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LP24 digital measuring amplifier
for all tensile force measuring devices, torque and force measurements.
The measuring chain consists of the electronic measuring amplifier and the electromechanical equipment for the capture of tensile or compressive forces or torques.
The amplifier has been designed as a surface-mounted device and features a 4-line display, 2-channel design, microprocessor-controlled input signals: channel A: 0..10 mV, channel B: 0..10 mV, channel A+B: 0..10 mV (synchronous signal conversion); output signals: 0..10 V, 0..20 mA, 4..20 mA.
Permanent synchronous import and synchronous output of the signals from channels A, B and A+B.
The measuring sensors are isolated from the system earth and from the signal processor.
For basic amplification, the input amplifier can be switched with a reed relay.
Dynamic measurement as an option at f = 1 kHz.
PID controller for tension/torque/dancer control (optional).
Operation via membrane keyboard or programming software for Windows (included in the scope of supply) via serial interface, data logger for graphics-based evaluation of analog signals, 19" cassette enclosure with front panel 3 U/21 UP, snap-on foot for rail mounting.
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Technical data
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resistance
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120...800 Ohm
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Bridge supply
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5 VDC
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Temperature influence on bridge supply
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< 2.1 mV/K
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Sensitivity
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1 mV... 0.1 V adjustable
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Appropriate amplification
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1....2.000 (12.000)
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Input resistance
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> 1 MOhm
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Linearity error
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< 0,1 %
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Measuring frequency range
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0...5 Hz with filter
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Output for indicating instrument
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1 mA indicating instrument
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Voltage output
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0...10 VDC Load resistance R > 1 kOhm
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Current output
0(4)...20 mA
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Load resistance R < 500 Ohm
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Zero suppression
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± 15 mV
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Power supply
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24 VDC
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Power consumption
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max. 8 VA
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Degree of protection
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IP20
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Chassis
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19" rack-mounted enclosure, 3 U/21 UP, with snap-on foot
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connection via terminal strip
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Signal output
Signals are output on three DA converters with filtering:
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Channel A
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:
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Converter 1
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Channel B
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:
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Converter 2
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Channel (A+B)/2
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:
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Converter 3
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Output signal standard
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:
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Adjustable
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Absolute
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Positive bridge signal
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Bridge signal
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Further features:
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Separate current loop
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Two additional analog inputs
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Scaleable display
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Online actual value display on a PC
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Operation via RS 232 interface/USB port as an option
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Scaleable data logger function; additional text editor
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Options:
Option 1: Limit frequency 1 kHz includes modification of input low-pass filter to maintain the scanning theorem as well as modification of the low-pass filter on the DA converter side; software adaptation of the signal processor; as a result, the measuring amplifier has a single channel.
Option 2: Modification of low-pass filter to change the input and output frequency responses.
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