Re: HPIB Cables................needed
Darn it!!!! Yes, Cleveland, OH, USA, 44107 On Dec 18, 2012, at 8:16 PM, Alan Melia wrote: Hi David I presume you are in the States so it will not be worth offering
you from my stock :-((
Alan
G3NYK
(UK)
----- Original Message -----
From: "David Garrido" <d.garrido@...>
To: <hp_agilent_equipment@...>
Sent: Wednesday, December 19, 2012 12:58 AM
Subject: [hp_agilent_equipment] HPIB Cables................needed
Does anyone have some HPIB cables that need a good home? Not looking for
free, but asking here before I go to the bay. Just good ones to start
trying out the HPIB options available to me. Maybe couple of .5 meter
straight as well as right angle, couple of 1.0 meter, and a 2 meter would
be nice.
Cheers
------------------------------------
Yahoo! Groups Links
[Non-text portions of this message have been removed]
|
Re: HPIB Cables................needed
Hi David I presume you are in the States so it will not be worth offering you from my stock :-((
Alan
G3NYK
(UK)
toggle quoted message
Show quoted text
----- Original Message ----- From: "David Garrido" <d.garrido@...> To: <hp_agilent_equipment@...> Sent: Wednesday, December 19, 2012 12:58 AM Subject: [hp_agilent_equipment] HPIB Cables................needed Does anyone have some HPIB cables that need a good home? Not looking for free, but asking here before I go to the bay. Just good ones to start trying out the HPIB options available to me. Maybe couple of .5 meter straight as well as right angle, couple of 1.0 meter, and a 2 meter would be nice.
Cheers
------------------------------------
Yahoo! Groups Links
|
HPIB Cables................needed
Does anyone have some HPIB cables that need a good home? Not looking for free, but asking here before I go to the bay. Just good ones to start trying out the HPIB options available to me. Maybe couple of .5 meter straight as well as right angle, couple of 1.0 meter, and a 2 meter would be nice.
Cheers
|
Hmmmm.
Thanks.
Dave
toggle quoted message
Show quoted text
On 12/18/2012 9:54 AM, David wrote:
--- In hp_agilent_equipment@...
<mailto:hp_agilent_equipment%40yahoogroups.com>, "gleroytirebiter" wrote:
All,
There is a broken HP-6209 power supply on ebay. How easy are those to
repair?
Thanks
Dave
I've only worked on a couple of these power supplies, and it's been a
few years ago. They were fairly simple to diagnose, but fing
replacement parts was a problem, since the HP part number cross
reference that I have didn't list most of the transistors in the
units. I finally had to order the parts from Agilent (what a hassle
that was!).
One had an open filter cap on one of the supplies, and the other had a
shorted pass transistor.
Cheers,
Dave M
|
Re: OT AIE FM-110 service monitor manual?
Chris
Join and ask over on the Manuals_Exchange group on Yahoo
Dave
ArtekManuals.com
toggle quoted message
Show quoted text
On 12/18/2012 12:51 PM, Chris wrote:
In need of the above service manual for repair and calibration, unit
will not lock- unable to find information anywhere!
Regards,
Chris
Sent from my outdated iPhone wireless thingy
--
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265
|
OT AIE FM-110 service monitor manual?
In need of the above service manual for repair and calibration, unit will not lock- unable to find information anywhere!
Regards,
Chris
Sent from my outdated iPhone wireless thingy
|
Re: HP 3478A general questions
Thanks Chuck, I was looking at those a few days ago. Good to hear they are worth obtaining. I don't at all need the accuracy, but it would be nice to have. I tend to take on projects of a widely varying nature. From DC-DC supplies to ORP sensors. The resolution would be nice if nothing else.
Thanks,
Jeff
toggle quoted message
Show quoted text
On 12/18/2012 10:52 AM, Chuck Harris wrote:
Hi Jeff,
I don't know what calibration would cost, but I would think around
$140 would be enough for a 3478A... it is so easy to do.
One of the world's best bargains in a highly stable, and accurate
bench dmm is the HP3456A. It is 6-1/2 digits, and qualifies as a
transfer standard for DC. It is AC, DC and Ohms, and has a max
voltage of 1KV. Typically they can be found for $100 on the bay,
though most of mine have been given to me. Get the newer model that
has no fan, but has a visible to3 pack transistor on the back panel.
-Chuck Harris
Jeff Machesky wrote:
Thanks Chuck, sounds like the cal routine is the same as the Tek
2465BDM DMM function which technically is high enough resolution for
99.9% of my needs. I guess I'm just a bit of a stickler for that
absolute precision. I have an If I could afford an 8 1/2 digit meter I
would get one kind of mentality. Their of course is a practical side
that says don't waste a ton of money for an extra digit or two. The
3478A appears to be a good choice.
What's sending one of these off to get NIST traceable calibrated
normally run ?
If I were to buy new I was looking at the U3402A. Buying new gives me
that nice cal sheet that satisfies my need for accuracy. Whole lot of
difference in price however.
Thanks,
Jeff
On 12/18/2012 8:54 AM, Chuck Harris wrote:
The 3478A is a nice meter, but bear in mind that it is 300V max.
It is accurate, stable, and works smoothly. It is easily controlled
over HPIB.
In its deficiency corner, is the 300V max,and a non back lit LCD that
tends to get lost in the shadows.
I have never needed to calibrate mine, but I am pretty sure that you
need to complete the calibration of all steps before you leave a
particular function, say DCV, or ACV, or Ohms....
The calibration procedure takes a measurement of a known standard
on a particular range, and creates an offset that it used when it
calculates the voltage to display. The 30mv standard only calibrates
the offset for the 30mv range. The 3V standard, the 3V range...
You shouldn't have to pay more than about $100 for a working calibrated
3478A. Tucker has them for sale periodically.
9 times out of 10, a voltage measured by a scope's trace is good
enough.
Did I mention that the 3478A only measures up to 300V?
-Chuck Harris
Jeff Machesky wrote:
So it's about the time of year where I'm allowed to buy one piece of
test gear and I'm thinking I want a bench meter with higher
resolution. The best I've got so far is the Tek 2465BDM which has a
20,000 count 0.03% accuracy DMM. It's however a little out of cal and
I just don't want to spend the cash to get it back in perfect spec.
It's also a bit crazy to have a scope running just to use the DMM.
This brings me to the 3478A. While I could technically afford to buy a
new 120,000 count DMM I just can't justify the cost for the hobby type
work that I do. Plus I love working with the older gear and saving money.
Couple quick questions about the 3478A:
Can one range be calibrated at a time? This is not highly clear in the
service manual. Can I calibrate just the 3V range for example?
Are they reliable, or will I have to fix up most of what I would buy
on say ebay?
The problem I have with the meter on my Tek is that you have to
run the
entire cal for each measurement type, If you start with DC you have to
go all the way up the range from millivolts up to several hundred
volts. As we all know it's easy to get a precision calibrated low
voltage references such as a DMM check board, it's another thing
to get
500 volts or higher reference at the spec of the meter.
So is this really a meter to buy if your willing to send it off to be
calibrated or have a calibration transfer standard meter that's above
the specs of the 3478A? In other words if all you have is just a few
standards are you wasting your time?
Has anyone had any luck using a precision reference, some precision
resistors and an op-amp to generate other reference voltages with any
degree of accuracy? Also has anyone found a good source of say 500
volts 60 Hz AC? The right audio amp and a sig gen can get you some of
the other odd cal standards. High voltage DC is just so much easier to
obtain then a nice high voltage sine wave.
Sorry for the random questions, and thanks for any replies. The
54111D is still running great. My thanks again for everyone who helped
me fix the ROM's.
Jeff
------------------------------------
Yahoo! Groups Links
------------------------------------
Yahoo! Groups Links
|
David,
I know, I was just being snarky because I missed the drop-down window that's actually totally obvious!!
Erich
toggle quoted message
Show quoted text
--- In hp_agilent_equipment@..., David DiGiacomo wrote:
On Mon, Dec 17, 2012 at 6:03 PM, erich_schlecht wrote:
Dang, got caught by the Yahoo reply all bug!!!!
It's not a bug, it's the way the list owner has the list configured -
so if you don't like it, let him know.
|
Is scope in a HP 1660CS logic analyzer a good scope?
I have a HP 1660CS family logic analyzer that has the scope option, i.e. the "S" in the model number. It is spec'ed at 1 GSa/s sample rate and 250 MHz bandwidth. Pretty decient performance and adequate to my needs. I also have a LeCroy 9400 spec'ed at 125 MHz but only 40 MSa/s. The LeCroy is a nice scope to use but the low sampling rate has caused me ailising problems.
There are usability issues with the HP. The logic analyzer controls the scope through an on screen menu which is not as nice as the knobs on the LeCroy. However the high sampling rate of the HP should prevent ailising problems.
Has anyone used these logic annalyzer scopes for their main scope? I have a Tek 2465B for an analog scope so I only concerned with digital scope issues here.
Thanks,
Pete.
|
Re: HP 3478A general questions
Hi Jeff,
I don't know what calibration would cost, but I would think around
$140 would be enough for a 3478A... it is so easy to do.
One of the world's best bargains in a highly stable, and accurate
bench dmm is the HP3456A. It is 6-1/2 digits, and qualifies as a
transfer standard for DC. It is AC, DC and Ohms, and has a max
voltage of 1KV. Typically they can be found for $100 on the bay,
though most of mine have been given to me. Get the newer model that
has no fan, but has a visible to3 pack transistor on the back panel.
-Chuck Harris
Jeff Machesky wrote:
toggle quoted message
Show quoted text
Thanks Chuck, sounds like the cal routine is the same as the Tek
2465BDM DMM function which technically is high enough resolution for
99.9% of my needs. I guess I'm just a bit of a stickler for that
absolute precision. I have an If I could afford an 8 1/2 digit meter I
would get one kind of mentality. Their of course is a practical side
that says don't waste a ton of money for an extra digit or two. The
3478A appears to be a good choice.
What's sending one of these off to get NIST traceable calibrated
normally run ?
If I were to buy new I was looking at the U3402A. Buying new gives me
that nice cal sheet that satisfies my need for accuracy. Whole lot of
difference in price however.
Thanks,
Jeff
On 12/18/2012 8:54 AM, Chuck Harris wrote:
The 3478A is a nice meter, but bear in mind that it is 300V max.
It is accurate, stable, and works smoothly. It is easily controlled
over HPIB.
In its deficiency corner, is the 300V max,and a non back lit LCD that
tends to get lost in the shadows.
I have never needed to calibrate mine, but I am pretty sure that you
need to complete the calibration of all steps before you leave a
particular function, say DCV, or ACV, or Ohms....
The calibration procedure takes a measurement of a known standard
on a particular range, and creates an offset that it used when it
calculates the voltage to display. The 30mv standard only calibrates
the offset for the 30mv range. The 3V standard, the 3V range...
You shouldn't have to pay more than about $100 for a working calibrated
3478A. Tucker has them for sale periodically.
9 times out of 10, a voltage measured by a scope's trace is good enough.
Did I mention that the 3478A only measures up to 300V?
-Chuck Harris
Jeff Machesky wrote:
So it's about the time of year where I'm allowed to buy one piece of
test gear and I'm thinking I want a bench meter with higher
resolution. The best I've got so far is the Tek 2465BDM which has a
20,000 count 0.03% accuracy DMM. It's however a little out of cal and
I just don't want to spend the cash to get it back in perfect spec.
It's also a bit crazy to have a scope running just to use the DMM.
This brings me to the 3478A. While I could technically afford to buy a
new 120,000 count DMM I just can't justify the cost for the hobby type
work that I do. Plus I love working with the older gear and saving money.
Couple quick questions about the 3478A:
Can one range be calibrated at a time? This is not highly clear in the
service manual. Can I calibrate just the 3V range for example?
Are they reliable, or will I have to fix up most of what I would buy
on say ebay?
The problem I have with the meter on my Tek is that you have to run the
entire cal for each measurement type, If you start with DC you have to
go all the way up the range from millivolts up to several hundred
volts. As we all know it's easy to get a precision calibrated low
voltage references such as a DMM check board, it's another thing to get
500 volts or higher reference at the spec of the meter.
So is this really a meter to buy if your willing to send it off to be
calibrated or have a calibration transfer standard meter that's above
the specs of the 3478A? In other words if all you have is just a few
standards are you wasting your time?
Has anyone had any luck using a precision reference, some precision
resistors and an op-amp to generate other reference voltages with any
degree of accuracy? Also has anyone found a good source of say 500
volts 60 Hz AC? The right audio amp and a sig gen can get you some of
the other odd cal standards. High voltage DC is just so much easier to
obtain then a nice high voltage sine wave.
Sorry for the random questions, and thanks for any replies. The
54111D is still running great. My thanks again for everyone who helped
me fix the ROM's.
Jeff
------------------------------------
Yahoo! Groups Links
------------------------------------
Yahoo! Groups Links
|
Re: HP 3478A general questions
Thanks Brooke, that part I'm aware of. I actually made up a spreadsheet that I can plug in rated accuracies and quickly see how many digits I can trust a meter to have absolute accuracy at a given value. It's shown me that you really have to get a meter with incredible accuracy to get in to those lower digits. Sometimes however it's just nice to see the delta of the value vs the absolute value.
A project on my plate at the moment is a 5.5 amp 0-18 volt linear supply. It drifted from 5.000 volts to 5.001 volts over night. It would have been nice to see a few extra digits to see how it was relating to temperature changes in a more real time fashion.
Thanks,
Jeff
toggle quoted message
Show quoted text
On 12/18/2012 10:23 AM, Brooke Clarke wrote:
Hi:
Be careful to read the specs for the ranges you are interested in.
AFAICR the display is showing a digit or two more than the accuracy.
Have Fun,
Brooke Clarke
hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com> wrote:
HP 3478A general questions
|
Re: HP 3478A general questions
Hi:
Be careful to read the specs for the ranges you are interested in.
AFAICR the display is showing a digit or two more than the accuracy.
Have Fun,
Brooke Clarke
hp_agilent_equipment@... wrote:
toggle quoted message
Show quoted text
HP 3478A general questions
|
--- In hp_agilent_equipment@..., "gleroytirebiter" wrote:
All,
There is a broken HP-6209 power supply on ebay. How easy are those to repair?
Thanks
Dave
I've only worked on a couple of these power supplies, and it's been a few years ago. They were fairly simple to diagnose, but fing replacement parts was a problem, since the HP part number cross reference that I have didn't list most of the transistors in the units. I finally had to order the parts from Agilent (what a hassle that was!).
One had an open filter cap on one of the supplies, and the other had a shorted pass transistor.
Cheers,
Dave M
|
Get in the OEM Paper Manual Business
Ladies & Gentlemen
I have been asked to help liquidate two lots of ( predominately) HP Manuals
The first lot is approximately 2000 Manuals of which about ~1500 are HP and the rest a mixture of other manufacturers
The second lot is 3000+ Manuals with a few ( maybe a 100) of other manufacturers.
This is being handled on a "sealed" email bid basis and all bids need to be received by Midnight USA/CDT Jan 5th.
Both Lots are located in the upper midwest USA ( one near Minneapolis and one near Chicago).
Please contact me OFF LIST via direct email to manuals@.... for more detailed information.
Replies to the list WILL NOT BE ANSWERED
Thank you for the bandwidth
Happy Holidays
Dave
ArtekManuals.com
--
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265
|
?
There is the drawing in the service manual, straight forward, Just hope it's not the transformer.
From: gleroytirebiter <kc0wjn@...>
To: hp_agilent_equipment@...
Sent: Tuesday, December 18, 2012 10:02 AM
Subject: [hp_agilent_equipment] HP-6209 Power Supply
All,
There is a broken HP-6209 power supply on ebay. How easy are those to repair?
Thanks
Dave
------------------------------------
Yahoo! Groups Links
|
Re: HP 3478A general questions
Thanks Chuck, sounds like the cal routine is the same as the Tek 2465BDM DMM function which technically is high enough resolution for 99.9% of my needs. I guess I'm just a bit of a stickler for that absolute precision. I have an If I could afford an 8 1/2 digit meter I would get one kind of mentality. Their of course is a practical side that says don't waste a ton of money for an extra digit or two. The 3478A appears to be a good choice.
What's sending one of these off to get NIST traceable calibrated normally run ?
If I were to buy new I was looking at the U3402A. Buying new gives me that nice cal sheet that satisfies my need for accuracy. Whole lot of difference in price however.
Thanks,
Jeff
toggle quoted message
Show quoted text
On 12/18/2012 8:54 AM, Chuck Harris wrote:
The 3478A is a nice meter, but bear in mind that it is 300V max.
It is accurate, stable, and works smoothly. It is easily controlled
over HPIB.
In its deficiency corner, is the 300V max,and a non back lit LCD that
tends to get lost in the shadows.
I have never needed to calibrate mine, but I am pretty sure that you
need to complete the calibration of all steps before you leave a
particular function, say DCV, or ACV, or Ohms....
The calibration procedure takes a measurement of a known standard
on a particular range, and creates an offset that it used when it
calculates the voltage to display. The 30mv standard only calibrates
the offset for the 30mv range. The 3V standard, the 3V range...
You shouldn't have to pay more than about $100 for a working calibrated
3478A. Tucker has them for sale periodically.
9 times out of 10, a voltage measured by a scope's trace is good enough.
Did I mention that the 3478A only measures up to 300V?
-Chuck Harris
Jeff Machesky wrote:
So it's about the time of year where I'm allowed to buy one piece of
test gear and I'm thinking I want a bench meter with higher
resolution. The best I've got so far is the Tek 2465BDM which has a
20,000 count 0.03% accuracy DMM. It's however a little out of cal and
I just don't want to spend the cash to get it back in perfect spec.
It's also a bit crazy to have a scope running just to use the DMM.
This brings me to the 3478A. While I could technically afford to buy a
new 120,000 count DMM I just can't justify the cost for the hobby type
work that I do. Plus I love working with the older gear and saving money.
Couple quick questions about the 3478A:
Can one range be calibrated at a time? This is not highly clear in the
service manual. Can I calibrate just the 3V range for example?
Are they reliable, or will I have to fix up most of what I would buy
on say ebay?
The problem I have with the meter on my Tek is that you have to run the
entire cal for each measurement type, If you start with DC you have to
go all the way up the range from millivolts up to several hundred
volts. As we all know it's easy to get a precision calibrated low
voltage references such as a DMM check board, it's another thing to get
500 volts or higher reference at the spec of the meter.
So is this really a meter to buy if your willing to send it off to be
calibrated or have a calibration transfer standard meter that's above
the specs of the 3478A? In other words if all you have is just a few
standards are you wasting your time?
Has anyone had any luck using a precision reference, some precision
resistors and an op-amp to generate other reference voltages with any
degree of accuracy? Also has anyone found a good source of say 500
volts 60 Hz AC? The right audio amp and a sig gen can get you some of
the other odd cal standards. High voltage DC is just so much easier to
obtain then a nice high voltage sine wave.
Sorry for the random questions, and thanks for any replies. The
54111D is still running great. My thanks again for everyone who helped
me fix the ROM's.
Jeff
------------------------------------
Yahoo! Groups Links
|
Re: HP 3478A general questions
The 3478A is a nice meter, but bear in mind that it is 300V max.
It is accurate, stable, and works smoothly. It is easily controlled
over HPIB.
In its deficiency corner, is the 300V max,and a non back lit LCD that
tends to get lost in the shadows.
I have never needed to calibrate mine, but I am pretty sure that you
need to complete the calibration of all steps before you leave a
particular function, say DCV, or ACV, or Ohms....
The calibration procedure takes a measurement of a known standard
on a particular range, and creates an offset that it used when it
calculates the voltage to display. The 30mv standard only calibrates
the offset for the 30mv range. The 3V standard, the 3V range...
You shouldn't have to pay more than about $100 for a working calibrated
3478A. Tucker has them for sale periodically.
9 times out of 10, a voltage measured by a scope's trace is good enough.
Did I mention that the 3478A only measures up to 300V?
-Chuck Harris
Jeff Machesky wrote:
toggle quoted message
Show quoted text
So it's about the time of year where I'm allowed to buy one piece of
test gear and I'm thinking I want a bench meter with higher
resolution. The best I've got so far is the Tek 2465BDM which has a
20,000 count 0.03% accuracy DMM. It's however a little out of cal and
I just don't want to spend the cash to get it back in perfect spec.
It's also a bit crazy to have a scope running just to use the DMM.
This brings me to the 3478A. While I could technically afford to buy a
new 120,000 count DMM I just can't justify the cost for the hobby type
work that I do. Plus I love working with the older gear and saving money.
Couple quick questions about the 3478A:
Can one range be calibrated at a time? This is not highly clear in the
service manual. Can I calibrate just the 3V range for example?
Are they reliable, or will I have to fix up most of what I would buy
on say ebay?
The problem I have with the meter on my Tek is that you have to run the
entire cal for each measurement type, If you start with DC you have to
go all the way up the range from millivolts up to several hundred
volts. As we all know it's easy to get a precision calibrated low
voltage references such as a DMM check board, it's another thing to get
500 volts or higher reference at the spec of the meter.
So is this really a meter to buy if your willing to send it off to be
calibrated or have a calibration transfer standard meter that's above
the specs of the 3478A? In other words if all you have is just a few
standards are you wasting your time?
Has anyone had any luck using a precision reference, some precision
resistors and an op-amp to generate other reference voltages with any
degree of accuracy? Also has anyone found a good source of say 500
volts 60 Hz AC? The right audio amp and a sig gen can get you some of
the other odd cal standards. High voltage DC is just so much easier to
obtain then a nice high voltage sine wave.
Sorry for the random questions, and thanks for any replies. The
54111D is still running great. My thanks again for everyone who helped
me fix the ROM's.
Jeff
------------------------------------
Yahoo! Groups Links
|
Re: HP 3478A general questions
Joe:?
?
What are your thoughts on the HP 745A for AC calibrations.? It has a 1K and a 10K range.
?
I have two of them, ...one working, one needs the optical thermistor in the clipper circuit.
?
Thanks, ...-Don
?
?
?
===============================
?
?
?
?
?
?
?
From: J. L. Joe:Trantham <jltran@...>
To: hp_agilent_equipment@...
Sent: Tuesday, December 18, 2012 9:30 AM
Subject: RE: [hp_agilent_equipment] HP 3478A general questions
?
Jeff,
I have a 3478A and I have calibrated it by hand but it has been a while. I
*think* it is possible to just calibrate one range at a time but I'd have to
look at the manual. When I did the calibration, I was trying to 'harvest'
the CAL data and lost it so I had to do a complete calibration.
For my day to day bench work, I use a Fluke 8050A. They are usually
available very cheap and are quite reliable. I have never calibrated one
though, even though the process is described in the manual.
If you get the 3478A, I would send it out for calibration and make it your
'house transfer standard'. IIRC, though, it's maximum range is 300 Volts so
might not be a great meter for 'general purpose' trouble shooting but good
around most old HP equipment.
For most AC work, the usual frequency used for calibration is 1 KHz, not 60
Hz. You might want to take a look at a Fluke 5100B. Very interesting piece
of cal gear. Volts, current, AC and DC, and resistance. Big and heavy
though.
Good luck and Merry Christmas.
Joe
-----Original Message-----
From: mailto:hp_agilent_equipment%40yahoogroups.com
[mailto:mailto:hp_agilent_equipment%40yahoogroups.com] On Behalf Of Jeff Machesky
Sent: Tuesday, December 18, 2012 8:25 AM
To: mailto:hp_agilent_equipment%40yahoogroups.com
Subject: [hp_agilent_equipment] HP 3478A general questions
So it's about the time of year where I'm allowed to buy one piece of
test gear and I'm thinking I want a bench meter with higher
resolution. The best I've got so far is the Tek 2465BDM which has a
20,000 count 0.03% accuracy DMM. It's however a little out of cal and
I just don't want to spend the cash to get it back in perfect spec.
It's also a bit crazy to have a scope running just to use the DMM.
This brings me to the 3478A. While I could technically afford to buy a
new 120,000 count DMM I just can't justify the cost for the hobby type
work that I do. Plus I love working with the older gear and saving money.
Couple quick questions about the 3478A:
Can one range be calibrated at a time? This is not highly clear in the
service manual. Can I calibrate just the 3V range for example?
Are they reliable, or will I have to fix up most of what I would buy
on say ebay?
The problem I have with the meter on my Tek is that you have to run the
entire cal for each measurement type, If you start with DC you have to
go all the way up the range from millivolts up to several hundred
volts. As we all know it's easy to get a precision calibrated low
voltage references such as a DMM check board, it's another thing to get
500 volts or higher reference at the spec of the meter.
So is this really a meter to buy if your willing to send it off to be
calibrated or have a calibration transfer standard meter that's above
the specs of the 3478A? In other words if all you have is just a few
standards are you wasting your time?
Has anyone had any luck using a precision reference, some precision
resistors and an op-amp to generate other reference voltages with any
degree of accuracy? Also has anyone found a good source of say 500
volts 60 Hz AC? The right audio amp and a sig gen can get you some of
the other odd cal standards. High voltage DC is just so much easier to
obtain then a nice high voltage sine wave.
Sorry for the random questions, and thanks for any replies. The
54111D is still running great. My thanks again for everyone who helped
me fix the ROM's.
Jeff
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
|
On Mon, Dec 17, 2012 at 6:03 PM, erich_schlecht <schlechtca@...> wrote: Dang, got caught by the Yahoo reply all bug!!!! It's not a bug, it's the way the list owner has the list configured - so if you don't like it, let him know.
|
Re: HP 3478A general questions
My experience is that an HP 3478A won't need to be calibrated unless
the battery dies.
As has been mentioned many times, the weak spots are the LCD display
and the 300V input limit.
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