Do you know the year these were made ? Sorry in the early 80s thank you. Because of the high impedance, you can use this on vintage tube equipment , and high frequency radios. Correct me if I'm wrong.
Hi, when you were working out the current in the circuit you forgot the internal resistance of the meter that was measuring the voltage across the resistor. I'm assuming a resistance of around 10Meg Ohm of the meter that was across the ~10Meg Ohm resistor so in parallel a total of 5Meg Ohms. Wouldn't that skew your results? What did I miss?
Cześć. Kilka uwag do opisu pod filmem. Rozdzielczość przy pomiarze prądu nie wynosi 1nA, tylko 10nA. Maksymalny mierzony prąd to 2A, nie 10A. Brak oddzielnego wejścia do pomiaru prądu. I bardzo ważna sprawa: model 175AV nie mierzy TRMS, tylko wartość średnią.
Yes, you are perfectly right. I was quoting from the Keithley 175 manual and should have used the Keithley 175AV manual. Thank you for pointing that out!😀
Do you know the year these were made ? Sorry in the early 80s thank you. Because of the high impedance, you can use this on vintage tube equipment , and high frequency radios. Correct me if I'm wrong.
They should work great on tube equipment. Just be careful to use the right ranges, or if you are not sure, start at a high range and work down.
The 175 came out in about 1983 and I think the earliest copyright on the manual for the 175AV model was 1989.
Hi, when you were working out the current in the circuit you forgot the internal resistance of the meter that was measuring the voltage across the resistor.
I'm assuming a resistance of around 10Meg Ohm of the meter that was across the ~10Meg Ohm resistor so in parallel a total of 5Meg Ohms. Wouldn't that skew your results?
What did I miss?
The HP34401A had an internal resistance greater than 10Gig ohms.
@bap8guy Ok, so it was negligible.
Got it.
Cześć. Kilka uwag do opisu pod filmem. Rozdzielczość przy pomiarze prądu nie wynosi 1nA, tylko 10nA. Maksymalny mierzony prąd to 2A, nie 10A. Brak oddzielnego wejścia do pomiaru prądu. I bardzo ważna sprawa: model 175AV nie mierzy TRMS, tylko wartość średnią.
Yes, you are perfectly right. I was quoting from the Keithley 175 manual and should have used the Keithley 175AV manual. Thank you for pointing that out!😀