Model 482C24 SENSOR SIGNAL
Model 482C24
SENSOR SIGNAL CONDITIONER
Installation and Operating Manual
For assistance with the operation of this product,
contact the PCB Piezotronics, Inc.
Toll-free: 716-684-0001
24-hour SensorLine: 716-684-0001
Fax: 716-684-0987
E-mail: [email protected]
Web: www.pcb.com
Warranty, Service, Repair, and
Return Policies and Instructions
The information contained in this document supersedes all similar information that
may be found elsewhere in this manual.
Total Customer Satisfaction – PCB
Piezotronics guarantees Total Customer
Satisfaction. If, at any time, for any
reason, you are not completely satisfied
with any PCB product, PCB will repair,
replace, or exchange it at no charge.
You may also choose to have your
purchase price refunded in lieu of the
repair, replacement, or exchange of the
product.
Service – Due to the sophisticated
nature of the sensors and associated
instrumentation provided by PCB
Piezotronics, user servicing or repair is
not recommended and, if attempted,
may void the factory warranty. Routine
maintenance, such as the cleaning of
electrical connectors, housings, and
mounting surfaces with solutions and
techniques that will not harm the
physical material of construction, is
acceptable. Caution should be observed
to insure that liquids are not permitted to
migrate into devices that are not
hermetically sealed. Such devices
should only be wiped with a dampened
cloth and never submerged or have
liquids poured upon them.
Repair – In the event that equipment
becomes damaged or ceases to
operate, arrangements should be made
to return the equipment to PCB
Piezotronics for repair. User servicing or
repair is not recommended and, if
attempted, may void the factory
warranty.
Calibration – Routine calibration of
sensors and associated instrumentation
is recommended as this helps build
confidence in measurement accuracy
and
acquired
data.
Equipment
calibration
cycles
are
typically
established by the users own quality
regimen. When in doubt about a
calibration cycle, a good “rule of thumb”
is to recalibrate on an annual basis. It is
also good practice to recalibrate after
exposure to any severe temperature
extreme, shock, load, or other
environmental influence, or prior to any
critical test.
PCB Piezotronics maintains an ISO9001 certified metrology laboratory and
offers calibration services, which are
accredited by A2LA to ISO/IEC 17025,
with full traceability to SI through
N.I.S.T. In addition to the normally
supplied calibration, special testing is
also available, such as: sensitivity at
elevated or cryogenic temperatures,
phase response, extended high or low
frequency response, extended range,
leak testing, hydrostatic pressure
testing, and others. For information on
standard recalibration services or
special testing, contact your local PCB
Piezotronics
distributor,
sales
representative, or factory customer
service representative.
Returning Equipment – Following
these procedures will insure that your
returned materials are handled in the
most
expedient
manner.
Before
returning any equipment to PCB
Piezotronics,
contact
your
local
distributor, sales representative, or
factory customer service representative
to obtain a Return Warranty, Service,
Repair, and Return Policies and
Instructions Materials Authorization
(RMA) Number. This RMA number
should be clearly marked on the outside
of all package(s) and on the packing
list(s) accompanying the shipment. A
detailed account of the nature of the
problem(s) being experienced with the
equipment should also be included
inside the package(s) containing any
returned materials.
A Purchase Order, included with the
returned materials, will expedite the
turn-around of serviced equipment. It is
recommended to include authorization
on the Purchase Order for PCB to
proceed with any repairs, as long as
they do not exceed 50% of the
replacement cost of the returned
item(s). PCB will provide a price
quotation
or
replacement
recommendation for any item whose
repair costs would exceed 50% of
replacement cost, or any item that is not
economically feasible to repair. For
routine
calibration
services,
the
Purchase
Order
should
include
authorization to proceed and return at
current pricing, which can be obtained
from a factory customer service
representative.
Warranty – All equipment and repair
services provided by PCB Piezotronics,
Inc. are covered by a limited warranty
against
defective
material
and
workmanship for a period of one year
from date of original purchase. Contact
PCB for a complete statement of our
warranty. Expendable items, such as
batteries and mounting hardware, are
not covered by warranty. Mechanical
damage to equipment due to improper
use is not covered by warranty.
Electronic circuitry failure caused by the
introduction of unregulated or improper
excitation
power
or
electrostatic
discharge is not covered by warranty.
Contact Information – International
customers should direct all inquiries to
their local distributor or sales office. A
complete list of distributors and offices
can be found at www.pcb.com.
Customers within the United States may
contact their local sales representative
or
a
factory
customer
service
representative. A complete list of sales
representatives can be found at
www.pcb.com.
Toll-free
telephone
numbers for a factory customer service
representative,
in
the
division
responsible for this product, can be
found on the title page at the front of this
manual. Our ship to address and
general contact numbers are:
PCB Piezotronics, Inc.
3425 Walden Ave.
Depew, NY14043 USA
Toll-free: (800) 828-8840
24-hour SensorLineSM: (716) 684-0001
Website: www.pcb.com
E-mail: [email protected]
PCB工业监视和测量设备 - 中国RoHS2公布表
PCB Industrial Monitoring and Measuring Equipment - China RoHS 2 Disclosure Table
有害物质
镉
汞
铅 (Pb)
六价铬 (Cr(VI))
多溴联苯 (PBB)
多溴二苯醚 (PBDE)
部件名称
(Hg)
(Cd)
O
O
O
O
O
O
住房
X
O
O
O
O
O
PCB板
O
O
O
O
O
O
电气连接器
X
O
O
O
O
O
压电晶体
O
O
O
O
O
O
环氧
O
O
O
O
O
O
铁氟龙
O
O
O
O
O
O
电子
O
O
X
O
O
O
厚膜基板
O
O
O
O
O
O
电线
X
O
O
O
O
O
电缆
O
O
O
O
O
O
塑料
X
O
O
O
O
O
焊接
X
O
O
O
O
O
铜合金/黄铜
本表格依据 SJ/T 11364 的规定编制。
O: 表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。
X: 表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。
铅是欧洲RoHS指令2011/65/ EU附件三和附件四目前由于允许的豁免。
CHINA RoHS COMPLIANCE
Component Name
Hazardous Substances
Lead
(Pb)
Mercury
(Hg)
Cadmium
(Cd)
Chromium VI
Compounds
(Cr(VI))
Housing
O
O
O
PCB Board
X
O
O
Electrical
O
O
O
Connectors
Piezoelectric
X
O
O
Crystals
Epoxy
O
O
O
Teflon
O
O
O
Electronics
O
O
O
Thick Film
O
O
X
Substrate
Wires
O
O
O
Cables
X
O
O
Plastic
O
O
O
Solder
X
O
O
Copper Alloy/Brass
X
O
O
This table is prepared in accordance with the provisions of SJ/T 11364.
Polybrominated
Biphenyls
(PBB)
Polybrominated
Diphenyl
Ethers (PBDE)
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O: Indicates that said hazardous substance contained in all of the homogeneous materials for this part is below the limit
requirement of GB/T 26572.
X: Indicates that said hazardous substance contained in at least one of the homogeneous materials for this part is above
the limit requirement of GB/T 26572.
Lead is present due to allowed exemption in Annex III or Annex IV of the European RoHS Directive 2011/65/EU.
DOCUMENT NUMBER: 21354
DOCUMENT REVISION: C
ECN: 45605
SIGNAL CONDITIONER
Model 482C24
GENERAL OPERATION
MANUAL
For powering ICP® sensors and remote charge convertors, this signal conditioner provides an
effective method for managing small numbers of sensor channels. A simple command set, entered
through industry standard interface, allows the user to generate powerful application-specific
programs to automate system testing.
This manual describes the functions and features of model 482C24.
Manual Number: 63496
Manual Revision: A
ECO Number: 45494

PCB PIEZOTRONICS, INC. 3425 WALDEN AVENUE DEPEW, NY 14043-2495 PHONE 716-684-0001 FAX 716-684-0987
®
ICP is a registered trademark of PCB Group, Inc.
KS398
Table of Contents
Table of Contents
i
1-0
INTRODUCTION AND SPECIFICATIONS
1
1-1
Introduction: Safety Considerations
1
1-2
Model 482C24 System Description
2
1-2.1
Model 482C24 ICP® Input/ Output Mode
2
1-3
Block Diagram
3
1-4
Installation
3
1-4.1
Grounding Techniques
3
1-4.2
Quick Set-up Instructions
4
1-5
Operation: Standard AC Line
6
1-5.1
Using the Power Adapter
6
1-6
Maintenance and Repair
6
2-0
FRONT PANEL MODULE CONTROL
6
2-1
Introduction
6
2-2
Unit Initialization
7
2-3
Main Menu Format
7
2-4
Submenu Format and Command Selections
8
Reference
19
3-0
THEORY OF OPERATION
19
3-1
Sensor Excitation
19
3-2
Input Protection
20
3-3
Input Fault Detection
20
3-4
Input Interface
20
3-5
Gain
20
3-5.1
Programmable Gain
21
3-6
Normalized Output Sensitivity
21
3.7
Overload Detection and Autoscaling
21
3-7.1
Autoscaling
21
3-7.2
Overload
22
3-8
Connector Configuration
22
3-9
RS-232 Interface
22
3-10
Non-Volatile Memory
23
3-11
Transducer Electronic Data Sheet (TEDS) Interface
23
i
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
4-0
COMPUTER INTERFACE PROGRAMMING GUIDE
23
4-1
Introduction
23
4-2
RS-232
23
4-3
RS-232 Host Set-Up
23
4-4
RS-232 Rear Panel Pin out Listing
24
4-5
Ethernet Communication
24
4-6
Model 482C24 Communication Guidelines
24
4-7
Model 482C24 Unit Initialization Procedure
24
4-8
Command Summary
24
4-9
Command Format
25
4-10
Commands
26
GAIN
26
SENS
26
FSCI
27
FSCO
27
INPT
27
IEXC
28
FLTR
29
OFLT
29
CLMP
29
CPLG
30
AZZR
30
VEXC
30
CALB
31
RTED
31
WTED
32
ALLC
33
RBIA
33
CHRD
34
SWOT
34
STUS
34
UNIT
35
UNID
36
LEDS
36
ii
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
RSET
37
AUTR
37
SAVS
37
Communication Responses
38
Figure 1 Generic Block Diagram of series 482C ................................................3
®
Figure 2 ICP Sensor Excitation ........................................................................19
Figure 3 Input Fault Window Comparator with LED Indicator .......................20
Figure 4 Input Amplifier Configuration .............................................................20
Figure 5 Selectable Gain Amplifier Configuration ...........................................20
Figure 6 Autoscale/Overload Window Comparator ........................................22
Figure 7 RS-232 Configuration ..........................................................................22
iii
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
1-0.
INTRODUCTION AND SPECIFICATIONS
1-1.
Introduction: Safety Considerations
1
WARNING SYMBOLS AND TERMS
The following symbols and terms may be found on the equipment described in this manual.
This symbol on the unit indicates that the user should refer to the operating instructions located in the manual.
This symbol on the unit indicates that high voltage may be present. Use standard safety precautions to avoid
personal contact with this voltage.
This symbol indicates that the test fixture, Model 482C24, must be connected to earth ground via the power cord.
The WARNING heading used in this manual explains dangers that might result in personal injury or death. Always
read the associated information very carefully before performing the indicated procedure.
The Caution heading used in this manual explains hazards that could damage the instrument.
WARNING 1: The power supply/signal conditioner should not be opened by anyone other than qualified service
personnel. This product is intended for service by qualified personnel who recognize shock hazards and are familiar
with the safety precautions required to avoid injury.
WARNING 2: This equipment is designed with user safety in mind; however, the protection provided by the equipment
may be impaired if the equipment is used in a manner not specified by PCB Piezotronics, Inc.
Caution 1: Cables can kill your equipment. High voltage ElectroStatic Discharge (ESD) can damage electrical devices.
Similar to a capacitor, a cable can hold a charge caused by triboelectric transfer, such as that which occurs in the
following:
 Laying on and moving across a rug.
 Any movement through air.
 The action of rolling out a cable.
 Contact to a non-grounded person
The solution for product safety: 1) Connect the cables only with the AC power off. 2) Temporarily “short” the end of
the cable before attaching it to any signal input or output.
Caution 2: ESD considerations should be made prior to performing any internal adjustments on the equipment. Any
piece of electronic equipment is vulnerable to ESD when opened for adjustments. Internal adjustments should therefore
be done ONLY at an ESD-safe work area. Many products have ESD protection, but the level of protection may be
exceeded by extremely high voltage that is typically present in normal situations.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
2
EQUIPMENT RATINGS
For complete specifications, please refer to the enclosed Specification Sheet. This equipment operates optimally at +32
to +120°F (0 to +50°C), in an environment having <85% relative humidity. Its line power frequency range is 50/60 Hz.
482C24 requires 10-15 VDC with 500 mA to operate. In turn, it supplies 24 VDC, 2 to 20 mA excitation voltage to
connected ICP® or in-line charge converters sensors. The unit gets its power via AC power adaptor, 12 VDC battery
pack, 28 VDC or a car adapter which plugs into the receptacle on the rear panel.
1-2.
Model 482C24 System Description
Model 482C24 is a four-channel, bench top signal conditioner designed to interface measurement signals to readout or
recording devices. The unit provides 1 to 20 mA of constant current excitation to power ICP ® sensors and in-line charge
converters. Other features include incremental gain, AC/DC coupling, front panel keypad/display and the ability to read
and write TEDS (transducer electronic datasheet).
List of 482C24 features:
 ICP® and Voltage sensor input
 AC/DC coupling selectable per channel
 Auto zero function that negates DC bias
 Clamped output selectable per channel
 Incremental gain, x0.1 – x200
 Front panel keypad and display
 Capable of reading/writing binary data from/to TEDS devices
 RS-232 interface for computer control with supplied MCSC software
 12-bit accuracy signal conditioning
 Input fault and overload LED
 Variable ICP® source current, 0 to 20 mA per channel
 Illuminator lights and a power button on the front panel
 Rear panel BNC input/output connectors
 Non-Volatile Memory
1-2.1 Model 482C24 ICP® Input/ Output Mode
482C24 contains a regulated 24 VDC power supply that provides constant current for up to 4 individual channels. Both
the output and input connections utilize BNC connectors and are brought out through the rear panel.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
1-3.
3
Block Diagram
Figure 1 Generic block diagram of model series 482C signal conditioners (* = option)
1-4
Installation
Model 482C24 comes in the form of a standard box. The box should be located in such a way as to allow convenient
access to the power outlet for disconnect purposes. Since these units have low power consumption, they can be located
in confined environments.
1-4.1. Grounding Techniques
Integrating model 482C24 unit into an application that links the outputs to other test equipment powered by line voltages
may lead to errors or loss of signal-to-noise ratio due to ground loops. The evidence of ground loops is easily seen
whenever the fundamental frequency (50 or 60 Hz) or a multiple of the fundamental frequency is present in the system
when the sensors are “at rest.” In order to maintain the operating specification of noise and reduce the effects of line
interference, proper grounding techniques should be used. The following procedure may be helpful:
1. Make sure the signal ground lines of all equipment are tied together. The signal grounds of the channels are typically
tied together via the case of the input and output BNC connectors. The individual channels of 482C24 have their signal
ground line tied together internally at the power supply.
2. Insure that the sensor does not pick up line noise from the body under test. The case of the sensor should be isolated
from the body under test (ground) using an isolation pad. The isolation pad breaks the loop formed by the signal path of
the sensor to the 482C24 and the return (ground) from 482C24 back to the sensor.
3. Make sure that all equipment signal grounds of the test system are tied to the Earth ground at a single point and the
connections linking the equipment ground are made using a wire that can provide a very low impedance connection.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
4
1-4.2 Quick Set-up Instructions
1-4.2a Front Panel Introduction
The following illustration shows the front panel module as it appears on the Model 482C24 when initially
powered on.
PCB 482C24
FW Vnnn.n
This button is used to scroll DOWN through the options in the menus. In the submenus, this button can be used
to change the channel and increments.
This button is used to scroll UP through the options in the menus. In the submenus, this button can be used to
change the channel and increments.
This button moves you in the left / right direction through the menus and submenus.
ENTER: This button applies the setting of the option just set, while exiting the user out of the submenu.
Note: Please refer to section 1-4.1b and 1-4.2c for instructions on how to set the mode and gain options. The settings for
these options should be considered before unit is used to collect data
Note: In the submenus a flashing cursor represents a menu that will accept user input. A non- flashing cursor represents
a status menu, no input needed.
1-4.2b Mode Option
Model 482C24 includes two input modes – ICP® and Voltage. The factory default for all channels is ICP®. To change
the mode select the INPT option from the main menu use the down  arrow button to scroll down and the left / right
 button until the cursor is over INPT and the hit ENTER.
Gain
Sens
FSOT
FSIN
INPT
FLTi
A submenu will appear. Choose the channel you wish to change by using the up  or down  arrows. Once that is done
use the left / right  button to move the cursor over to the Input Type column. To change the mode, use either the up
 or down  arrow to scroll through the options. You can set the channel to be in either ICP  or voltage mode. Once you
have it set, you can either scroll back to the channel column; to change the mode on another channel; or hit ENTER to
save the changes.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
5
Example: If you want to change channel 2 to be in Voltage mode you would perform the following steps:
Scroll and select INPT from the main menu, and hit enter. Once in the submenu, the flashing cursor will be in the
channel column, hit the up  arrow button until the channel column reads 2
Chan
Input Type
2
ICP
Hit the left / right  arrow key once so that the cursor is over the Mode column. Use the up  or down  arrow keys
until the mode says Voltage.
Chan
Input Type
2
VOLTAGE
Once you have hit enter, your changes will be saved.
NOTE: To make a global change (set all the channels to the same mode) set the channel to ALL.
1-4.2c Programmable Gain Option
To enter the submenu for the variable gain option, place the cursor over the word “Gain” in the main menu. This is
shown as:
Gain
Sens
FSOT
FSIN
INPT
FLTi
By pressing the ENTER button, the submenu for changing the gain of any channel appears on the display. The submenu
pertaining to the “Gain” selection appears as:
Channel
Gain
1
001.0
Example: To set the gain of Channel 2 to x10, perform the following steps:
The flashing cursor appears over the channel selection. Choose the channel you wish to change by using the up or 
arrows. Once you have selected the channel, use the left/right  arrow key to move the flashing cursor over to the
gain column.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
Channel
Gain
2
001.0
6
To change the gain, use the up  and down  arrow keys to scroll through the values. Model 482C24 has incremental
gain selectable from .1 to 200.0. Use the left/right  arrow key to move the flashing cursor over any digit in the gain
column to select an appropriate value.
In this example, a gain of 10 is selected; (see example below). As with all setting changes, the actual gain internal to the
unit is changed when the ‘ENTER’ button is pushed.
Channel
Gain
2
010.00
To set the next channel, press the left right  arrow key to resume channel control, then press the up or down 
arrow keys to select a different channel. Continue making selections with the directional keys until all desired channels
are set, then press the ENTER key to return to the option menu.
Note: To make a global change (set all the channels to the same gain) set the channel to ALL.
1-5.
Operation: Standard AC Line
Plug the adapter into any 100 - 240 VAC 47 - 63 Hz power source, attach the supplied ferrite clamp on the AC cord to
ensure CE conformance. The ferrite clamp should be placed as close to the signal conditioner as possible. Press the
“ON/OFF” button to turn the unit on.
1-5.1 Using the Power Adapter
When using a power adapter to power the unit, make sure to observe the correct pin out, as indicated on the rear panel of
the unit.
CAUTION: Refer to the rear panel for proper input voltage and currents.
1-6.
Maintenance and Repair
It is not recommended that the customer attempt repair of the Model 482C in the field. Should trouble occur,
contact the factory for assistance. If the unit becomes dusty and dirty, it may be wiped off with a soft cloth.
2-0
2-1
FRONT PANEL MODULE CONTROL
Introduction
Model 482C24 is equipped with the capability of controlling functions through the front panel module. This module
consists of a display and five (5) push buttons. The display shows various menus in which all of the available options are
given. The user may scroll through the menu, and choose any option to change the settings.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
2-2
7
Unit Initialization
Upon pressing the ON/OFF button, the unit will turn on and display the following:
PCB 482C24
FW Vnnn.n
The unit is initialized, with the factory default settings.
The factory defaults are:
 Gain = 1.0
 Sensitivity = 10.0
 Full Scale input = 1000.0
 Full Scale output = 10.0
 Input Mode = ICP
 Input Filter = Disabled
 Current excitation = 4.0 mA
 Output Filter = Disabled
 Coupling = AC
 Clamp = OFF
2-3
Main Menu Format
Initially, pressing any button will cause the first two menu lines to be displayed and the cursor will blink on the ‘Gain’
option.
GAIN
SENS
INPT
FSOT
FSIN
FLTi
The cursor may be moved around the main menu by using the arrow keys. To show the other selections of the main
menu, press the down  or up ↑ arrow key. This action scrolls vertically to the subsequent lines on the menu. The
additional menu lines that can be selected from are shown below.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
SWOT CLMP
2-4
8
Bias
CHRD
Cal
LEDS
Ver?
Unit
Reset
Disp
Savs
Res
Submenu Format and Command Selections
1) Gain Options:
The 482C24 includes the incremental gain which provides has the ability to automatically adjust the gain of each
channel based on three other channel values. These values are; the Sensitivity of the sensor, the Full Scale value of the
input (FSI) in engineering units (g’s for instance), and the Full Scale Output (FSO) of the amplifier expressed in Volts
(this is the output that a signal at an FSI level will produce). The amplifier will always force the gain equation to be true
by adjusting either the gain, if one of FSI, FSO or SENS changes, or FSI if the Gain is set directly. The Gain equation is
as follows:
Gain = (FSO *1000) / (FSI*SENS)
Gain Limits:
The 482C24 ICP® & Voltage input modes have a maximum gain of 200.
Setting the Gain:
To enter the submenu for the variable gain option, place the cursor over the word “GAIN” in the main menu. This is
shown as:
Gain
SENS
INPT
FSOT
FSIN
FLTi
By pressing the ENTER button, the submenu for changing the gain of any channel appears on the display. The submenu
pertaining to the “Gain” selection appears as:
Channel
Gain
1
0001.0
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
9
The flashing cursor appears over the channel selection. Choose the channel you wish to change by using the up or 
arrows. Once you have selected the channel, use the left/right  arrow key to move the flashing cursor over to the
gain column.
To change the gain, use the up  and down  arrow keys to scroll through the options. Model 482C24 has incremental
gain selectable from .1 to 200.0. Use the left/right  arrow key to move the flashing cursor over any digit in the gain
column to select an appropriate value. The actual gain internal to the unit is changed when the ‘ENTER’ button is
pushed.
To set the next channel, press the left/right ← → arrow key to resume channel control, then press the up  or down 
arrow key to select a different channel. Continue making selections with the directional keys until all desired channels
are set, then press the ENTER key to apply the settings and return to the option menu.
Note: To do a global change (set all the channels to the same gain) set the channel to ALL.
Note: If a certain gain value is desired and/or needed for an application, that gain value can be entered directly into the
signal conditioner through the GAIN menu. Sensitivity, Full Scale Output (FSO) and Full Scale Input (FSI) can/should
be used to set the gain of amplifier to obtain a normalized output.
Normalized Output Example: A full scale output of 5 volts is desired and a full scale input of 380 engineering units is
expected. The sensor sensitivity is 9.96 mV/g. These values should be entered into FSOT, FSIN and SENS respectively.
The gain will be automatically set to 1.3 to give a 5 volt full scale output based on the expected input and sensor
sensitivity.
2) Sensitivity Value:
Entering a Sensitivity value will cause the gain of the unit to be changed based on the equation shown above. Sensitivity
is set in the same way that the incremental gain value is set, using the left/right  arrow key to move the flashing
cursor over any digit in the SENS column to select an appropriate value. As with all setting changes, the actual gain
internal to the unit is changed when the ‘ENTER’ button is pushed.
GAIN
Sens
FSOT
FSIN
INPT
FLTi
The sub-menu of the “SENS” selection shows the current value for sensor sensitivity (assumed to be mV/EU):
Channel
SENS
2
00100.0000
3) Full Scale Input Value:
Entering a Full Scale Input value will cause the gain of the unit to be changed based on the gain equation shown
previously. The FSI value is set in the same way that the incremental gain value is set, using the left/right  arrow
key to move the flashing cursor over any digit in the FSIN column to select an appropriate value. As with all setting
changes, the actual gain internal to the unit is changed when the ‘ENTER’ button is pushed.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
GAIN
SENS
INPT
FSOT
FSIN
FLTi
10
The sub-menu of the “FSIN” selection shows the current value for Full Scale Input (assumed to be EU):
Channel
FS_IN
2
01000.000
4) Full Scale Output Value:
Entering a Full Scale Output value will cause the gain of the unit to be changed based on the equation shown previously.
The FSO value is set in the same way that the incremental gain value is set, using the left/right  arrow key to move
the flashing cursor over any digit in the FSOT column to select an appropriate value. As with all setting changes, the
actual gain internal to the unit is changed when the ‘ENTER’ button is pushed.
GAIN
SENS
INPT
FSOT
FSIN
FLTi
The sub-menu of the “FSOT” selection shows the current value for Full Scale Output in Volts. The range is 0.5 to 10.0
Channel
FSOT
2
10.0
5) Input Modes:
The 482C24 allows the user to switch between ICP  and Voltage input modes. The factory default for all channels is
ICP. To change the mode select the INPT option from the main menu using the left / right  arrow keys until the
cursor is over the INPT option, and then press the Enter button.
Gain
SENS
INPT
FSOT
FSOT
FLTi
The following submenu will appear. Choose the channel you wish to change by using the up  and down  arrow keys.
Next, use the left / right  arrow key to move the flashing cursor over to the Mode column. To change the INPT, use
either the up  or down  arrow key to scroll through the options, once you have the desired setting selected hit ENTER
to apply it.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
Chan
INPUT TYPE
2
ICP
11
Note: Setting a channel to Voltage Input will cause the ICP  current source for that channel to be turned off.
Conversely, If ICP is set from Voltage mode then the ICP current source will be set to 4mA.
6) Input filter option (not Standard on 482C24, contact the factory for options):
Each channel’s input filter setting can be set independently of the other channels. To change the Input Filter setting from
the main menu, use the left / right  arrow keys until the cursor is over the FLTi option, and then press the Enter
button.
GAIN
SENS
INPT
FSOT
FSIN
FLTi
The following submenu will appear. Choose the channel you wish to change by using the up  and down  arrow keys.
Next, use the left / right  arrow key to move the flashing cursor over to the INP Filter column. To change the Filter
setting, use either the up  or down  arrow key to select either ‘On’ or ‘Off’, once you have the desired setting selected
hit ENTER to apply it.
Chan
INP Filter
2
Off
7) Output filter option (not Standard on 482C24, contact the factory for options):
Each channel’s output filter setting can also be set independently of the other channels. To change the Output Filter
setting from the main menu, use the left / right  arrow keys until the cursor is over the FLTo option, and then press
the Enter button.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
The following submenu will appear. Choose the channel you wish to change by using the up  and down  arrow keys.
Next, use the left / right  arrow key to move the flashing cursor over to the Out Filter column. To change the Filter
setting, use either the up  or down  arrow key to select either ‘On-nn.nk’ or ‘Off’, once you have the desired setting
selected hit ENTER to apply it.
Note: the ON setting also indicates the filter corner, in kHz, implemented by the filter for the channel.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
Chan
Out Filter
2
ON-10.0k
12
8) ICP® Current Adjustment:
The current excitation value can be set from 0 – 20 mA. Where 0 = Off. To set the current excitation value, move the
cursor to the ‘EXCi’ location, as shown below.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
Pressing the ENTER button, will cause the following submenu to appear. The ICP  current may be altered by using the
up  or down  arrow keys.
Chan
ICP Current
4
02 mA
The 482C24 will turn off the current excitation signal if the unit is not in ICP  input mode and will not allow it to be set
unless it is in ICP mode. If a channel is selected from the Iexc menu that is inappropriate then NA will appear as shown
below in place of the ICP current settings. Also, because of this limitation, the ‘ALL’ channel selection is not allowed
for this setting.
Chan
ICP Current
2
NA
Note: The factory default setting for the ICP current is 4 mA.
9) Voltage Excitation:
Voltage excitation is not applicable to the 482C24. The ‘Option Not Installed’ message will appear if it is activated.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
10) Input Coupling:
482C24 includes AC/DC coupling selectable per channel. The AC coupled mode passes the signal through a DC
blocking capacitor or high pass filter to remove the sensor bias voltage. By moving the cursor on the ACDC location, the
display shows:
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
13
When the ENTER button is pressed, the submenu for the coupling options will include; AC, DC. The selection can be
changed by using the up  or down  buttons.
Chan
Coupling
1
DC
The coupling options are AC or DC. In DC coupling mode the Auto Zero function becomes available.
11) Auto Zero/Auto Balance:
Model 482C24 provides a function for automatically zeroing the channel output for any input type in DC coupling
mode. This function is not available when the channel is AC coupled. The Zero function disconnects the input and uses a
DAC to reduce the channel output to close to 0V.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
When the ENTER button is pressed, the submenu for the Zero options will include; Cancel, AUTOBAL,
AUTOZERO. The selection can be changed by using the up  or down  buttons.
Note: The Auto Balance function (AUTOBAL) is not applicable to the 482C24. It is a bridge input mode function
which is not supported on the 482C24. If selected an Input Mode error message will be displayed.
Chan
AUTOZERO
1
AUTOZERO
Note: If the zero function fails the message “Error Removing MainBd DC Offset” may be displayed. The function tries
to get the output level below 2mV for the 482C24.
12) Auto-Range:
The auto-range (also referred to as auto-scale) feature provides an automatic scaling of the output signal. Please refer to
section 3-7.1 for further description. With this command, the programmable gain is implemented to give 0.8 of the Full
Scale Output. The signals are checked internally using the onboard A/D. To use this feature, place the cursor over the
word “ARNG” on the display and press the enter key, the following submenu will appear.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
14
Use the up  or down  arrow keys to toggle between the ‘OFF’, ‘ON’, or ‘IMED’ options. Once you have set the Autoscale option, hit the ENTER key to return to the main menu. ON turns the auto scale function ON and it will continue
scaling the gain until it is manually turned off. The ‘IMED’ option runs through the auto-scale algorithm once and then
turns it off automatically.
Chan
Autoscale
2
Off
Note: Auto-scale option should NOT be left on while measurements are being taken. It is strictly to be used during the
setting of the gain, and then the option should be turned off.
13) Switched Output:
Switched Output is not applicable to the 482C24. The ‘This Option is Not Installed’ message will appear if it is
activated.
SWOT CLMP
CHRD
Cal
Bias
LEDS
14) Clamp:
482C24 includes a clamped output that is selectable per channel. It is selected by pressing the ENTER key on the front
panel when the cursor is located on the CLMP option.
SWOT CLMP
CHRD
Cal
Bias
LEDS
The following submenu will appear. Choose the channel you wish to change by using the up  and down  arrow keys.
Next, use the left / right  arrow key to move the flashing cursor over to the CLMP column. To change the clamp
setting, use either the up  or down  arrow key to select either ‘On’ or ‘Off’, once you have the desired setting selected
hit ENTER to apply it.
Chan
Clamp
1
On
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
15
Note: When Clamped, the conditioner is internally set to automatically keep pulsating output signals ground based
(within 20mV negative undershoot) and positively poled. This clamp is useful in stabilizing output signals when
interfacing with instrumentation that requires repetitive pulse train signals be ground based and of one polarity (usually
positive). When the output signal is not clamped, a repetitive pulse train will gradually drift downward and stabilize in
time with equal areas above and below signal ground.
15) Bias Measurement:
482C24 is capable of measuring the bias voltage present on each of its channels. By moving the cursor upon the “Bias”
location, the display appears as follows:
SWOT CLMP
CHRD
Cal
Bias
LEDS
Using the ENTER button, the submenu appears as shown in the following diagram. Choose the channel you wish to
change by using the up  and down  arrow keys. The bias reading for the channel will be displayed automatically when
the channel is selected.
Chan
Bias
2
0023.7
If unit had a short circuit, the bias voltage would be <2.0V. Proper bias voltage is between 2.0V and 22V. Anything over
22V would indicate an open circuit.
16) Channel Output Measurement:
The 482C24 is capable of digitizing the channel output and displaying it on the front panel. By moving the cursor upon
the “CHRD” location, the display appears as follows:
SWOT CLMP
CHRD
CAL
Bias
LEDS
Using the ENTER button, the submenu appears as shown in the following diagram. Choose the channel you wish to
change by using the up  and down  arrow keys. The output reading for the channel will be displayed automatically
when the channel is selected.
Chan
Output
1
005.3
17) Calibration:
The Cal option is not applicable to the 482C24. The ‘This Option is Not Installed’ message will appear if it is activated.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
CHRD
CAL
LEDS
Ver?
Unit
Reset
16
18) LED Test:
The testing of the front panel LEDs allows you to check whether or not they are functioning properly. To test them,
place the cursor over the word “LEDS” on the display and press enter.
CHRD
Cal
LEDS
Ver?
Unit
Reset
The screen shown below will be displayed:
LED
Test
CANCEL
Use the up or down arrow key to select ‘Execute’ or ‘Cancel’. Both options return control to the main menu. If ‘Execute’
is selected then the LED’s will blink 3 times if ‘Cancel’ is selected then no action is taken.
19) Firmware Version:
To determine the firmware version of the unit select the ‘Ver?’ menu option and hit enter.
CHRD
Cal
LEDS
Ver?
Unit
Reset
A screen similar to the one shown below will be displayed:
PCB 482C24
FW v4A2.5
20) Unit ID:
The Unit ID may be changed by pressing the ENTER key on the front panel when the cursor is located on the Unit
option.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
CHRD
Cal
LEDS
Ver?
Unit
Reset
17
The following submenu will appear. Use the up  or down  arrow key to change the Unit Id setting to a new value.
Once you have the desired setting selected hit ENTER to apply it.
Current Unit #
1
Note: Changing the Unit ID is only necessary if you have the Ethernet or RS-232 communication option installed and
you are communicating with more than one unit. If this is the case then all units in the network MUST have a unique ID.
Model 482C24 includes an RS-232 port.
21) Reset to Factory Default Settings:
The 482C24 reset capability provides a mechanism to reset the unit to its factory default settings. To do this select the
Reset option from the menu by placing the cursor over the Reset option and hitting enter.
CHRD
Cal
LEDS
Ver?
Unit
Reset
Pressing the ENTER brings up a submenu that allows the operator to continue by selecting ‘Execute’ or cancel the
function by selecting ‘Cancel’. Both options return control to the main menu. If ‘Execute’ is selected then the defaults
are restored.
Factory Defaults
Execute
22) Display Content Options:
The Display option allows the user to choose from 3 selections of front panel content. To enter this mode, place the
cursor over the Disp option and hit enter.
Ver?
Unit
Reset
Disp
Savs
Res
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
18
Pressing the ENTER brings up a submenu that allows the operator to continue by selecting either ‘Gain’, ‘Bias’ or
‘Output’. If ‘Gain’ is selected then each channel’s current Gain setting will be displayed on the 2 nd line of the front panel
display to the nearest integer. If the gain is greater than two significant digits then it is displayed in terms of thousands
(i.e. 100 = 0.1k, 200 = 0.2k). Additionally, directly above the Gain on the 1st line of the display will be up to 3
characters representing the channels input mode; ‘I’ for ICP®, or ‘V’ for Voltage. Next to the Input mode indicator is
the Input Filter setting; ‘*’ for On, blank for Off and ‘-‘ if the option is not installed. Next to the Input Filter indicator is
the Output Filter setting indication which has the same markings as the input filter.
Display Opts
Gain
Following is what the screen will look like if the Display was set to show ‘Gain’ and channel 1 has a gain of 100 and is
in ICP® mode with the input filter ‘On’ with no Output Filter option installed. Similarly, channel 2 has a gain of 200 and
is in ICP® mode with the input filter off; channel 3 has a gain of 1 and is in Voltage mode with an input filter enabled
and channel 4 has a gain of 10 and is in Voltage mode with the input filter off.
I*-
I-
0.1k 0.2k
V*-
V-
1
10
The ‘Bias” display option is the same as the Gain option except the channels bias reading replaces the Gain setting. Also
the Bias reading will be refreshed periodically.
Following is what the screen will look like if the Display was set to show ‘Bias’.
I*-
I-
V*-
V-
B14 B14 B24 B24
The ‘Output” display option is the same as the Bias option except the channels Output is digitized and displayed. As
with the Bias reading it will be refreshed periodically.
Following is what the screen will look like if the Display was set to show ‘Output’.
I*-
I-
V*-
V-
+0.0 9.9 +5.0 +1.0
Note: Due to the limited screen size values less than or equal to -9.9 are displayed as -9.9 and values greater than or
equal 9.9 are displayed as 9.9.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
19
23) Save Current Setting:
Activation of ‘Savs’ causes the current settings to be saved as the default settings and used when the unit is powered up
again. This command is useful for units without an on/off power button. For units with a power button the settings are
automatically saved when the unit is powered down using the button.
Ver?
Unit
Reset
Disp
Savs
Res
24) Reserved:
No operation. These menu items are reserved for future use.
Ver?
Unit
Reset
Disp
Savs
Res
Reference
3-0.
3-1.
THEORY OF OPERATION
Sensor Excitation
ICP® refers to a low output impedance voltage mode sensor combining an integrated circuit and a piezoelectric sensing
element in a single housing to provide a voltage output. This sensor is powered by a +24 VDC power supply having a
constant current, variable from 2 to 20 mA.
Sensor excitation occurs as the constant current of all channels are set. Model 482C24 allows the constant current to be
adjusted between 0 and 20 mA to provide the required excitation for most applications. Special situations, such as
driving extra-long cables (more than 1000 ft) with high frequency or fast rise time pulses, may require increasing the
drive current to 12 mA or higher.
®
Figure 2 ICP Sensor Excitation
When driving fast rise time pulses over long lines, system performances can be optimized by “tuning” the drive current
to the line; i.e. by finding the best current setting for the particular test of physical parameters. To determine the optimal
current setting, experiment with your particular test set up. To insure optimal accuracy in constant-current adjustment,
make sure all channels have sensors or simulated loads, similar to the one provided by model 401B04 sensor simulator,
consisting of a voltage amplifier similar to those found in ICP ® sensors.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
3-2.
20
Input Protection
The input section has protection to limit the amplitude of the incoming signal to within +24 volts to ground. Maximum
allowable input voltage without distortion is ±10 volts, relative to the sensor bias voltage.
3-3.
Input Fault Detection
Model 482C24 monitors two input fault conditions, “short” and “open,” which indicate problems with sensor input and
is displayed through the front panel LEDs. Either case implies that the sensor is NOT functioning properly. An input is
shorted when it has a ground path for the sensor excitation and open when the sensor fails to draw the excitation.
Two voltage comparators consist of a window comparator that has two reference voltages (V ref) representing thresholds
for “short” and “open.” When the sensor’s bias voltage (Vbias) exceeds the comparator range, the front panel input fault
LED lights.
Note: Red LED implies input fault.
Figure 3 Input Fault Window Comparator with LED Indicator
3-4.
Input Interface
The input signal conditioning for each channel provides a unity gain buffer with high-input impedance amplifiers. With
the AC coupled option it also eliminates the DC bias from the input signal with a 10-second time constant.
Figure 4 Input Amplifier Configuration
3-5.
Gain
The Programmable Gain Amplification (PGA) block consists of a decimal gain amplifier. See Figure 3-5.1.
Figure 5 Selectable Gain Amplifier Configuration
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
21
3-5.1 Programmable Gain
With programmable gain the user can adjust the gain as needed. Incremental is available gain on the 482C24 from 0.1 to
200. The incremental gain step is 0.1. Incremental gain is particularly useful in the standardization of groups of sensors.
Consider the following example, wherein the user desires to normalize sensitivities to 1 V/unit for each channel.
Channel
1st
2nd
3rd
Sensor Sensitivity
mV
10.10 /unit
mV
101.32 /unit
mV
22.30 /unit
Gain Setting of 482C
99.00
9.9
44.8
Actual Gain Needed
99.01
9.869
44.84
These results may be accomplished by using either of two techniques. First, the user may set the gain via the computer
interface command set (See the command strings in Section 4-9 in the Computer Interface Programming Guide) or the
user may set the gain by using the front panel control.
3-6.
Normalized Output Sensitivity
The definition of normalized output sensitivity is the calculation of the individual channel’s gain, depending on the
sensitivity of the sensor attached and the desired output sensitivity. This is simply a function of the desired output
sensitivity (in Volts/ unit) divided by the sensor’s sensitivity.
Gain =
1 Volt
/ Sensitivity (mV/unit)
Additionally, a feature to improve flexibility allows changing the output level to a value of 5 Volts/ unit instead of
normalized 1 Volt/ unit. Some users request the ability calculate the gain using a known input signal along with the
sensor sensitivity, and desired output level. The result of the request impacts the formula:
Gain =
1 Volt/
/ [Sensitivity (mV/unit) * Full Scale Input (units)]
Adding some simple error checking to insure the limits of the sensor and gain limits of the signal conditioner are not
exceeded completes the normalization process.
Gainnormalized =
FSOT (V)
/ SENS * FSIN
Additional Considerations:
The storage of individual channel gains is stored in non-volatile memory locations. The new variables for each channel’s
sensitivity, Full Scale Output level, and Full Scale Input are stored in non-volatile memory locations when the unit is
powered down.
The error checking should provide a flag if the desired normalized output level is not feasible due to gain limitations.
The gain required may be too large given the sensor sensitivity defined, or too small which implies the sensor will not be
capable measure the expected value. The typical sensor will output a signal up to 5 Volts. The maximum swing may be
used in the error checking.
3.7
Auto scaling and Overload Detection
3-7.1 Auto scaling
To avoid overload, model 482C24 features auto scaling for gain adjustment. It first sets maximum gain on all channels,
then decreases the gain setting of any channel on which an overload has occurred. The gain auto scale continues until
there is no overload with respect to the preset overload threshold level (standard ±10 volts) and sensed signal of the
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
22
channel. Final gain and overload status interrogation is possible through the command set. The correct procedure for
using the auto scale feature is as follows:
1.
2.
3.
4.
5.
6.
Excite the structure under test.
Enable auto scale (Auto scale on).
Wait several seconds, until the unit is stabilized.
Disable auto scale (Auto scale off).
Read the gains of all channels.
Begin test run.
3-7.2 Overload
The overload feature uses the same window comparator principle previously discussed. The +V ref is equal to the default
overload value of ±10 volts. When the input voltage (Vsignal of Figure 3-7.1) to the window comparator exceeds the
reference voltage limits, overload has occurred, and the comparator’s output, which is normally “high,” becomes “low.”
This “low” state illuminates the overload LED and triggers the latch of overload detection circuitry. During regular
measuring time, the latch holds the occurrence of overloads until the user reads its status through the computer interface.
Figure 6 Auto scale/Overload Window Comparator
3-8.
Connector Configuration
482C24 provides BNC inputs and outputs for ICP -type sensors.
Input/ Output Connector Definitions:
The BNC connectors are used to accept ICP  and Voltage mode input signals. The ICP excitation will be present on
the input BNC only when the ICP current is turned on. The voltage input mode allows bipolar, positive and negative
(above and below ground) signals. In all input modes, the signal must be AC type signals, unless the DC coupling option
is turned on.
3-9.
RS-232 Interface
Figure 7 RS-232 Configuration
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
23
The RS-232 Interface provides serial control of 482C24. This may be accomplished through the use of a personal
computer, dumb terminal, or handheld controller. The command format is based upon letter representations of the
controllable options. This serial interface, set-up, and programming are described in Section 4.
3-10
Non-Volatile Memory
This feature keeps the programmed configurations stored when the unit is powered down. When the unit is turned on,
all programmable features (e.g., gains, input mode) active at last use are preserved. When the unit is powered down the
non-volatile memory is updated with the current channel settings. The unit’s non-volatile memory may be reset to the
factory default settings by using the reset menu option.
3-11
Transducer Electronic Data Sheet (TEDS) Interface
The TEDS sensors attach to the input connectors the same way a traditional ICP sensor is attached to the 482C24. The
TEDS interface requires both the RS-232 or Ethernet computer interface option, and the input mode option. The digital
control and input mode features automatically perform the TEDS read or write function. After the communication with
the TEDS sensor is complete the input mode returns to the input mode (charge or ICP ) prior to the communication.
The current TEDS function will perform a read of the “raw” TEDS data and return the 32 bytes of TEDS sensor
EEPROM data and the 8 byte Application register contents, if it was programmed, and returns the data in an ASCII Hex
representation. This raw data may be decoded using PCB’s Multi-Channel signal conditioner software (PN EE75).
4-0.
COMPUTER INTERFACE PROGRAMMING GUIDE
For RS-232 or Ethernet equipped units (482C24 includes an RS-232 interface)
4-1.
Introduction
Individual commands are subject to feature availability on the particular unit. The RS-232 Interface enables the
482C24to be fully controlled by a computer or handheld controller. With this interface, the unit is able to become part
of a fully automated system.
4-2
RS-232
The RS-232 provides total control of the unit except for hardware RESET. The rest of the options described previously
are computer-controllable.
4-3.
RS-232 Host Set-Up
Before any serial interface is used to communicate with the host computer, a specific set-up must be followed. These
parameters must be set for the host computer. The full list of parameters is shown below: (EOL = End of Line.)
Parameter
Transmission Rate
Parity
Number of data bits
Number of stop bits
Handshaking
Echo
Transmit EOL
Receive EOL
Setting
19,200 BPS (bits per second)
None
8
1
None
None
Carriage Return and Line Feed, <CR><LF>
Carriage Return and Line Feed, <CR><LF>
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
4-4.
RS-232 Rear Panel Pin out Listing
Number of 9-Pin Connector
1
2
3
4
5
6
7
8
9
4-5.
24
Function
N.C.
TXD
RXD
N.C.
Ground
N.C.
N.C.
N.C.
N.C.
Notes
Not Connected
From 482C
To 482C
Not Connected
Ground
Not Connected
Not Connected
Not Connected
Not Connected
Ethernet Communication
The 482C24 does not provide Ethernet communication.
4-6.
Model 482C24 Communication Guidelines
1) Data transfer from the host terminal to the unit must contain an ending delimiter of <CR><LF>.
Example:
<CR><LF>
-Carriage Return and Line feed. (In ASCII,
<CR> is 13; <LF> is 10.)
2) The number of characters for any command string, from the first character to the <CR>, may not exceed 255.
3) Status request commands, i.e., commands ending with a “?”, may only be sent within one transmission.
Example:
7:0:GAIN?<CR> <LF>
-Reads the gain setting of all channels.
4-7.
Model 482C24 Unit Initialization Procedure
1) To begin, plug 9-pin female DSUB connector of given cable into RS-232 port of model 482C24. Plug the other end
of the cable into the COM port of the computer.
2) Turn on power to the unit. The display or power indicator should light up to indicate the power is on.
3) With a computer that is set up to transmit data, according to the host set-up discussed in Section 3-3, send the
command:
“1:0:LEDS=0” <CR><LF>
This command flashes the front panel LEDs three times.
4-8.
Command Summary
The table below is a summary of the 482C24 command set. The 482C series is highly differentiated and some
commands may not be valid in all units. The 482C commands are sent and received from/to the host computer in ASCII
text format.
Command
GAIN
SENS
FSCI
Type
R/W
R/W
R/W
Scope
Channel
Channel
Channel
Meaning
Set or read gain
Sensor Sensitivity
Expected Full Scale Input Value
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
FSCO
INPT
IEXC
FLTR
OFLT
CLMP
CPLG
CALB
SWOT
RTED
WTED
ALLC
RBIA
STUS
UNIT
CHRD
UNID
LEDS
RSET
AUTR
SAVS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
W
R
R
R
R
R
R/W
FCN
FCN
FCN
FCN
Channel
Channel
Channel
Channel
Channel
Channel
Channel
Channel
Unit
Channel
Channel
Channel
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Channel
Unit
25
Full Scale Output
Input Signal Mode Selection
Read/Adjust ICP current setting
Enable/disable input filters
Enable/disable output filters
Enable/disable Clamp
Select AC or DC coupling
Select Internal or External Cal setting
Switched output (4 to 1 mux)
Read binary TEDS data from a sensor
Write binary TEDS data to a sensor
Read most channel settings
Measure Bias (returns all channels)
input fault / overload status, for all channels
Read Unit Configuration information
Read Channel output (returns all channels)
Set Unit ID
Front panel LED test function
Restores factory default channel settings
Enable/disable auto-scaling function
Saves the current settings to NVRAM
Command type definitions;
 R/W – the setting can be read from or written to the unit or channel.
 R – The information can only be read from the unit or channel.
 FCN – The command invokes a function in the unit.
4-9.
Command Format
The 482C24 communication protocol incorporates the concept of 'Directed' and 'Global' commands at both the Unit and
Channel level with the following characteristics;
 Unit or Channel numbers =0 are global commands that affect either all units or all channels of a particular unit
or both.
 Directed commands that set a unit parameter are always acknowledged (ACK) with an ASCII message that
indicates '<Unit#>:<CMD>:ok’ if implemented with no errors or NAK with; <Unit#>:<CMD>:=<error#>’ if
an error was encountered.
 Directed commands that request a particular parameters setting (query) result in a query response being
returned
 No response is ever given to a Global Unit command.
Command Format:
'Unit#:Ch#:Cmd[=|?]{<value1 >{,< value2 >}}{;Ch#:Cmd[=|?]{<value1>{,< value2>}}}\n\r





Each message must be preceded by a Unit# & Channel# (both of which could be 0)
Messages may contain multiple commands separated by a semicolon ‘;’.
The second and subsequent commands in a message shall not contain a unit number but shall contain a channel
number.
Each command in a message will evoke a response message if one is warranted (not global)
Query’s ('?') can only be directed to one unit but if the channel=0 then each channel's setting will be returned in
the order 0-MAXCHANNELS separated by a ':'
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
26
Command examples:
1:0:GAIN=100.2\r\n
1:1:GAIN=100.2;2:GAIN=120.3\r\n
1:3:GAIN=100.2;0:FLTR=1\r\n
unit 1,all channels gain set to 100.2
unit 1, channel 1 gain = 100.2; channel 2 gain = 120.3
unit 1, channel 3 gain = 100.2; all channel’s filter = ON
General Query Response Format
Unit#:Cmd:Ch#=<value>{; Ch#=<value>}…>{; Ch#=<value>}…\r\n
Responses to a query with a channel number=0 will return the setting of each channel in a list separated by
semicolons ‘;’.
If the target of the query is a unit setting (ex. current excitation) then the channel number returned is the 1 st
channel of the board that processed the command.
4-10. Commands
GAIN
SET GAIN: This command sets the programmable gain of a channel. The gain may be set to any setting within the 0.1
to 200 range for the incremental option included on 482C24.
Setting:
The amplifier gain can be set directly by sending a Gain command:
1:0:GAIN=100.2\r\n (unit 1,all channels gain set to 100.2)
When a channels gain is set directly the unit will adjust the FSI parameter of the gain equation using the
following equation; FSI = (((FSO*1000)/Gain)/Sens) to ensure it remains valid.
Setting Response: 1:GAIN:ok
Query:
The Gain query returns all of the parameters used to determine it in a single response
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:=Gain:SENS:FSO:FSI;
Query: 1:5:GAIN?
Response: 1:GAIN:5= 5.0: 10.0: 10.0: 200.0;
Global Gain Query: 1:0:GAIN?
Global Gain Response: 1:GAIN:1= 5.0: 10.0: 10.0: 200.0;2=
10.0: 10.0: 200.0;4= 5.0: 10.0: 10.0: 200.0;
5.0: 10.0: 10.0: 200.0;3=
5.0:
SENS
The SENS command provides a mechanism to have the transducer Sensitivity influence the Gain setting of the channel.
Channel Gain is calculated using the equation;
Gain = FSO*1000/(FSI*SENS). If a Sensitivity is entered that caused the gain to exceed the amplifiers capability the
FSI component will be adjusted to keep the equation valid.
Setting:
1:0:SENS=20.2\r\n
Setting Response: 1:SENS:ok
(unit 1,all channels transducer sensitivity set to 20.2)
Query:
The Sens query returns the channels transducer sensitivity
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
27
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= SENS;
Query: 1:1:SENS?
Response: 1:SENS:1= 6.0;
Global Sens Query: 1:0:SENS?
Global Sens Response: 1:SENS:1= 6.0;2= 10.0;3= 10.0;4= 10.0;
FSCI
The FSCI command provides a scaling mechanism to automatically set the gain based on a known input level (in EU)
and what output level (in Volts) you would like that Full Scale input level to be represented by. For instance 1000g’s =
10Volts. These 2 values along with the transducer sensitivity set the gain. Channel Gain is calculated using the equation:
Gain = FSO*1000/(FSI*SENS).
Setting:
1:1:FSCI=1000.000\r\n (unit 1, channel 1 FSI set to 1000.0)
Setting Response: 1:FSCI:ok
Query:
The FSCI query returns the channels Full Scale Input value in engineering units
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <fsci>;
Query: 1:1: FSCI?
Response: 1:FSCI:1=1000.0;
Global FSCI Query: 1:0:FSCI?
Global FSCI Response: 1:FSCI:1=1000.0;2=1000.0;3=1000.0;4=1000.0;
FSCO
The FSCO command provides a scaling mechanism to automatically set the gain based on a known input level (in EU)
and what output level (in Volts) you would like that Full Scale input level to be represented by. For instance 1000g’s =
10Volts. These 2 values along with the transducer sensitivity set the gain. Channel Gain is calculated using the equation:
Gain = FSO*1000/(FSI*SENS).
Setting:
1:1:FSCO=10.000\r\n
(unit 1, channel 1 FSI set to 10.0)
Setting Response: 1:FSCO:ok
Query:
The FSCO query returns the channels Full Scale Output Value in volts
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <fsci>;
Query: 1:1: FSCO?
Response: 1:FSCO:1=10.0;
Global FSCO Query: 1:0:FSCO?
Global FSCO Response: 1:FSCO:1=10.0;2=10.0;3=10.0;4=10.0;
INPT
The INPT command sets the input mode for a given channel. The mode selection is sent as an integer value. The
possible input modes and their associated values are:
 CHARGE
0
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL













VOLTAGE
ICP®
Multi-Charge option of 10mV/pc sensitivity
Multi-Charge option of 1.0mV/pc sensitivity
Multi-Charge option of 0.1mV/pc sensitivity
Isolated ICP©
Isolated Multi-Charge option of 10mV/pc sensitivity
Isolated Multi-Charge option of 1.0mV/pc sensitivity
Isolated Multi-Charge option of 0.1mV/pc sensitivity
¼ Bridge
½ Bridge
Full Bridge
Referenced Single Ended
28
1
2
3
4
5
6
7
8
9
10
11
12
13
NOTE: Not all input options are valid for all 482C models. Check the model specification for applicable
input modes.
Setting:
1:1:INPT= 2\r\n (unit 1, channel 1 input mode set to ICP)
Setting Response: 1:INPT:ok
Query:
The INPT query returns the channels input mode selection
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <inpt>;
Query: 1:1:INPT?
Response: 1:INPT:1= 2;
Global INPT Query: 1:0:INPT?
Global INPT Response: 1:INPT:1= 2.0;2= 2.0;3= 2.0;4= 2.0;
IEXC
The IEXC command sets the current excitation level for ICP® mode. If the channel was in Voltage mode and this value
gets set > 0, then the channel’s input mode will switch to ICP® mode. Likewise if the channel is in ICP® mode and
current excitation is turned off (0) then the channel input mode changes to Voltage. The current excitation value is sent
as an integer value from 0 (off) to 20mA.
Setting:
1:1:IEXC= 4\r\n (unit 1, channel 1 set to 4mA)
Setting Response: 1:IEXC:ok
Query:
The IEXC query returns the units excitation value.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <IEXC>;
Query: 1:2:IEXC?
Response: 1:IEXC:2=4;.
Global IEXC Query: 1:0: IEXC?
Global IEXC Response: 1:IEXC:1=4;
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
FLTR
The FLTR command enables or disables the Input Filter.
The Input Filter value is sent as an integer value of either 0 -Disable or 1-Enable.
Setting:
2:1:FLTR= 1\r\n ( unit 2, channel 1, Input Filter Enabled )
Setting Response: 2: FLTR:ok
Query:
The FLTR query returns the channels Input Filter selection
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <0|1>;
Query: 2:1: FLTR?
Response: 2:FLTR:1=1;
Global FLTR Query: 1:0: FLTR?
Global FLTR Response: 1:FLTR:1=1;2=0;3=0;4=0;
OFLT
The OFLT command enables or disables the Output Filter.
The Output Filter value is sent as an integer value of either 0 -Disable or 1-Enable.
Setting:
2:1:OFLT= 1\r\n ( unit 2, channel 1, Output Filter Enabled )
Setting Response: 2: OFLT:ok
Query:
The FLTR query returns the channels Output Filter.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <0|1>;
Query: 2:1: OFLT?
Response: 2: OFLT:1=1;
Global OFLT Query: 1:0: OFLT?
Global OFLT Response: 1: OFLT:1=1;2=0;3=0;4=0;
CLMP
The CLMP command enables or disables the Clamp feature. When Clamp is disabled the channel is ‘Buffered’
The Clamp value is sent as an integer value of either 0 –Disable (buffered) or 1-Enable.
Setting:
2:1:CLMP= 1\r\n
Setting Response: 2: CLMP:ok
( unit 2, channel 1, Clamp Enabled )
Query:
The CLMP query returns the channels Clamp setting.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <0|1>;
Query: 1:1:CLMP?
Response: 1:CLMP:1=0;
29
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
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Global CLMP Query: 1:0:CLMP?
Global CLMP Response: 1:CLMP:1=0;2=0;3=0;4=0;
CPLG
The CPLG command sets the channel coupling to AC or DC mode.
The DC coupling option will attempt to remove a DC offset from the input signal by reading the bias and using an
internal DAC to zero it. This function will be performed when the setting is changed from AC to DC.
The coupling value is sent as an integer value: 0 –AC, 1-DC.
Setting:
1:1:CPLG= 1\r\n ( unit 1, channel 1, DC Coupled )
Setting Response: 1: CPLG:ok
Query:
The CPLG query returns the channels coupling setting.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <0|1>;
Query: 1:1:CPLG?
Response: 1: CPLG:1=0;
Global CPLG Query: 1:0: CPLG?
Global CPLG Response: 1: CPLG:1=0;2=0;3=0;4=0;
AZZR
The AZZR command is used to Auto Zero (input shorted) or Auto Balance (input connected) a channel that is DC
coupled. This command invokes a function and therefore has no query capability. The function parameters are: 1=Auto
Zero, 2=Auto Balance. (Auto Balance is only valid if the channel has a bridge input type selected).
Setting:
2:1:AZZR= 1\r\n ( unit 2, channel 1, Auto Zero)
Setting Response: 2:AZZR:ok
Query:
N/A
VEXC
The VEXC command sets the voltage excitation level for bridge and differential mode inputs.
The voltage excitation value is sent as a floating point number from 0.0 (off) to ±12.0 Volts. If the value is sent as a
negative number then the minus (-) Bridge Excitation will track the plus (+) Bridge Excitation setting. If it is sent as a
Positive value then the minus (-) Bridge Excitation will be set to 0.
Setting:
1:1:VEXC= -10.0 \r\n
(unit 1, channel 1, sets minus (-) Bridge Excitation and plus (+)Bridge
Excitation to 10.0 volts – Bi-Polar)
1:1:VEXC= 10.0 \r\n
(unit 1, channel 1, sets minus (-) Bridge Excitation to 0 and plus (+)Bridge
Excitation to 10.0 volts – Uni-Polar)
Setting Response: 1:VEXC:ok
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
31
Query:
The VEXC query returns the voltage excitation value.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <VEXC>;
Query: 1:1:VEXC?
Response: 1:VEXC:1=-10.0;
Global Query: 1:0: VEXC?
Global Response: 1:VEXC:1=-10.0;2=10.0;3=0.0;4=0.0;
CALB
The Calibration mode (CALB) command selects the calibration setting. For the bridge input 482C27 the options are
OFF, Internal Shunt +, or Internal Shunt -. For other models that support calibration signal output, Internal Cal using
internally generated 100 Hz or 1 kHz sine wave signals and External Cal are available.
The CALB value is sent as an integer value of either 0 –Disable, 1-1000 Hz Enable, 2-100 Hz Enable, 3External Cal, 4 -Internal Shunt +, or 5 – Internal Shunt -.
Setting:
1:1: CALB= 4\r\n
Setting Response: 1:CALB:ok
( unit 1, channel 1, Internal Shunt Cal + )
Query:
The CALB query returns the channels calibration setting.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <0|1>;
Query: 1:1: CALB?
Response: 1: CALB:1=4;
Global Query: 1:0:CALB?
Global Response: 1:CALB:1=4;2=0;3=0;4=0;
RTED
The RTED query returns the TEDS information that is stored in the EEPROM of a memory chip in the sensor or other,
TEDS capable, in-line module attached to a specific channel. Following is a list of recognized TEDS chips that can be
read with the RTED command;
DS2430A
DS2431
DS2433
DS28EC20
FC= 0x14
FC= 0x2D
FC= 0x23
FC= 0x43
1 page
4 Pages
16 Pages
80 Pages
Plus an 8 byte Application register
This command will also read the Application Register Status of a DS2430A chip, if one is encountered, to see if it
indicates the 64 bit Application Register has data in it. If so it will read the Application register contents and return it
followed by the contents of the TEDS EEPROM.
The RTED command requires a page number parameter for chips larger than 128 bytes (e.g.DS2433 & DS28EC20).
The page numbers must be expressed as two decimal characters starting at 00 and be appended to the end of the
command after the ‘?’. However, in order to be backwards compatible, the page number is only used if the chip is
DS2433 or DS28EC20, it is not necessary for DS2430A or DS2431 chips.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
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NOTE: The 1st byte of the DS2430A EEPROM data should contain the checksum of both the Application Register
contents and the EEPROM contents if the TEDS is 1451.4 compliant. Additionally, for the larger capacity chips that do
not have an application register the 1st byte should contain the CS of that page.
No attempt is made to validate or interpret TEDS data with this command.
Setting:
N/A – Command is Read only (the WTED command writes TEDS data)
Query:
The RTED command query returns the TEDS data associated with the specified channel. This command must
be directed to a specific channel. The RTED response varies depending on the chip encountered:
DS2430A:
The 1st byte of the response will return an indicator (0 or 1) that specifies if the DS2430A
Application register has been used to store the basic TEDS data (1) and up to 40 bytes in ASCII Hex format (8
bytes of Application register content if it contained data and 32 bytes of the EEPROM content).
DS2431:
The response will return the Family code 45(decimal) followed by 128 bytes of EEPROM
data (4 pages of 32 bytes each) in 2 character hex notation.
DS2433 or DS28EC20: The response will return the appropriate family code followed by the specified page of
EEPROM data – 32 bytes in in 2 character hex notation.
Query Format: Unit#:Ch#:CMD?<Page>
Response format: <Unit#>:RTED:<Ch#>= <APP Reg Status or Family code in decimal>:<APP Reg
Contents (8 hex bytes if APP Reg Status=1)><DS2430A EEPROM Contents (32 hex bytes)>
Where: APP Reg Status for a DS2430 chip=1 if the APP Register had data or 0 if it did not. For all
other chips this value is the Family Code of the chip which should be used to read the appropriate
number of pages from the chip. (If value=0 or 1 then assume FC =0x14).
Query example 1: 1:2:RTED?00 ;read teds on channel 2 starting at the 1st page (0))
Response: (for a DS2430A TEDS chip on channel 2 with valid app register data)
1:RTED:2=1:168010a0097500008e64d059e6a427204aa7394a0a73215aa06d01903f97e6b7dcf9bc02
40000000
Query example 2: 1:1:RTED?00
Response example 2: Teds read on a sensor with a DS2431 chip (Family code 45 (0x2D) is the 1st
item after the ‘=’ in the response separated from the memory contents with a ‘:’. It will return all 4
pages of a DS2431 chip with 1 read command
1:RTED:1=45:12174053a059580900648019d89ae8e112801f1100e02e5aa068c187c76433da4e372c1
e93cb6610159d9e83d2735018449cca68b318000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000\r\n
WTED
The WTED command writes a string of bytes to the EEPROM memory of a TEDS capable chip, contained in a sensor
or inline module, attached to the specified channel. The command can transfer up to 1 page, 32 bytes, and the contents
of an application register, 8 bytes, if one exists (DS2430A only if it is not locked). Following is a list of Maxim TEDS
chips that can be written to with the WTED command;
DS2430A
DS2431
DS2433
DS28EC20
FC= 0x14
FC= 0x2D
FC= 0x23
FC= 0x43
1 Page
4 Pages
16 Pages
80 Pages
Plus an 8 byte Application Register
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
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The WTED command requires a page number parameter, for all chips, to identify which page will receive the data. Page
numbering starts at 0.
NOTE: No attempt is made to validate or interpret TEDS data with this command, it just writes bytes.
Setting:
1:1:WTED=36:0:0:43:23:64:83:160:89:88:9:0:100:128:25:216:154:232:225:18:128:31:17:0:224:46:90:
160:104:161:142:199:100:51:218:36
Command interpretation:
<Unit Id>:<Channel Id>: WTED=<TEDS data to write> with the following format.
Note: all values are decimal.
B0 – Message Length - Total bytes in message including this byte.
B1 - 1st 8 bytes go in Application Register? 0=FALSE | 1=TRUE
B2 – Page Number (0 for DS2430A | 0-3 for DS2431 | 0-15 for DS2433 | 0-79 for DS28EC20
B3 - Bn-1 TEDS page content (up to 40 bytes - 8 app register bytes plus 32 EEPROM bytes)
Bn – Checksum (Simple checksum of all bytes – least significant byte of 16 bit summation)
In the example above, the summation of 36...218 = 3364 = 0xD24; LSB=0x24=36 decimal
Setting Response: 1:WTED:ok
Query:
Use the RTED command to query TEDS data
ALLC
The ALLC command is used to read several channel settings at once.
Setting:
N/A – Command is Read only
Query:
This command must be a directed command use of the global channel indicator is not allowed.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= GAIN:<Gain value>; SENS:< SENS value>; FSCI:< FSCI
value>; FSCO:< FSCO value>; INPT:< INPT value>; FLTR:< FLTR value>; IEXC:< IEXC value>;
OFLT:< OFLT value>; CPLG:< CPLG value>; CLMP:< CLMP value>; CALB:< CALB value>;
VEXC:< VEXC value>; SWOT < SWOT value>
Query: 1:1:ALLC?
Response:1:ALLC:1=GAIN 1.0; SENS:10.0; FSCI:1000.0; FSCO:10.0; INPT:2.0; FLTR:0; IEXC:4;
OFLT:0; CPLG:0; CLMP:0;CALB:0; VEXC: 0.0; SWOT:0;
RBIA
The RBIA command is used to read all channels Bias Levels.
Setting:
N/A – Command is Read only
Query:
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
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This command is a global command and will return all channel bias readings regardless of the channel id in the
command.
Query Format: Unit#:Ch#:RBIA?
Response format: Unit#:Cmd:Ch#:=CH1 bias;… CHn#:=CHn bias;
Query: 1:1:RBIA?
Query Response: 1:RBIA:1= 25.5;2= 25.5;3= 25.5;4= 25.5;
CHRD
The CHRD command is used to read all channels output levels.
Setting:
N/A – Command is Read only
Query:
This command is a global command and will return all channel A/D readings regardless of the channel id in the
command.
Query Format: Unit#:Ch#:CHRD?
Response format: Unit#:Cmd:Ch#:=CH1 A/D;… CHn#:=CHn A/D;
Query: 1:0:CHRD?
Query Response 1:CHRD:1= 4.049;2=5.338;3=2.137;4=10.373;
SWOT
The Switched Output (SWOT) command selects which channel is switched to the switched output BNC for monitoring
purposes as well as its normal analog output. This is a unit command so the channel designation in the command
protocol is ignored
The switched output value is sent as an integer value: 0-OFF; or 1-MAX Channels to designate which channel
is switched.
Setting:
1:0:SWOT= 4\r\n
Setting Response: 1: SWOT:ok
( unit 1, channel NA, Channel 4 is switched to the switched output BNC )
Query:
The SWOT query returns all channels coupling setting.
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= <channel # or 0=OFF>;
Query: 1:1:SWOT?
Response: 1:SWOT:1=4;
STUS
The STUS command is used to read the unit and all channel status indicators.
Setting:
N/A – Command is Read only
Query:
This command is a global command and will return all channel bias readings regardless of the channel id in the
command.
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
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Query Format: Unit#:Ch#:STUS?
Response format: Unit#:Cmd:Ch#:<unit status bit map>;<CH1 status bit map>;…;<CHn status bit
map>;
Query: 1:1:STUS?
Query Response: 1:STUS:1:0;1;5;5;5;
Where :
Unit Bit 0 = 1= BAD EEPROM read for channel settings on power up
Unit Bit 1 = 1= BAD EEPROM read for Unit options on power up
Unit Bit 2 = 1= BAD EEPROM read for cal factors on power up
For Unit bit map 0=no errors
Channel Bit 0= Short input fault (0=Fault; 1 = no fault)
Channel Bit 1= Open input fault (0=Fault; 1 = no fault)
Channel Bit 2= Overload condition (0=Overload; 1 = no Overload)
For channel bit map 7=no errors
UNIT
The UNIT query returns the unit configuration information which includes the installed options, unit number, Model id
and starting channel number
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd: Model string: Firmware Ver string: Serial Number: Cal Date: Filter Corner:
Unit#:#channels: Starting Ch#: Gain Option byte, Input Option Byte, Filter option byte,Misc1 option
byte,Misc2 option byte<cr><lf>
Query: 1:1:UNIT?
Response: 1:UNIT:482C24 :FW v4A2.5 :1234:12-17-2015
:1:4:1:16,4,0,207,2:0.00000:0.00000:0.00000:0.00000:0.00000:0.00000:0.00000:0.00000: \r\n
Model & Firmware version strings are self-explanatory. Following are:
Serial Number (U16): Cal Date (10 character string): Filter corner (kHz)
Unit Id: Number of Channels: Starting Channel Number followed by the option bytes:
Gain Options
OPT_GAIN_x1
OPT_GAIN_x5
OPT_GAIN_x10
OPT_GAIN_VAR
OPT_GAIN_INC
OPT_GAIN_FINE2h
OPT_GAIN_FINE1k
Input Options
OPT_INP_ALLCHG
OPT_INP_ICPVOLTCHG
OPT_INP_ICPVOLT
OPT_INP_INTCAL
OPT_INP_EXTCAL
OPT_INP_ISOLATION
Filter Options
OPT_FILTER_IN
OPT_FILTER_OUT
OPT_FILTER_FIXLP
OPT_FILTER_PGMELP
0x01
0x02
0x04
0x08
0x10
0x20
0x40
Fixed x1
Fixed x5
Fixed x10
Variable Fixed (x1,x10,x100)
incremental .1-200
Fine Gain .0025-200
Fine Gain .0025-1000
0x01
0x02
0x04
0x08
0x10
0x20
All charge
ICP|VOLT|CHG
ICP|VOLT
Internal Cal
External Cal
Isolation
0x01
0x02
0x04
0x08
Input filter (time constant)
Output filter
Fixed LP filter
Programmable LP Elliptical filter
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
OPT_FILTER_PGMBTR
Miscellaneous Options
OPT_MISC_COUPLING
OPT_MISC_CLAMP
OPT_MISC_TEDS
OPT_MISC_IEXC
OPT_MISC_SINTG
OPT_MISC_DINTG
OPT_MISC_MUX
OPT_MISC_DISPLAY
Miscellaneous 2 Options
OPT_MISC2_IM33893
OPT_MISC2_A2D
OPT_MISC2_MULTIBDwDSP
OPT_MISC2_NOPWRBTN
0x10
Programmable LP Butterworth filter
0x01
0x02
0x04
0x08
0x10
0x20
0x40
0x80
AC/DC coupling
Clamp
TEDS
current excitation
Single Integration
Double Integration
Mux /Switch-out
FP Display
0x01
0x02
0x04
0x80
Old ISO Board installed
A/D installed
Multi-board with display
ignore soft power button operation
36
UNID
The UNID command is used to set the units ID number. The Unit Id number is critical to remote communications since
it indicates to the unit which commands it should accept and respond to. Units are typically shipped with a unit id of 1. If
more than one unit is in the system and they will be communicated with remotely the user must set a unique id in each
unit. This can be done through the front panel interface, if one exists, or by connecting to each unit individually and
sending this command.
Setting:
1:1:UNID= 2\r\n ( unit 1, channel 1, New ID=2 )
Setting Response: 2:UNID:ok
NOTE: The new Unit Id becomes effective immediately
Query:
This command can be sent as a query but its usefulness is marginal being as it is a directed command and as
such it is necessary to include the Unit Id in the command and the response will simply validate the commands
unit id parameter.
Query Format: Unit#:Ch#:UNID?
Response format: Unit#:Cmd:Ch#:=unit id
Query: 2:1:UNID?
Query Response: 2:UNID:1=2;
LEDS
The LEDS command is used to test the LED functionality of the front panel. When sent as a command the LED’s on the
front panel will flash 3 times. This command invokes a function and therefore has no query capability.
Setting:
2:1:LEDS= 0\r\n ( unit 2, channel 1, Any value )
Setting Response: 2:LEDS:ok
Query:
N/A
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
37
RSET
The RSET command is used to restore the factory default channel settings. This command invokes a function and
therefore has no query capability.
Setting:
2:1:RSET = 0\r\n
( unit 2, channel 1, Any value )
Setting Response: 2:RSET:ok
Query:
N/A
The factory Defaults are:
 Gain= 1.0
 Sensitivity=10.0
 Full Scale input= 1000.0
 Full Scale output= 10.0
 Input Mode = ICP
 Input Filter=Disabled
 Current excitation=4.0mA
 Output Filter=Disabled
 Coupling =AC
 Clamp=OFF
 Internal Reference Oscillator=OFF
AUTR
The AUTR command invokes the Auto-Scaling function. With this command, the programmable gain is adjusted to give
the largest signal amplitude output without causing an overload condition. The signals are checked internally; if there is
an overload, the signal is stepped down and checked again.
Possible settings are: 0=off,1-on,2=immediate. The Immediate option causes the auto scale function to execute one time
and then turns off the function automatically. When Auto scale is ‘ON’ the unit will continue to invoke the function until
the function is turned OFF with a subsequent command.
Setting:
2:1:AUTR =1\r\n
( unit 2, channel 1, Auto Scaling ON )
Setting Response: 2:AUTR:ok
Query:
Query Format: Unit#:Ch#: AUTR?
Response format: Unit#:Cmd:Ch#:=current state (0=off,1-on,2=immediate)
Query: 2:1:AUTR?
Query Response: 2:AUTR:1=0;
SAVS
The SAVS command is used to store the current channel setting as the default settings that will be restored on power up.
This command invokes a function and therefore has no query capability.
Setting:
2:1:SAVS = 0\r\n ( unit 2, channel 1, Any value )
MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
38
Setting Response: 2:SAVS:ok
Query: NA
Communication Responses
Typically the unit will return <Unit>:<Cmd String>:OK when the command is successful. Errors are indicated with
negative numbers. The unit may return one of the following:
<Unit>:<Cmd String>:OK<CR> <LF>
Represents that the last command was entered in the correct format and was performed properly.
<Unit>:<Cmd String>:-1<CR> <LF>
Option Error. The unit is not equipped with the option necessary to implement the command sent
<Unit>:<Cmd String>:-2<CR> <LF>
Channel Error. The channel number in the command is invalid.
<Unit>:<Cmd String>:-3<CR> <LF>
Command Error. The command is not recognized.
<Unit>:<Cmd String>:-4<CR> <LF>
Unit Error. The unit number in the command is invalid.
<Unit>:<Cmd String>:-5<CR> <LF>
Unit Error. The function invoked by the command encountered an error or a query only command (ex.
RBIA) was sent as a setting.
<Unit>:<Cmd String>:-6<CR> <LF>
Command Parameter Error. A channel setting parameter was found to be out of range.
<Unit>:<Cmd String>:-10<CR> <LF>
legacy error from bad power supply problem w/482M179 */
<Unit>:<Cmd String>:-11<CR> <LF>
Bridge DC Offset ERR - Illegal Setting
<Unit>:<Cmd String>:-12<CR> <LF>
Bridge DC Offset ERR - Too Many iterations
<Unit>:<Cmd String>:-13<CR> <LF>
ICP DC Offset ERR - Bad RDG
<Unit>:<Cmd String>:-14<CR> <LF>
ICP DC Offset ERR - Too Many iterations
<Unit>:<Cmd String>:-15<CR> <LF>
Balance Request, channel not in Bridge mode - Illegal Setting
<Unit>:<Cmd String>:-16<CR> <LF>
Zero Request, channel not in Bridge mode or ICP/volt - Illegal Setting
<Unit>:<Cmd String>:-17<CR> <LF>
iEXc request while channel in Bridge/Diff mode,- Illegal Setting
<Unit>:<Cmd String>:-18<CR> <LF>
vEXc request while channel in ICP/Volt mode,- Illegal Setting
<Unit>:<Cmd String>:-19<CR> <LF>
TEDS read request when Channel is not in ICP or Voltage Mode
<Unit>:<Cmd String>:-20<CR> <LF>
TEDS Chip Search algorithm Failed
<Unit>:<Cmd String>:-21<CR> <LF>
TEDS Write Buffer too Big
<Unit>:<Cmd String>:-22<CR> <LF>
TEDS Write Buffer CS Failure
Model Number
482C24
Performance
Channels
Sensor Input Type(s)
Voltage Gain
Accuracy(Gain, x0.1 to x0.4)
Accuracy(Gain, x0.5 to x200)
Output Range
Frequency Range(-5 %)(x0.1 to x99.9 Gain)
Frequency Range(-5 %)(x100 to x200 Gain)
Phase Response(at 1 kHz)
Cross Talk(maximum)
TEDS Sensor Support
Fault/Bias Monitor/Meter(LED)
Revision: A
ECN #: 45020
SENSOR SIGNAL CONDITIONER
ENGLISH
SI
4
ICP®, Voltage
x0.1 to x200
±5%
±1%
± 10 V
0.05 to 100,000 Hz
0.05 to 50,000 Hz
±1°
-72 dB
Yes
Open/Short/Overload
4
ICP®, Voltage
x0.1 to x200
±5%
±1%
± 10 V
0.05 to 100,000 Hz
0.05 to 50,000 Hz
±1°
-72 dB
Yes
Open/Short/Overload
Keypad
2 rows, 16 columns
RS-232
19,200 bps
1, 8, 1, No
RTS/CTS
50 ft
Keypad
2 rows, 16 columns
RS-232
19,200 bps
1, 8, 1, No
RTS/CTS
15.2 m
+32 to +120 °F
0 to +50 °C
AC Power
DC power
100 to 240 VAC
1.6 Amps
+24 VDC
≤ 50 mV
<10 mV
<20 mV
+9 to +18 VDC
≤ 2.5 Amps
0 to 20 mA
≤ 50 Ohm
+10 Vpk
Activated
50.0 µV rms
8.0 µV/√Hz
1.5 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
75.0 µV rms
20.0 µV/√Hz
1.5 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
350 µV rms
100.0 µV/√Hz
10.0 µV/√Hz
8.0 µV/√Hz
6.0 µV/√Hz
6.0 µV/√Hz
AC Power
DC power
100 to 240 VAC
1.6 Amps
+24 VDC
≤ 50 mV
<10 mV
<20 mV
+9 to +18 VDC
≤ 2.5 Amps
0 to 20 mA
≤ 50 Ohm
+10 Vpk
Activated
50.0 µV rms
8.0 µV/√Hz
1.5 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
75.0 µV rms
20.0 µV/√Hz
1.5 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
1.0 µV/√Hz
350 µV rms
100.0 µV/√Hz
10.0 µV/√Hz
8.0 µV/√Hz
6.0 µV/√Hz
6.0 µV/√Hz
OPTIONAL VERSIONS
Optional versions have identical specifications and accessories as listed for the standard
model except where noted below. More than one option may be used.
[4]
Control Interface
Human Interface
Display
Digital Control Interface
Digital Control: Data Rate
Digital Control: Start, Data, Stop, Parity
Digital Control: Handshaking
Digital Control: Cable Length(Maximum)
NOTES:
[1]User adjustable, factory set at 4 mA (± 1.0 mA). One control adjusts all channels.
[2]See Manual
[3]Typical, AC Coupled.
[4]0 Hz When DC Coupled
[5]See PCB Declaration of Conformance PS024 for details.
Environmental
Temperature Range(Operating)
Electrical
Power Required(for supplied AC power adaptor)
Power Required(direct input to unit)
AC Power(50 to 60 Hz)
AC Power
Excitation Voltage(To Sensor)
DC Offset(AC Coupled)
DC Offset(DC Coupled, Gain <100)
DC Offset(DC Coupled, Gain ≥100)
DC Power
DC Power
Constant Current Excitation(To Sensor)
Output Impedance
Overload Threshold(± 0.2 Vpk)
Clamp Feature
Broadband Electrical Noise(1 to 10,000 Hz)(Gain x1)
Spectral Noise(1 Hz)(Gain x1)
Spectral Noise(10 Hz)(Gain x1)
Spectral Noise(100 Hz)(Gain x1)
Spectral Noise(1 kHz)(Gain x1)
Spectral Noise(10 kHz)(Gain x1)
Broadband Electrical Noise(1 to 10,000 Hz)(Gain x10)
Spectral Noise(1 Hz)(Gain x10)
Spectral Noise(10 Hz)(Gain x10)
Spectral Noise(100 Hz)(Gain x10)
Spectral Noise(1 kHz)(Gain x10)
Spectral Noise(10 kHz)(Gain x10)
Broadband Electrical Noise(1 to 10,000 Hz)(Gain x100)
Spectral Noise(1 Hz)(Gain x100)
Spectral Noise(10 Hz)(Gain x100)
Spectral Noise(100 Hz)(Gain x100)
Spectral Noise(1 kHz)(Gain x100)
Spectral Noise(10 kHz)(Gain x100)
Physical
Electrical Connector(ICP® Sensor Input)
Electrical Connector(Output)
Electrical Connector(DC Power Input)
Electrical Connector(RS-232 Digital Control)
Size (Height x Width x Depth)
Weight
BNC Jack
BNC Jack
BNC Jack
BNC Jack
6-socket mini DIN (female) 6-socket mini DIN (female)
DB-9 Connector
DB-9 Connector
3.2 in x 8.0 in x 5.9 in
8.1 cm x 20 cm x 15 cm
2.00 lb
908 gm
[5]
All specifications are at room temperature unless otherwise specified.
In the interest of constant product improvement, we reserve the right to change specifications without notice.
ICP® is a registered trademark of PCB Group, Inc.
[1]
[2]
[3]
[3]
[3]
[3]
[3]
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[3]
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[3]
[3]
[3]
[3]
[3]
[3]
[3]
[3]
[3]
[3]
SUPPLIED ACCESSORIES:
Model 017AXX Power Cord (1)
Model 100-7103-50 (02711) Multi-conductor cable, 6-ft, 9-pin female to 9-pin male. (1)
Model 488B14/NC POWER CONVERTOR (1)
Model EE75 PCB MCSC Control Software. (1)
Entered: LK
Engineer: CPH
Sales: ML
Approved: ECB
Spec Number:
Date: 1/20/2016
Date: 1/20/2016
Date: 1/20/2016
Date: 1/20/2016
62808
3425 Walden Avenue, Depew, NY 14043
Phone: 716-684-0001
Fax: 716-684-0987
E-Mail: [email protected]
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