HPS-2 series of multi-channel high-frequency switching potentiostat

Introduction 1 Overview 1.1 Usage HPS-2 multi-channel potentiostat is mainly used for pipes, cables, storage tanks and other metal structures or equipment to implement shunt impressed current cathodic protection. 1.2 Main features: 1.2.1 device adapted to each metal body without interconnected implement common anode type cathodic protection branch, each branch can be adjusted independently. 1.2.2 brightest have run mode automatic switching function, when, due to external reasons which can not be implemented all the way to the protection of constant potential, this road will be automatically switched to the current value of the pre-set to a constant-current protection; when unable to implement permanent When the flow protection will automatically cut off the output. 1.2.3 brightest have interference and lightning performance, greatly improving the reliability of equipment operation. 1.2.4 brightest possess self-test function, easy to determine the reasons for failure. 1.2.5 Instruments and the brightest are used push-button operation, multiple digital multi-parameter table also shows, simple and intuitive control. 1.2.6 brightest can adapt fast break detection. 1.2.7 with remote data transmission, remote control functions and standard industrial signal point to point interface for easy connection to the RTU, intelligent management. 2 Technical Requirements: 2.1 Environmental conditions Pressure: 60 ~ 120KPa Ambient temperature: -30 ℃ ~ + 50 ℃; Relative humidity: 15% ~ 90% RH; 2.2 electrical conditions AC power supply: Power supply voltage range: single-phase 220V ± 10% or three-phase 380V ± 10% Power frequency range: 47.5 Hz ~ 63 Hz 2.3 Safety Performance 2.3.1 Insulation resistance: power input, the cathode, the zero position on the chassis insulation resistance greater than 10 MΩ. 2.3.2 Dielectric strength: the power input, between the chassis can withstand both 1500V (RMS) voltage of 50Hz, which lasted one minute, no flashover or breakdown. 2.4 Basic technical performance (each way) 2.4.1 Output voltage range: 1% to 100% of rated output current range 2.4.2: 1% to 100% of nominal 2.4.3 ripple factor: 2.4 at full load is less than 2%. 4 constant potential range: 0mV ~ -3000mV range continuously adjustable constant potential 2.4.5 Accuracy: control potential and protection potential of error is less than 5mV. 2.4.6 Input impedance: the reference input of the input impedance is greater than 2MΩ. 2.4.7 Anti-hum: 50 V, 50Hz 2.4.8 constant current preset range: 1% to 100% of rated output current 2.4.9 Constant Current Accuracy: within the rated load range, the output voltage at the rated range internal changes, the output current can be set at a constant value, the current precision of less than 2%. 2.4.10 self-test function: test the brightest in their working status without connecting the outside, easy to fault identification. 2.4.11 operating mode automatically switches: When the instrument is the way in which the reference electrode failure due to other reasons can not work and the constant potential lasts more than 20 seconds, the road will be automatically switched to the constant current mode. 2.4.12 Recovery: restore power after a power interruption, each channel can operate at a constant potential protective potential value of the original set. 2.4.13 fast-break performance: can adapt quickly scan detection DCVG (eg: Instrument adapt through 0.8S, 0.2S off intermittent supply of test status). 2.5 Performance 2.5.1 overcurrent protection: AC input a, the instrument is equipped with fast fuses and DC circuits. b, when the instrument is the way in which the output current rating of 115% to reach 125% of the time, the instrument automatically cut off the output current and alarm, automatic recovery after delay 10s output. Such as overcurrent reason not eliminate, the instrument automatically repeat the above process protection. 2.5.2 undervoltage protection: When the supply voltage drops below 75% of the rated input voltage, the instrument automatically stops the output; when the power supply voltage rise, the instrument automatically resume normal operation. 2.5.3 Overheat protection: When the instrument due to external causes of the internal temperature exceeds a predetermined value, the instrument automatically stops the output. 2.5.4 lightning protection: a, instrument inputs, the output has lightning protection. b, instrument output anode, a cathode terminal on the chassis can withstand the magnitude of 15KV, pulse width 25μs, repeat cycle 1 ~ 5s, the induction time of 1min simulated lightning impact. 2.5.5 Alarm: When the instrument is the way in which a fault occurs on the job, including the output voltage gauge, output current limit, the protection potential gauge, temperature gauge and so on, the red light is on, the instrument will automatically stop the output, and issued alarm beep for 2 minutes after the automatic shutdown. 2.5.6 reverse polarity protection: the anode and cathode polarity reversal, the road turns off automatically. 2.6 Communication Interface 2.6.1 point communication interface (per channel) 2.6.1.1 * Remote control potential given interface: potential remote control interface input 4 ~ 20mA standard industrial signal, when the signal is less than 3mA, potential control the instrument itself is set value, when the signal is greater than 3.8mA, the value of potential control switch for remote control values. 4 ~ 20mA signal isolation converted to 0 ~ 3000mV potential control value, conversion accuracy of better than 0.3%, isolation voltage ≥500V. 2.6.1.2 current signal output interface: the output current value (0 ~ rated) into standard industrial signal (4 ~ 20mA), conversion accuracy of better than 1%, the interface load is less than 600Ω, interface isolation voltage ≥500V. 2.6.1.3 voltage signal output interface: the output voltage value (0 ~ rated) into standard industrial signal (4 ~ 20mA), conversion accuracy of better than 1%, the interface load is less than 600Ω, interface isolation voltage ≥500V. 2.6.1.4 potential signal output interface: the protection potential value (0 ~ 3000mV) is converted into standard industrial signal (4 ~ 20mA), conversion accuracy of better than 1%, the interface load is less than 600Ω, interface isolation voltage ≥500V. 2.6.1.5 remote control switch machine interface: remote control interface accepts 24V turned positive pulse signal, the instrument is turned; remote control when the shutdown interface accepts 24V positive pulse signal, the instrument off; pulse width is not narrower than one second, the interface isolation voltage ≥ 500V. 2.6.1.6 remote control off test interface: power test interface for + 24V input level high. When the interface input high, the instrument is working in test mode power-off, low, instruments for the normal output. Interface isolation voltage ≥500V. In the power-off state tests, the output is repeated through the 12s 3s off the batch process, the on / off clock error is less than 0.1 ‰. 2.6.1.7 * operational state of the interface: Run signal interface contact signal output, "+", "-" Closed for the instrument end up signal, "+", "-" open-end shutdown signal to the instrument. 2.7 indication and operation 2.7.1 Each instrument is equipped with high-precision digital meter, which can display the output voltage, output current, protection potential, the power supply voltage and other parameters, display accuracy of better than 0.5%. While using color indicators show the status of each job. 2.7.2 Instrument switch, as well as the work using push-button operation. 2.8 Terminals 2.8.1 instrument equipped with AC power input terminal block, the total output of the anode and cathode of each output, zero access overcast, such as the reference input terminal, the terminal installed in an epoxy glass cloth board, The size of the terminal to meet the requirements of the cable cross-sectional area of ??that instrument output specifications. 2.8.2 Instrument wiring board equipped with point to point communication interfaces: the brightest point standard industrial signal interface can be connected to RTU, support for remote monitoring and intelligent management. 2.9 chassis and coated chassis with a thickness greater than 1.5 mm cold-rolled steel sheet forming, surface electrostatic spray anti-corrosion treatment, protection class IP42. 2.10 Dimensions: height 2000mm, base height of 100mm, width of 800mm, depth of 600mm.