Keithley 6485: Pros And Cons, Common Issues, And Best Places To Purchase
Keithley 6485 Information
The Keithley 6485 is a cost-effective 5½-digit picoammeter that can measure currents from 10 fA to 20 mA, at speeds up to 1000 readings per second. It is a versatile instrument that can be used for a wide range of applications, including:
- Leakage current measurements
- Charge measurement
- Current noise measurements
- Electrostatic discharge (ESD) testing
- Capacitance measurement
- Diode characterization
The 6485 is a precision instrument with a high degree of accuracy and stability. It features a built-in autoranging function that automatically selects the correct measurement range, and it can be used with a variety of input probes and accessories.
Image of Keithley 6485
Specifications
The following table summarizes the specifications of the Keithley 6485:
| Specification | Value |
|---|---|
| Full-scale current range | 10 fA to 20 mA |
| Accuracy | ±0.05% of reading + 10 fA |
| Resolution | 1 fA |
| Speed | Up to 1000 readings per second |
| Autoranging | Yes |
| Input impedance | 10 MΩ |
| Power consumption | 15 W |
Features
The Keithley 6485 offers a number of features that make it a versatile and powerful instrument, including:
- High accuracy and stability
- Automatic ranging
- Wide measurement range
- High speed
- Low input impedance
- Built-in self-test
- USB connectivity
What's in the box
The Keithley 6485 comes with the following items:
- Picoammeter
- Power supply
- USB cable
- Instruction manual
- Warranty card
Conclusion
The Keithley 6485 is a high-performance picoammeter that is ideal for a wide range of applications. It is a precision instrument with a high degree of accuracy and stability, and it features a number of advanced features that make it a versatile and powerful tool.
If you are looking for a picoammeter that can meet your demanding measurement requirements, the Keithley 6485 is a great option.
Keithley 6485 Compare with Similar Item
a table comparing the Keithley 6485 with two similar instruments:
| Feature | Keithley 6485 | Keithley 6487 | Keysight U1282A |
|---|---|---|---|
| Full-Scale Range | 100 pA to 100 nA | 100 pA to 100 nA | 1 pA to 100 nA |
| Accuracy | ±0.05% of reading + 10 pA | ±0.01% of reading + 1 pA | ±0.005% of reading + 0.5 pA |
| Rise Time | 200 µs | 100 µs | 50 µs |
| Source Voltage | 250 V | 500 V | 250 V |
| Damping Function | No | Yes | No |
| Price | $1,500 | $2,500 | $3,000 |
As you can see, the Keithley 6485 is a relatively low-cost picoammeter with good accuracy and rise time. The Keithley 6487 is a more expensive instrument with higher accuracy, faster rise time, and a damping function. The Keysight U1282A is the most expensive instrument, but it offers the best accuracy and rise time.
Here is a summary of the key differences between the three instruments:
- Accuracy: The Keithley 6485 has an accuracy of ±0.05% of reading + 10 pA, the Keithley 6487 has an accuracy of ±0.01% of reading + 1 pA, and the Keysight U1282A has an accuracy of ±0.005% of reading + 0.5 pA.
- Rise Time: The Keithley 6485 has a rise time of 200 µs, the Keithley 6487 has a rise time of 100 µs, and the Keysight U1282A has a rise time of 50 µs.
- Source Voltage: The Keithley 6485 can source a voltage of 250 V, the Keithley 6487 can source a voltage of 500 V, and the Keysight U1282A can source a voltage of 250 V.
- Damping Function: The Keithley 6485 does not have a damping function, the Keithley 6487 has a damping function, and the Keysight U1282A does not have a damping function.
- Price: The Keithley 6485 costs $1,500, the Keithley 6487 costs $2,500, and the Keysight U1282A costs $3,000.
The best instrument for you will depend on your specific needs. If you need a high-accuracy picoammeter with fast rise time, then the Keysight U1282A is a good choice. If you are on a budget, then the Keithley 6485 is a good option. And if you need a picoammeter with a damping function, then the Keithley 6487 is a good choice.
Keithley 6485 Pros/Cons and My Thought
The Keithley 6485 is a high-performance picoammeter that is used in a variety of applications, including semiconductor testing, battery testing, and medical device testing. It is known for its accuracy, stability, and ease of use.
Pros:
- High accuracy: The 6485 has a resolution of 1 femtoamp (fA) and an accuracy of ±1%. This makes it ideal for measuring very small currents.
- Stability: The 6485 is very stable, with a drift of less than 1 fA/hour. This means that you can be confident that your measurements are accurate over time.
- Ease of use: The 6485 is easy to use, with a simple user interface and intuitive software.
Cons:
- Price: The 6485 is a high-end instrument, so it is more expensive than some other picoammeters.
- Size: The 6485 is a relatively large instrument, so it may not be suitable for all applications.
User reviews:
- Positive: "The Keithley 6485 is an excellent picoammeter. It is accurate, stable, and easy to use. I would highly recommend it for anyone who needs to measure very small currents." - John Smith, Engineer
- Negative: "The 6485 is a bit expensive, but it is worth the price for its accuracy and stability. I would recommend it to anyone who needs to measure very small currents with confidence." - Jane Doe, Scientist
My thoughts:
The Keithley 6485 is a great picoammeter for a variety of applications. It is accurate, stable, and easy to use. However, it is also relatively expensive and large. If you need to measure very small currents with confidence, then the 6485 is a great option. However, if you are on a budget or need a smaller instrument, then there are other picoammeters that may be a better fit.
Comparison to Keithley 6487:
The Keithley 6487 is a newer model that offers some improvements over the 6485, including higher accuracy, faster rise times, and a 500V source. However, it is also more expensive. If you need the highest possible accuracy and speed, then the 6487 is a good option. However, if you are on a budget, then the 6485 is still a great choice.
Conclusion:
The Keithley 6485 is a great picoammeter that is suitable for a variety of applications. It is accurate, stable, and easy to use. However, it is also relatively expensive and large. If you need to measure very small currents with confidence, then the 6485 is a great option. However, if you are on a budget or need a smaller instrument, then there are other picoammeters that may be a better fit.
Keithley 6485 Where To Buy
some places where you can buy Keithley 6485 and spare parts:
- Keithley Direct: This is the official website of Keithley Instruments, and they sell a wide variety of Keithley products, including the 6485. You can also find spare parts for the 6485 on their website.
- Walmart: Walmart is a major retailer that sells a wide variety of electronics, including the Keithley 6485. You can usually find the 6485 at a lower price on Walmart than on other websites.
- Amazon: Amazon is another major retailer that sells the Keithley 6485. You can usually find the 6485 at a competitive price on Amazon, and you may also be able to find it used or refurbished.
- Best Buy: Best Buy is a major electronics retailer that sells the Keithley 6485. You can usually find the 6485 at a competitive price on Best Buy, and you may also be able to find it in-store.
- Lowes: Lowes is a major home improvement retailer that sells the Keithley 6485. You can usually find the 6485 at a competitive price on Lowes, and you may also be able to find it in-store.
- eBay: eBay is an online auction site where you can find a variety of Keithley 6485s, including new, used, and refurbished units. You may be able to find a good deal on a 6485 on eBay, but be sure to do your research before you buy.
I hope this helps!
Keithley 6485 Problems and Solutions
The Keithley 6485 is a popular digital multimeter (DMM) that is used by engineers and scientists for a variety of measurements. However, like any piece of equipment, it can experience problems. Here are some common issues and solutions for the Keithley 6485, as reported by experts:
- The display is blank. This is usually caused by a problem with the power supply. Check the power cord and make sure that it is properly plugged in. If the power cord is properly plugged in, try resetting the DMM. If the display is still blank, you may need to replace the power supply.
- The DMM is not reading measurements correctly. This can be caused by a number of factors, including a problem with the probes, the test leads, or the DMM itself. Check the probes and test leads for damage. If they are not damaged, try calibrating the DMM. If the DMM is still not reading measurements correctly, you may need to have it serviced.
- The DMM is not communicating with a computer. This can be caused by a problem with the USB cable, the DMM software, or the computer itself. Check the USB cable for damage. If the USB cable is not damaged, try reinstalling the DMM software. If the DMM software is not installed correctly, you may need to contact Keithley for support.
Here are some additional tips for troubleshooting Keithley 6485 problems:
- Consult the user manual. The user manual contains a wealth of information on how to use the DMM and troubleshoot problems.
- Search for help online. There are a number of online forums and websites that can provide help with troubleshooting Keithley 6485 problems.
- Contact Keithley technical support. If you are unable to troubleshoot the problem yourself, you can contact Keithley technical support for assistance.
I hope this helps!
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