## Maximum input voltage on the 5444B

Forum for discussing PicoScope (version 5)
cezarxr
Newbie
Posts: 0
Joined: Mon Jul 29, 2024 2:40 pm

### Maximum input voltage on the 5444B

Hi,

I have a slightly silly question, but is the +-20V input voltage measurement limitation of the 5444B directly on the inputs or does it imply using a 10:1 passive probe?

In other words, if using a 10:1 classic oscilloscope probe, is the voltage input range +-200V? Thanks!

- Cezar

Gerry
PICO STAFF
Posts: 1158
Joined: Mon Aug 11, 2014 11:14 am

### Re: Maximum input voltage on the 5444B

Hi Cezar,

The ±20V Limit on the Maximum Input Range is the upper limit, or maximum bipolar voltage, you can apply to the Channel Inputs, that will be recognized and plotted as a data value. Any voltages beyond that limit will not be plotted. A x10 Probe, or Switchable Probe set to x10, will divide a measured value of 200V at its input (Probe tip and Ground clip) down to 20V at its output (BNC connector). So, when the Probe is attached to the Channel Input, the Channel input sees the, within range, value of 20V and plots it. If you have set the Input Channel up correctly for the attached Probe (i.e. as a x10 Probe) then the value that you will see being plotted will be 200V. The Gif file below shows how you would select the probe:
Regards,

Gerry
Gerry
Technical Specialist

cezarxr
Newbie
Posts: 0
Joined: Mon Jul 29, 2024 2:40 pm

### Re: Maximum input voltage on the 5444B

Gerry wrote:
Wed Jul 31, 2024 11:07 am
Hi Cezar,

The ±20V Limit on the Maximum Input Range is the upper limit, or maximum bipolar voltage, you can apply to the Channel Inputs, that will be recognized and plotted as a data value. Any voltages beyond that limit will not be plotted. A x10 Probe, or Switchable Probe set to x10, will divide a measured value of 200V at its input (Probe tip and Ground clip) down to 20V at its output (BNC connector). So, when the Probe is attached to the Channel Input, the Channel input sees the, within range, value of 20V and plots it. If you have set the Input Channel up correctly for the attached Probe (i.e. as a x10 Probe) then the value that you will see being plotted will be 200V. The Gif file below shows how you would select the probe:

Selecting x10 probe.gif

Regards,

Gerry
Perfect, thank you!

Martyn