ScienTECH CS750 User manual

PN 12859 The information contained herein is proprietary to Scientech Inc.1
(CS750)
Operating
Manual
Thank you for choosing a Scientech Cabus Balance. Scientech, an ISO9001 registered company, and its
employees are pleased to provide you with a balance designed and manufactured for years of reliable
service and proudly made in the U.S.A. Please read this manual completely before using your balance.
This information will enable you to fully understand how to set up and operate your balance. The balance
is intended to be used only in the manner outlined in this manual. Operation not within specifications for
the product may cause product damage.

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Table of Contents:
1Good Measurement Practices..................................................................................................................................... 3
1.1 Equipment.......................................................................................................................................................... 3
1.2 Environment....................................................................................................................................................... 3
1.3 Operator............................................................................................................................................................. 4
2Unpacking and Setup .................................................................................................................................................. 4
2.1 Electrical Power Connection............................................................................................................................... 5
2.2Power Switches .................................................................................................................................................. 6
2.2.1 Balance Module Power Switch ....................................................................................................................... 6
2.2.2 Control Module Power Switch........................................................................................................................ 6
2.3 Control Module Startup...................................................................................................................................... 6
2.3.1 Control Module Startup When Control Module Battery Low......................................................................... 7
2.3.2 Control Module Startup After Initial Setup..................................................................................................... 9
3Home Screen “Main Menu” Features ....................................................................................................................... 12
3.1 Home Icon ........................................................................................................................................................ 13
3.2 Zero/Tare Banner Area..................................................................................................................................... 13
3.3 Weight value display ........................................................................................................................................ 13
3.4 Units of Measure .............................................................................................................................................. 13
3.5 OK Icon ............................................................................................................................................................. 14
3.6 Thermometer Icon ........................................................................................................................................... 14
3.7 Calibration Icon ................................................................................................................................................ 15
3.8 Settings Icon ..................................................................................................................................................... 19
4Settings Submenu’s................................................................................................................................................... 20
4.1 Level the Balance.............................................................................................................................................. 20
4.2 Precision Capabilities........................................................................................................................................ 20
4.3 Stability Indicator.............................................................................................................................................. 21
4.4 History .............................................................................................................................................................. 22
4.5 Date/Time......................................................................................................................................................... 23
4.6 About................................................................................................................................................................ 24
5Troubleshooting Guide:............................................................................................................................................. 30
6Limited Warranty: ..................................................................................................................................................... 31
7Returned Goods Procedure:...................................................................................................................................... 31
8Disposal of Electronic Equipment ............................................................................................................................. 32

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1Good Measurement Practices
There are numerous steps that one can take to improve the quality of a mass measurement system. However, they usually
fall within three main categories: the equipment, the environment, and the operator. If even one of these areas is neglected,
it can have a dramatic negative impact on your results. Although these suggestions are not meant to be all encompassing
or all-inclusive, the improvements that can be made following these simple guidelines can significantly improve
measurement results.
1.1 Equipment
1. Select weights that have a tolerance that is one third or better than the accuracy you require for your application.
This way the error of the weight will not dramatically impact the quality of your measurements.
2. The equipment must be of sufficient readability to calibrate or measure the weight or sample under test.
3. The balance should be placed on a stable platform free from the effects of vibration. The best setup is to place the
balance module onto a table constructed of marble or granite.
4. Never use a balance or scale as soon as it is powered on (plugged in). The internal electronic components need to
stabilize and “warm up” for at least 5 minutes once the equipment has been powered on. When the Cabus balance
is first setup or moved to a different location, allow for at least 30 minutes once the equipment has been powered
on. Scientech recommends that you leave this instrument plugged in twenty-four hours a day, seven days a week.
5. Never use a balance that has been idle for several hours without first "exercising it" and calibrating it. A balance is
exercised by lightly tapping the weighing pan 3 to 4 times. After exercising, the balance should be calibrated. If
these two techniques are consistently employed, a noticeable improvement will result in both linearity and stability
of the measurement.
6. When weights are not in use, store them in the case in which they were supplied. If the weights were not supplied
with a case, either purchase a case or use a clean container to protect the surfaces. This will keep airborne particles
from getting on your weights between uses. Weights should be in thermal equilibrium with the balance so store
weights near your balance.
1.2 Environment
The environment in which your balance is used is very important. Air currents, large temperature fluctuations (e.g., fans,
air conditioning), vibrations, influences the performance of high precision balances. Therefore, place your balance on a
solid, sturdy surface that is free of air currents, vibration and not in direct sunlight. The surface should not be magnetic and
should be located away from doors, windows, heaters, air conditioners and fans.
1. The more stable your environment, the better your measurement results. Changes in temperature, pressure, and
humidity affect balance performance and weight stability. Ideal room conditions are 20oC with a relative
humidity between 45% and 60%. Fluctuations in temperature should not exceed 1º C per hour. Humidity
fluctuations should not exceed 10% per hour.
2. Balances should not be placed in close proximity to anything that shakes, vibrates, or stirs violently. Avoid placing
your equipment near shakers.
3. Do not place your balance and/or scale near anything that generates heat. Heat will cause the balance chamber to
warm and due to the effects of the thermal expansion introduce large errors into your measurement. Do not place
the balance directly in front of a window. Sunlight can penetrate the window, warm the balance chamber at
different rates during the day, and affect the quality of your work.
4. Avoid placing the balance near sources of drafts, extreme air currents, or near air-conditioning vents. These
positions can cause your readings to be unstable and can dramatically cool the balance chamber when the air-
conditioning system begins to run.
5. The measurement environment should be clean and free of excessive contaminants. Contaminants such as dirt
and grease can adversely affect the weight of an object.

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1.3 Operator
1. Never touch a weight with your bare hands. Oils and contaminants from your hand will be transferred to the weight
and introduce a significant error. It is recommended that all weights be manipulated with gloved hands or forceps.
The two types of gloves that are commonly used and accepted are either latex (powderless) or cotton. Avoid any
metal to metal contact when handling or storing weights. This will cause scratches that may introduce error. All
weight forceps and weightlifters should be either nonmetallic (plastic or wood) or if metal, covered with a soft
protective coating or material to avoid scratches.
2. Place the weight or sample near the center of the balance pan. A small offset from center can have a pronounced
effect and introduce undue variation.
3. Take special care not to breathe onto the weight or into the balance chamber. Back away from the instrument.
This will prevent moisture or any thermal transfer of heat from your breath or body to the balance, the weight, or
the sample.
4. Time your measurements. Consistent sample times will provide more consistent measurement.
2Unpacking and Setup
The balance module, power supply, control module, weighing pan, powder pan and draft shield are packed in a foam
support to protect them from shock during shipping and handling. Save and reuse all packing material for future damage-
free shipments. Remove the equipment and assemble using the following instructions.
Figure 1. Cabus Packing

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Figure 2. Cabus Balance
2.1 Electrical Power Connection
The balance module is supplied with a 100/240, 50/60 Hz automatic switching, remote power supply. This power supply
will work with most electrical outlets. However, before making any connections, verify that the power (VAC) requirement
shown on the remote power supply is compatible with the AC power outlet to which the balance will be connected. A
standard type A wall plug is provided to connect the power supply to an electrical outlet. However, depending on the region
of the world the balance will be used, other outlet wall adapters may be required. Please contact Scientech Inc if you
require a different wall plug for your electrical outlet.
Note: First plug the round power connector into the balance’s rear panel receptacle. Then, plug the power supply into a
grounded AC outlet.
Note: Do not alter or bypass the ground plug in any way. Doing so adversely affects the performance of the balance.
Note: Scientech recommends that the balance be always plugged into an electrical outlet. This ensures the balance is
always warmed up and ready for use.
The control module gets its electrical power from the balance module. The control module USB cable should first be
connected to the USB port on the balance module (see Figure 3).
The balance module may then be connected to the power supply and the power supply plug into an electrical outlet.
Balance
Module
Control
Module
Power
Switch
1 of 3
Leveling
Feet
Weighing
Pan
Draft
Shield
Powder
Pan
Power Switch
on back of
Module

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Figure 3. Control Module Power Switch & Balance Module Ports
2.2 Power Switches
Both the control module and balance module have on/off power switches.
2.2.1 Balance Module Power Switch
The balance module power switch is located in the upper left corner of the balance’s front panel. When the balance is off,
pressing the power switch will light the switch blue as shown in Figure 2.
2.2.2 Control Module Power Switch
The control module power switch is located on the back side of the control module as shown in Figure 3.
2.3 Control Module Startup
The control module employs a balance application running on an Android operating system.
The control module will not work with the balance module if the control module USB cable is not connected to the balance
module. The control module communicates with the balance module via the USB cable and not wirelessly. The control
module receives its power from the balance module. The balance module does not need to be turned on for the control
module to receive power.
The control module also has a battery and will turn on without the balance module if the battery has sufficient power. With
the Android operating system turned off, a fully charged control module battery will last about 7 days. The battery allows
for the control module to be disconnected for a short period of time so that the Section 2.3.1 does not need to be repeated
every time the control module is restarted.
The control module has a sleep mode. In sleep mode, the control module display, speaker, and other processes that are
not required to keep apps running are turned off. Sleep mode is important with your balance to prevent screen burn-in.
Screen burn-in or ghosting often occurs after letting a device display the same static image for a long time. Persistent images
or ghost images may show on the display and becomes visible at all times. The control module uses sleep mode to prevent
this from occurring.
Control Module
Power Switch
Control Module
Cable Connects to
Balance Module
Balance Module
USB connection
Balance Module
Power connection

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2.3.1 Control Module Startup When Control Module Battery Low
If the control module battery drops below 1% charge, the control module will display the no charge battery symbol, or the
power level graphic shown in Figure 4 with 0% battery power. In this condition, the Android operating system will not boot
up. This may occur after during shipping or if the Cabus balance is not set up soon after receiving the system.
or
Figure 4. Battery Low Signal
To charge the control module battery, the control module USB cable must be connected to the balance module with the
balance module connected to power and the balance module power turned on.
The following steps describe how to open the balance application beginning with the Android boot process.
1. To turn on the control module and launch the Android operating system, press and hold the control module switch
for 3 to 4seconds to boot up the Android operated control module. The Android operating system will require
about 30 seconds to complete the boot process. The Figure 5 Android sleep screen will appear at the end of the
Android boot process.
Figure 5. Android OS Sleep Screen
2. Once the Figure 5 screen appears swipe up on the display to open the Android home screen shown in Figure 6.
3. The Cabus Balance application may be opened by selecting the Scientech balance application from the Android
home screen.

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Figure 6. Android Home Screen
4. A USB configuration banner may appear as illustrated in Figure 7. If this banner opens, check the “Use by default
for this USB device and then select “OK”. This establishes the USB connection between the balance and control
module.
Figure 7 USB Configuration Setting
5. Once the Figure 6 Android home screen opens, the Scientech balance application may also be opened by swiping
up on the display to open the apps screen shown in Figure 8 and selecting the Scientech balance app.

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Figure 8. Android Screen Showing Application Menu
6. The balance home screen, shown in Figure 9 will open after a several seconds. Once open, within seconds the
control module will connect to the balance module and at that point, be operational.
7. In the lower right-hand corner of the Home screen there is a message “Starting Up”. This indicates the balance
needs to thermally stabilize or warm up before use. The “Starting Up” message will change to a thermometer icon
after the Cabus balance has thermally stabilized as explained in Section 1.1, bullet 4.
Figure 9. Balance Application Home Screen (main Menu)
To avoid repeating Section 2.3.1 steps, it is recommended that the control module remain connected to the balance module
so that it has power. Both modules were designed to remain powered on all the time.
2.3.2 Control Module Startup After Initial Setup
After initial Cabus balance setup described in Section 2.3.1, the Android boot process will no longer occur unless the control
module is disconnected from the balance module for more than 7 days or the balance module is no longer connected to

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power for more than 7 days, discharging the battery. These instructions apply to a control module that has not been
disconnected from power.
The display will turn off and go into a sleep mode after 30 minutes of inactivity as described in Section 2.3.
1. With the balance module powered on, if the control module display turns off (i.e., goes into sleep mode) pushing
the control module power switch will launch the Figure 10 Android sleep screen.
2. Swiping up on the display will directly open the balance home screen shown in Figure 11 within a second.
Do not hold the power switch for more than 1 second or an Android operating system banner will open with a choice of
“Power Off” or “Restart” as shown in Figure 12. Pushing the power switch a second time will exit this banner and put the
display in sleep mode.
If “Power Off” is selected, then the Android operating system will need to be rebooted This is accomplished by pressing the
control module power switch for 3-4 seconds. After 30 seconds the Figure 10 screen will appear. Swiping up on this screen
will return the display to the balance home screen. It will take about 20 seconds for the Figure 11 balance application to

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reload. If the Figure 7 USB configuration page appears, check the box and select OK.
Figure 12. Android Operating System Power Off
If “Restart” is selected from the Figure 12 banner option, the Android operating system will require about 30 seconds to
reboot to the Figure 10 Android screen. Swiping up on this screen will launch the balance application after another 10
seconds. If the Figure 7 USB configuration page appears, check the box and select OK.

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3Home Screen “Main Menu” Features
The balance “Home Screen” which is the main menu for the balance is illustrated in Figure 13. The upper bar of the home
screen shows two metrology values. “d” is the readability of the balance in grams. The “d” value changes as different
levels of precision are selected.
Max is the maximum capacity of the balance in grams. If the maximum capacity is exceeded the error message “Overload”
will occur, as shown in Figure 14, alerting that the balance is in an overload condition.
Figure 13. Default “Home Screen” or Main Menu
Figure 14. Overload Message if Maximum Weight Exceeded

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3.1 Home Icon
3.2 Zero/Tare Banner Area
Pressing the Zero/Tare banner at any time returns the display to zeros. Tared weighing means that the scale can be reset
to zero (“tared”) with the powder pan on the balance to remove the weight of the powder. So, when using the powder pan
that comes with the balance, selecting Zero/Tare will tare or zero out the weight of the powder pan so you only weigh the
contents. Note that when a tare weight that has been zeroed out is removed from the weighing pan, a negative reading is
displayed. To return the display to zeros, press one of the ZERO buttons.
Pressing the Zero/Tare when not using the powder pan or other weight to be tared, returns the balance to all zeros such as
shown in Figure 13. Oftentimes, the balance may show a weight even when there is nothing on the weighing pan such as
Figure 11 illustrates. This can be due moisture, dust or other debris collecting on the weighing pan or powder pan,
disturbances such as vibrations sensed by the balance, or quick transitions in temperature. It is good practice to zero the
balance before each measurement to eliminate this measurement disturbance.
3.3 Weight value display
In Figure 13, the 0.0000 value is the weight measurement value in the precision selected.
3.4 Units of Measure
Pressing the units banner opens the submenu shown in Figure 15 that allows for the selection of the following units of
measure: grams (g) or grains (gr). When the submenu opens, touch the units desired.
Figure 15. Selecting the Units of Measure

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3.5 OK Icon
The Cabus balance is a high precision balance that measures force. It is therefore sensitive to external forces such as air
drafts, vibrations, or shocks (i.e., dropping heavy item next to the balance). To assist balance users, Scientech added a
green “OK” graphic as shown in Figure 16 on the home screen to provide an indication as to whether the balance is
experiencing external forces that may interfere with measurements.
If the green “OK” does not appear at all or flickers on and off frequently, then that is an indication that the environment
that the balance is being used in is not ideal for precise measurements. Reference Section 1 for mitigation steps to
improve the environment.
Ideally, measurements should be made when the green “OK” graphic appears. However, measurements may still be made
if the green “OK” graphic is not showing. It may take longer for the measurement value to settle to a value. This is more
noticeable at high precision settings. The lower the precision setting, the quicker the measurement value will settle to a
value.
Figure 16. OK and Thermometer Status Graphics
3.6 Thermometer Icon
The thermometer icon shown in Figure 16 in the lower right next to the green “OK” provides an indication of thermal
stability inside the balance sensor. When the balance is first connected to power and turned on, the thermometer icon is
replaced with “Starting Up” message as shown in Figure 9. When the “Starting Up” message appears, the balance is not
ready for use.
As the balance thermally stabilizes the “Starting Up” message is replaced with the thermometer icon. There may be an up
arrow or down arrow to the left of the thermometer icon indication whether the balance sensor temperature is increasing
or decreasing . After thermally stabilizing, the arrows disappear, and the thermometer icon appears by itself such
as shown in Figure 16 indicating the balance is ideal for operation.
The balance has software that provides temperature compensation. The arrows next to the thermometer provide
indication that temperature compensation is taking place.

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3.7 Calibration Icon
Calibration of the balance should always be performed at the location where it is being used and only after leveling the
balance. Perform calibration every time you move your balance. Calibrate the balance using an external calibration weight.
Either a 50-gram weight or 10-gram weight with the appropriate weight tolerance may be used for calibration. The balance
will detect the target weight.
Lower calibration weight tolerances produce more precise calibrations. An International Organization of Legal Metrology
(OIML) Class E2 calibration weight or better is required for calibrating the Cabus balance which has readability of 0.1 mg. A
50-gram Class E2 analytical weight with a weight tolerance of ±0.10 mg may be purchased from Scientech. Alternatively, a
10-gram Class E2 weight with a tighter weight tolerance of ±0.06 mg may also be purchased from Scientech.
Calibrations must be performed in the units of grams. If you are weighing in grains, the balance will automatically convert
to grams if the calibration icon is selected. To perform a calibration:
1. Select the calibration weight icon from the Figure 13 home screen. The calibration submenu shown in Figure 17 will
open. “Target” is the calibration weight that should be used. “Reading” is the measurement.
2. The “Calibrate” banner is gray to begin with and until a calibration weight has been placed on the weighing pan.
Target has no value until a calibration weight is placed on the weighing pan.
3. Zero the balance.
Figure 17. Start of Balance Calibration
4. Add either a 50 gram or 10 gram calibration weight to the weighing pan. Both 50 gram and 10 gram calibration
weights are default weights.
5. The message “Waiting on stable weight” will appear during calibration as shown in Figure 18.

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Figure 18. 10 Gram Calibration Weight Placed on Weighing Pan
6. Wait for the “Waiting on stable weight” to turn to a “Calibrate” banner. When the “Calibrate” banner turns green,
that indicates calibration is completed as shown in Figure 19 for a 10 gram calibration weight or Figure 20 for a 50
gram calibration weight.
Figure 19. Calibration Complete Using 10 Gram Weight

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Figure 20. Calibration Complete Using 50 Gram Weight
7. After the “Calibrate” banner turns green, the calibration weight may be removed.
If an alternative calibration weight other than a 50 gram or 10 gram weight is used, the balance will detect this and
provide a message “Mismatched target weight”. In the example shown in Figure 21, a 20 gram calibration weight was
used.
Figure 21. Example of Alternative Calibration Weight is Used
Select the “Target” weight value shown in Figure 21. This will open the Figure 22.
To Enter
Alternative
Calibration
Weight
Touch
Here

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Figure 22. Screen to Enter Alternative Calibration Weight
Select the “Target” weight value and then use the numerical keys and back space to enter a new calibration weight value.
Figure 22 shows that a 20 gram calibration weight was entered.
When the alternative calibration weight value is entered correctly, select the “”icon to enter the value.
The Figure 23 screen will appear. The “Reading” shows the actual weight of the calibration weight used which rarely is
exactly the calibration value desired.
Select the green “Calibrate” ribbon to calibrate the balance. The Figure 23 screen with be replaced with the Figure 24
screen showing that calibration was performed to the alternative weight.
Figure 23. Ready to Calibrate Balance with Alternative Calibration Weight
Select the
Check Icon
to enter
new
Calibration
Weight

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Figure 24. Balance calibrated with Alternative Calibration Weight
Calibration weights between 10 grams and 50 grams may be used.
3.8 Settings Icon
Figure 25. Submenu Banners Under Settings
Tap on Settings
Icon to open
Categories

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4Settings Submenu’s
After the balance has been plugged in and turned on, allow it to warm up. Then follow the leveling instructions to level
the balance followed by the calibration instructions to calibrate the balance.
4.1 Level the Balance
If the balance module is placed on a level surface, the balance module should then also be level. Since level surfaces are
the exception, the balance module has leveling feet that may be manually adjusted and the control module has a leveling
setup mode accessed from the main menu by selecting settings icon and then selecting “Level” shown in Figure 25. The
leveling application shown in Figure 26 will open.
The balance module is leveled by adjusting the three balance feet so that the bubble is in the center of the target. To the
right of the bubble level there are messages that guide which foot to adjust.
Adjust (turn) the balance module front feet (shown in Figure 1) to level the balance by centering the control module bubble
in the level indicator shown in Figure 26. Adjust the single rear foot to level the balance from font to back. Turning the foot
clockwise raises that side of the balance and an opposite adjustment lowers it. When properly adjusted the bubble will be
in the center of the Figure 26 target.
Figure 26. Leveling the Balance Module
4.2 Precision Capabilities
There are four precision level settings accessed from the main menu by selecting settings icon and then selecting “Precision”
shown in Figure 25. Depending on the units selected in Section 3.4, a different precision setting submenu will open as shown
in Figure 27 for grains or grams. As more precision is selected, the balance will appear to be more sensitive to external
environmental force interferences in which 10-3 or 10-4 units will display a value. Use “Zero/Tare” to zero these values before
a measurement. For good weighing practice, do not use more precision than required for the application. This will allow the