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Zhongke Weineng (Beijing) Technology Co., Ltd
CHI760E Electrochemical Workstation Dual Constant Potentiometer
NegotiableUpdate on 05/07
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Overview
The CHI700E series is a universal dual potentiostat that can simultaneously control the potential of two working electrodes in the same electrolytic cell. Its typical application is the rotating ring disk electrode, and it can also be used in other situations where dual working electrodes are required. Dual potentiometers can only be used for potential control and current measurement of two working electrodes in the same solution, rather than two independent potentiometers. The instrument contains a fast digital signal generator, a direct digital signal synthesizer for high-frequency AC impedance measurement, a dual channel high-speed data acquisition system, a potential current signal filter, multi-stage signal gain, iR drop compensation circuit, a dual constant potential meter, and a constant current sensor
Product Details
CHI760E Electrochemical Workstation Dual Constant PotentiometerIt is a universal dual potentiostat that can simultaneously control the potential of two working electrodes in the same electrolytic cell. Its typical application is the rotating ring disk electrode, and it can also be used in other situations where dual working electrodes are required. Dual potentiometers can only be used for potential control and current measurement of two working electrodes in the same solution, rather than two independent potentiometers. The instrument contains a fast digital signal generator, a direct digital signal synthesizer for high-frequency AC impedance measurement, a dual channel high-speed data acquisition system, a potential current signal filter, and multi-stage signal gain,iRCompensation circuit, dual constant potential meter, and constant current meter(CHI760E)The potential range of both channels is+/-10VCurrent range(Sum of two channel currents)for±250mA.CHI700EThe series is inCHI600EOn the basis of this, an additional circuit board has been added, which contains a second channel potential control circuit and current-Voltage converter, sensitivity selection, three gain stages, and a second-order low-pass filter with eight orders of magnitude variable frequency range.CHI700ECapable of controlling the potential of two working electrodes, allowing cyclic voltammetry, linear sweep voltammetry, step wave voltammetry, chronoamperometry, differential pulse voltammetry, conventional pulse voltammetry, square wave voltammetry, and time-Measurement of dual working electrodes using experimental techniques such as current curves. When used as a dual potentiostat for measurement, the potential of the second working electrode can be maintained at an independent constant value, or it can be scanned or stepped synchronously with the first working electrode. In cyclic voltammetry, it is also possible to scan while maintaining a constant potential difference with the first working electrode. The lower limit of current measurement for both working electrodes is below50pAIt can be directly used for steady-state current measurement on microelectrodes.CHI700EThe series is also a very fast instrument. The update rate of the signal generator is10MHzData collection adopts two synchronizations16A high-resolution and low-noise analog-to-digital converter with dual channel simultaneous sampling at a maximum rate of1MHzThe scanning speed of cyclic voltammetry is1000V/sWhen the potential increment is only0.1mVWhen the scanning speed is5000V/sWhen, the potential increment is1mVFor example, the measurement frequency of AC impedance can reach1MHzThe frequency of AC voltammetry can reach10KHzThe instrument also has an external signal input channel, which can record both electrochemical signals and external input voltage signals, such as spectral signals. This is extremely convenient for experiments such as spectroscopic electrochemistry.
CHI760E Electrochemical Workstation Dual Constant PotentiometerIn addition to allowing the potential of the second working electrode to be independently controlled at a constant potential, it also allows the potential of the second working electrode to be scanned or stepped synchronously with the first working electrode. During dual channel synchronous scanning, the maximum scanning speed can reach10,000 V/sWhen using a dual channel synchronous step, the minimum sampling interval can reach1Microseconds.Due toCHI700EThe series isCHI600EThe expansion of the series,CHI700EThe series can also be equipped with a constant current meter(CHI760E).CHI700EThe series also allows for a four electrode system for liquid applications/Electrochemical measurement of liquid interface.
whenCHI700EWhen used as a single potentiostat, the performance of the series isCHI600ESame series. If andCHI200BMicrocurrent amplifier and shielding box connection, the first channel can be measured1pAOr lower current.CHI700EIt can also be combined withCHI680BThe high current amplifier is connected to obtain a larger current and slot voltage, but it can only be used for single channel measurements.
In order to meet different application needs and funding conditions,CHI700EThe series is divided into multiple models. Different models have different electrochemical measurement techniques and functions, but the basic hardware parameter indicators and software performance are the same.CHI700EandCHI710EAs a basic type,CHI720EandCHI730EFor the comprehensive electrochemical analyzer, andCHI750EandCHI760EFor a more advanced electrochemical workstation.
Hardware parameter indicators
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Potentiostat/Pine Computer-Controlled Bipotentiostat · Zero resistance ammeter · 2， three，4 electrode structure · Floating ground wire or on-site ·Maximum potential range of two channels: ± 10 V ·Maximum current: ± 250 mA continuous (sum of two channel currents), ± 350 mA peak ·Slot pressure: ± 13 V · Rise time of potentiostat: less than 1 Ms,usually 0.8 Ms · Constant potential instrument bandwidth（-3Decibel level):1 MHz ·Range of applied potentials: ± 10 mV, ± 50 mV, ± 100 mV, ± 650 mV, ± 3.276 V, ± 6.553 V, ± 10 V · Resolution of applied potential: potential range0.0015% · Accuracy of applied potential:±1 mV,±Full range0.01% · Applied potential noise:< 10mVroot-mean-square value · Measuring current range:±10 pAto±0.25 A， 12range ·Measurement current resolution: 0.0015% of the current range, 0.3 fA lower ·Accuracy of current measurement: 0.2% for current sensitivity greater than or equal to 1e-6 A/V, 1% for other ranges · loseInput bias current:< 20 pA
Constant current meter · Constant current range:3 nA – 250 mA · Current resolution applied: within the current range0.03% · Measurement potential range: ±0.025 V, ±0.1 V, ±0.25 V, ±1 V, ±2.5 V, ±10 V
Electrometer:potentiometer · Reference electrode input impedance:1e12 ohm · Reference electrode input bandwidth:10 MHz · Reference electrode input bias current:<= 10 pA @ 25°C
Waveform generation and data acquisition system · Fast signal update rate:10 MHz， 16Positional resolution · Quick Data Collection System:16Bit resolution, dual channel synchronous sampling, sampling rate per second1,000,000point · Maximum sampling rate of external signal recording channel1M Hz · Expandable scanning electrochemical microscope function Attachment ·electrode wire ·USBcommunication line ·power cord |
experimental parameters ·CVandLSVScanning speed:0.000001V/sto10,000 V/sDual channel synchronous scanning and sampling10,000 V/s · Potential increment during scanning:0.1 mVWhen the scanning speed is1,000 V/sWhen) ·CAandCCPulse width: 0.0001 to1000 sec ·CAMinimum sampling interval: 1 ms， Dual channel synchronization ·CCMinimum sampling interval: 1 ms ·CCAnalog integrator ·DPVandNPVPulse width:0.001 to10 sec ·SWVFrequency:1 Hzto100 kHz ·i-tMinimum sampling interval: 1 ms， Dual channel synchronization ·ACVFrequency range:0.1 Hzto10 kHz ·SHACVFrequency range:0.1 Hzto5 kHz ·FTACVFrequency range:0.1Hz to50HzIt can simultaneously obtain fundamental, second harmonic, third harmonic, fourth harmonic, fifth harmonic, and sixth harmonicACVdata · Communication impedance: 0.00001Hz to1 MHz · Amplitude of AC impedance waveform:0.00001 Vto0.7 Vroot mean square value
Other characteristics · Automatic or manualiRReduce compensation · Current measurement bias: full range,16Positional resolution,0.003%accuracy · Potential measurement bias:±10V，16Positional resolution,0.003%accuracy · External potential input · Analog output of potential and current · Cut off frequency of controllable potential filter:1.5 MHz, 150 KHz, 15 KHz, 1.5 KHz, 150 Hz, 15 Hz, 1.5 Hz, 0.15 Hz · Cut off frequency of controllable signal filter:1.5 MHz, 150 KHz, 15 KHz, 1.5 KHz, 150 Hz, 15 Hz, 1.5 Hz, 0.15 Hz · Rotating electrode control voltage output:0-10VFor use in0-10000 rpmThe rotational speed,16Positional resolution,0.003%Accuracy requires certain rotating electrode devices to work · Macro commands can be used to control digital input and output lines · Internal flash memory can quickly update programs · USBOral data communication · Electrolytic cell control: nitrogen supply, stirring, tapping (requires special electrolytic cell system) ·CVDigital simulators and fitters. User defined reaction mechanism（CHI730EAbove) or pre-defined reaction mechanism (other models) · AC impedance simulator and fitting device (models with AC impedance measurement function) · Maximum data length:256K-16,384Kpointoptional · Instrument size:37 cm (wide)´23 cm (deep)´12 cm (tall) |
CHI700EComparison of different models of series instruments
function |
700E |
710E |
720E |
730E |
750E |
760E |
Cyclic voltammetry（CV） |
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Linear sweep voltammetry（LSV）# |
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Step wave voltammetry（SCV）# |
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TableFigure（TAFEL） |
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Chronoamperometry method（CA） |
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Timed electricity method（CC） |
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Differential pulse voltammetry（DPV）# |
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Conventional pulse voltammetry（NPV）# |
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Differential conventional pulse voltammetry（DNPV）# |
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Square wave voltammetry（SWV）# |
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Communication (including phase sensitivity) Fu An Fa（ACV）# |
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Second harmonic alternating current (phase sensitive) voltage method（SHACV）# |
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| Fourier transform alternating current voltammetry（FTACV） | l | |||||
current-Time curve（i-t） |
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Differential pulse current detection（DPA） |
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Double differential pulse current detection（DDPA） |
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Three pulse current detection（TPA） |
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Integral pulse current detection（IPAD） |
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Control potential electrolytic Coulomb method（BE） |
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Fluid dynamics modulation voltammetry（HMV） |
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scan-Step mixing method（SSF） |
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Multi potential step method（STEP） |
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AC impedance measurement（IMP） |
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AC impedance-Time measurement（IMPT） |
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AC impedance-Potential measurement（IMPE） |
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Chronopotentiometric method（CP） |
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Current scanning chronopotentiometry method（CPCR） |
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Multi current step method（ISTEP） |
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Potentiometric dissolution analysis（PSA） |
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Electrochemical noise measurement（ECN） |
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open-circuit voltage-Time curve（OCPT） |
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Constant current meter |
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RDEControl（0-10VOutput) |
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Arbitrary reaction mechanismCVsimulator |
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Pre-set reaction mechanismCVsimulator |
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Communication impedance digital simulator and fitting program |
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Price (CNY)* |
30,100 |
30,100 |
39,200 |
48,200 |
55,300 |
62,200 |
Note:#Including corresponding polarography and stripping voltammetry. Special static mercury electrodes or hammers are required for use in polarography.
*The price does not include computers. The warranty period for the instrument is one year.
