Current Loops
See Also: Loop, HIL, Loop Testers
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Calibrator Process
VA70034
Shanghai Yi Hua V&A Instrument Co., Ltd. CO.,LTD
Loop calibrator This Calibrator is use to measure or output 0 to 24 mA DC current loop, and 0 to 20 V DC voltage.
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4-port Serial Interface, Modular, With/without Optical Isolation, 3.3V/5V, With 9-pin Connectors
APCI-7500-3/4C
*This model has 4x 9-pin D-Sub male connectors on 2 brackets*RS232, RS422, RS485, 20 mA Current Loop*Modular structure through SI modules*With or without optical isolation*Mode configuration free for each port*128-byte FIFO-buffer, common interrupt*Transfer rate programmable up to 115,200 Baud*Option: up to 1 MBaud for RS485 and RS422*Automatic direction recognition for RS48*Mode: configurable RS232, RS422, RS485, 20 mA Current Loop (active, passive) with or without isolation (SI modules)
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Opto-Isolated Current Loop Signal
4029
SPECTEC Innovative Sensor Solutions
SPECTEC's Model 4029 digital opto-isolated current loop signal conditioner prevents ground loops and interrupts any galvanic signals riding on magnetic speed sensor's output signal.. This signal conditioner converts magnetic, variable reluctance and inductive sensors' sinusoidal signals into a 4-20 mA output suitable for interfacing with process control units, dataloggers, flow controllers, and computers.
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Loop-Powered Digital Panel Meter
88-PRO
The 88-PRO Process Meter may be connected directly to a 4-20 mA, 10-50 mA or 1-5 mA current loop, with no need for additional power to the meter. This is because the meter is powered directly by the current loop, developing a maximum voltage drop of 2.5 V.
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PXI/PXIe Analog Output/Current Loop Simulator Module - 8 Channel
43-765-003
The 41/43-765-003 is an 8-channel Analog Output Module designed to meet the requirements of industrial control applications utilising current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signalling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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PCI Express 16 Reed Relay Output
8004He
The 8004He PCI Express digital I/O interface provides 16 optically isolated inputs and 16 Reed relay outputs. The isolated inputs protect the PC and other sensitive equipment from the voltage spikes and ground loop currents that are common to industrial environments. The outputs provide high quality, long-life, dry contact switch closures suitable for low-current applications.
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Resistance Tester With Leakage Current (Loop Current)
GT00WD00ZY
*screen display*Double protection insulation*Non-contact measured resistance, safe, fast
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Measurement & Simulation
Highland Technology offers a wide array of tools for measurement, simulation, and control. Tachometers, thermocouples, RTDs, precision voltages, current loops, strain gauges, and more can be measured or simulated by Highland's products.
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PXI/PXIe Analog Output/Current Loop Simulator Module - 12 Channel
43-765-002
The 41/43-765-002 is a 12-channel Analog Output Module designed to meet the requirements of industrial control applications utilising current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signalling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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Current Loop Data Loggers
This data logger can measure and store 4~20mA DC current readings automatically. The professional applications can be provided by the PC software DGraphTM. Logger status, alarm indication and low battery indication are via flashing red/green LED and yellow LED. The button on housing can be used to start logging, or confirm and clear LED alarm when LED alarm is hold status.
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Microwave Moisture Meter
RX-95
The system works based on the absorption of microwave energy by water molecules contained inthe x-rayed material. It is a non-contact, non-destructive method of instant measurement of water content - used for materials such as coal, flour, grain, cement, seeds, sugar, etc. Thanks to high measurement sensitivity (resolution greater than 0.01% of water content by weight), short measurement time (about 5 times/sec.) and repeatability of measurement - the system is suitable for continuous measurement of material moisture, e.g. on conveyor belts and its recording on a PC or using a 4-20 mA current loop.
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Loop Meter
MZC-310S
The MZC-310S is a professional portable meter for testing electrical installations with over-current circuit breakers. The instrument measures short-circuit L-PE, L-N and L-L loop and prospective short-circuit loop current. A measurements can be done either with low testing current (up to 42A) with 2-pole method or high testing current (up to 280A) with 4-pole method that enables measurements with very high accuracy and resolution.
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DC current Sensors
CTH
The CTH sensors convert dc current to an isolated voltage output, the CTHR sensors convert ac current to a dc output signal proportional to the Arms. All popular process control voltage and current loop outputs are available. Through hole or split core options mean that connection is non-intrusive and straightforward. The available input range of the CTH sensors is any value from 5A to 6000Adc.
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Analog & Digital I/O Modules
USB analog and digital I/O modules are a complete family of data acquisition modules for use in process control systems. The analog input modules can measure process signals such as DC voltage, thermocouples, 4-20mA current loops, discrete contact closures.
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4-Port Serial Interface
APCI-7500-3
This Model has a 37-pin D-Sub male connectorRS232, RS422, RS485, 20 mA Current LoopModular structure through SI modulesWith or without optical isolationMode configuration free for each port128-byte FIFO-buffer, common interruptTransfer rate programmable up to 115,200 BaudOption: up to 1 MBaud for RS485 and RS422Automatic direction recognition for RS48Mode: configurable RS232, RS422, RS485, 20 mA Current Loop (active, passive) with or without isolation (SI modules)Transmission mode asynchronous, full, half duplexTransfer rate: progr. up to 115.2 kBaud up to 1 MBaud on requestProtocol: 5, 6, 7 or 8-bit character 1, 1? or 2 stop bitsParity: even, odd, none, mark or spaceInterrupt lines: automatic through BIOS
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Digital LOOP/PSC/EARTH Tester
1824 LP
Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Measures Earth Resistance without the need for poles in the ground or external measuring wires.● Earth measurement uses the real earth current path and the current generated by the electric network, without the need for any disconnection.● The Earth Resistance displayed is exactly the earth resistance that the earth current will need to go through if an earth fault occurs. (you do not need to add all the bonding points and connection paths)● Displays voltage supply at the transformer(Line to Neutral), without loading the transformer.● Single one smart push button operation; ON, Scroll through results and menus.● Checks wiring integrity (LEDs).● Auto-off / Auto-ranging (software range).● Color-coded test leads.● Combined prospective short circuit current, loop, and earth tester.● Loop test for L-E and PSC between L-N.● Voltage test L-N.● Display can be customized for large orders.
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Loop Meters
The CM-1TB + XL-1 are modern digital current loop-powered meters that convert standard loop current to engineering units. They feature high accuracy and a large 0.6-inch LCD display. Proven reliability combined with low cost has earned these meters world-wide acceptance, with thousands in use.
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Temperature Transmitter
T4111
Transducer is designed for temperature measurement at C or F by means of an externaltemperature probe with Pt1000 sensor. Measured temperature is converted to linearized unified signal 4-20 mA. Measured values are displayed on LCD display. It is possible to switch OFF theLCD at all. Current loop has two-wire connection and requires power from evaluation device.
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Downloading Multifunction Tester
ET4500
The new ET4500 tester carries out all the tests needed to verify the safety of electrical installations in domestic, commercial and industrial wiring installations in accordance with the latest regulations.
can be used to carry out 3 wire earth testing and has on board memory to store and download all installation test results for documentation.
Everything about the new ET Series has been designed to save time and make testing easier.Fast, reliable high current and non-trip loop testing comes as standard together with a high level of input protection and a CAT IV safety rating .Supplied with a full range of accessories.
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Dual High Speed Power Supply
VX4620
Dual high speed power supplyLow noise linear output stage with 200 Vpp and 1 AProgrammable bipolar voltage and positive/negative current limitsStable control loop even on long load linesAuto sensing featureProgrammable slew rateProgrammable over GPIB, USB or RS232Fast rise and fall times due to integrated sink capability
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H/L Voltage Clamp Meters
High Voltage Current Transformation Ratio Tester breaks traditional structure, specially designed for high and low voltage first and secondary loop current, variable ratio, and current leakage test; apply the latest CT technology and mask digital integration technology, composed of special high-voltage clamp, low voltage clamp, host, high voltage insulation rod and monitoring software, etc; its wireless transmission test data can penetrate multiple building obstacles with a straight-line distance of 30 meters.
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Current Loop Supply Isolating Transmitter
Model TWS / TWS 2
Kusam Electrical Industries Limited
• Aux. Power AC 85 ~ 265V or DC 85 ~ 300V• High Accuracy 0.1% RO at 23 °C ± 5 °C• Output User Selectable• PC Plastic Case, DIN Rail or Wall Mounting• High Dielectric Strength (AC 1.5KV/Min, between Input / Output / Power)
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4-20mA Current Loop D/A Converters
ADI integrated solutions combine both the D/A converter and driver in one chip to provide the required output directly from the digital domain. Analog Devices’ portfolio of leading industrial D/A converters and drivers provides a range of programmable output ranges from standard 4 mA to 20 mA for current loop communication to ±10 V for actuator control. ADI industrial converters offer considerable control functionality and advanced on-chip diagnostics to maximize system uptime, as well as eliminate the need for costly calibration routines needed by some traditional discrete architectures.
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Loop-Powered Transmitters and Drivers
4-20mA
Loop-Powered Transmitters convert the output from proximity probes, seismic sensors, into a 4-20mA DC current, which is proportional to the input being measured. The transmitter converts the displacement or vibration signal to DC voltage and/or current for a DCS or PLC system. They control a 4-20mA current loop for a specified vibration range (ex. 0-5 mils peak-to-peak). The transmitters have a two-wire hook-up, powered solely by the loop current and have a power supply range of 15 to 36 volts.
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4-20mA Current Loop USB Data Logger
EL-USB-4
This data logger measures and stores up to 32,000 current loop readings over flashing red and green LEDs. The data logger features a pair of screw terminals and is supplied complete with a a 4-20mA d.c. measurement range. The user can easily set up the logging rate and start time, and download the stored data by plugging the module straight into a PCs USB port and running the purpose designed software under Windows 2000, XP or Vista
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Current Loop Adapter
OP-1C
This adapter supports current loop communications.The kit incorporates a communications circuit with photo-coupler isolation and constant-current power supply of insulated type, thus realizing not only monitoring but also easy communications testing with passive or active current loop devices.
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Digital LOOP/PSC/LOAD Tester
1825 LP
Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Measures the voltage drop as if 16A was flowing between Line and Neutral.● Displays voltage without current (V at 0A).● Display voltage as if 16A flowing between Line and Neutral (V at 16A).● Loop test for L-E● PSC between L-N.● Single one smart push button operation; ON, Scroll through results and menus.● Checks wiring integrity (LEDs).● Auto off/auto ranging (software range).● Combined prospective short circuit current, loop and load tester.● Display can be customized for large orders.
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PCI Express 16 Reed Relay Output
8004e
The 8004e PCI Express digital I/O interface provides 16 optically isolated inputs and 16 Reed relay outputs. The isolated inputs protect the PC and other sensitive equipment from the voltage spikes and ground loop currents that are common to industrial environments. The outputs provide high quality, long-life, dry contact switch closures suitable for low-current applications.
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Single Port Serial Interface
APCI-7300-3
*PCI interface to the 32-bit data bus. *Asynchronous communication adapter, 1-port serial interface*1 socket for SI modules*Modular structure through SI modules*Configurable as: RS232, RS422, RS485, with or without isolation, or 20 mA Current Loop (active, passive) with isolation*Addressing through software
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Multi Function Testers
Kyoritsu Electrical Instruments Works, Ltd.
Live circuit warning LED:Immediate illumination of a warning lamp if the circuit under test is live Auto Discharge:Allows fast and safe discharge of electrical energy stored in capacitive circuits following testing Integral overload protection on internal continuity and insulation test circuitry Autoranging 500V DC test voltage for insulation tests 200mA short circuit current on continuity ranges Loop and RCD Testing Wiring connection check LED''s:Immediate indication if wiring of circuit under test is correct Overheat Protection:Rapid detection of overheating of internal circuitry,display of warning signal to user and automatic halting of measurement Supply Voltage Indication:Can display supply voltage value in loop impedance mode Low Current Loop Impedance Test:Short duration low test current will prevent tripping of many passive RCDs
