What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.

There are lots of good HV probe styles available. I kinda like a probe with
a built-in analog meter, just because it is simple to use, and doesn't
require a separate meter, although I have and use the types that plug into a
DMM too.

See the FAQ section about flyback/IHVT testing. One important test is an
inductor ringer, which can check for shorted turns.
There are several tests/checks to be done to analyze the quality of
flybacks. Some Sencore testers have a variable horizontal drive signal that
can be used to drive the primary of the transformer (out-of-circuit), for a
relative output test.
http://www.repairfaq.org/REPAIR/

Cheers
WB
.............

"Dani" wrote in message
oups.com...
What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.




--
Posted via a free Usenet account from http://www.teranews.com

In our shop we prefer using a stand alone instrument for measuring the
CRT high voltage.

We are now finding that investing in to anything to do with servicing
CRT equipment is becoming more limited and less feasable as time goes
on. The cost of the flat panel TV sets and monitors are dropping
every month. At the same time, manufactures are not interested in
having the burden of having parts distributions for the CRT models.

As for the LCD and plasma devices, these are mostly serviced at the
modular level. For servicing, they usualy require dedicated tools and
service information.




Wild Bill wrote:
There are lots of good HV probe styles available. I kinda like a probe with
a built-in analog meter, just because it is simple to use, and doesn't
require a separate meter, although I have and use the types that plug into a
DMM too.

See the FAQ section about flyback/IHVT testing. One important test is an
inductor ringer, which can check for shorted turns.
There are several tests/checks to be done to analyze the quality of
flybacks. Some Sencore testers have a variable horizontal drive signal that
can be used to drive the primary of the transformer (out-of-circuit), for a
relative output test.
http://www.repairfaq.org/REPAIR/

Cheers
WB
............

"Dani" wrote in message
oups.com...
What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.




--
Posted via a free Usenet account from http://www.teranews.com

Dani wrote:
What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's rated
100KV.

James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:

Dani wrote:
What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's rated
100KV.


More likely 50KV.

--
Jim Yanik
jyanik
at
kua.net

Jim Yanik wrote:
James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:


Dani wrote:

What do you guys use for HV Probes? A stand alone unit, or a DMM ad on
unit? Also, I'm looking at getting a Circuit-Test LCR meter Model #
DLM-240, or something equivilent.Ranges a Capacitance to 2000uF,
Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you guys
use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's rated
100KV.



More likely 50KV.



Just checked and it's 40KV, at any rate it goes higher than I've ever
had to measure.

James Sweet wrote in
news:nJIPh.1685$hI4.1050@trndny08:

Jim Yanik wrote:
James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:


Dani wrote:

What do you guys use for HV Probes? A stand alone unit, or a DMM ad
on unit? Also, I'm looking at getting a Circuit-Test LCR meter Model
# DLM-240, or something equivilent.Ranges a Capacitance to
2000uF, Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you
guys use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's
rated 100KV.



More likely 50KV.



Just checked and it's 40KV, at any rate it goes higher than I've ever
had to measure.


let's hope you don't encounter any CRT anodes at 40KV.....unless you're
wearing your lead undershorts! ;-)

--
Jim Yanik
jyanik
at
kua.net

Jim Yanik wrote:
James Sweet wrote in
news:nJIPh.1685$hI4.1050@trndny08:


Jim Yanik wrote:

James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:



Dani wrote:


What do you guys use for HV Probes? A stand alone unit, or a DMM ad
on unit? Also, I'm looking at getting a Circuit-Test LCR meter Model
# DLM-240, or something equivilent.Ranges a Capacitance to
2000uF, Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you
guys use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's
rated 100KV.



More likely 50KV.



Just checked and it's 40KV, at any rate it goes higher than I've ever
had to measure.



let's hope you don't encounter any CRT anodes at 40KV.....unless you're
wearing your lead undershorts! ;-)



From the look of the thing I suspect it could safely go much higher.
Not to say one should routinely abuse something, but Fluke is well known
for using conservative ratings with lots of safety margin.

James Sweet wrote in
news:QBTPh.336$yL1.332@trndny04:

Jim Yanik wrote:
James Sweet wrote in
news:nJIPh.1685$hI4.1050@trndny08:


Jim Yanik wrote:

James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:



Dani wrote:


What do you guys use for HV Probes? A stand alone unit, or a DMM ad
on unit? Also, I'm looking at getting a Circuit-Test LCR meter Model
# DLM-240, or something equivilent.Ranges a Capacitance to
2000uF, Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you
guys use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's
rated 100KV.



More likely 50KV.



Just checked and it's 40KV, at any rate it goes higher than I've ever
had to measure.



let's hope you don't encounter any CRT anodes at 40KV.....unless you're
wearing your lead undershorts! ;-)



From the look of the thing I suspect it could safely go much higher.
Not to say one should routinely abuse something, but Fluke is well known
for using conservative ratings with lots of safety margin.


I was thinking of X-ray generation at voltages above ~25KV,not the safety
of the probe.

--
Jim Yanik
jyanik
at
kua.net

Jim Yanik wrote:
James Sweet wrote in
news:QBTPh.336$yL1.332@trndny04:


Jim Yanik wrote:

James Sweet wrote in
news:nJIPh.1685$hI4.1050@trndny08:



Jim Yanik wrote:


James Sweet wrote in
news:AQyPh.2780$5x6.2567@trndny02:




Dani wrote:



What do you guys use for HV Probes? A stand alone unit, or a DMM ad
on unit? Also, I'm looking at getting a Circuit-Test LCR meter Model
# DLM-240, or something equivilent.Ranges a Capacitance to
2000uF, Inductance to 200 H, Resistance to 20M Ohm

Is this good enough to measure bad flyback windings? What do you
guys use? Thanks, Dani.



I use a Fluke HV probe that plugs into my multimeter. I think it's
rated 100KV.



More likely 50KV.



Just checked and it's 40KV, at any rate it goes higher than I've ever
had to measure.



let's hope you don't encounter any CRT anodes at 40KV.....unless you're
wearing your lead undershorts! ;-)



From the look of the thing I suspect it could safely go much higher.
Not to say one should routinely abuse something, but Fluke is well known
for using conservative ratings with lots of safety margin.



I was thinking of X-ray generation at voltages above ~25KV,not the safety
of the probe.



I've come across TVs and monitors with 35KV anodes, mostly projection or
very high resolution.

I saw on a website once they were trying to generate xrays with a CRT,
even up as high as 60KV or so there was not a measurable amount due to
the leaded glass. A few rectifier tubes though did generate enough xrays
to take a few pictures.