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elektroda.net NewsGroups Forum Index - Electronics Equipment - **Kenwood PR654 Regulated DC Power Supply - cannot adjust volt**

Guest

Tue Nov 24, 2009 12:42 am

Hi,

I have bought a Kenwood PR654 Regulated DC Power Supply and am having

problems getting it to work as expected. I would have thought that I

could use it to adjust both amps and voltage simultaneously, is that a

misconception? When I plug it in I can adjust the amps but voltage is

always at a max which is much higher than the max 40v that it is rated

for. Doesn't seem to matter what buttons I change, it will always give

max... Any ideas? Is it garbage?

Thanks

Gabriel

Guest

Thu Nov 26, 2009 7:47 am

In article

<32b87651-c5ab-4e98-bd43-5f84e8ef9cce_at_f10g2000vbl.googlegroups.com>,

GabrielW <gabriel.wetterholm_at_gmail.com> wrote:

I have bought a Kenwood PR654 Regulated DC Power Supply and am having

problems getting it to work as expected. I would have thought that I

could use it to adjust both amps and voltage simultaneously, is that a

misconception? When I plug it in I can adjust the amps but voltage is

always at a max which is much higher than the max 40v that it is rated

for. Doesn't seem to matter what buttons I change, it will always give

max.

problems getting it to work as expected. I would have thought that I

could use it to adjust both amps and voltage simultaneously, is that a

misconception? When I plug it in I can adjust the amps but voltage is

always at a max which is much higher than the max 40v that it is rated

for. Doesn't seem to matter what buttons I change, it will always give

max.

Gabriel-

I'm not familiar with that model. I assume you are referring to setting

either a constant current or a constant voltage. The problem is that

both can not exist at the same time if your load varies at all.

I believe the expected use of such a power supply is operate it at a

desired voltage, with current set to an upper limit. If your load

resistance goes below a threshold, voltage will be reduced so that

current does not exceed the preset maximum.

Therefore, you would turn off the current setting mode after the desired

current limit has been set. The output should then go back to a

constant voltage unless load current exceeds the limit.

Fred

Guest

Mon Dec 07, 2009 3:23 am

On 26 Nov, 07:47, Fred McKenzie <fm...@aol.com> wrote:

In article

32b87651-c5ab-4e98-bd43-5f84e8ef9...@f10g2000vbl.googlegroups.com>,

GabrielW <gabriel.wetterh...@gmail.com> wrote:

I have bought a Kenwood PR654 Regulated DC Power Supply and am having

problems getting it to work as expected. I would have thought that I

could use it to adjust both amps and voltage simultaneously, is that a

misconception? When I plug it in I can adjust the amps but voltage is

always at a max which is much higher than the max 40v that it is rated

for. Doesn't seem to matter what buttons I change, it will always give

max.

Gabriel-

I'm not familiar with that model. I assume you are referring to setting

either a constant current or a constant voltage. The problem is that

both can not exist at the same time if your load varies at all.

I believe the expected use of such a power supply is operate it at a

desired voltage, with current set to an upper limit. If your load

resistance goes below a threshold, voltage will be reduced so that

current does not exceed the preset maximum.

Therefore, you would turn off the current setting mode after the desired

current limit has been set. The output should then go back to a

constant voltage unless load current exceeds the limit.

Fred

32b87651-c5ab-4e98-bd43-5f84e8ef9...@f10g2000vbl.googlegroups.com>,

GabrielW <gabriel.wetterh...@gmail.com> wrote:

I have bought a Kenwood PR654 Regulated DC Power Supply and am having

problems getting it to work as expected. I would have thought that I

could use it to adjust both amps and voltage simultaneously, is that a

misconception? When I plug it in I can adjust the amps but voltage is

always at a max which is much higher than the max 40v that it is rated

for. Doesn't seem to matter what buttons I change, it will always give

max.

Gabriel-

I'm not familiar with that model. I assume you are referring to setting

either a constant current or a constant voltage. The problem is that

both can not exist at the same time if your load varies at all.

I believe the expected use of such a power supply is operate it at a

desired voltage, with current set to an upper limit. If your load

resistance goes below a threshold, voltage will be reduced so that

current does not exceed the preset maximum.

Therefore, you would turn off the current setting mode after the desired

current limit has been set. The output should then go back to a

constant voltage unless load current exceeds the limit.

Fred

Thanks Fred,

It was entirely me not knowing anything about the kit that caused the

problems. On the back of it there was 10 connectors that could be

"jumpered". It was set up to control a motor of some kind and when I

removed the jumpers everything worked as expected. (for this

particular model 3 and 8 should be unjumpered for this to

happen . )

/Gabriel

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