interface and peripheral device are configured properly, see Chapter 5.6 and Chapter 8.
•For PRN and RS interfaces, the infrared adapter must be connected to the printer/PC.
The procedure for printing and transferring results is dependent upon the settings in the menu (See Chapter 5.4).
Important
To transfer or print results, hold the instrument in the direction of the infrared adapter at a maximum distance of
approx. 20 cm.
The symbol appears in the display: Printing or transferring results automatically
Every displayed result is transferred automatically.
The symbol does not appear in the display: Printing or transferring selected results manually
•Press the key.
•Select desired result with the or key.
•Press the “ok/meas.” key to transfer/print the result.
The symbol flashes and the result is transferred.
Printing and Transferring Results of a Series of Samples Manually
•Press and hold the key until Memory out, Execute? (All)appears in the display.
•Press the or key.
Execute? (Range)appears.
•Press the “ok/meas.” key to confirm.
•Enter the desired series of samples (from ... to ...) using the arrow keys.
To transfer the series of samples:
•Press the “ok/meas.” key.
The sample series (from ... to ...) is confirmed. The symbol flashes and the results of the selected series of
samples are transferred.
To Print or Transfer All Results Manually
•Press and hold the key until Memory out, Execute? (All)appears in the display.
•Press the “ok/meas.” key.
The symbol in the display flashes and all results are transferred.
After a successful transfer, the user is asked whether he/she would like to delete the transferred results:
Memory All Clear Exe cute? (No).
Leaving Transferred Results Intact
•Confirm Memory All Clear Execute? (No)by pressing the “ok/meas.” button.
Deleting Transferred Results
•Press the or key.
Execute? (Yes)appears.
•Press the “ok/meas.” key to confirm.
All results are deleted.
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SBS-2500 Manual 09-15-TI2500
6.8 Deleting Results
It is not possible to delete individual results with the SBS-2500.
Deleting all results
•Press and hold the key until Memory All Clear Exec ute? (No)appears in the display.
•Press the or key.
Execute? (Yes)appears.
•Press the “ok/meas.” key to confirm.
All results are deleted.
7. Adjustment (cal)
Before adjusting
•Carry out a test measurement before adjusting the measuring cell (See Chap. 4.3).
Test measurement result < 0.9995 or > 1.0005
•Check if the measuring cell is dirty, clean if necessary and repeat the test measurement.
Test measurement result once again < 0.9995 or > 1.0005
•Readjust instrument.
7.1 Adjusting the Measuring Cell with Water
Settings in the menu
•Calib. Mode: off
Adjusting
•Ensure that the measuring cell and sample tube are clean.
•Fill the clean measuring cell with the accompanying density standard or distilled water and ensure that no air
bubbles are allowed to enter.
•Press and hold the key until CALIB (Water) appears in the display.
The instrument adjusts automatically (duration: approx. 1 minute). After adjustment is completed, the measured
deviation from the theoretical value and Execute? (No)appears.
Measured Deviation <0.001
Press the or key.
Execute? (Yes)appears.
- Press the “ok/meas.” key to confirm.
The adjustment is confirmed.
Measured deviation ≥ 0.001
•Check whether the measuring cell is dirty and if there are air bubbles.
Measuring cell is clean and contains no air bubbles:
•Press the or key.
Execute? (Yes)appears.
•Press the “ok/meas.” key.
Measuring cell is dirty and/or contains air bubbles:
•Execute? (No)is confirmed by pressing the “ok/meas.” button.
•Clean the cell if necessary and readjust.

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7.2 Adjusting the Measuring Cell with a Density Standard
If a different density range is to be used, the measuring cell can be adjusted using a density standard of your choice
(e.g. toluene from the NIST, National Institute of Standards and Technology) instead of distilled water.
Setting in the Menu
•Calib. Mode: On
•Enter the following density standard values into the menu:
Density Density of the density standard (g/cm3) at the reference temperature
Temp Reference temperature
αx1000 Temperature-compensationcoefficientofthedensitystandard•1000
Adjusting
•Ensure that the measuring cell and sample tube are clean.
•Fill the clean measuring cell with the density standard (e.g. Toluene) ensuring that no bubbles are allowed to
enter.
•Press and hold the up and down keys simultaneously until CALIB (STD) appears in the display.
The instrument adjusts automatically (duration: approx. 1 minute). After adjustment is completed, the measured
deviation from the theoretical value and Execute? (No)appears.
Measured Deviation <0.001
Press the or key.
Execute? (Yes)appears.
- Press the “ok/meas.” key to confirm.
The adjustment is confirmed.
Measured deviation ≥ 0.001
•Check whether the measuring cell is dirty and if there are air bubbles.
Measuring cell is clean and contains no air bubbles:
•Press the or key.
Execute? (Yes)appears.
•Press the “ok/meas.” key.
Measuring cell is dirty and/or contains air bubbles:
•Execute? (No)is confirmed by pressing the “ok/meas.” button.
•Clean the cell if necessary and readjust.
7.3 Adjusting the Measuring Cell with Air
The SBS-2500 measures with the specified accuracy if the measuring cell is correctly adjusted with the
accompanying density standard or distilled water.
Additional adjustment with air is generally not necessary, but is recommended when:
•The measuring cell is replaced,
•Thedisplayeddensityofairis<0.0007g/cm3or>0.0015g/cm3.

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Setting in the Menu
Calib. Mode: Off.
Preparing the Measuring Cell
•Clean the measuring cell with a suitable solvent and rinse with ethanol.
•Hold the sample tube over a waste container.
•Connect a tube from the connection of the external syringe to an air pump (volume flow 1…2 l/min) connected
to dry tube filled with 5…10 g silica gel.
•Dry measuring cell for approx. 5…10 min.
•Wait approx. 30 min. until the measuring cell has reached the ambient temperature.
Adjusting
•Press the and keys simultaneously.
CA LIB (Air) appears in the display. The instrument adjusts the measuring cell automatically.
Adjustment is complete when CALIB (Air) disappears (after approx. 2 min.).
•Adjust measuring cell with water or a density standard of your choice.
7.4 Adjusting the Temperature Display
Adjustment of the temperature display is generally not necessary, as the SBS-2500 was adjusted at the factory
before shipment.
If the displayed temperature deviates from the actual temperature, carry out the following steps for adjustment:
•Check settings in the Measure Mode menu.
Stability: Manu
Memory in: Manu
•Switch instrument off.
•Set instrument aside for approx. one hour at a constant temperature.
•Switch instrument on.
•Press the “ok/meas.” key briefly; the display appears in reverse.
•Read temperature on the instrument and from an external thermometer.
•Determine and log the difference between the actual temperature (external thermometer) and the
temperature displayed on the instrument.
•Press the and keys simultaneously.
CA LIB (°C) or C ALIB (°F) (depending on the selected temperature unit) appears, and the unit flashes.
•Enter the logged temperature difference (with sign) using the arrow keys.
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•Press the “ok/meas.” key.
The temperature display is adjusted.
Example
Displayedvalueoninstrument: 21.7°C
Actualtemperature: 21.3°C
Difference:  21.3°C–21.7°C=–0.4°C
Value to be entered: –0.4 (°C)
8. Interface
Using the infrared interface of the SBS-2500, the stored measurements together with the sample identification, the
measurement unit, the temperature, the temperature compensation coefficient, the instrument identification, date
and time can be printed out with a printer or transferred to a PC.
An infrared adapter or a PC/printer with an IrDA interface is required.
Important
Data transfer is only possible when:
• Thereisvisualcontactbetweentheinfraredadapterandtheinfraredinterface;
• ThedistancebetweentheSBS-2500andtheinfraredadapterisnomorethan20cm.
8.1 IR Printer Settings
Configure the infrared interface of the SBS-2500 as described in Chapter 5.6.
•Connect infrared adapter to printer.
•Switch printer on.
•Press the menu button on the printer.
•Set the following serial interface parameters, see the operating instructions for the printer:
Baud rate: 9600
Parity: None
Stop bits: 1
Data bits: 8
8.2 Data Transfer to PC
•Configure the infrared interface of the SBS-2500 as follows (Interface, See Chapter 5.6):
Interface: RS
Baud rate: 9600
Parity: None
Stop Bits: 1
Data Bits: 8
•Connect the infrared adapter to an available serial interface (COM1, COM2,…) on the PC.
•Insert the accompanying CD-ROM in to the CD drive of the PC.
•Install the PortableCapt program (Excel macro).
•Start the PortableCapt program on the PC.
•In the Excel macro: select the serial interface (COM1, COM2, …) to which the infrared adapter is connected.
•For further procedures, see Chapter 6.7.