Main features:

• Resistance measurement can reach 1018Ω
• Current measurement range 10aA -20mA
• Minimum current range input voltage drop<20 μ V
• 200T Ω input impedance
• <3fA bias current
• Test speed 425 rdgs/s
• Noise 0.75fA p-p
• Built in ± 1kV voltage source
• Unique high resistance measurement voltage reverse connection method
• Optional plug-in scanning card

performance index

The half rack type 6517B electrostatic meter/high resistance meter has a special low current input amplifier, with an input bias current of<3fA, noise of only 0.75fA p-p (peak to peak), and an input voltage drop of<20 μ V. For circuit loads that are close to ideal, the input impedance for voltage and resistance measurements is 200T Ω. These performance indicators ensure the accuracy and sensitivity required for low current and high impedance voltage, resistance, and charge measurements in research fields such as physics, optics, nanotechnology, and materials science. The built-in ± 1kV voltage source has scanning capability, simplifying leakage current testing, breakdown voltage testing, and resistance testing, as well as measuring the bulk resistivity (Ω - cm) and surface resistivity (Ω/square) of insulation materials.

Wide measurement range

The 6517B electrostatic meter/high resistance meter has a fully automatic range, measuring current, resistance, voltage, and charge beyond full range:
• Current measurement range: 10aA -20mA
Voltage measurement range: 1 μ V-200V
• Resistance measurement range: 1 Ω -1018Ω
• Charge measurement range: 1fC -2 μ C

Improved high-sensitivity measurement

Many testing applications require measuring the resistivity (surface resistivity and bulk resistivity) of high-grade materials. The traditional measurement method is to apply a sufficiently high voltage to the sample, measure the current flowing through the sample, and then calculate its resistance using Ohm's law (R=V/I). Although high resistance materials and devices generate very small currents, it is difficult to accurately measure them. However, this measurement can be successfully carried out using a Jishili electrostatic meter and a picoammeter.

Even with high-precision instruments, the inherent background current in the material makes accurate measurements difficult. Due to piezoelectric, capacitive, and polarization effects, insulating materials, polymers, and plastics typically exhibit electrical currents. These currents are generally equal to or greater than the current generated by the applied voltage. In these cases, the measurement results are often unstable, generating inaccurate resistance or resistivity readings and even erroneous negative values. The Jishili 6517B electrostatic meter/high resistance meter is designed to address these issues and provide consistent, repeatable, and accurate measurements for various materials and components, especially when used with the 8009 resistance testing fixture.

Polarity transformation method

The 6517B electrostatic meter/high resistance meter uses the electrode transformation method, which effectively eliminates the background current of the sample. And remove the first and second stage drift of the background current. Apply a positive polarity voltage using the electrode transformation method, and then measure the current after a specified delay (measurement time). Next, change the voltage polarity, use the same delay, and re measure the current. Repeat this process continuously and calculate the resistance based on the weighted average of the four latest current measurement results. For most materials, this method typically generates highly reproducible and accurate resistance (or resistivity) measurements through 7 reversals (i.e. discarding the first three readings). For example, using the 8009 testing fixture with a repeatability of 0.3%, a 1mm thick 1014 Ω - cm material sample can be measured with a background current below 200fA within a 15 second testing cycle.

Simple operations similar to digital multimeters

The 6517B electrostatic meter/high resistance meter adopts a simple operation similar to a digital multimeter, which can control important functions such as resistance measurement through a single button on the front panel. It can also be controlled through the built-in IEEE-488 interface, so all functions can be programmed through the bus using a computer controller.

high resistance measurement

The many characteristics and capabilities of the 6517B electrostatic meter/high resistance meter help ensure the accuracy of high resistance measurement applications. For example, its built-in voltage source simplifies the determination of the relationship between the insulation resistivity and the voltage level of the power supply used. It is also very suitable for capacitor leakage and insulation resistance measurement, printed circuit board surface insulation resistance testing, resistor voltage coefficient testing, and diode leakage characteristic analysis.

Temperature and humidity testing

Humidity and temperature may seriously affect the resistivity value of materials. To help you accurately compare readings taken in different situations, the 6517B electrostatic meter/high resistance meter comes with a built-in K-type thermocouple and an optional 6517-RH relative humidity probe. Its built-in data storage buffer allows for recording and calling readings with time, temperature, and relative humidity stamps.

Attachment extends measurement capability

By utilizing various optional accessories, the application of the 6517B electrostatic meter/high resistance meter can be expanded and its performance can be improved.

Scan the card. Using two scanning cards can simplify the scanning of multiple signals. Each card can be inserted into the slot on the back panel of the instrument. The 6521 scanning card provides 10 low-level current scanning channels. The 6522 scanning card provides 10 high impedance voltage switch or low current switch channels.

Test fixture. The 8009 resistivity fixture is a protected testing fixture used for measuring the bulk resistivity and indicating resistivity of sample materials. It includes stainless steel electrodes constructed according to ASTM standards. The electrode size of the fixture has been pre programmed in the 6517B electrostatic meter/high resistance meter, so there is no need to calculate its value, which can be manually entered later. This attachment aims to protect users from potential hazardous voltages - automatically opening the fixture cover and closing the voltage source output of the 6517B electrostatic meter/high resistance meter.

application

The 6517B electrostatic meter/high resistance meter is highly suitable for measuring low current and high impedance voltage, resistance, and charge in research fields such as physics, optics, nanotechnology, and materials science. Its extremely low voltage drop is very suitable for measuring solar cells, and its built-in voltage source and low current sensitivity make it a solution for high resistance measurements such as polymer based nanowires. Its high speed and ease of use make it a good choice for quality control, product engineering, and production testing (including leakage, breakdown, and resistance testing) applications. The voltage reversal method using the 6517B electrostatic meter/high resistance meter can significantly improve the measurement of bulk and surface resistivity of insulation materials. The 6517B electrostatic meter/high resistance meter is also very suitable for electrochemical applications, such as ion selective electrodes and pH measurement, conductivity cells, and potential determination.

Improved 6517B Electrometer/High Resistance Meter

The 6517B electrostatic meter/high resistance meter is an upgraded model used to replace the 6517A instrument launched in 1996. The software application built using SCPI instructions for the 6517A instrument can be used for the 6517B electrostatic meter/high resistance meter without any modifications. However, compared to the early design of the 6517A, the 6517B electrostatic meter/high resistance meter has undergone some improvements. The internal battery powered memory cache can store up to 50000 readings, allowing users to record test results for longer periods of time and store more data related to readings. This new instrument also provides faster read speeds for internal cache (425 readings/second) and can be stored in external memory via IEEE bus (400 readings/second).