BZV10 diode - checking with meter?
 

Please, should the bzv10 voltage reference diode test as open circuit both
ways on a digital multimeter?

Thanks,
David

"Jamie" wrote in message
...
David Sewell wrote:
Please, should the bzv10 voltage reference diode test as open circuit
both
ways on a digital multimeter?

Thanks,
David


well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.


Thanks for that Jamie,
It's worth mentioning that some people get confused and think this is a 10
volt zener. In fact I was fooled into that trap for a short while.

David

David Sewell wrote:
Please, should the bzv10 voltage reference diode test as open circuit both
ways on a digital multimeter?

Thanks,
David


well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.

"Jamie" wrote in message
...
David Sewell wrote:
Please, should the bzv10 voltage reference diode test as open circuit
both
ways on a digital multimeter?

Thanks,
David


well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.


Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.

David

"Jamie" wrote in message
...
David Sewell wrote:

"Jamie" wrote in message
...

David Sewell wrote:

Please, should the bzv10 voltage reference diode test as open circuit

both

ways on a digital multimeter?

Thanks,
David



well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.



Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.



Hmm, seems kind of odd to me.
http://www.alldatasheet.co.kr/datash...IPS/BZV10.html

you may want to have a look at your meter.

and did you test this unit before installing it in the
circuit? is it possible you have a faulty circuit and is
taking it out?, they are only rated for 50 ma,


It's in an Hitachi tv (cp2846ta - zd950) only getting standby. Tested new
diode before fitting. Get 6.28v across bzv10. 142v on lopt.

David

David Sewell wrote:

"Jamie" wrote in message
...

David Sewell wrote:

Please, should the bzv10 voltage reference diode test as open circuit

both

ways on a digital multimeter?

Thanks,
David



well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.



Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.



Hmm, seems kind of odd to me.
http://www.alldatasheet.co.kr/datash...IPS/BZV10.html

you may want to have a look at your meter.

and did you test this unit before installing it in the
circuit? is it possible you have a faulty circuit and is
taking it out?, they are only rated for 50 ma,

"David Sewell" wrote in
:


"Jamie" wrote in message
...
David Sewell wrote:
Please, should the bzv10 voltage reference diode test as open circuit
both
ways on a digital multimeter?

Thanks,
David


well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.


Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.

David




Don't most DMMs only apply TWO volts max across any resistance?
If the zener has a diode in series with it for low temp coefficient,a DMM
is not going to measure it.It would be effectively "open circuit" in both
directions.

--
Jim Yanik
jyanik
at
kua.net

"David Sewell" bravely wrote to "All" (28 Feb 05 15:42:42)
--- on the heady topic of " BZV10 diode - checking with meter?"

DS From: "David Sewell"
DS Xref: aeinews sci.electronics.repair:42009

DS Sorry, but I have obtained a replacement bzv10 and tested it with two
DS digital multimeters. On diode range, and all ohms ranges, and they
DS definitely test as open circuit in both directions.


You need a "diode test" function on your dmm to measure forward diode
conduction. (unless of course the bzv10 has an internal forward biased
diode for temperature compensation)

I'm really surprised you are unable to test just about any diode. Why
don't you try a couple of series connected 9 volt square batteries
(plus to minus) in series with a 10K ohm resistor and a couple test
clips? This will bias the zener diode for certain. Put an LED in
series and it should light.

A*s*i*m*o*v

.... If all else fails, hurl it across the room a few times!

Jamie wrote in
:

Jim Yanik wrote:

"David Sewell" wrote in
:


"Jamie" wrote in
message ...

David Sewell wrote:

Please, should the bzv10 voltage reference diode test as open
circuit

both

ways on a digital multimeter?

Thanks,
David



well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.


Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.

David





Don't most DMMs only apply TWO volts max across any resistance?
If the zener has a diode in series with it for low temp coefficient,a
DMM is not going to measure it.It would be effectively "open circuit"
in both directions.

that maybe true with some meters how ever, the 6.2 voltage range of
the diode shouldn't really need a diode in series. it falls between
the avalanche and impact mode.
i have the 12 version of that diode here and it does test as a
diode
in the diode mode on 3 of my cheap meters.
i don't know what my meters put on it for voltage but i do know that
in
diode mode they normally increase the voltage or change the input
state of the DMM.
most DMM use low voltage so that you don't inject to much into the
circuit your working on.



Most DMMs use a low voltage because they have a full-scale reading of
200mv,and generate a current to get a FS reading for that ohms range.


--
Jim Yanik
jyanik
at
kua.net

David Sewell wrote:


Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.



Hmm, seems kind of odd to me.
http://www.alldatasheet.co.kr/datash...IPS/BZV10.html

you may want to have a look at your meter.

and did you test this unit before installing it in the
circuit? is it possible you have a faulty circuit and is
taking it out?, they are only rated for 50 ma,



It's in an Hitachi tv (cp2846ta - zd950) only getting standby. Tested new
diode before fitting. Get 6.28v across bzv10. 142v on lopt.

David

then its working ok.
your meter must have something incorrect with its operation.
getting only standby could mean a lot of things.
i don't know the chassis your working with but i have found in many
cases if you test for the logic signal on the transistor that energizes
the power relay (assuming it has one), you can work your way back to the
problem.
many times i have found the transistor it self bad or a bad solder
joint due to the heat factor.
in any case, step backwards all the way to the processor for the logic
signal.
also check for the Xray detector. many tv's use this to turn off unit
and the sensor some times goes south if you know what i mean!
that is just a starter.

Jim Yanik wrote:

"David Sewell" wrote in
:


"Jamie" wrote in message
...

David Sewell wrote:

Please, should the bzv10 voltage reference diode test as open circuit

both

ways on a digital multimeter?

Thanks,
David



well.
it's a "reference diodes" / "Zenerdiode"

6.2 volts. so in reality

there are 2 modes of operation in these types of
diodes.
impact ionization normally around 5.5 volts.
and the zener effects which take over above the
5.5 volt ranges.
the 2 modes have opposite effects in the
thermo properties.
since the bzv10 is a 6.2 v diode, it is falling
in the region where stable regulation is good
with thermo effects which makes it a very
stable Voltage Reference source.


-- to simplify your answer. yes, your diode mode
should test it as a regular diode using your
multimeter.


Sorry, but I have obtained a replacement bzv10 and tested it with two
digital multimeters. On diode range, and all ohms ranges, and they
definitely test as open circuit in both directions.

David





Don't most DMMs only apply TWO volts max across any resistance?
If the zener has a diode in series with it for low temp coefficient,a DMM
is not going to measure it.It would be effectively "open circuit" in both
directions.

that maybe true with some meters how ever, the 6.2 voltage range of the
diode shouldn't really need a diode in series. it falls between the
avalanche and impact mode.
i have the 12 version of that diode here and it does test as a diode
in the diode mode on 3 of my cheap meters.
i don't know what my meters put on it for voltage but i do know that in
diode mode they normally increase the voltage or change the input state
of the DMM.
most DMM use low voltage so that you don't inject to much into the
circuit your working on.