Sensotec CA2 Manual de usuario
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2080 ARLINGATE LANE, COLUMBUS OHIO 43228 (614) 850-5000
MODEL CA2
INLINE CHARGE
AMPLIFIER
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Inline Charge Amplifier
Model CA2 User's Guide
Sensotec Part Number: 008-0508-00
Rev. 0: August, 1997
Copyright Notice:
Copyright @ 1993 by SENSOTEC, INC.
2080 Arlingate Lane
Columbus, Ohio 43228
U.S.A.
All rights Reserved.
Printed in U.S.A.
TEL (614) 850-5000
FAX (614) 850-1111
1-800-848-6564
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TABLE OF CONTENTS
Page Number
CHAPTER 1: INTRODUCTION
1.1 Overview..........................................
1.2 Specifications...................................
1.3 Layout..............................................
CHAPTER 2: INSTALLATION / SET UP
2.1 Wiring................................................
2.2 Sensitivity Switch Setup....................
2.3 Panel Mounting Information...............
CHAPTER 3: CALIBRATION
3.1 Calibration.........................................
3.2 Long Time Constant Option..............
CHAPTER 4: WARRANTY / REPAIR POLICY
4.1 Limited Warranty on Products............
4.2 Obtaining Service Under Warranty....
4.3 Obtaining Non-Warranty Service.......
4.4 RepairWarranty................................
APPENDIX A......................................................
1-1
1-1
1-2
2-1
2-2
2-3
3-1
3-3
4-1
4-1
4-2
4-2
A-1
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Chapter 1
INTRODUCTION
1.1 OVERVIEW
Charge mode piezoelectric transducers require charge amplifiers to
converttheiroutputtousefulvoltagelevels. TheSensotecmodel3168
Inline Charge Amplifier is a versatile convenient solution to the use of
chargemodepiezoelectric transducers. The inline is housedina small
metal package which is connected between the transducers and the
instrumentation. The amplifier features multiple sensitivity settings
creating a flexible measuring system.
1.2 SPECIFICATION
Power Requirements + / - 15 volts DC, or 24 - 32
volts DC (with -Output
voltage = 1/2 of supply)
Amplifier Characteristics
Sensitivity Programmable(.05mV/pCto
6.4 mV/pC)
Input Range 780pC to 100,000pC
Output + / - 5V RMS max
Frequency Response Standard- 3HZ to 30kHz
Long TC-~DC to 30kHz
Time Constant Standard- 50 milliseconds
Long TC- 2,000 seconds
Short Circuit Protected + Output to - Output
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1.3 LAYOUT
Figure 1-1. Layout of Inline Amplifier
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Chapter 2
INSTALLATION / SET UP
2.1 WIRING
The Inline Charge amplifier can be powered from a + / - 15 volts DC or
a 24 to 32 volt single voltage supply. The following diagrams show the
wiring to each type of supply.
Cables should be stripped back 3 inches with the wires stripped and
tinned1/2inch. Connectionstotheterminalblockaremadebypressing
theorangeleversandinsertingthewiresintotheholesnexttothelevers.
The terminal block will accept wire up to AWG 20.
Figure 2-1. + / - 15 Volt Power Supply to Inline Wiring
Figure 2-2. 24 - 32 Single Voltage Supply To Inline
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Multipleswitchcombinationscanbeactivatedtoattainadditionalsensi-
tivities. Forexample, if 1mV/pC isdesired then switches 4and6 would
be on. (.8V/pC+.2mV/pC=1mV/pC).
The factory default setting is 1mV/pC. DO NOT use the fine gain
adjustment potentiometer unless you are re-calibrating the charge
amplifierorifyou are scaling the output to aknowninput. Adjustingthe
fine gain potentiometer changes the sensitivities listed in table 2-1.
IfthecustomerrequestsSensotectoset-upthetransducerandCA2for
a single sensitivity, the coarse and fine gain adjustment should not be
altered. In this event the customer loses the flexibility of sensitivity
adjustment. Table 2-1 no longer applies.
Table 2-1. Coarse Gain Setup
2-2
2.2 SENSITIVITY SELECT
The connection to the sensor is thru a low noise miniature coaxial
cable. Cable length should be as short as possible to minimize noise.
Figure 2-2. Sensor to Inline Wiring
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2.3 PANEL MOUNTING INFOMATION
The inline can be easily mounted to a panel by using the template in
Appendix A for marking the holes in the panel. The cover must be
removed to get access to the mounting holes. Use # 6 or # 8 screws for
mounting box to panel.
Actual size not shown. See Appendix A for Template.
Figure 2-3. Panel Mounting Layout
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