BA 661 / IP20 BA 661 / IP66 BA 661 / IP68 BA 661.01

Strain Gauge Measuring Amplifier
BA 661 / IP20
BA 661 / IP66
BA 661 / IP68
BA 661.01
Original of the
Manual
BA 661 / IP20
BA 661 / IP66
BA 661 / IP68
BA 661.01
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Marschnerstraße 26 01307 Dresden
fone (03 51) 44 55 30 fax (03 51) 44 55 555
www.ast.de
1
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
Table of contents
1. Safety precautions .......................................................................................1 1.1. Field of application .........................................................................................1 1.2. Installation ......................................................................................................1 1.3. Maintenance ..................................................................................................1 2. Function ........................................................................................................2 3. Specifications...............................................................................................3 3.1. Technical Datas .............................................................................................3 3.2. Circuit diagram ...............................................................................................3 3.3. Dimensions / Connections .............................................................................4 4. How to connect force transducers .............................................................6 4.1. Installation recommendations ........................................................................6 4.2. How to connect signal output .........................................................................6 4.2.1. Parallel connections of outputs ......................................................................6 4.2.2. How to connect supply voltage ......................................................................6 4.2.3. Trigger input ...................................................................................................6 5. Operation ......................................................................................................7 5.1. Calibration of BA 661 with ASTAS software ..................................................7 5.1.1. Programming of sensor detail and analogue output.......................................8 5.1.2. Range settings ...............................................................................................9 5.2. BA6XX DAC settings ...................................................................................14 5.3. LED-Status ..................................................................................................15 6. EC Declaration of Conformity ...................................................................16 Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
1
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
1.
Safety precautions
In this operating manual, the installation, putting into operation and the operation
itself of the Strain Gauge Bridge Amplifier BA 661 is described. It is assumed that all
measures are taken by qualified staff only that has adequate knowledge in the fields
of measuring and control engineering.
ATTENTION!
Any non-compliance with these safety precautions may result in severe
damage to property and health.
1.1.
Field of application
The Strain Gauge Bridge Amplifier BA 661 has been designed to the purpose of
amplifying the output signals of sensors with metal-foil strain gauges, preferably force
transducers and transform them into standard signals. Any other application is
regarded contrary to the intended purpose. The manufacturer does not accept any
liability for damages resulting from such inappropriate usage. In this case it is the
user alone who has to bear the risk.
Type BA 661 must not be used as the sole means to prevent dangerous conditions of
machines and plants. All machines and plants must be constructed in such a way
(e.g. by using mechanical stops, limit switches) that a condition of failure does not
result in a situation of severe danger.
It must be made sure that any erroneous setting or malfunction of the unit or its
breakdown cannot cause damage or be a risk to the operating staff or other persons.
1.2.
Installation
The unit must be installed and connected in compliance with the current DIN- and
VDE-standards. Supply cables and signal lines shall be installed so that interference
signals such as electrical interference do not have any adverse effects on the
function of the equipment.
1.3.
Maintenance
The device does not contain any components that require maintenance. Repairs
shall be carried out by the manufacturer only.
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 1 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
2.
Function
The Strain Gauge Bridge Amplifier BA 661 is a digital amplifier for the low-drift
amplification of the output signals of sensors with metal-foil strain gauges, preferably
force transducers to supply a standard signal of (-10/0...10) VDC or (0/4...20) mA.
An internal voltage source provides the stabilized feeding voltage for the sensor. The
power is supplied by an unstabilized source of (9...36) VDC. The Strain Gauge
Bridge Amplifier is delivered in a case for standard rails in accordance with DIN EN
50022-35 or optional Aluminium die-cast or Stainless steel housing.
The BA 661 is delivered with a factory setting for an input signal of 2mV/V and a
corresponding output signal of ± 10V or 20mA. The other input signal ranges
0.1mV/V to 7mV/V can be generated internally from the 2mV/V factory adjustments.
By an optically separated input, the zero-setting can be carried out by means of
a superior control and through the trigger input. The overload limit is not
affected by such a zeroing, which means that 100 % of the end-value
adjustment of the sensor remains as end value. An existing preload by a
container can thus be set zero.
page 2 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
3.
3.1.
Specifications
Technical Datas
Class of accuracy at input signal 2mV/V % FSR
Connection for strain gauge sensor
Bridge resistance /
range of input impedance
Ω
Input signal range (+Si/-Si)
mV/V
Excitation voltage (+Ex/-Ex)
VDC
*)
Norm output
Current output
mA
Voltage output
V
Load resistance
Ω
Measurement characteristics*)
Resolution of the A/D Converter
Bit
Filter
Hz
Error at S=2mV/V
Nonlinearity
%FSR
Noise (at measurement rate)
%FSR
Input sensitivity for 1 LSB
nV
Zero drift
%/ 10K
Power supply
Input range
VDC
Power consumption (without sensor)
W
Environmental conditions
Operating temperature range
°C
Storage temperature range
°C
Construction
Case
< 0.02 (typ.)
4- or 6-wire
58 ... 2000 (up to 6 load cells each 350 Ω)
0.1/ 0.25/ 0.5/ 1.0/ 1.5/ 2.0/ 3.0/ 4.0/ 5.0/ 7.0
±2.5
0/ 4 ... +20; 0 … 24
≤ 500
-10/-5 ... 0 … +5/ +10
≥ 1000
24
0.8 … 2000
0.0025
0.002 (0.8Hz) … 0.009 (2000Hz)
150
<0.01
9 ... 36
1
- 20 ... + 60
- 25 ... + 85
BA 661/IP66
BA 661/IP20
BA 661/IP68
BA 661.01
Plastic housing/ Aluminium
Stainless steel
DIN rail
die-cast
AISI304/AISI316
0.2
0.5
0.8
22.5x114.5x99
125x80x57
150x100x60
IP 20
IP 66
IP 68
Weight
kg
Dimensions (W x H x D)
mm
Environmental protection (EN 60529 /
DIN 40050-9)
Terminal block, wire size
mm²
0.14 ... 2.5
0.13 … 2.5
*)
configurable via standard USB (USB-A) interface and PC (Software included)
3.2.
0.13 … 2.5
Circuit diagram
Power supply
9 ... 36VDC
0V
Sensor
+Se
+Ex
+Si
- Si
2.Stab
A
D
C
-Ex
-Se
2’.Stab
Shi
EMC-Filter
1.Stab
µC
±12V
16-Bit
-DAC
Output
I Out
V Out
AG
T+ 24VDC
T - 0V
USB:
(ASTAS, Conifguration DAC, Filter)
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 3 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
3.3.
Dimensions / Connections
BA 661 / IP20
BA 661 / IP66 und BA 661 / IP68
BA 661.01
57
125
+SE
3
10
3
+EX
Ø5,2
2
3
4
2
4
+SI
6
-EX
Gruppe
1
1
5
5
-SI
IOUT
VOUT
4
AG
3
4
2
5
1
2
1
5
UB (+24V)
0V
6 -SE
Angewandte System Technik
plug
52
80
socket
113
page 4 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
Terminal connection
-Ex
-Se
+Se
+Ex
+Si
-Si
NC
SHI
AG
Vout
Iout
NC
24V
0V
Tr+
Tr-
Description
neg. Exitation voltage
neg. Sense signal
pos. Sense signal
pos. Exitation voltage
Sensor with 6-wire
pos. Signal
neg. Signal
not connected
Shield
Ground for output signal
Voltage output
Output signal
Current output
not connected
Supply voltage
Power supply
Supply voltage ground
Trigger 24V
Electrically isolated input
Trigger 0V
connection NC existing only for BA 661 / IP20
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 5 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
4.
How to connect force transducers
4.1.








Installation recommendations
Use shielded cables.
Use the largest possible cable cross section (error due to cable extension).
Lay the measuring lines separately from the power supply lines.
In particularly strong electromagnetic fields the connection of the force transducer
and the measuring amplifier to earth should be as short as possible.
Additionally, lay an equipotential bonding parallel to the measuring line.
Keep away from stray fields of motors, transformers and contactors.
Connect force transducers, amplifier, mains unit, and indicator / processor unit
with earth in one place only.
Set the slide switch for the sensing line (6- or 4-wire) according to the sensor
connection.
4.2.
How to connect signal output
The Bridge Amplifier BA 661 provides different output signals, depending upon the
setting of the slide switches (see 5.1.1.).
Either the current output or the voltage output can be used, not both at the same
time.
4.2.1.
Parallel connections of outputs
To form the sum, current outputs of several BA 661 can be connected in parallel. In
this case, 12V should not be exceeded at the standard output and the maximum load
(load resistance) be < 12 V / ∑Iout. Voltage outputs must not be connected in parallel.
4.2.2.
How to connect supply voltage
The supply voltage is connected to the terminal (24V) and to (0V). The bridge
amplifier is protected against voltage reversal.
4.2.3.
Trigger input
The BA 661 has an optically separate trigger input so that the zero-setting can be
carried out by means of a superior control. The overload limit is not affected by such
a zeroing.
The function is started by a 24 VDC trigger impulse.
page 6 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
5.
5.1.
Operation
Calibration of BA 661 with ASTAS software
After connecting the BA 661 via the included USB cable to PC / notebook the following home
screen appears when connecting the BA 661 with ASTAS:
After successful connecting to the BA 661 the ASTAS software will read out and display the
current measurement cyclically. The status line of the ASTAS screen will display of the data of
the connected BA 661.
In data in the shown the example is:
Type: BA661
Firmware version: V0.2.0
Hardware number: HW5312
Serial number
USB-connection
Name of the measurement range
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 7 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
5.1.1.
Programming of sensor detail and analogue output
Menu: Device  Setup  Additional settings BA6XX
To program the measurement range and the filter of the BA 661 you can chose from
the following menu:
Initial input sensitivity of range
[mV/V]
Filter [Hz]
DAC-Output
0,1
0,25
0,5
1,0
1,5
2,0
3,0
4,0
5,0
7,0
6,25
12,5
25
50
100
200
400
800
1600
3200
0 … 10V
0 … 5V
-10 … 10V
-5 … 5V
0 … 20mA
0 … 24mA
4 … 20mA
Input settings
Output settings
Programming of
offset and gain of
the DAC will be
done in the menu
„BA6XX
DAC
settings“ (chapter
5.2)
Save into the BA 661 with „write“ after settings are completed.
page 8 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
5.1.2.
Range settings
Screen for range settings:
Here you can set the text for the measurement value, i.e. „KN“.
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 9 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
In the "Parameters" you must enter the nominal load and the sensitivity of the sensor.
In this example "100.00 KN" at 2mV/V output (theoretical calibration).
In the "Overload / Underload" you enter the limits
i
ATTENTION!
In case of exceedance of the input signal of > "Overload [%]", the analogue
output is set to the maximum positive initial value.
In case the input signal lies in the range between "Underload[%] and 0%,
the minimum analogue signal is released at the unipolar voltage output and
the current output respectively (see too 5.3)
Now save using the "Write setup to device" button.
If necessary, the amplifier can be adjusted at zero load and nominal load points. This menu
can be found at menu: Device  load calibration.
If a new calibration is performed all existing calibration points (including additional points) must
be deleted first, by pressing "OK" to "Delete calibration".
You will be asked to confirm that the power supply is connected.
page 10 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
1. No load at the load cell
and save zero calibration
2.
Display showing „stored
3.
Put load to the loadcell and
putt he correct value in, store
with „OK“
4.
Wait until values are
transferred
5.
Store and close
1.
No load at the load cell and
save zero calibration
2. Display showing „stored”
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
3.
Put load to the load cell and
putt he correct value in, store
with „OK“
4.
Wait until values are
transferred
5.
Store and close
page 11 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
1.
No load at the load cell and
save zero calibration
2.
Display showing „stored”
3. Put load to the load cell
and putt he correct value
in, store with „OK“
4.
Wait until values are
transferred
5.
Store and close
1.
No load at the load cell and
save zero calibration
2.
Display showing „stored”
3.
Put load to the load cell and
putt he correct value in, store
with „OK“
4. Wait until values are
transferred
5.
page 12 of 16
Store and close
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
1.
No load at the load cell and
save zero calibration
2.
Display showing „stored”
3.
Put load to the load cell and
putt he correct value in, store
with „OK“
4.
Wait until values are
transferred
5. Store and close
Linearization:
If the measured values between zero and rated load should deviate from the real load, up to
four additional points can be set to increase the measurement accuracy. These measuring
points can be made in any order, similar to the input of the zero point and end point. After
entering all of the calibration points, the result must be stored.
If a new calibration is performed all existing calibration points (including additional points) must
be deleted first, by pressing "OK" to "Delete calibration".
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 13 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
5.2.
BA6XX DAC settings
In this menu you can adjust the output signal without any re-calibration.
Menu: Device  BA6XX DAC settings.
These controls cover the complete range of the DAC and should be adjusted in small steps of
max. 50 increments.
If the measurement range is changed, all DAC changes will be deleted.
Output unipolar (U/I)
Output bipolar (U)
-120%
Input
120%
Sensor mV/V
Graph 1 Output signal in case of error (bipolar)
Output signal -5…5V, -10…10V
page 14 of 16
-120%
120%
Input
Sensor mV/V
Graph 2 Output signal in case of error (unipolar)
Output signal 0…5/10V, 0/4…20/24mA
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
5.3.
LED-Status
LED display
Explanation
Error description
Green
Ready for operation
 No error
 Error at connection of sensor lines
 Cable break in sensor line
Red 1x flashing
ADC-Overload
Red 2x flashing
Indicates overload
or underload
 Exceed of maximum load of
"Overload[%] of nominal sensitivity, or
exceed minimum load "Underload [%]
(see too 5.1.2)
Red 4x flashing
Output > 100%
 The amplification at the output is set too
high.
Red 5x flashing
Current output
open or
overheating DAC
Red 6x flashing
Hardware error
 Switch for 6- and 4-wire not accordingly
connected
 Output side not closed
 Cable break at output
 Thermal overheating - cooling necessary
 General error – restart necessary
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik
page 15 of 16
Manual
BA 661/IP20, BA 661/IP66, BA 661/IP68, BA 661.01
6.
EC Declaration of Conformity
page 16 of 16
Data subject to change. 10/2016
A.S.T. - Angewandte System Technik GmbH, Mess- und Regeltechnik