PCB Piezotronics 482C27 Guide

The information contained in this document supersedes all similar information that
may be found elsewhere in this manual.
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 ensure 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 ISO-
9001 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 ensure 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
Service, Repair, and Return
Policies and Instructions

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.
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: [phone]
24-hour SensorLineSM: [phone]
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
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

DOCUMENT NUMBER: 21354
DOCUMENT REVISION: D
ECN: 46162
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: 43265
Manual Revision: D
ECO Number: 49597
SIGNAL CONDITIONER
Model 482C27
GENERAL OPERATION
MANUAL
For powering differential voltage MEMS, single ended MEMS and bridge (quarter, full, half)
sensors, 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. A front panel interface
is provided for easy control and operation. This conditioner also includes ICP® power.

i
Table of Contents
Table of Contents i
1-0. INTRODUCTION AND SPECIFICATIONS 1
1-1. Introduction: Safety Considerations 1
1-2. Model 482C27 System Description 2
1-2.1 Model 482C27 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 7
1-6. Maintenance and Repair 7
2-0. FRONT PANEL MODULE CONTROL 7
2-1. Introduction 7
2-2. Unit Initialization 7
The factory defaults are: 7
2-3. Main Menu Format 7
2-4. Submenu Format and Command Selections 8
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. Normalized Output Sensitivity 20
3.6 Auto Scaling and Overload Detection 21
3-6.1 Auto Scale 21
3-6.2 Overload 21
3-7. Connector Configuration 22
3-8. Channel Input Mode Selection 22
3-9. Bridge/Differential/RSE/NRSE Sensor Connection 22
3-10. RS-232 & Ethernet connections 22
3-11. Non-Volatile Memory 22
3-12. Transducer Electronic Data Sheet (TEDS) Interface: 22
4-0. COMPUTER INTERFACE PROGRAMMING GUIDE 23

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
ii
4-1. Introduction 23
4-2. RS-232 23
4-3. RS-232 Host Set-Up 23
4-4. RS-232 Rear Panel Pinout Listing 23
4-5. Ethernet Communication 23
4-6. Model 482C27 Communication Guidelines 30
4-7. Model 482C27 Unit Initialization Procedure 30
4-8. Command Summary 30
4-9. Command Format 31
4-10. Commands 32
GAIN 32
SENS 32
FSCI 32
FSCO 33
INPT 33
IEXC 34
VEXC 34
FLTR 35
OFLT 35
CLMP 36
CPLG 36
SWOT 36
CALB 37
RTED 37
ALLC 38
RBIA 38
CHRD 38
STUS 39
UNIT 39
UNID 40
AZZR 41
LEDS 41
RSET 41
AUTR 42

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
iii
SAVS 42
Communication Responses 43
5-0. Wiring Information 44
5-1. Differential Voltage & Full Bridge Mode 44
5-2. Half Bridge Mode 45
5-3. Quarter Bridge Mode 46
5-4. RSE / NRSE Mode for 3 Wire Sensors 46
5-5. Connection of Triaxial Sensors 47
Figure 1 Typical Block Diagram of Model 482C27.............................................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 Autoscale/Overload Window Comparator........................................21
Figure 6 Differential Voltage/Full Bridge Type Sensor Connection...............44
Figure 7 Alternate Connections for Differential Voltage/Full Bridge Type
Sensors........................................................................................................45
Figure 8 Recommended Connections for Half Bridge Type Sensors ...........45
Figure 9 Recommended Connections for Quarter Bridge Type Sensors.....46
Figure 10 Recommended Connections for 3 Wire Type Sensor....................46
Figure A1 Settings for Differential MEMS Sensors…………………………….47
Figure A2 Settings for Single Ended MEMS Sensors....................................48

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 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 482C, 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 Electro Static 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 482C27 GENERAL OPERATION MANUAL
2
EQUIPMENT RATINGS
For complete specifications, please refer to the product spec sheet. This equipment operates optimally at +32 to +120°F
(0 to +50°C), in an environment having <85% relative humidity. The line power frequency range is 50/60 Hz.
482C27 requires 10-15 VDC with 500 mA to operate. The unit receives power from a supplied 12 VDC universal AC
power adaptor.
1-2. Model 482C27 System Description
Model 482C27 is a four-channel, bench top signal conditioner that offers low noise operation and simplicity of use.
Each channel is selectable between several input types: Differential Voltage, Non-referenced Single Ended (NRSE),
Referenced Single Ended (RSE), ICP®, Voltage, Bridge (full, half and quarter). NOTE –NRSE and RSE input modes
are for 3-wire sensors that have separate power and signal output connections and a ground connection.
For NRSE, RSE, differential voltage and bridge modes this model offers up to 12 VDC unipolar or bipolar excitation
voltage. These input modes feature incremental gain of x0.1 to x2000, normalization, shunt calibration and AC/DC
coupling. In DC coupled mode, auto balance and auto zero functions automatically compensate the internal circuitry to
provide a zero based output.
The two main input modes for MEMS sensors are:
Differential Voltage –Main use is with MEMS sensors that have a differential output. Sensor examples are PCB model
series 3501, 3503, 3641, 3651, 3741 and 3991.
Referenced Single Ended –Main use is with MEMS sensors that have a single ended output. Sensor examples are PCB
model series 3711 and 3713.
The bridge inputs are compatible with full, ½ and ¼ bridge sensors. Internal switchable bridge completion resistors are
included in the unit (resistance value of 350Ω). The maximum current available is 30mA, with a current limit set at
40mA to prevent damage from inadvertent shorting.
For the ICP® inputs, the model offers up to 20 mA of constant current excitation to power ICP® sensors or in-line
ICP® charge converters. The ICP® and Voltage input feature incremental gain of x.1 to x200, normalization, and
AC/DC coupling. In DC coupled mode, an auto zero function is available to automatically compensate the internal
circuitry to provide a zero based output. In Voltage input mode current excitation is set to 0 mA (off).
Model 482C27 offers the following:
Compatible with PCB’s line of MEMS DC accelerometers (model series 3711, 3713, 3501, 3503, 3741, 3991)
Provides power for ICP® sensors
Compatible with full, ½, and ¼ bridge sensors
Suitable for conditioning any voltage input signals
AC/DC coupling selectable per channel
Auto zero and Auto balance functions
Gain of 0.1 to 2000 for bridge inputs
Gain of 0.1 to 200 for ICP®/voltage inputs
Keypad and menu-driven dot matrix display
Computer control via either RS-232 or Ethernet using the supplied PCB software
1-2.1 Model 482C27 ICP®Input/Output Mode
482C27 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. The 8-pin DIN
connectors are NOT used in ICP® mode.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
3
1-3. Block Diagram
Figure 1 Typical Block Diagram of Model 482C27
1-4. Installation
Model 482C27 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 this unit has low power consumption, it can be located in
confined environments.
1-4.1 Grounding Techniques
Integrating model 482C27 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 model 482C27 have their
signal ground lines tied together internally at the power supply.
Gain x1, x10
Input filter
2nd order
Output filter
4th order
Continuous Gain
0.1 –200x
ICP Current Source /
Input Fault detect
Overload
Detection/
ADC
ICP/Voltage
Input
AC/DC
DC offset
correction
-Vexc
-sense
Output
+Vexc
+sense
AC/DC
coupling
+sig
-sig
Input filter
2nd order
Gain x1, x5
Bridge
Select

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
4
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 test structure (ground) using an isolation pad. The isolation pad breaks the loop formed by the signal path of the
sensor to model 482C27 and the return (ground) from the signal conditioner 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 model 482C27 when initially powered
on.
PCB 482C27
FW VER 1.0
.
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 right direction through the menus and submenus.
ENTER: This button applies the setting of the option selected, while exiting the user out of the submenu.
NOTE: Please refer to section 1-4.2b 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 Setting the sensor input type
The input type option lets the user switch between Differential Voltage, Non-referenced Single Ended (NRSE),
Referenced Single Ended (RSE), ICP®, Voltage, and Bridge (full, half and quarter) modes. The factory default for all
channels is ICP. To change the input type 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 the INPT option, and hit the <ENTER> key.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
5
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 INPT column. To change the input, use either the up or
down arrow to scroll through the options. The channels can be in ICP, Voltage, Differential Voltage, Full Bridge,
Half Bridge, Quarter Bridge, Non Referenced Single Ended (NRSE) or Referenced Single Ended (RSE) mode.
Once it is set, 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 Full Bridge 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 INPT column. Use the up or down arrow keys
until the mode says BRG FULL.
Chan
Input Type
2
BRG FULL
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.
Chan
Input Type
All
BRG FULL
NOTE: Setting a channel to NRSE, RSE, Voltage, Differential voltage or Bridge (full, ¼, ½) mode will cause the ICP®
current source for that channel to be turned off, 0 mA. The voltage excitation (EXCv) must be set after selecting one of
these input modes. Conversely, if ICP® is set from another input mode then the ICP® current source will be set to 4mA.
Exiting NRSE, RSE, Differential voltage or Bridge (full, ¼, ½) mode will cause the voltage excitation to be set to 0V
for that channel.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
6
1-4.2c Directly setting the gain
To enter the submenu for the incremental gain in the 482C27, 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
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 options. Model 482C27 has incremental
gain selectable from .1 to 200.0 (step of .1). 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 do a global change (set all the channels to the same gain) set the channel to ALL. If the global method of
changing channel gains is employed and one or more channels are set to input types that do not support the selected gain
setting then those channels will be set to their maximum value. For example, if channels 1 & 2 are set to Full Bridge and
3 & 4 are set to ICP® and the user sets the gain channel option to ‘ALL’ with a value of 1000, then the Bridge channels

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
7
will be set to 1000 but the ICP® channels will be set to 200 because that input type has a gain limit of 200 and cannot be
set to 1000.
NOTE: For more information on gain, please see section 2-4 (#1 –Gain Functionality).
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.
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 to repair model 482C27 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 482C27 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 482C27
FW Ver n.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.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
8
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 arrow key. This action scrolls vertically to the subsequent lines on the menu. Theses lines are
shown below.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
SWOT
CLMP
Bias
CHRD
Cal
LEDS
Ver?
Unit
Reset
Disp
Savs
GType
Pressing the down arrow key button once again shows:
GAIN
SENS
INPT
FSOT
FSIN
FLTi
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 482C27.
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

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
9
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.
For NRSE, RSE, differential voltage and bridge input modes: .1 to 2000.0. 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.
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 482C27 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.
Chan Sensitivity
2 00100.000
Chan FSOT
2 0010.0
Chan FS In
2 01000.000

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
10
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 482C27 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.
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 482C27 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 frequency, in kHz, implemented by the filter for the channel.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
11
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.
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 482C27 will turn off the current excitation signal if the unit is not in ICP® input mode and will not allow it to be set
while unless it is in ICP® mode. If a channel is selected from the EXCi 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):
NOTE: This menu selection is for Differential Voltage, RSE, NRSE and bridge (full, half and quarter) input modes
ONLY. It is NOT for the Voltage input mode.
The voltage excitation value can be set from -12.00 to +12.00 V. A positive entry forces a unipolar setting and a
negative entry forces a bipolar entry. 0 = Off. To set the voltage excitation value, move the cursor to the ‘EXCv’
location, as shown below.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
12
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
Pressing the ENTER button, will cause the following submenu to appear. The voltage excitation may be altered by using
the up or down arrow keys to adjust the voltage value. Traversing the menu once more provides the option to select
UNI –unipolar or BI –bipolar settings. Changing these will also force the sign of the voltage excitation value to the
appropriate value.
Ch
Vexc
Polarity
4
10.00
UNI
The 482C27 will turn off the voltage excitation signal if the unit is in ICP® or voltage input mode and will not allow it
to be set while in those modes. If a channel is selected from the EXCv menu that is inappropriate then NA will appear as
shown below in place of the voltage and polarity settings. Also, because of this limitation, the ‘ALL’ channel selection is
not allowed for this setting.
Ch
Vexc
Polarity
2
NA
NA
NOTE: The factory default setting for voltage excitation is 0.
7) Input Coupling (ACDC on front panel):
482C27 provides an option for AC or DC coupling. The AC coupled mode passes the signal through a DC blocking
capacitor or high pass filter to remove the sensor bias voltage.
EXCi
EXCv
FLTo
ACDC
ZERO
ARNG
When the ENTER button is pressed while over ACDC, 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