Kistler 5118B2 Owner's manual

Brand: Kistler

Model: 5118B2

Type: Owner's manual

Instruction

manual

5118B…_002 − 150e-10.18

Power Supply/

Coupler

Type 5118B1 and

5118B2

Instruction

manual

5118B…_002 − 150e-10.18

Operating Instruc-

tions Power Supply/

Coupler

Types 5118B1 and

5118B2

Page 1

5118B…_002 − 150e-10.18

Thank you for choosing a Kistler quality product characterized

by technical innovation, precision and long life.

Information in this document is subject to change without

notice. Kistler reserves the right to change or improve its

products and make changes in the content without

obligation to notify any person or organization of such changes

or improvements.

provided herein, no part of this manual may be reproduced

for any purpose without the express prior written consent

of Kistler Group.

Kistler Group products are protected by various intellectual

property rights. For more details visit www.kistler.com. The

Kistler Group includes Kistler Holding AG and all its subsidiaries

in Europe, Asia, the Americas and Australia.

Kistler Group

Eulachstrasse 22

8408 Winterthur

Switzerland

Tel. + 41 52 224 11 11

info@kistler.com

www.kistler.com

Foreword

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 2

Content

1. Introduction .................................................................................................................................4

1.1 For your safety ....................................................................................................................4

1.2 Electromagnetic compatibility (EMC) ..................................................................................5

1.3 Warnings and their relevance .............................................................................................5

1.4 Disposal instructions for electrical and electronic equipment .............................................5

1.5 Software upgrades and updates .........................................................................................6

1.6 Using this manual ...............................................................................................................6

2. General description ....................................................................................................................7

2.1 Supplied and optional items ...............................................................................................7

2.2 Compatibility .......................................................................................................................8

2.3 CE Conformity ....................................................................................................................8

2.4 Piezoelectric measurement concept ...................................................................................8

2.4.1 The high impedance sensor ..................................................................................8

2.4.2 The low impedance sensor ...................................................................................9

2.4.3 Low impedance measuring system .......................................................................9

3. Technical information, functional description .......................................................................10

3.1 Power supply ....................................................................................................................10

3.1.1 Supply current .....................................................................................................10

3.2 Rapid Zero ........................................................................................................................ 11

3.3 Voltageamplier ...............................................................................................................11

3.4 Bias indicator ....................................................................................................................11

3.5 Low Battery Indication ......................................................................................................12

4. Assembly, installation and operation ......................................................................................13

4.1 Unpacking .........................................................................................................................13

4.2 Connections ......................................................................................................................13

4.2.1 Signal Connections .............................................................................................13

4.2.2 Power Supply Connection ...................................................................................13

4.3 Battery operation ..............................................................................................................14

4.3.1 Installation and operation ....................................................................................14

4.3.2 Battery back-up ...................................................................................................15

4.4 Front - rear panel controls and indicators .........................................................................15

4.4.1 Power switch .......................................................................................................15

4.4.2 Bias indicator .......................................................................................................15

4.4.3 Unit gain ..............................................................................................................16

4.4.4 Highpasslter ......................................................................................................16

4.4.5 Rear panel ...........................................................................................................17

Page 3

5118B…_002 − 150e-10.18

Total pages 24

4.5 Lowpasslters ..................................................................................................................18

4.5.1 General information .............................................................................................18

4.5.2 Purposeoflowpassltering ................................................................................18

4.5.3 Installation ...........................................................................................................20

5. Maintenance and calibration ....................................................................................................21

5.1 Calibration ........................................................................................................................21

5.2 Bias test ............................................................................................................................21

5.3 Maintenance and repairs ..................................................................................................21

6. Storage and transportation considerations ...........................................................................22

7. Technical data ...........................................................................................................................22

7.1 Technicalspecication ......................................................................................................22

8. Warranty .....................................................................................................................................22

Appendix A — Condensed operating instructions ...........................................................................23

Type 5118B1 ...............................................................................................................................23

Type 5118B2 ...............................................................................................................................23

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 4

1. Introduction

Please take the time to thoroughly read this instruction manual.

It will help you with the installation, maintenance, and use of this

product. General know-how about PLC control system setup,

programming and device integration is required.

To the extent permitted by law Kistler does not accept any

liability if this instruction manual is not followed.

Kistler offers a wide range of products for use in measuring

technology:

Piezoelectric sensors for measuring force, torque, strain,

pressure, acceleration, shock, vibration and acoustic-emis-

sion

Strain gage sensor systems for measuring force and torque

Piezoresistive pressure sensors and transmitters

Signal conditioners, indicators and calibrators

Electronic control and monitoring systems as well as soft-

ware for speciﬁc measurement applications

Data transmission modules (telemetry)

Kistler also develops and produces measuring solutions for

the application ﬁelds engines, vehicles, manufacturing, plas-

tics and biomechanics sectors. Our product and application

brochures will provide you with an overview of our product

range. Detailed data sheets are available for almost all products.

If you need additional help beyond what can be found either

online or in this manual, please contact Kistler’s extensive

support organization.

1.1 For your safety

The device left the factory in a perfectly safe condition. To

maintain this condition and ensure safe operation, follow

the directions and warnings in this Instruction Manual and

on the device.

Also follow local safety regulations governing the handling

of electrical and electronic equipment.

If it has to be assumed that the ampliﬁer can no longer be

operated safely, switch it off and secure it to ensure it cannot

be switched on again inadvertently.

Safe operation is no longer possible

if the equipment is visibly damaged,

if it is not working properly,

after prolonged storage under adverse conditions,

after being severely impacted in transit.

Introduction

Page 5

5118B…_002 − 150e-10.18

If any of the above indicates that safe operation is no longer

ensured, the device must be immediately sent to the respon-

sible Kistler sales center or distributor for repair.

1.2 Electromagnetic compatibility (EMC)

The Type 5118B… charge ampliﬁer is manufactured in con-

formity with CE requirements. It meets the electromagnetic

compatibility safety requirements to EN 61000 - 6-2 (Immunity)

and EN 61000 - 6-4 (Interference).

1.3 Warnings and their relevance

Disregard of the following precautions can lead to malfunctions

or damage to system components, environment or people

(see table below).

Symbol Disregard may have consequence

Mechanical defects or with unpredictable consequence

(might endanger material or people)

Indicates a caution or warning notice

Indicates a tip or important information

1.4 Disposal instructions for electrical and electronic equipment

Do not discard old electronic instruments in municipal trash.

For disposal at end of life, please return this product to an

authorized local electronic waste disposal service or contact the

nearest Kistler Instrument sales ofﬁce for return instructions.

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 6

1.5 Software upgrades and updates

Kistler may from time to time supply upgrades or updates for

embedded software. Such upgrades or updates must always

be installed.

Kistler declines any liability whatsoever for any direct or con-

sequential damage caused by products running on embedded

software which has not been upgraded or updated with the

latest software supplied.

This device does not allow Firmware update by customer.

Please get in contact with you Kistler Service Center in order

to check options to update your device to the latest Firmware.

1.6 Using this manual

It is recommended that the user reads the entire manual prior

to operating the coupler. A thorough understanding of this

instrument will ensure the maximum utilization of the many

instrument features. A detailed table of contents has been

included to assist the user.

A convenient “Quick Start” section can be found in Appendix

A. This section provides the basic information required to place

the coupler into operation immediately without a detailed

explanation of the coupler’s functions.

General description

Page 7

5118B…_002 − 150e-10.18

2. General description

The Kistler 5118B series of couplers provide constant current

power to Kistler and other low impedance piezoelectric sensors.

This coupler is variously known as a constant current source

supply or an ICP power supply. All units can be powered from

internal batteries or an external DC power source.

The 5118B series is available in two types. The Type 5118B1

provides constant current excitation and removes the DC bias

component from the low impedance, voltage mode sensor.

Front panel indicators alert the operator as to the condition

of the sensor, cable and battery. Optional plug-in lowpass

ﬁlters are available.

Fig. 1: Front panel of the Type 5118B2

The 5118B2 contains all the features of the 5118B1 with the

addition of input ampliﬁcation with selectable gains of X1, X10

and X100. A front panel switch allows for selection between

two highpass ﬁlters. A plug-in lowpass ﬁlter is available.

2.1 Supplied and optional items

The standard coupler is supplied in an extruded aluminum

case that is suitable for stand-alone operation or for mounting

is a panel. The couplers operate from batteries, DC power

or an external power supply. An optional panel mounting kit

is available.

Table 1 (next page) lists accessories available for the 5118B

coupler. Refer to the 5118B data sheet for supplied and op-

tional accessories.

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 8

Quantity Description Kistler part number

4 Alkaline batteries, 1.5V 55129297

1Power adaptor, 230/120 VAC — 12

VDC (optional) Type 5752

16 foot DC power cable mate to

pigtails (optional) 55131496

Tab. 1: Included and optional items for the 5118B series

2.2 Compatibility

The 5118B series is compatible with virtually all low imped-

ance piezoelectric sensors. Sensor types include Piezotron,

and PiezoBEAM. This Kistler power supply/coupler provides

constant current power to Kistler and other low impedance

piezoelectric sensors. The power supply/coupler is variously

known as a constant current source supply or ICP power sup-

ply. The 5118B will also power external impedance converters

such as the Kistler Type 557, 558 and many other “Source

Followers” and “Charge Converters” that require a constant

current power supply

2.3 CE Conformity

The Type 5118B conforms with the appropriate standards

and regulations on electromagnetic compatibility and prod-

uct safety. These standards and regulations are listed on the

Declaration of Conformity in the rear of this manual.

2.4 Piezoelectric measurement concept

This section provides basic information about high and low

impedance piezoelectric sensors. The following descriptions

only cover how these types of sensors are used with the 5118B

couplers. Technical papers are available from Kistler for users

that desire a more theoretical discussion.

2.4.1 The high impedance sensor

High impedance piezoelectric sensors convert mechanical phe-

nomena of pressure, force, and acceleration into an electrical

charge. The charge delivered by the sensor is proportional to

the force acting on the internal quartz (piezoelectric) crystal

General description

Page 9

5118B…_002 − 150e-10.18

element. For the transducer, the calibration factor is given

in picoCoulombs per mechanical unit (e.g. pC/bar, pC/N,

pC/g, etc.).

The 5118B coupler is designed for use with low impedance,

voltage mode sensors. The coupler can be used with high

impedance sensors when used in conjunction with an external

impedance converter e.g., the Kistler Types 557 and 558. Kistler

offers a line of dual-mode and charge ampliﬁers for use with

charge mode sensors. Consult Kistler for more information

on instrumentation for charge-mode sensors.

2.4.2 The low impedance sensor

A miniature electronic circuit is built into the housing of a low

impedance sensor. This circuit converts the high impedance

charge signal generated by the piezoelectric material into

avoltage signal, with an output impedance typically below

100 Ω. This allows the use of conventional, coaxial or two-wire

cable between the sensor and the remotely located power

supply/coupler. Both the power to and signal from the sensor

are transmitted over the two-wire cable.

Low impedance sensors are ideally suited for applications

where long or moving cables are required or in high humidity

or other contaminated atmospheres. They eliminate the high

impedance problems by providing a voltage signal with low

impedance and a wide frequency response. The calibration

factors for these sensors are given in millivolts per mechanical

unit (e.g., mV/bar, mV/N, mV/g, etc.).

2.4.3 Low impedance measuring system

A typical low impedance measuring system consists of thefol-

lowing components:

The sensor (with built-in impedance converter).

A power supply/coupler e.g., 5118B series

A read-out or display instrument.

Appropriate connecting cables.

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 10

3. Technical information, functional description

This section describes the functions of pertinent stages of

the coupler circuits.

3.1 Power supply

This part describes the internal power conditioner consisting

of the DC to DC converter and current source as shown in

Figure 1. The couplers can be powered with four 1.5 Volt, AA

alkaline batteries; a user supplied external DC power supply,

or AC-DC line operated power adapter.

The coupler’s power conditioner is equipped with the fol-

lowing features:

Over voltage protection.

Reverse polarity protection.

Input voltage range of 6…30 VDC.

 Battery lifetime of approximately 12 hours when using

alkaline-zinc batteries and accelerometer current at 2mA

(factory set).

 Automatic switching between battery and external

power. The 5118B will select the input with the highest

voltage.

The power conditioning stage contains a voltage converter

which converts the input power level (from batteries or external

power) to ±30 VDC. Voltage regulators furnish power, at the

proper levels, to the various stages of the coupler.

The 5118B is protected from excessive input voltage and reverse

polarity. If any of these faults occur an internal self-resetting

switch will open. When the fault is corrected, the switch will

close and the unit will be ready for operation.

3.1.1 Supply current

A constant current source supplies a constant 2mA to the

connected sensor. The sensor current can be increased (factory

modiﬁcation) to a maximum of 18 mA. Note that increasing

the supply current will decrease the internal battery life.

For most applications, the 2mA current supply is more than

adequate. Increased current is sometimes required when using

long cables between the sensor and coupler. As cable length

is increased the cable capacitance becomes signiﬁcant, there-

by loading the sensor’s internal electronics. If the current is

not sufﬁcient to charge the cable at an adequate rate, high

frequency distortion will be experienced. The solution to this

Technical information, functional description

Page 11

5118B…_002 − 150e-10.18

problem is to increase drive current. The following formula

can be used to determine the maximum usable frequency:

fmax(kHz) = (I - 1) ÷ 2π Vpp Cc

Where:

I = Sensor current (milli-amperes)

Cc= Total cable capacitance (micro-farads)

Vpp = Full scale signal amplitude (volts)

3.2 Rapid Zero

A “Rapid Zero” circuit reduces the long settling times usually

associated with turning on power, changing ampliﬁer gains and

ﬁlter time constants. The circuit disables the 5118B ampliﬁer

for a period of approximately two seconds while pre-charging

the ampliﬁer’s coupling capacitors, thus making the 5118B

operational to the user within a few seconds.

3.3 Voltage ampliﬁer

The voltage ampliﬁer is comprised of the highpass and lowpass

ampliﬁer (Figure 1). In addition to the selectable gain, the

ampliﬁer stage also provides the switchable time constants

of the highpass ﬁlter. This stage has excellent common mode

rejection. The gain of this stage is set at 1X in the Type 5118B1

providing decoupling and isolation.

Provisions are included for a standard Kistler plug-in lowpass

ﬁlter. The 2-pole Butterworth lowpass ﬁlter is implemented

using a Sallen-Key conﬁguration exhibiting a -12 dB/octave

rolloff. See Section 4.5.1 for a list of frequencies and type

numbers.

3.4 Bias indicator

The bias indicator circuit consists of voltage comparators and

three LED indicators. The “Normal” LED is on when the bias

voltage is within the normal operating range. In the event of

ahigh or low bias voltage, the respective LED will light and the

normal LED will turn off. See Section 4.4.2 for more details.

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 12

3.5 Low Battery Indication

A comparator circuit constantly monitors the input voltage level.

Should the voltage drop below 4 Volts, an audible “chirp” will

alert the user. Low batteries should be removed or replaced

immediately to prevent damage to the unit.

Fig. 2: Block Diagram

Assembly, installation and operation

Page 13

5118B…_002 − 150e-10.18

4. Assembly, installation and operation

4.1 Unpacking

Unpack the instrument and inspect it for any visible damage

caused during shipment.

4.2 Connections

This section provides information on connector locations for

power and input/output signals. Information on cable types

is also provided.

4.2.1 Signal Connections

Connect the low impedance sensor to the BNC negative con-

nector on the rear panel identiﬁed as “Input.” Sensor power

is also supplied via this connector.

The conditioned output, without the DC Bias, is available

from the BNC Negative connector labeled “Output” on the

rear panel of the instrument.

Typical cables used with the 5118B are listed in Table 2. User

requirements may be different depending on equipment ter-

minations and the nature of the installation. Consult the data

sheets for the individual equipment to be connected for the

most complete information. Contact Kistler for cable conﬁg-

urations different from those listed.

Type Description

1631Csp Low Noise, 10 - 32 to BNC pos., specify length

1939Asp Low Noise, Weldable 10 - 32 to BNC pos., specify

length

1601sp Low Noise, BNC pos. to BNC pos., specify length

1761C(X) General Purpose, 10 - 32 to BNC pos., specify length

1511sp Output Cable, BNC pos. to BNC pos., specify length

Tab. 2. Kistler cables

4.2.2 Power Supply Connection

Power is supplied via a rear-panel jack; “DC in 6…28V.” The

5118B can be powered with a “wall mount” adapter, which

supplies DC power to the coupler. When using this power

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 14

supply, simply plug the power supply plug into the rear panel

jack of the 5118B.

The 5118B is designed to operate from a variety of DC power

sources. This can include a regulated power supply, vehicle

power (automotive, aircraft), etc. If multiple couplers are

mounted in a rack the user may elect to use one common

supply. When using an external power supply, the optional

Kistler accessory cable (55131496) is recommended.

The cable is 6 feet in length, terminated at one end with

a standard 2.1 × 5.5 mm concentric power connector and

pigtails at the other end.

The unit is protected from excessive voltage and polarity

reversal. See section 3.1 for details about this feature.

4.3 Battery operation

4.3.1 Installation and operation

The 5118B can be operated from four, 1.5 Volt, AA size dry

cell batteries. The following batteries can be used.

Battery Type

Carbon-Zinc

Alkaline-Zinc

Lithium-Manganese

Battery Life* (Hours)

* With sensor current set at 2mA

The battery is located in a compartment on the bottom of

the case. To install or replace the batteries, loosen the two

screws that hold an aluminum cover in place and lift it off.

The proper polarity of the batteries is shown in the battery

compartment. Battery reversal, will not damage the coupler,

but will result in short battery life, failure of the coupler to

operate, or battery leakage due to cell reversal.

Warning: Residue from battery leakage should be removed

promptly and thoroughly from any surface with a damp cloth

since it is caustic (potassium hydroxide, KOH) and corrosive.

Caustic burns from alkaline cells must be washed promptly

with large volumes of water and receive immediate medical

treatment to neutralize the caustic effects. Do not get battery

residues in or near the eyes.

Assembly, installation and operation

Page 15

5118B…_002 − 150e-10.18

4.3.2 Battery back-up

If the coupler is going to be operated using external power

(DC source or power adapter), the user may remove or keep

the batteries in the unit. If batteries are installed in the unit,

the user will have the added advantage of an uninterruptible

power source.

The coupler’s internal power supply contains an automatic

power switching circuit. This circuit automatically switches

between the internal batteries and the input power plug on

the rear panel. As long as the input voltage to the rear plug is

higher than the battery voltage, the unit will derive its power

from the external source. Should this input voltage drop below

battery voltage, the unit will switch to the internal batteries

provided the internal batteries voltage level is 4 volts or higher.

In the event that the unit’s batteries are low, applying outside

power turns off the low battery warning.

If batteries are left in the unit during AC operation, the user

should periodically check both the electrical and physical con-

dition of the batteries and observe the caution in Section 4.3.1.

4.4 Front - rear panel controls and indicators

4.4.1 Power switch

The power switch is located on the rear panel. See Section

1.1 for precautions

4.4.2 Bias indicator

All units are equipped with front panel LEDs that display the

unit’s bias voltage level. A bias fault indication can give the

user clues as to possible problems in the measuring system:

The green “Normal” LED indicates that the bias voltage

is within the normal limits of 2 to 21 Volts. The other

LED’s are identiﬁed as “Low” and “High.”

A red “High” indication is usually caused by an open or

disconnected cable. If replacing the cable does not solve

the problem, the sensor is most likely defective.

A red “Low’' indication is caused by a short in the cable

or sensor. If a “Low’' indication is detected, disconnect

the sensor. If the bias voltage remains low, replace the

cable. If the bias voltage goes “High” the short is in the

sensor.

Exception Note

Power Supply/Coupler Type 5118B1 and 5118B2

5118B…_002 − 150e-10.18Page 16

The 8614A500, 8616A500, and 8694M1 Model Acceler-

ometers have a lower output bias than standard Piezotron

Sensors. This bias may be below the sensor’s nominally rated

4 volt level and may cause the 5118 Low Bias LED to become

lighted (Red), indicating a short.

The accelerometer’s actual bias level can be checked by using

a voltmeter with an input impedance of at least 1 meg ohm.

The meter must be connected to the input BNC connector on

the back panel of the coupler by using a Kistler Model 1743

BNC Tee Coupling. The accelerometer must also be connected.

A normal operating bias level for the three accelerometers

will be in the range of 2.5 to 5 VDC.

4.4.3 Unit gain

A front panel slide switch “Gain” selects the unit gain. Gain

is either X1 (unity), X10 or X100. When changing gain, the

unit will be ready for operation in 2 to 3 seconds because of

the “Rapid Zero” feature (see Section 3.2).

Increasing the gain effectively increases the sensitivity of the

measuring chain by the factor indicated (X10, X100). As an

example; if an accelerometer has a sensitivity of 10 mV/g

and the 5118B2 gain is set at X10, the actual sensitivity of

the measuring chain will appear as 100 mV/g at the coupler’s

output. There is no signiﬁcant difference in the noise level

between X1 and X10. The ampliﬁer noise will contribute 5mV

RMS on the X100 range.

4.4.4 Highpass ﬁlter

A two position front panel slide switch is provided on the

5118B2 for the selection of the low frequency cut-off point.

This switch is labeled “HP Filter.” A selectable single pole

(-3dB per octave) highpass (HP) ﬁlter is included in the Type

5118B2 while the cutoff frequency is ﬁxed at 0.03Hz on the

5118B1 version. This feature allows the user to select the

-3dB low frequency cutoff point (0.03Hz or 0.006Hz.). The

approximate relationship between the frequency (-3dB point)

and the time constant (1:) can be represented by:

f-3dB ≈ 0.16 ÷ τ

Since the -5% frequency cutoff point is generally of greater

interest in sensor applications, the following equation can

be used:

f-5% ≈ 0.5 ÷ τ

Assembly, installation and operation

Page 17

5118B…_002 − 150e-10.18

The time constant (TC) is inversely proportional to the cutoff

frequency. Decreasing the cutoff frequency will increase the

time constant.

For most applications a cutoff frequency of 0.03Hz (TC = 5

seconds) is recommended. The lower frequency provides a time

constant of 25 seconds which is useful for making quasistatic

measurements with force or pressure sensors.

It should be noted that the actual overall time constant is

afunction of the coupler’s time constant and the time constant

of the attached sensor. The actual sensor time constant is

usually measured and furnished on the sheet. The overall time

constant (τTotal) can be estimated by the following equation:

τTotal = (τ1 X τ2) + (τ1 + τ2)

Where:

τ1 = Time constant of the sensor (in seconds)

τ2 = The selected time constant of the coupler

(always 5 seconds for the 5118B1).

4.4.5 Rear panel

The following controls and receptacles are located on the rear

panel of the 5118B going from left to right:

“Output” – BNC connector provides the conditioned

sensor signal for connection to a readout instrument

(oscilloscope, meter, etc.)

“Input” – BNC connector is provided to connect a low

impedance, voltage mode sensor.

An “Off – On” slide switch is used to turn the unit on

or off.

The “DC in” plug is used to furnish DC power if the

internal batteries are not being used.

Fig. 4: Rear panel of the 5118B series of couplers showing

the power switch, power connector and input/output

connectors

Page is loading ...

Kistler 5118B2 Owner's manual

Brand: Kistler

Model: 5118B2

Type: Owner's manual

Download PDF

report

Kistler 5118B2 Owner's manual

Kistler 5118B2 Owner's manual

Related papers

Other documents