General > General Technical Chat

Converting a Bench Scope into a portable scope.

(1/2) > >>

chinoy:
So I got my new Hantek DSO5102P
For the past 10 years I have managed with a portable Fluke 105B Scope.
That thing was super portable. And I mad a lithum Ion bat pack for it. That allowed me to run it for days without a power source.

I have seen the videos on how to hack the Hanteck and there seems to be tons of space in there for a bat.
Anybody else thought off doing this mod ?.

I guess a good starting point would be a schematic or diagram for the Hanteck Power supply.
i.e. what voltages the unit needs to work. Then I can think about building a bat pack and if required circuit around it.

I often work on cars and at remote locations and tracks with no power so this new scope being portable would be a huge plus for me. THe other option is to use a d/c convertor i.e. you plug it into the cars lighter and it puts out 220 volts a/c.

Any help with this would be much appreciated. I could allways just open up the scope and create a schematic. But it would consume a lot of time.

I am searching on  various forums also.

chinoy:
I found this info So far.
PSU5
= 4.9 -> 5.2V (4.98V, 0.5A DSO/MSO,
+0.5A forUSB)
PSU
+9= 6.5 -> 9.0V (6.49V, 300mA, upto 450m
A during boot !!!)
PSU3.3= 3.2 -> 3.3V (3.15V, upto 1.4A (DSO) and 1.8A (MSO))
PSU-9= -6.5V -> -9.0V (-9.37V, upto 200mA)
PSU15= 14.0 -> 15.5V (15.95V, uptp 100mA)

tom66:
I found that my Rigol DS1074Z would run off approximately 50V DC on the AC connector without any issues.  I built a little boost converter box that would run from the cigarette lighter in my car, that way I could power the scope with the ignition on.

This worked absolutely fine & the scope pulled about 11W from this (so you could probably run for 4-5 hours with a suitable battery pack.) 

I can't promise it won't overstress the PSU as the PFC stage will be pulling more current but it didn't appear to show any issues running for a few hours like that.

tggzzz:
Think about what you are connecting it to.

In a normal scope, the probe's shield is connected to the protective mains earth via the scope's chassis. If the probe's shield touches a dangerous voltage, a fuse should blow.

If you remove the PME, the chassis will be at whatever voltage the probe shield is connected to, and fuses won't blow. Obviously that could harm the operator, and it can also damage the scope's power supply.

tom66:

--- Quote from: tggzzz on April 07, 2022, 01:37:04 pm ---In a normal scope, the probe's shield is connected to the protective mains earth via the scope's chassis. If the probe's shield touches a dangerous voltage, a fuse should blow.

--- End quote ---

This is only an issue if you actually intend to probe dangerous voltages. What if OP wants to measure their Arduino circuits when away from a mains power supply?  Or as they say, they work on cars a lot, so as long as they don't probe the ignition coil of an old truck, they should be OK with the lack of isolation a normal mains scope presents.

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod