1 Overview PS-3F multiple potentiostat impressed current cathodic protection can be applied to soil, water, fresh water, chemical medium metal structures or equipment, mainly used in fields such as regional stations impressed current cathodic protection, its technical performance indicators advanced technology, high reliability and long service life. PS-3F multi-channel potentiostat for multiple independent current output devices per channel output current can be adjusted independently without affecting each other. Each channel can achieve constant potential control, constant current control, as well as manually adjust each channel, through power test (pass n seconds, breaking m sec) modes of operation; the instrument has overcurrent protection, lightning protection, anti-hum function. 2 Standard Enterprise standard: Q / FCLD031-2009 Reference standard: GB4793.1 measurement, control and laboratory use - Safety requirements for electrical equipment for the first part of the requirements of GB4750 General Guidance for lightning protection of electronic equipment GB / T3859.1 basic semiconductor converters regulations require GB4208 enclosure protection rating GB / T2423.1 electrical and electronic products environmental testing procedures Test A: Cold Test method GB / T2423.2 electrical and electronic products environmental testing procedures Test B: high-temperature test methods GB / T2423.3 Electrical and Electronic Products Basic environmental testing procedures test C: Damp heat test method JB / T4276 AC Product packaging technology packaging Pictorial marking conditions GB191 GB / T6388 transport package shipping mark GB / T9969.1 Industrial Product Manual General Anti IEC1024 structure lightning protection three major technical indicators 3.1 Environmental conditions u Operating temperature: -15 ℃ ~ + 45 ℃; u Storage temperature: -40 ℃ ~ + 55 ℃; u Relative humidity: 20% ~ 90% RH; u Atmospheric pressure: 86KPa ~ . 106Kpa; 3.2 Power supply: AC three-phase AC380V ± 10% 50Hz ± 5%; 3.3 safety requirements u Insulation resistance: the relative power line instrument chassis insulation resistance of not less than 10MΩ. u Dielectric strength: the power line to the instrument chassis can withstand 1500V (RMS), the test voltage of 50Hz for 1min no flashover and breakdown. 3.4 Instrument rated output voltage and output current of each output voltage adjustable range not narrower than 1% of the rated output voltage; output current adjustable range not narrower than 1% to the rated output current. 3.5 Soft start: Each has a soft start function; the boot, the output current slowly diffuse increase until it reaches the pre-control value, without the impact of current phenomenon. 3.6 Ripple factor: Each instrument working at the rated output state, the load factor of not more than 10% ripple. 3.7. The operating mode instruments have to manually adjust each channel operating mode, constant potential mode of operation, the constant current mode of operation. 3.7.1 manually adjust the operating modes: manual continuously adjustable. 3.7.2 constant potential mode of operation:? Potentiostat control range: continuously adjustable in 0mV ~ -3000mV range. ? Constant potential accuracy: less than 5mV. ? Power Input features: grid voltage within ± 10% range, protection potential change in value of less than 5mV. ? Protection potential drift: the instrument is working 24h at rated state, protection potential value change is not greater than 5mV. ? Load characteristics: change when the load changes (minimum of not less than 1 / 3RdN), to protect potential value of less than 5mV, RdN rated load resistor. .? 3.7.3 constant current operating mode: You can choose to switch constant current work status; or at constant potential run-time, when the reference electrode inside the instrument automation line failure or damage other reasons can not be constant potential of the instrument, the instrument automatically switches to constant current work status. ? You can manually adjust the output of the constant current value. ? Constant current setting range: constant current mode, the control current can be continuously adjusted in the range of 1% to 100% of rated output. ? Constant accuracy of better than 2% 3.8 Reference Input impedance: Input impedance is greater than 1MΩ. 3.9 potential error alarm function: When the protection potential deviation from the control potentiometer 30mV ~ 100mV, the instrument can sound and light alarm. 3.10 When overcurrent u when the output current of 102% to 110% of rated output current value, the instrument automatically limiting the working state, concurrent sound and light alarm. u at the power input and output terminals equipped with a fuse, when there is an output overload or short circuit, cut off the power. 3.11. The power failure test function through the keyboard to select the instrument into the intermittent power supply test state, through the n seconds, breaking m sec-off time can be set. In the test period, the output current is interrupted without warning, when the off-state switch from the current impact of the phenomenon does not occur. 3.12. Each measurement function u with LCD display, which can measure the output current and the brightest, and the brightest protection potential, various control potential, each output voltage, the device can display operating status. u can monitor the AC input voltage. 3.13. The lightning protection u instrument inputs and outputs should be fitted with serrated spark gap, varistor surge absorber and Zener diode limiter three lightning discharge system, and comply with IEC1024's. u line between anode and the cathode line: limiting voltage: 100 ~ 150V; overvoltage current capacity 10KA (8 × 20μS), leakage current ≤20mA. Anode line between the zero line: limiting voltage: 100 ~ 150V; overvoltage current capacity 10KA (8 × 20μS); leakage current ≤20mA. Reference between the zero line: limiting voltage 5V; overvoltage flow capacity of 54A (10 × 1000μS); leakage current of less than 0.3μA (3V). u in the instrument output anode, cathode end (opposite the ground terminal) can withstand the magnitude of 15kV, the pulse width 25μS, repeat cycle 1 ~ 5S, simulate lightning impact time of 1min. 3.14 The reference signal u anti-jamming capability AC interference characteristics: between "reference electrode" terminal and the "zero access yin" terminal join 50Hz, 30V interference voltage change, protect potential value of not more than 5mV. u Anti-instantaneous interference: the reference input of the moment after overvoltage withstand 1000V, the instrument can still work. * Self-Test: The instrument has a self-test function, easy to determine the cause of the malfunction.