HPS-1D high-frequency switching potentiostat

1 Overview 1.1 Introduction HPS-1D uses high-frequency switching 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 potentiostat power conversion technology using high-frequency switching power supply, no noise, small ripple, fast response, reliable work. 1.2.2 redundant structure, dual standby for each other, when the working machine automatic failover backup machine is running. 1.2.3 has a running mode automatic switching function, when, due to reasons outside of the instrument can not be implemented potentiostat protection, it will automatically switch to the current value of the native pre-set to a constant-current protection. 1.2.4 interference and lightning performance has greatly improved the reliability of the equipment. 1.2.5 with self-test function, easy attribution failure. 1.2.6 Instruments are using push-button operation, the LCD can display multiple parameters and working conditions, simple and intuitive control. 1.2.7 can be adapted to detect fast interrupt. 1.2.8 with data storage, remote, remote control functions and standard industrial signal point to point interface, and RS-485 interface for easy connection to a computer intelligent management. 2 Technical Requirements: 2.1 Environmental conditions Pressure: 60 ~ 120KPa Ambient temperature: -30 ℃ ~ + 50 ℃; Relative humidity: 15% ~ 90% RH; 2.2 electrical power frequency range conditions: 47.5 Hz ~ 63 Hz 2.3 2.3 safety performance. Insulation resistance: power input, the cathode, the zero 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 2.4.1 Output voltage range: 1% to 100% of rated output current range 2.4.2: 1% to 100% of rated ripple factor 2.4.3: 2.4.4 at full load is less than 2% constant potential range : within 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: You can check the status of their work without outside connections, easy fault identification. 2.4.11 operating mode automatically switches: When the reference electrode failure due to other reasons can not work and the constant potential duration of more than 20 seconds, the instrument will automatically switch to the constant current mode. 2.4.12 Recovery: restore power after a power interruption, the instrument can operate at constant potential protective potential value of the original set. 2.4.13-off test function: The instrument can control or remote control to enter the on-off test mode. Off test mode by the local time base settings, on and off time setting range is from 0.1 to 99 seconds, set off alternately number ranging from 1 to 99 times. 2.4.14 data storage device can store the following data, and export the data stored by the USB port on the front panel. - DC output voltage; - DC output current; - protection potential; - given protection potential; - given output current (constant current mode); - operating mode (potentiostat / galvanostat / off test); - alarm and alarm type (output voltage gauge, output current limit, the protection potential gauge, temperature gauge); - operational status (on / off); - data recording time. 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 rated output current reaches 115% ~ 125%, 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. After the temperature decreases, the instrument automatically resume 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 malfunction occurs in the work, 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 output and alarm beep, After 2 minutes and switch off automatically run a backup machine. 2.5.6 reverse polarity protection: the anode and cathode polarity reversal, the instrument automatically shut down. 2.5.7 dual interlock function: A, B power switch turned on simultaneously, only allows a machine to work. 2.6 2.6.1 Operation and display interface interface equipment used push-button operation, "Constant potential," "constant current", "work", "self-test", "On / Off" and export data are shortcuts; other parameters can be set via the function keys. 2.6.2 display interface a, the LCD screen displays the following items, which show the accuracy of better than 0.5%. - DC output voltage; - DC output current; - DC protection potential; - given potential; - given current; - alarm type; - operating mode (constant potential, constant current, power test); - operational status (on / Shutdown). b, a digital table shows the input voltage. c, indicator shows: "Work," "self-test." 2.7 remote, remote control function 2.7.1 through point to point interface, you can upload the following data: the output current, output voltage, protection potential, operating status (on / off). Acceptable remote control following items: a given potential, constant potential, constant current, continuity testing, power on / off. 2.7.2 via the RS485 interface, you can upload the following data: - DC output voltage; - DC output current; - protection potential; - given protection potential; - given output current (constant current mode); - operating mode (potentiostat / constant current on / off test); - alarm and alarm type (output voltage gauge, output current limit, overrun protection potential, temperature gauge); - operational status (on / off); - data recording time. Acceptable remote control following items: a given potential, given current, constant potential, constant current, continuity testing, power on / off. 2.8 Communication Interface 2.8.1 point communication interface 2.8.1.1 Remote Control potential given interface: potential remote control interface input 4 ~ 20mA standard industrial signal, when the signal is less than 3mA, potential control setpoint value of the instrument itself, when the signal is greater than When 3.8mA, the potential value of switching control 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. 2.8.1.2 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. 2.8.1.3 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. 2.8.1.4 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. 2.8.1.5 Remote control boot, shutdown remote control interface (ie, remote control interface running status) A remote control to open the machine interface accepts 24V positive pulse signal, the instrument first off and then open A B machine machine; remote control to open the B machine interface accepts 24V When the positive pulse signal, the instrument first off A machine to open B machine; when the remote control shutdown interface accepts 24V positive pulse signal, the instrument off; pulse width is not narrower than one second, the interface isolation voltage are ≥500V. 2.8.1.6 remote control off test interface: power test interface for + 24V input level high. When the interface input high, the instrument enters test mode off, low, instruments for the usual output. Interface isolation voltage ≥500V. 2.8.1.7 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. 2.8.2 RS-485 communication interface HPS-1D MODBUS communication protocol. 2.9 Terminal Instrument wiring board is equipped with AC power input and output anode, cathode output, zero access overcast, such as the reference input terminal, the terminal installed in an epoxy glass cloth board, terminal size to meet the cable cross-sectional area of ??the requirements of that instrument output specifications. 2.10 coated chassis and chassis with a thickness greater than 1.5 mm cold-rolled steel sheet forming, surface electrostatic spray anti-corrosion treatment, protection class IP42. 2.11 Specifications Power Specifications Rated output voltage Rated output current ~ 220V ± 10% or three-phase 380V ± 10% 50Hz 30V 10A, 15A 40V 15A, 20A, 30A 50V 15A, 30A, 50A 2.12 Dimensions: height 2100mm, width of 800mm, a depth of 600mm; or height of 1600mm, width of 800mm, a depth of 600mm.