MSI 3750CS-5 User manual

MSI3750CS-5
RF Digital Weight Indicator
a component of the CellScale® System
Measurement Systems International
User
Guide
NOW NTEP APPROVED!
COC # 05-077

Page 2 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
TABLE OF CONTENTS
Introduction ...................................................................................3
3750CS Display .............................................................................3
3750CS Front Panel .......................................................................3
Features ..........................................................................................4
SECTION 1 – UNIT INSTALLATION .............................................................5
Power .............................................................................................5
Totalize Switch option ...................................................................5
3750CS Rear Connectors ..............................................................5
3750CS Table Mount .....................................................................6
3750CS Wall Mount ......................................................................6
SECTION 2 – RF SCALE COMMUNICATIONS ...............................................7
Introduction – The CellScale system .............................................7
FCC Statement ...............................................................................7
Network Description .....................................................................7
Antennas ........................................................................................8
Standard Antenna ...........................................................................8
Long Range Omni 9dBi Antenna w/ Pipe Mount .........................9
Yagi Antenna ...............................................................................10
Corner Reflector Antennas ..........................................................10
Vehicle Mount Whip Antenna .....................................................10
Standard antenna bulkhead extensions ........................................11
Other Antennas ............................................................................11
2.4 GHz Interference ...................................................................11
FCC’s MPE Requirements ..........................................................11
RF Network Setup .......................................................................12
Configuring for multiple networks ..............................................14
Interpreting the RF Bar Graph .....................................................15
Troubleshooting RF Connection Problems .................................15
SECTION 3 – SCALE OPERATION .............................................................17
POWER .......................................................................................17
Multiple scale channels ...............................................................17
To Access Multiple Channels ......................................................18
ZERO ...........................................................................................18
Setup Zero ...................................................................................19
TARE ...........................................................................................19
SETUP TARE ..............................................................................21
NET/GROSS ...............................................................................23
UNITS .........................................................................................24
Setup Units ..................................................................................24
PEAK HOLD (Function Key Option) .........................................24
PRINT ..........................................................................................25
TEST ............................................................................................25
Activate & Deactivate Channels .................................................25
SECTION 4 – FUNCTION KEYS ................................................................26
Setup Function Keys ....................................................................26
SECTION 5 – ID CODES .........................................................................28
ID Code Organization ..................................................................28
Using ID Codes ...........................................................................30
Setup ID Codes ............................................................................33
ID Code String 1 & String 2 ........................................................34
SECTION 6 – TOTAL / STATISTICS ............................................................35
Total .............................................................................................35
Auto Total ....................................................................................35
Total Menu (Setup Total) .............................................................36
View Total ....................................................................................38
Clear All Totals ............................................................................39
Alternate Clear Total Methods ....................................................39
Statistics ......................................................................................39
SECTION 7 – 3750CS METER SETUP .....................................................41
Main Setup Menu ........................................................................41
Real Time Clock / Calendar ........................................................43
Setup Power Menu ......................................................................44
Bar Graph Menu ..........................................................................45
Lock .............................................................................................46
SECTION 8 – SET POINTS .......................................................................49
Introduction .................................................................................49
Set Point Setup Menu ..................................................................50
Example Set Point Programming ................................................52
Relay Output Option ....................................................................57
SECTION 9 – COMMUNICATION PORTS .....................................................61
Introduction .................................................................................61
Electrical Conformance ...............................................................61
Comm Port Cabling .....................................................................61
Data Configuration ......................................................................61
Output Control .............................................................................61
Comm Port Parameters ................................................................62
Format ..........................................................................................62
Comm Port 2 setup parameters ....................................................63
Printer / Output Formatting .........................................................63
Example Printer Formatting ........................................................64
Programming the End of Line String ..........................................65
Editing The Print String ...............................................................65
General Text/control Character Entry .........................................65
Serial Output “@” Commands ....................................................66
Computer Operation Via Host Codes ..........................................73
Host Code Commands .....................................................................
SECTION 10 – CELLSCALE CALIBRATION ................................................77
Calibrate General Information .....................................................77
Enable Calibration .......................................................................77
Reset Calibration .........................................................................79
Reset All ......................................................................................79
Calibrate Setup Menu ..................................................................80
Legal Standard .............................................................................80
To Calibrate ................................................................................81
To enable / disable azm (auto Zero Maintenance) .......................82
Motion band .................................................................................83
Center-of-Zero (COZ) Indicator ..................................................84
Setting Up The Motion Compensation Option ............................84
APPENDIX A – MENU MAPS ..................................................................86
APPENDIX B – ASCII CHART ................................................................92
APPENDIX C – SPECIFICATIONS & SUMMARY OF FEATURES ......................93
APPENDIX D – INTERNAL WIRING ..........................................................95
THE MSI LIMITED WARRANTY ..............................................................96

CellScale® System • 3750CS-5 User Guide Page 3
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
INTRODUCTION
The Measurement Systems International MSI 3750CS RF Weigh Meter is an element of MSI's CellScale® System.
Combined with 1 or more CellScales, the 3750CS provides complete control over all scale and data functions. The
3750CS serves as a remote terminal for any CellScale and has no internal measurement capability. One 3750CS
can read the output of many CellScales, and 1 CellScale can also provide data to many 3750CS'. The large, backlit,
alphanumeric display provides precise, unambiguous indication of operating modes such as Net, Gross, or Total.
The 3750CS can calibrate a CellScale remotely and provides a simple user interface to the advanced features
of the CellScale. Digital calibration makes maintaining the system a snap, and the single board, marine-proof
(NEMA 4) construction makes for a rugged and reliable remote indicator. The 3750CS combined with a CellScale
is designed to meet or exceed the requirements of all regulatory agencies.
3750CS DISPLAY
3750CS FRONT PANEL

Page 4 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
FEATURES
• Designed to meet or exceed all US and international standards.
• 6 Large, (.9”) digits for clear weight readings from a distance.
• Reliable 2.4 GHz Frequency Hopping RF communications. Highly immune to interference and multi-path
problems. Range in excess of 600 feet indoors and up to 5 miles line of sight with gain antennas.
• Each 3750CS can act as a terminal for any CellScale. A 3750CS can monitor multiple scales on a single
CellScale, or multiple scales tied to multiple CellScales.
• Up to 32 per connected CellScale ID Codes with separate Alphanumeric Names, Tare, Mode, and Totals. ID
Codes are addressed by any customer given name or number.
• Easy to read annunciation of ID Names and Menu Prompts are provided on eight .5” alphanumeric Charac-
ters.
• Full RS-232 output formatting offers exceptionally versatile data output. Weight data can be printed in any
desired way, the customer can add any alpha characters and/or printer formatting commands, including for-
matting for Bar Code printers. The Comm Port is bidirectional allowing computer controlled operation and
data reception.
• Analog bar graph provided for relative to full-scale weight indication. Also used for RF level indication.
• Display illumination uses rugged, long life, LED backlighting coupled with a transflective LCD to provide
optimum display contrast under all ambient conditions from full sunlight to total darkness. Operation is light-
sensing automatic or manually set.
• Versatile power input options: AC Only (90-260 VAC 45-65 Hz), 9-36 VDC Input, and 18-60 VDC. Accessory
Power Supplies are available to allow 250 VDC operation as well.
• Easy to maintain: Full digital calibration assures reliable, repeatable measurements.
• Selectable for lb.., kg, g, tons, metric tons, ounces, and per cent (some units and /or units switching may be
prohibited in legal for trade units).
• Multi-mode automatic or manual weight totalizing with multiple ID registers.
• Complete Marine sealing ensures reliable operations under harsh conditions. Rugged cast aluminum package
is coated to resist corrosive atmospheres. Meets all requirements of NEMA 4 and IP66.
• 32 set points standard – programmable for any in-range weight for operator alerts or process control. Optional
Set Point Relay outputs are available for Set Points 1-8. Set point management is performed by the CellScale,
which has 32 programmable set points. The 3750CS has independent set point reaction (relays, messages,
display modes, comm port outputs, etc.).

CellScale® System • 3750CS-5 User Guide Page 5
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
SECTION 1 – UNIT INSTALLATION
The 3750CS is simple to setup and use. If there are no peripheral devices such as a printer or scoreboard, setup
consists of installing the mounting bracket (see Appendix A), plugging in the Antenna, and applying power. To
install an RS-232 cable, see the procedure in Section 8, “Comm Port Cabling”.
POWER
The 3750CS is available with three types of power inputs: 1) Universal AC power. Operates from 86 to 265 VAC
45 to 440 Hz 2) Vehicle Power. Available in two ranges, 9-36 VDC or 18-60 VDC. This power supply is transient
protected and filtered for use in vehicles such as cranes, forklifts, etc..
DC Cable Color Code
Blue – Connect to Battery Negative. It is generally best to connect this directly to the battery negative terminal,
or where the negative terminal is attached to the chassis.
Brown – Connect to Battery Positive. Again, a direct battery connection is usually best to avoid interference with
vehicle electrical systems. The 3750CS is internally fused. If connected to a breaker or fuse panel, use 1A at 12V,
.5A at 24V. Fast blow or medium blow fuses are acceptable.
White, Black, and Green – These are reserved for control functions used in specials. Usually these should be
insulated and not wired anywhere. Please consult MSI for more information.
TOTALIZE SWITCH OPTION
When equipped with the totalize switch option, the user is responsible for providing a SPST (single pole, single
throw) momentary switch. This can be a push-button, foot switch, momentary toggle switch, etc..
Totalize Switch Cable Wiring
This input is designed to attach to a momentary SPST switch. Totals are triggered by shorting the blue and brown
wires together. Do not ground either wire. Insulate unused wires.
3750CS REAR CONNECTORS

Page 6 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
3750CS TABLE MOUNT
3750CS WALL MOUNT
1
2
3
4
5
6
7
8
9 (NC)
Brown (TD)
Black (RD)
Blue (GND)
Grey (CTS)
White (RTS)
Jumper 1-6-4
RS-232 DTE
9-Pin Male ‘D’
Solder Cup View
Wiring for direct 3750CS to
Printer/Scoreboard connection
1
2
3
4
5
6
7
8
(NC) 9
Brown (TD)
Black (RD)
Blue (GND)
Grey (CTS)
White (RTS)
Jumper 1-6-4
RS-232 DCE
9-Pin Female ‘D’
Solder Cup View
Standard wiring for direct
3750CS to Computer connection

CellScale® System • 3750CS-5 User Guide Page 7
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
SECTION 2 – RF SCALE COMMUNICATIONS
INTRODUCTION – THE CELLSCALE SYSTEM
The 3750CS is an element of the MSI CellScale System. The CellScale system uses frequency hopping spread-
spectrum RF Modem technology transmitting in the 2.4 GHz ISM band.
RF Modems have been problematic as the RF bands are very hostile, corrupted by noise, path loss and inter-
fering transmission from other radios. Even in a pure interference-free environment, radio performance faces
serious degradation through a phenomenon known as multipath fading, a problem particularly prevalent for
indoor installations. Multipath fading results when two or more reflected rays of the transmitted signal arrive
at the receiving antenna with opposing phase, thereby partially or completely cancelling the desired signal.
Spread spectrum reduces the vulnerability of a radio system to both interference from jammers and multipath
fading by distributing the transmitted signal over a larger region of the frequency band than would otherwise
be necessary to send the information. This allows the signal to be reconstructed even though part of it may be
lost or corrupted in transit.
Spectrum has been set aside at 2.4 GHz in most countries for the purpose of allowing compliant spread spectrum
systems to operate freely without the requirement of a site license. In the USA, there are absolutely no site
licensing requirements. The CellScale system is also programmable for use in most European countries. Please
contact MSI for worldwide compliance information.
FCC STATEMENT
Note: This unit has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at their expense.
The Transmitter Module is licensed as FCC ID: HSW-2450M.
NETWORK DESCRIPTION
The CellScale system uses frequency hopping which is produced by transmitting the data signal as usual, but
varying the carrier frequency rapidly according to a pseudorandom pattern over a broad range of channels, in
this case 86 discreet frequencies. These 86 frequencies are combined in different “hopping patterns” to provide
64 separate networks.
The CellScale network uses a ‘Star’ network topology. One unit, usually the scale, is designated a ‘Master’.
The Master transmits a sync pulse on a regular basis, providing synchronization of all remotes in the designated
Network. Thus it forms the center of a cell. MSI provides four products capable of being the master unit: the
CellScale, the CellModem, the 9300 Porta-Weigh+ Crane Scale, or the Trans-Weigh 6260CS Crane Scale. Up
to 16 slaves can access the master unit. The 3750CS is always a ‘Remote’. Multiple 3750CS units can coexist
on one network, or can be easily switched to other networks as required.
The CellScale system uses TDMA (Time Division Multiple access) to arbitrate between multiple remotes. TDMA
is slotted or scheduled.. Each remote has an assigned time to transmit and always is alloted time. TDMA assures
a consistant throughput from each remote.
For more on setting up CellScale networks, please refer to the CellScale manual,

Page 8 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
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ANTENNAS
To meet FCC licensing rules, you must use only antennas supplied or recommended by MSI. MSI offers the
3750CS with six antenna choices: 1) Standard Antenna – This is a small 1/2 wave antenna that mounts directly
on the 3750CS enclosure and is suitable for most short to medium range applications. 2) Long Range Antenna – A
high gain antenna that is remotely mounted from the 3750CS with a low loss coaxial cable. This omnidirectional
antenna increases the range up to 4 times. The 10' cable allows placement of the antenna above the 3750CS for
ease of clearing possible obstacles to data transmission. 3) Vehicle Mount Whip Antenna – This antenna mounts
directly to the roof of mobile vehicles and is weatherproof. 4) For maximum range, a 14dBi Gain Yagi Antenna
is available by special order. Please contact MSI for details. 5) Corner Reflector – Often the best choice for a wall
mounted antenna. MSI offers a 14dBi and a 9dBi Corner Reflector. 6) Patch Antenna – For applications where
the standard antenna is vulnerable to physical use or outdoor applications. The Patch antenna is mildly directional
which requires more care in antenna placement for long range applications. Patch Antennas are available by special
order only. See the CellScale Users manual for more details on antennas.
Antenna placement is critical to problem free use of your CellScale system.
1) Be sure a relatively clear transmission path exists between the 3750CS and associated CellScale master devices.
The radio signals travel primarily by line of sight (LOS), and obstructions between stations will degrade the
system performance. LOS is less important as distances decrease.
2) When using the long range antenna, mount the antenna on a tower or other elevated structure to ensure that
you have a clear LOS transmission path. This will raise the antenna to a level sufficient to clear surrounding
terrain and other obstructions. It is not necessary or desirable to provide a ground plane for the antenna.
3) Never use a directional antenna (e.g. a Yagi, or a corner reflector) on a mobile system. However, fixed station
locations can often benefit from directional antennas when the location of the other components of the RF
network are always in the same general direction.
4) If using the meter mounted standard antenna, ensure that the antenna is not blocked by any metal. Transmis-
sion is good through most kinds of glass so mounting a meter next to a window should work fine. If there is
no clear line of sight place to mount the 3750CS, consider switching to the long range antenna so the antenna
can be remoted.
5) The standard and long range antennas are vertical plane devices. Do not mount them sideways. They should
always point up (mounted vertically). It also works to point them down, when high off the ground (such as
on the underside of a large bridge crane). The long range 9dBi Antenna is particularly sensitive to off axis
mounting. Use a carpenters level to ensure the antenna is exactly 90° perpendicular to the earth.
6) Do not mount an omnidirectional Antenna next to a metallic or concrete surface. This can result in reflections
and undesired RF characteristics. For this application, use a Corner Reflector.
7) After installation, you must seal the Antenna connection with an Adhesive Heat Shrink Boot. Failure to seal
the Antenna may result in liquid destroying the Antenna, or the CellScale.
MSI does not recommend extending the coaxial cable beyond 3 meters. At 2.4GHz more loss will result from coax losses than
are gained by raising the antenna. If you must extend the antenna, use a very low loss 50Ω coax such as RG-214, RF-195, or
other low loss varieties. For very short extensions (<1m), cables made with RG-316 are suitable.
STANDARD ANTENNA
The Standard Antenna (pictured here) is an articulated 1/2 wave 2dBi gain design with a standard TNC
connector. This antenna and Coax connector, though resistant to water, is not water-proof. Seal the
TNC base with an adhesive heat shrink boot if this antenna is exposed to rain. This Antenna should
be vertically oriented.

CellScale® System • 3750CS-5 User Guide Page 9
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
Adhesive Heat Shrink
LONG RANGE OMNI 9dBi ANTENNA W/ PIPE MOUNT
The Long Range Omnidirectional antenna (MSI P/N 12147) is pole mounted (up to 2” diameter) and extends
the range of CellScale transmissions. MSI supplies this antenna with a 10’ (3m) coax cable pre attached. This
antenna must be vertically mounted. The vertical Beamwidth (-3dB point) is 14 degrees. Also available with an
N connector (MSI P/N 12037) for applications requiring longer coax cable lengths.

Page 10 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
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9 dBi Corner Reflector
YAGI ANTENNA
A highly directional YAGI Antenna is available by
special order. This antennas offers both high gain
(14dBi) and controllable transmission patterns.
This antenna must be carefully aligned for long
distance applications. The Beamwidth of the Yagi
is 30° Elevation, and 34° Azimuth. The Yagi is mast
mounted for masts up to 2-1/8” (5.4cm) in diameter.
The Yagi is connected to CellScale equipment with
adapter coax P/N 12751 (6’, 1.8m) or P/N 13209
(10’, 3m) Longer lengths available by special order.
Longer lengths must be evaluated by application
due to coax loss. It is usually preferable to run serial
cables longer and keep the Coax short.
CORNER REFLECTOR ANTENNAS
Two Corner Reflector Antennas are available by
special order. These antennas offer both high gain
and controllable transmission patterns. These anten-
nas are the best choice when antenna placement
is against a wall or other surface. These antennas
come with a Pipe mount for pipe up to two inches
(5cm) in diameter.
The 14dBi Model (MSI P/N 13204 + 13209 Coax)
features a Beamwidth of 44° Elevation, and 35°
Azimuth.
The 9dBi Model (MSI P/N 13205 + 13209 Coax)
has a Beamwidth of 75° Elevation, and 65° Azi-
muth.
Both Corner reflectors must be used with ‘N’ Plug to
‘TNC’ Plug adapter coax P/N 12751 (6’0) or 13209
(10’), longer lengths available by special order).
This is special Low-loss coax suitable for use at
2.5GHz. Do not substitute standard coax varieties.
VEHICLE MOUNT WHIP ANTENNA
14 dBi Yagi
14 dBi Corner Reflector
5 dBi Vehicle Whip
A vehicle mount whip antenna is approved for use with MSI CellScale equipment and is avail-
able by special order. This 5 dBi gain whip is rugged and waterproof and mounts in a 3/4” hole
on the roof of mobile vehicles. MSI P/N 13206 (Antenna) and P/N 13207 (mount). The mount
includes 17’ of low loss coax teminated in a TNC Connector.

CellScale® System • 3750CS-5 User Guide Page 11
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
STANDARD ANTENNA BULKHEAD EXTENSIONS
MSI offers short Coaxial cable assemblies to extend the antenna connector when the CellScale equipment is
mounted in an industrial enclosure. These Coaxial assemblies are designed for 2.4Ghz use and have TNC Male
connectors at both ends. These mate with a through panel TNC to TNC Bulkhead Adapter.
TNC to TNC Flange Mount Bulkhead Adapter – MSI P/N 13140
TNC to TNC Jam Nut Mount Bulkhead Adapter – MSI P/N 13141
Extension Coax Cable Assemblies –
1’ (30cm) P/N 13142, 2’ (61cm) P/N 13143, 3’ (.9m) P/N 13144, 4’ (1.2m) P/N 13145
OTHER ANTENNAS
Other antennas are available for special applications. One antenna MSI often uses is a small Patch antenna. This
antenna is suitable for rugged applications where standard antennas will often be destroyed. This is the antenna
used in our Crane Scales. Special antennas for rugged applications, or long range transmission are available.
Contact MSI for more information.
2.4 GHZ INTERFERENCE
Co-Existing with 802.11b Networks
In some cases, if a CellScale network is located in close proximity to an 802.11b network, the CellScale network
can interfere with the 802.11b network. To avoid causing this interference, the CellScale radio supports a selec-
tion of hopping patterns that avoid the various 802.11b direct sequence channels. These limited band hopping
patterns allow CellScale networks to be used with 802.11b networks without impacting the performance of the
802.11b networks. Settings for 802.11b avoidance are found in the Comm Port 2 modem menus. See page 34
for details.
FCC’S MPE REQUIREMENTS
Information to user/installer regarding FCC’s Maximum Permissible Exposure (MPE) limits.
Standard 1/2 Wave Dipole, Patch Antenna, Vehicle Whip, or Long Range 9dBi Omni: The field strength radi-
ated by any one of these antennas, when connected to MSI RF products, may exceed FCC mandated RF exposure
limits. FCC rules require professional installation of these antennas in such a way that the general public will
not be closer than 20 cm from the radiating aperture of any of these antennas. End users of these systems must
also be informed that RF exposure limits may be exceeded if personnel come closer than 20 cm to the apertures
of this antenna.
Corner Reflectors or 15dbi Yagi: The field strength radiated by any one of these antennas, when connected to
MSI RF products, may exceed FCC mandated RF exposure limits. FCC rules require professional installation of
these antennas in such a way that the general public will not be closer than 2 m from the radiating aperture of any
of these antennas. End users of these systems must also be informed that RF exposure limits may be exceeded if
personnel come closer than 2 m to the apertures of either of these antennas.

Page 12 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
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The 3750CS serves as a terminal for CellScales. Its response to key presses may be delayed due to transmission
times. The 3750CS will on occasion, display a “WAIT” message while transacting setups and scale controls.
!
RF NETWORK SETUP
The 3750CS is a RF Modem connected device. The RF Modem requires setup to connect to one or more
CellScales.
0=LOW
1=MED
2=HIGH
3750CS RF ENERGY
Enter
0-255
Enter
0-63
MODEM SETUP MENU
RF NTWK
ENERGY
C/S ID
NETWORK 0-63
Enter
0-254
3750CS
NODE ID
MASTER
CellScale ID
MY ID
EXIT
SETUP
!
MODEM
F1
Enter
0-1800s
TIMEOUT
Any F key
Programmed
to “Modem”
RF NETWORK
Sets the primary network number. Set this numbers to match the Network number of the CellScale master the
3750CS is associated with most often. Ranges from 0 to 63.
C/S ID
Sets the primary master CellScale ID number. This number must match the Source Address number of the
primary master CellScale. Ranges from 0 to 254.
MY ID
Each remote unit in a given Network must have a unique ID number. Enter up to three digits to designate the
3750CS ID number. Ranges from 0 to 254.
TIMEOUT
Sets the time in seconds (0-1800) that the 3750CS will wait for data from the CellScale. The display will blank
out if no data is received within this time period. Defaults to 10 seconds. Entering 0 turns off the Time-out
timer. MSI recommends at least a 5 second timeout period to handle small lapses in transmissions. The system
defaults to 10 seconds.
ENERGY
Sets the RF power level between 10mW (Low), 63mW (Med) and 250mW (High). In most applications power
should be set to High. Reduced energy can reduce the size of the coverage/interference zone which may be
desirable for multiple-network applications. Always check for adequate range coverage when using the Low
or Med setting.

CellScale® System • 3750CS-5 User Guide Page 13
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
Configuring the RF Modem
Assumes F1 is configured as “MODEM”, see “Setup Function Keys”.
1) Push the SETUP key.
2) Push the MODEM key (usually F1). The display
enters the Setup MODEM mode.
3) Push ENTER. The first menu item is RF NTWK.
The numeric digits indicate the current network.
4) Change the Network number by pushing the numeric
keys. As soon as you start entering numbers the
screen reads “NEW N/W”. Available network num-
bers range from 0-31.
In this example we’ll use network 12. Use the appropriate numbers for your
CellScale master. It is not necessary to enter a ‘0’ for networks below 10.
Push the 1 key followed by the 2 key.
5) Push ENTER to set your Network choice into
memory. The 3750CS tries to contact the new net-
work while indicating “FINDING”. If the master
unit is on it will connect. If not, the display will flash
briefly “NO NETWK”.
The “NO NETWK” or “NO TARGET” messages can be safely ignored at this
time. It indicates only that the chosen network is not on or in range.
6) Push the UP key to the “C/S ID” menu.
7) Use the numeric keys to change the C/S ID number
to match the SRC address programmed in the
CellScale master. Available C/S ID numbers range
from 0-254.
In this example we’ll use source 75. Use the appropriate numbers for your
CellScale master. It is not necessary to enter leading zeros.
8) Push the ENTER key to set the C/S ID.
9) Push the UP key to the “MY ID” menu. This is the
Node ID of this 3750CS remote.
10) This step is optional. My ID is important only if mul-
tiple slaves are present on the set Network. Use the
Numeric keys to input a unique ID for this 3750CS,
then push ENTER.
11) Push the UP key to the “ENERGY” menu. The
numeric display indicates the current energy level, 2
equals High Power, 1 equals Med Power, 0 indicates
Low power.
12) Press the 0, 1 or 2 key as needed.
MSI recommends using high power (2) in most
installations.
13) This completes the MODEM setup. Push the EXIT
key to return to normal scale operation.
14) If the 3750CS is reporting “NO TARGET” it may
be necessary to send the “Talk to me” message. Do
this by pushing the MODEM key (usually F1).
1
2 MODEM
3 RF NTWK
4 1_
NEW N/W
4 12
5 FINDING
5 RF NTWK
6 C/S ID
7 7_
7 75_
8 C/S ID
9 MY ID
10 Enter ID for this 3750CS
10 NEW ID
11 2
ENERGY
12
13

Page 14 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
Enter Net
(00-63)
followed by
Source ID
(000-254)
MASTER CellScale
NETWORK
& SOURCE ID
RF NETWORK
SETUP MENU
NET 2
NET 3
NET 1
NET 4
NET 5
(Usually F2)
F2
RF NET
Any F key
Programmed
to “RF NET”
EXIT
SETUP
!
CONFIGURING FOR MULTIPLE NETWORKS
The 3750CS can access multiple CellScales by switching Networks. By programming a Function key to “RF
NETWK” a double push of the key will change the network allowing the 3750CS to monitor and control differ-
ent scales. Because each CellScale has both a network and a C/S ID, these must be set up with the “SETUP RF
NETWORK” menu. The 3750CS can access up to 5 CellScale based Networks. It takes the 3750CS from 4 to 7
seconds to switch networks, as it has to sync with a new hopping pattern.
1
2 RF NTWK
3 NET 1
4 0_-
NEW NTWK
4 02-
NEW CSID
5 02-1_
NEW CSID
5 02-12_
NEW CSID
6 02-012
NET 1
7 NET 2
8
1) Push SETUP.
2) Push the RF NET key (usually F2). The display
enters the Setup RF NETWORK mode.
3) Push ENTER. The first menu item is “NET 1”. The
numeric digits indicate the current network / CS ID
pair.
4) Change the Network number by pushing the numeric
keys. Available network numbers range from 0-63.
In this example we’ll use network 02. Use the appropriate numbers for your
CellScale master. You must enter a leading ‘0’ for networks below 10.
Push the 0 key followed by the 2 key.
5) Use the numeric keys to change the C/S ID number to
match the C/S ID of the CellScale master. Available
C/S ID numbers range from 0-254.
In this example we’ll use C/S ID 12. The second half of the 5 digit entry
does not need leading zeros put in.
Push the 1 key followed by the 2 key.
6) Push the ENTER key to set the RF Network entry
for NET 1.
7) Use the UP key to scroll to the next needed NET x.
Repeat steps 3-5 to enter more Network addresses.
Up to 5 addresses can be programmed.
The 3750CS uses 55-555 as a place keeper for empty NET addresses.
8) Push the EXIT key after all needed RF Networks are
set up.
Set Up Multiple Networks
This procedure assumes F2 has been configured to the function “RF NETWK”.

CellScale® System • 3750CS-5 User Guide Page 15
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
INTERPRETING THE RF BAR GRAPH
The RF Bar Graph is a useful tool for displaying the state of communications between the 3750CS and the master
CellScale. Referring to the illustration, the far left Tick (1) indicates the internal Modem is connected. The second
tick (2) indicates that the Display processor has successful serial communications with the RF Modem processor.
The third tick (3), when lit, indicates that a master CellScale is detected and the 3750CS has sync’d up. All addi-
tional bar segments indicate transmission and reception of usable packets. It is not necessary that the bar graph
is full for communications to be successful. The bar graph will often change state while in setup menus because
the 3750CS is busy and not requiring data packets sent or received.
TROUBLESHOOTING RF CONNECTION PROBLEMS
Most connection problems are caused by improperly set up RF Networks. Both the 3750CS and the master
CellScale unit must have identical Network numbers. In addition, the CS ID must match on both units. If the
Net-ID of the CellScale is in question, you might have to connect a terminal to the CellScale to determine its
exact NET-ID. See the CellScale manual for this procedure. Verify the 3750CS settings are proper by using the
“CONFIGURE RF MODEM” procedure.
3 Segments of the Bar Graph are showing, the message reads “NO NETWK”
Use the Bar Graph as described above to get some indication of RF problems. If the first 3 left most segments are
on, a Master CellScale is detected. The absence of additional segments indicates that the CellScale and 3750CS are
not conversing. Pushing the MODEM key (usually F1) will send a “Talk to me” message to the master CellScale.
If this fails to initiate conversation, recheck your C/S ID numbers and make sure they match. Also, if there are
additional 3750CS units set to the same network, they must have different Remote IDs (see “MY ID”).
Another common cause of perceived problems is the “Phantom Network”. This occurs when there is a conflict-
ing Network within broadcast range. Multi-CellScale sites must be planned carefully so that there are never two
master CellScales on the same Network number within range of each other. Since the CellScale can broadcast for
miles with good LOS (line of sight) conditions, this consideration is very important. If you suspect your 3750CS
has locked on to a distant (Phantom) network, try switching both the master CellScale and the 3750CS remote
to another unused Network. MSI advises avoiding Network #0 when possible, as this is the Modem default, and
therefore most likely to be found on units not properly set up.
Weight displays, but 3750CS keys don’t work
This is a result of changing the C/S ID in the remote 3750CS so it no longer matches the master CellScale. The
modem is still registered by the master CellScale, but control codes are not received because the master assumes
the codes are intended for a different remote CellScale. Change the C/S ID in the 3750CS back to the number
that matches the master CellScale.
Unit goes in and out of communication
This is usually a result of being in or near an “RF Null” zone. Because of multiple echoes of signals there is
sometimes locations that are particularly problematic even for Frequency Hoppers. Usually moving the antenna
location even a small distance can clear up this kind of problem. Avoid placing the antenna up against large metal
walls. The antenna should be at least 4 inches away from large metal surfaces. When close to a wall, this has the
effect of making the Antenna directional.

Page 16 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
Range is Inadequate
Antenna placement is the most common cause of poor range. Check that the RF power level of the master and
remote units is on “High”. Radio signals in nearby bands that have significant power can also reduce range. Lon-
gest range will always be achieved by Line-of-sight antenna placement. Any obstacle that interferes with LOS
will reduce the range. Particularly bad blocking is caused by metal buildings, solid concrete walls, and anything
else that has fairly high electrical conductance. Raising the antennas higher can help. Sometimes just moving the
antennas sideways will find an RF “path” that will improve distance. The CellScale can sometimes take advantage
of reflecting surfaces to get around obstacles. Antennas should always be place in vertical polarization, that is
the shaft of the antenna should be perpendicular to the earth, not parallel. It is OK to mount the Antenna upside
down. This is a good solution when an antenna is mounted on the ceiling for communication with CellScale
components in the building.
FIRMWARE VERSION NOTICE
This User Guide is intended for CellScale equipment that uses MSI’s next generation of RF Modems. This guide
applies only to 3750CS Indicators manufactured after 5/1/06. There are menu differences and feature additions
not found in first generation CellScales. These devices all have code installed starting with version 2-21 or above.
Version 2-xx is not compatible with CellScale equipment manufactured before 4/1/06 and the Modems installed
cannot communicate with CellScale equipment not specified as having 2nd generation modems. Compatible
CellScale equipment (6260CS, 9300, 9000, 9260) contain firmware 5-00 or higher.
Older CellScale equipment can be upgraded to 2nd Generation by exchanging the Modems and updating the
firmware. Contact MSI for pricing information.
Previous Versions of this User Guide are available by special request.

CellScale® System • 3750CS-5 User Guide Page 17
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
SECTION 3 – SCALE OPERATION
POWER
Turns the Weight Indicator On and Off.
To Turn On the Power
1
2
If the system fails to connect in 10 seconds or less, push the
MODEM key to send a “Talk-to-me” message. If this fails check RF
network setups, or decrease the range between the CellScale and
the 3750CS..
1) Push POWER. The system performs a display check:
All segments and the Set Point / Total LED’s illumi-
nate for 3 seconds, then turn off for 1/2 second.
2) The LCD displays “3750 CS” and the software ver-
sion number.
3) Next the RF network is contacted. If the network is
functional, the display reads “WAIT” then displays
the current weight. This usually takes 4-6 seconds.
MULTIPLE SCALE CHANNELS
Each CellScale is capable of hosting up to 32 independent scale inputs. Since any 3750CS can communicate with
any CellScale, theoretically hundreds of scales can be controlled by a single 3750CS.
Because of the complexities of multiple channel setups, the 3750CS is designed to access channels that have been
previously setup in the CellScale through its terminal interface or virtual meter interface.
Channels in the CellScale are organized by A/D input channel followed by Mux sub channel value. The standard
CellScale has 2 A/D inputs, but can be ordered with 4 A/D inputs with the addition of a second A/D Converter
module. Each A/D channel can be further divided by the use of external multiplexers into 8 additional inputs per
channel, providing a total of up to 32 independent scale inputs. The channels are designated like this:
Channel (A/D 1-4) > 1-1 < Sub channel (mux 1-8)
The channel will vary from 1-4 and the sub channel from 1-8. In addition the CellScale provides channel 5 for
remote CellScales, and channel 6 for math channels which allow the user to add or subtract channels from each
other or perform other math manipulations of the data. All calibration data for the 32 channels is stored in the
CellScale and is independent of the 3750CS. Therefore any 3750CS can receive calibrated data from any CellScale
provided the RF network is set up properly.
It should be noted that sub channels are useful even when the multiplexer option is not used. For example, chan-
nel 1-1 could be calibrated as a 1000 x 0.5 kg scale, and channel 1-2 as a 2000 x 1 kg scale, making a dual range
platform (of course this assumes the platform is capable of handling 2000 kg). This will work as long as the main
channel remains constant. So, in theory, 1 platform could be calibrated as 8 independent scales. This works because
the CellScale does not know or care if a Multiplexer is actually present. It treats the input as a separate scale.
The 3750CS is unable to read the channels directly. It reads multiple channels by using the Scan list index. The
“Scan list” is stored in the CellScale, with up to 32 channels present in the list. The first number in the scan list
is called the Scan List Index number. The CellScale can have up to 32 Scan List indices. A scan list can include
“Math Channels” which provide a means to add digitally the results of multiple scales. For example a scan list
could look like this:
1= 1-1
2= 1-2
3= 1-3
4= 1-4
5= 6-1 Channel 6-1 defined as (CH1-1)+(CH1-2)
6= 6-2 Channel 6-2 defined as (CH1-3)+(CH1-4)
7= 6-3 Channel 6-3 defined as (CH1-1)+(CH1-2)+(CH1-3)+(CH1-4)
This scan list could be used with a wheel weighing system. The first 4 channels are connected through a CellScale
Multiplexer and provide individual wheel loads. Index position 5 shows front axle load, index 6 shows rear axle
load, and index 7 shows total weight. The CellScale allows the user to name each channel and the name can appear

Page 18 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
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Push ZERO. The weight reading must be stable
within ±1 division for the zero function to work.
The display temporarily reads “ZEROED” and the
digits display 0. The backup memory stores the zero
reading, and can restore it even if power fails.
Final: The numeric digits display “0” (or 0.0 or 0.00,
etc.).
ZEROED
1) Push the SC INDEX key (F3 in this example). The
message “SC INDEX” appears, and the numeric
digits indicate the current SC Index # (1-32).
2) Within three seconds, push either the SC INDEX
key again or the UP scroll key. The Scale Channel
will index to the next channel in the list.
To go to the previous channel in the list, push the DOWN scroll key within
3 seconds of the SC INDEX key. (This won’t work if you used F2 for the
SC INDEX key)
3) Either wait three seconds for normal display function
to return, or you can push ENTER or EXIT to hasten
return to standard scale function, now operating on
a new scale channel.
.01
1 SC INDEX
.02
2 SC INDEX
3 or wait 3 seconds.
on the message (lower) display of the 3750CS. When dealing with multiple channels it is recommended that you
program the lower display mode to either display the scale channel number (LC NUMBR), the Scan List Index
number (SC INDEX), or the channel name (LC NAME).
See the “METER SETUP” section 7 to configure the lower display mode.
For more information on Scan Lists and dealing with multiple channels, please refer to the CellScale manual.
TO ACCESS MULTIPLE CHANNELS
As mentioned above, the 3750CS will access any channels setup in the CellScale. It does this with the “SC INDEX”
function. The SC INDEX steps from channel to channel as dictated by the Scan list stored in the CellScale. If the
CellScale has only one scale channel defined, this procedure is not necessary. This is always the case for MSI-
6260CS Crane Scales and other single load cell systems.
For systems with multiple scales attached to any given CellScale the setup procedure is:
1) Program the CellScale Scan List as required (see the CellScale Manual).
2) Program a function key for “SC INDEX” (see section 4 – FUNCTION KEYS).
3) Optional but recommended so you can readily identify which scale you are monitoring and controlling – Pro-
gram the lower display mode for “LC NUMBER”, “SC INDEX”, or “LC NAME” (see section 7 – METER
SETUP).
To Change Scale Channel
This example assumes F3 has been setup for “SC INDEX”.
ZERO
Sets the zero reading of the scale. Use the zero key to take out small deviations in zero when the scale is unloaded.
(See “TARE SET” for zeroing (Taring) package or pallet weights)
To Zero
Rules for Use:
1) Works in GROSS mode or NET mode. Zeroing while in Net mode will zero the gross weight causing the
display to show the negative Tare value.
2) The scale must be stable. The scale will not zero if the motion detect annunciator is on.
3) The scale will accept a zero setting over the full Range of the scale (NTEP and other Legal-for-trade models
may have a limited zero range). Zero settings above 4% of full scale will subtract from the overall capacity of
the scale. For example if you zero out 100 lb.. on a 1000 lb.. scale the overall capacity of the scale will reduce
to 900 lb.. plus the allowed over-range amount.

CellScale® System • 3750CS-5 User Guide Page 19
MEASUREMENT SYSTEMS INTERNATIONAL
Software V2-21 or greater, 2nd Generation Modem
SETUP ZERO
In some applications it is desirable to have the scale return to a number other than zero. This is used in safety
applications where the weight of the scale itself must be taken into account, showing all weight hanging on a
crane. This feature may be disabled in Legal-for-trade units.
To Apply a Zero Offset
1
2 SET ZERO
3 WEIGHT
4 6_
4 60
5 SET ZERO
6
1) Push SETUP.
2) Push the ZERO key. The display enters the Setup
ZERO mode.
3) Push ENTER. The current Zero offset value is dis-
played.
4) Use the numeric keys to change the zero offset as
desired.
In this example, we’ll enter 60 kg as a zero offset.
5) Push ENTER to set your Zero offset value into
memory.
This is the number the scale will display after you push Zero.
6) Push the EXIT key to return to normal scale opera-
tion.
TARE
Tare is typically used to zero out a known weight such as a packing container or pallet and display the load in
NET weight. A Tare value is entered in one of three ways:
1) AUTO TARE – When the TARE key is pushed twice, the current weight is zeroed and Net Weight is dis-
played.
2) KEYBOARD TARE – Using the numeric keys, the operator keys in the desired Tare Weight then pushes the
ENTER Key.
3) TARE UP/DOWN – Using the Scroll Keys, the Tare value is changed one scale division at a time. TARE
UP/DOWN is useful for increasing or decreasing the current Tare value slightly. The Keyboard Tare and Tare
Up/Down modes can be disabled through the use of SETUP TARE. In the “AUTO” mode a single push of
the TARE key will enact AUTO TARE.
To Auto Tare
1
2
1) Push TARE. The current Tare value is displayed.
If the TARE key is setup for “AUTO” only one push of the TARE key will be
necessary.
2) Push TARE again. Assuming no motion, the display
temporarily reads “TARE SET” and then converts to
a “NET” display. All following readings are devia-
tions from the set Tare value.

Page 20 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR
®
To Use Tare Up/Down
(TARE key function must be set to “KBD/UPDN”)
To Read the Tare Value
(without changing it) TARE key function must be set to “KBD/UPDN”.
1
1
2 CLEARING
1) Push TARE. The message display reads “TARE” and
the current Tare value appears on the numeric digits
for 2 seconds. Note or Print the value as desired.
1) Push TARE followed by CLR (ZERO). The message
display reads “CLEARING”. The scale returns to the
GROSS mode.
Alternate method: Remove all weight from the scale (Gross Zero) and push
TARE. The message display temporarily reads “TARING”. Then the scale
returns to the GROSS mode.
To Clear Tare and Revert to Net Mode
To Keyboard Tare
(TARE key function must be set to “KBD/UPDN”)
1
2
3
4
1
2
2
3
1) Push TARE. The display reads “TARE”. Any current
Tare value is displayed.
You have only three seconds to start step 2.
2) Using the numeric keys input the value desired. In
this example we’ll use 0.5 lb.. as a Tare Value.
The 3750CS will automatically place a leading zero if the Tare value starts
with the decimal point.
3) The Tare Value “0.5” is displayed.
4) Push ENTER to place the value in the Tare Register.
The display reads “TARE SET” and displays the Tare
value for 1 second. All subsequent readings have the
Tare value subtracted and are displayed in “NET”
weight.
1) Push TARE. The display reads “TARE”. Any current
Tare value is displayed. In this example a value of
9.5 lb.. was previously Tared.
2) Within 2 seconds after pushing the TARE key, use the
UP or DOWN scroll keys to increment or decrement
the Tare value. Each single push of the scroll keys
will change the current Tare value 1 scale division.
In this example, the scale increment is .5 lb..
3) The Tare Value “10.5” is displayed. Push ENTER to
place the value in the Tare Register. The display reads
“TARING” followed by “TARE SET” and displays
the Tare value for 1 second. All subsequent readings
have the Tare value subtracted and are displayed in
“NET” weight.