PCB Piezotronics 482C24-SU User manual

Model 482C24-SU
4-channel, line powered, ICP® sensor signal cond., AC/DC coupling, gain x0.1 to x200
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: [phone]
E-mail: [email protected]
Web: www.pcb.com

Manual 21354 Rev E
ECN 50523
Repair and Maintenance
PCB guarantees Total Customer Satisfaction through its
“Lifetime Warranty Plus” on all Platinum Stock Products
sold by PCB and through its limited warranties on all other
PCB Stock, Standard and Special products. Due to the
sophisticated nature of our sensors and associated
instrumentation, field servicing and repair is not
recommended and, if attempted, will void the factory
warranty.
Beyond routine calibration and battery replacements
where applicable, our products require no user
maintenance. Clean electrical connectors, housings, and
mounting surfaces with solutions and techniques that will
not harm the material of construction. Observe caution
when using liquids near devices that are not hermetically
sealed. Such devices should only be wiped with a
dampened cloth—never saturated or submerged.
In the event that equipment becomes damaged or ceases
to operate, our Application Engineers are here to support
your troubleshooting efforts 24 hours a day, 7 days a
week. Call or email with model and serial number as well
as a brief description of the problem.
Calibration
Routine calibration of sensors and associated
instrumentation is necessary to maintain measurement
accuracy. We recommend calibrating on an annual basis,
after exposure to any extreme environmental influence,
or prior to any critical test.
PCB Piezotronics is an ISO-9001 certified company whose
calibration services are accredited by A2LA to ISO/IEC
17025, with full traceability to SI through N.I.S.T. In
addition to our standard calibration services, we also offer
specialized tests, including: sensitivity at elevated or
cryogenic temperatures, phase response, extended high
or low frequency response, extended range, leak testing,
hydrostatic pressure testing, and others. For more
information, contact your local PCB Piezotronics
distributor, sales representative, or factory customer
service representative.
Returning Equipment
If factory repair is required, our representatives will
provide you with a Return Material Authorization (RMA)
number, which we use to reference any information you
have already provided and expedite the repair process.
This number should be clearly marked on the outside of
all returned package(s) and on any packing list(s)
accompanying the shipment.
Contact Information
PCB Piezotronics, Inc.
3425 Walden Ave.
Depew, NY14043 USA
Toll-free: [phone]
24-hour SensorLine: [phone]
General inquiries: in[email protected]
Repair inquiries: [e-mail]
For a complete list of distributors, global offices and sales
representatives, visit our website, www.pcb.com.
Safety Considerations
This product is intended for use by qualified personnel
who recognize shock hazards and are familiar with the
precautions required to avoid injury. While our equipment
is designed with user safety in mind, the protection
provided by the equipment may be impaired if equipment
is used in a manner not specified by this manual.
Discontinue use and contact our 24-Hour Sensorline if:
Assistance is needed to safely operate equipment
Damage is visible or suspected
Equipment fails or malfunctions
For complete equipment ratings, refer to the enclosed
specification sheet for your product.
Definition of Terms and Symbols
The following symbols may be used in this manual:
DANGER
Indicates an immediate hazardous
situation, which, if not avoided, may
result in death or serious injury.

Manual 21354 Rev E
ECN 50523
CAUTION
Refers to hazards that could damage
the instrument.
NOTE
Indicates tips, recommendations and
important information. The notes
simplify processes and contain
additional information on particular
operating steps.
The following symbols may be found on the equipment
described in this 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 on the unit indicates that
the user should refer to the operating
instructions located in the manual.
This symbol indicates safety, earth
ground.

Manual 21354 Rev E
ECN 50523
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
部件名称
有害物质
铅(Pb)
汞
(Hg)
镉
(Cd)
六价铬(Cr(VI))
多溴联苯 (PBB)
多溴二苯醚(PBDE)
住房
O
O
O
O
O
O
PCB板
X
O
O
O
O
O
电气连接器
O
O
O
O
O
O
压电晶体
X
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
O
O
O
O
厚膜基板
O
O
X
O
O
O
电线
O
O
O
O
O
O
电缆
X
O
O
O
O
O
塑料
O
O
O
O
O
O
焊接
X
O
O
O
O
O
铜合金/黄铜
X
O
O
O
O
O
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

Manual 21354 Rev E
ECN 50523
Component Name
Hazardous Substances
Lead (Pb)
Mercury (Hg)
Cadmium (Cd)
Chromium VI
Compounds
(Cr(VI))
Polybrominated
Biphenyls (PBB)
Polybrominated
Diphenyl Ethers
(PBDE)
Housing
O
O
O
O
O
O
PCB Board
X
O
O
O
O
O
Electrical Connectors
O
O
O
O
O
O
Piezoelectric Crystals
X
O
O
O
O
O
Epoxy
O
O
O
O
O
O
Teflon
O
O
O
O
O
O
Electronics
O
O
O
O
O
O
Thick Film Substrate
O
O
X
O
O
O
Wires
O
O
O
O
O
O
Cables
X
O
O
O
O
O
Plastic
O
O
O
O
O
O
Solder
X
O
O
O
O
O
Copper Alloy/Brass
X
O
O
O
O
O
This table is prepared in accordance with the provisions of SJ/T 11364.
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.


PCB PIEZOTRONICS, INC. 3425 WALDEN AVENUE DEPEW, NY 14043-2495 PHONE [phone] FAX [phone]
®ICP is a registered trademark of PCB Group, Inc. KS398
Manual Number: 63496
Manual Revision: B
ECO Number: 47035
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.

i
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 2
1-4 Installation 3
1-4.1 Grounding Techniques 3
1-4.2 Quick Set-up Instructions 3
1-5 Operation: Standard AC Line 5
1-6 Maintenance and Repair 6
2-0 FRONT PANEL MODULE CONTROL 6
2-1 Introduction 6
2-2 Unit Initialization 6
2-3 Main Menu Format 6
2-4 Submenu Format and Command Selections 7
Reference 17
3-0 THEORY OF OPERATION 17
3-1 Sensor Excitation 17
3-2 Input Protection 18
3-3 Input Fault Detection 18
3-4 Input Interface 18
3-5 Normalized Output Sensitivity 18
3-6 Overload Detection and Autoscaling 19
3-6.1 Auto scaling 19
3-6.2 Overload 19
3-7 Connector Configuration 20
3-8 RS-232 Interface 20
3-9 Non-Volatile Memory 20
3-10 Transducer Electronic Data Sheet (TEDS) Interface 20
4-0 COMPUTER INTERFACE PROGRAMMING GUIDE 20
4-1 Introduction 20
4-2 RS-232 21

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
ii
4-3 RS-232 Host Set-Up 21
4-4 RS-232 Rear Panel Pin out Listing 21
4-5 Ethernet Communication 21
4-6 Communication Guidelines 21
4-7 Unit Initialization Procedure 22
4-8 Command Summary 22
4-9 Command Format 23
4-10 Commands 23
GAIN 23
SENS 24
FSCI 24
FSCO 25
INPT 25
IEXC 26
FLTR 26
OFLT 26
CLMP 27
CPLG 27
AZZR 27
VEXC 28
CALB 28
RTED 29
WTED 30
ALLC 30
RBIA 31
CHRD 31
SWOT 31
STUS 32
UNIT 32
UNID 33
LEDS 34
RSET 34
AUTR 35
SAVS 35

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
iii
Communication Responses 35
Figure 1 Generic Block Diagram of series 482C................................................2
Figure 2 ICP®Sensor Excitation........................................................................17
Figure 3 Input Fault Window Comparator with LED Indicator.......................18
Figure 4 Input Amplifier Configuration.............................................................18
Figure 5 Autoscale/Overload Window Comparator........................................19
Figure 6 RS-232 Configuration..........................................................................20

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
1
1-0. INTRODUCTION AND SPECIFICATIONS
1-1. Introduction: Safety Considerations
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.
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. The unit receives power from a supplied 12 VDC universal AC
power adaptor.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
2
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 up 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.
1-3. Block Diagram
Figure 1 Generic block diagram of model series 482C signal conditioners (* = option)

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
3
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.
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.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
4
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
INPT
FSOT
FSIN
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.
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

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
5
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
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.
Channel
Gain
2
001.0
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
010.0
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.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
6
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. FRONT PANEL MODULE CONTROL
2-1. 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.
2-2. 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
Gain Type = Gain
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

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
7
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.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
SWOT
CLMP
Bias
CHRD
Cal
LEDS
Ver?
Unit
Reset
Disp
Savs
Res
2-4. Submenu Format and Command Selections
1) Gain Functionality –Includes five menu selections
The following menu options all pertain to how the gain functionality operates in the 482C24.
Gain Type (GType on front panel): Allows the user to choose how the gain of each channel can be set. The selections
in the submenu are Gain and Normalize (Gain is the factory default setting). Pressing ENTER brings up the submenu
shown below. The up and down arrow key can be used toggle between the two options.
Gain Set Option
Gain
Both options return control to the main menu after a selection is made. If Gain is selected then only the GAIN menu
item can be used to set the gain of a channel. If Normalize is selected then the GAIN menu item is disabled and SENS,
FSOT and FSIN will be used to set the gain using this equation: Gain = (FSOT * 1000) / (FSIN * SENS).
If the user attempts to use a menu selection (SENS, FSOT, FSIN, GAIN) that conflicts with the GType setting the
message ‘Invalid Item for Gain Entry Type’ will be displayed.
Gain (GAIN on front panel): Directly sets the gain value of each channel. For ICP®/voltage input modes: .1 to 200.0.
GType must be set to the Gain selection. See section 1-4.2c for instructions on setting the gain directly. The gain step is
.1.
Sensitivity (SENS on front panel): The sensor sensitivity is entered here using the  and  arrow keys and then
hitting Enter. GType must be set to the Normalize selection.
Full Scale Input (FSIN on front panel): The estimated full scale mechanical input (ex –engineering units, g’s, psi, bar,
etc.) is entered here using the  and  arrow keys and then hitting Enter. GType must be set to the Normalize
selection.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
8
Full Scale Output (FSOT on front panel): The desired full scale output voltage is entered here using the  and 
arrow keys and then hitting Enter. GType must be set to the Normalize selection.
The submenus for SENS, FSIN and FSOT appear like this:
The 482C24 has the ability to automatically normalize the output sensitivity of each channel based on the sensitivity of
the sensor (SENS), the full scale value of the input (FSIN) in engineering units (g’s for example) and the full scale
output (FSOT) of the amplifier expressed in volts (this is the output that a signal at an FSIN level will produce). As
stated previously, the gain equation is:
Gain = (FSOT * 1000) / (FSIN * SENS)
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.
Gain = (5 * 1000) / (380 * 9.96) = 1.3
Normalization is useful when standardizing the output of channels with sensors of different sensitivities. Consider the
following example where 1V/unit standardization on each channel is desired:
Channel
Sensor Sensitivity
Gain Setting
Actual Gain Needed
1
10.10 mV/unit
99.00
99.01
2
101.32 mV/unit
9.9
9.869
3
22.30 mV/unit
44.8
44.84
NOTE: The GAIN menu selection will not show what the gain is set at when in the Normalize GType setting, but the
front panel will display the gain value of each channel (to the best accuracy possible) if the Display Content Option is set
to show gain. See Display Content Option for more detail (#19 within this section of the manual).
2) Sensor Input Mode (INPT on front panel):
See section 1-4.2b.
3) Input Filter (FLTi on front panel):
A screen stating ‘This Option is Not Installed’ will appear. The 482C24 does not come standard with an input filter, but
the option is available. Contact the factory for more information.
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.
Chan Sensitivity
2 00100.000
Chan FSOT
2 0010.0
Chan FS In
2 01000.000

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
9
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
4) Output Filter (FLTo on front panel):
A screen stating ‘This Option is Not Installed’ will appear. The 482C24 does not come standard with an output filter, but
the option is available. Contact the factory for more information.
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.
Chan
Out Filter
2
ON-10.0k
5) ICPCurrent Adjustment (EXCi on front panel):
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.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
10
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.
6) Voltage Excitation (EXCv on the front panel):
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
7) Input Coupling (ACDC on front panel):
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:
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
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.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C24 GENERAL OPERATION MANUAL
11
Chan
Coupling
1
DC
The coupling options are AC or DC. In DC coupling mode the Auto Zero function becomes available.
8) Auto Zero / Auto Balance (ZERO on front panel):
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.
9) Auto Range (ARNG on front panel):
The auto range (also referred to as auto scale) feature provides an automatic scaling of the output signal. Please refer to
section 3-6.1 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.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
Use the up or down arrow keys to toggle between the ‘OFF’, ‘ON’, or ‘IMED’ options. Once you have set the Auto-
scale 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.