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Model 1270:
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INSTALLATION
The Model 1270 simply snaps into a standard DIN panel cutout (dimensions are given under Outline
Dimensions). The unit operates with a novel position sensor called magnetostrictive (refer to the section on
Theory of Operation). The position transducer consists of a stainless steel shaft with a magnet that is free to
move along the shaft. The Model 1270 measures the absolute distance that the magnet moves along the shaft.
A number of different magnet configurations are available, including floats. Consult the factory for more
information. The remaining wiring connections are explained separately in the following sections.
THEORY OF OPERATION
The Model 1270 is a precision instrument that measures position by timing the total propagation time from
the generation of a current pulse to receiving a reflected torsional wave on a magnetostrictive material. The
propagation time of the torsional wave depends on the position of a magnet that is placed around the
magnetostrictive material. Therefore, the propagation time is an accurate indication of the absolute position of
the magnet around the magnetostrictive material. The Model 1270 performs a digital signal processing algorithm
that converts the propagation time to a digital display and analog output corresponding to linear position or
velocity of the moving magnet.
OPERATION
The front panel keypad is used to select one of two scale factors, zero the display, set the display to a
predetermined value, or to clear the latched relay outputs. The analog output can be programmed to provide
an electrical output corresponding to a particular range of linear motion.
Applications
Applications
The Model 1270 was designed to replace linear potentiometers, LVDTs, inductosyns, linear optical encoders and linear magnetic encoders where precise linear position monitoring is required. In particular, the Model 1270 provides an absolute position monitor in the price range of incremental position monitors. This product can be used for position monitoring in machine tool applications, such as woodworking,punchpress and specialty machines; industrial measuring applications, such as liquid level and valve position; and other critical linear position measurements that require precise and stable absolute position monitoring. The unit can also be used to monitor the linear velocity of a moving object. It can be programmed to provide relay limit outputs at various positions. Additional outputs are available through an interface port.
Capabilities
Capabilities
Several remote 1250B monitors may be driven from the same 1265 transmitter.
- A remote 1250B monitor can be up to 1200 feet away when wired with 16 gauge wire
- With heavier gauge wire this distance can be up to 1 mile
- Fully sealed, weatherproof construction
- Retrofit any existing LTC or V/R in the field
Features
Features
Use of semiconductor technology provides priceto- performance ratio never before achieved in linear position monitoring systems.
Uses a rugged, absolute magnetostrictive transducer - does not require rezeroing or periodic recalibration. Display accuracy is better than 0.05% of full scale. Explosion-proof and waterproof transducers are available.
Simultaneously provides visual panel indication, proportional analog output and digital interface.
All critical parameters can be programmed by the user, including two different scale factors, analog output endpoints and relay limits. All programmed data is stored during power failures.
Operates from a self-contained power supply.
Digital measurement technique assures long, trouble-free performance, unaffected by power failure or electrical interference.
AVAILABLE OPTIONS
There are a number of options that can be ordered to enhance the basic unit:
- Analog Outputs
- BCD Outputs
- RS-232 Serial Interface
- Two Internal Relay Outputs
- External Relay Outputs
Refer to the Operating Manual or consult the factory for more information.
Specs
Specifications
| INPUTS | |
|---|---|
| Sensor | Self Powered Magnetostrictive Probe Interface |
| Programming | Programming Mode is selected by shorting Terminals 3 and 4 |
| OUTPUTS | |
| Display | .5-digit red light emitting diode (0.56 inch height) |
| • Viewing Distance | 23 feet |
| • Update Rate | 10/sec. for position; 3/sec. for velocity |
| Options | (see ordering information below) |
| • Analog Outputs | |
| • 5-digit BCD (multiplexed) | |
| • RS-232C | |
| • Dry contact relay HI/LOW limits | |
| • Programmable relay outputs via external relay panel | |
| STATIC PERFORMANCE | |
| Display and Output Accuracy @ 25°C | .±0.05% of full scale |
| Additional error (0-50 C) | .±0.005% of full scale |
| DYNAMIC PERFORMANCE | |
| Settling Time (full scale) | .5 mSec (MAX) † |
| Band Width | .200 Hz † |
| POWER | |
| Voltage Requirements | 117 VAC Std. or 234 VAC Optional ±10% |
| Power Dissipation | 8 Watts (MAX) |
| Frequency Range | 47-63 Hz |
| MECHANICAL | |
| Operating Temperature Range | 0° to +50° C |
| Dielectric Test | 1000 V rms for 1 minute |
| Case | Rectangular panel mounted meter |
Order
Ordering Information
Specify Model Number as shown below:
Note: Specifications subject to change without notice. Information furnished by Intelligent Controls, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Intelligent Controls for its use nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intelligent Controls.
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