G
g.knott
Guest
Does anyone know how to calibrate this? Made in the UK.
J
Jamie
Guest
g.knott wrote:
then you complain about the Americans. ( that is if you
are a Brit to start with). and after all of that.
if you still have interest in calibrating that meter.
You could then start looking at the manual.
personally, I don't thing the meter should nerd
calibrating. If so, and you're looking for very high
accuracy? I don't think you should be doing it.
Over here in good old USA. a Simpson 260 Analog
meter is considered a standard. Or at least, it once
was. ( I have one btw, in very good condition)
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
then you complain about the price of petrol.
then you complain about the Americans. ( that is if you
are a Brit to start with). and after all of that.
if you still have interest in calibrating that meter.
You could then start looking at the manual.
personally, I don't thing the meter should nerd
calibrating. If so, and you're looking for very high
accuracy? I don't think you should be doing it.
Over here in good old USA. a Simpson 260 Analog
meter is considered a standard. Or at least, it once
was. ( I have one btw, in very good condition)
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
G
g.knott
Guest
Jamie wrote:
The point is that I have a class of students that must calibrate a piece
of electronic equipment according to the manufacturer's instructions.
We have lots of these meters and since they are battery driven they are
safe to dismantle.
I was hoping someone has done this.
The point is that I have a class of students that must calibrate a piece
of electronic equipment according to the manufacturer's instructions.
We have lots of these meters and since they are battery driven they are
safe to dismantle.
I was hoping someone has done this.
R
Robert Baer
Guest
g.knott wrote:
get those instructions.
And since you are referring to a mass production unit, any
calibrating (pot tweaking) done at the factory is done according to
*internal* methods and thus is !proprietaty! and will not be disclosed.
So, the best you can do in this case is "calibrate a piece of
electronic equipment according to best (to be determined) efforts".
Take one apart and tweak only one pot at a time, say by only one
screwdriver blade-width, and check all scales to find what changed.
This way, each adjustment can be labelled "capacitance zero",
"resistance", "voltage", "unknown".
*RESET* the tweak when done.
Use a digital camera for a closeup and label the photo (use arrows to
pots) accordingly; print copies along with a suggested procedure that
you determine.
You can use 0.1% resistors and 2% capacitors as "standards", along
with an off-the shelf precision voltage regulator.
Current measurements are never adjustable; they depend on the
internal shunt accuracy and voltage measurement accuracy.
equipment according to the manufacturer's instructions" thenyou need to
get those instructions.
And since you are referring to a mass production unit, any
calibrating (pot tweaking) done at the factory is done according to
*internal* methods and thus is !proprietaty! and will not be disclosed.
So, the best you can do in this case is "calibrate a piece of
electronic equipment according to best (to be determined) efforts".
Take one apart and tweak only one pot at a time, say by only one
screwdriver blade-width, and check all scales to find what changed.
This way, each adjustment can be labelled "capacitance zero",
"resistance", "voltage", "unknown".
*RESET* the tweak when done.
Use a digital camera for a closeup and label the photo (use arrows to
pots) accordingly; print copies along with a suggested procedure that
you determine.
You can use 0.1% resistors and 2% capacitors as "standards", along
with an off-the shelf precision voltage regulator.
Current measurements are never adjustable; they depend on the
internal shunt accuracy and voltage measurement accuracy.
J
Jamie
Guest
g.knott wrote:
but that was the calibrator. Now days, I really don't think they do that
any more.
Sorry I couldn't of been any more help to you.
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
cell was to output something like 1.56xxx , I can't remember exactly.
but that was the calibrator. Now days, I really don't think they do that
any more.
Sorry I couldn't of been any more help to you.
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
G
g.knott
Guest
Jamie wrote:
g.knott wrote:
Jamie wrote:
g.knott wrote:
Does anyone know how to calibrate this? Made in the UK.
First you sit down and eat your tea and crumpets.
then you complain about the price of petrol.
then you complain about the Americans. ( that is if you
are a Brit to start with). and after all of that.
if you still have interest in calibrating that meter.
You could then start looking at the manual.
personally, I don't thing the meter should nerd
calibrating. If so, and you're looking for very high
accuracy? I don't think you should be doing it.
Over here in good old USA. a Simpson 260 Analog
meter is considered a standard. Or at least, it once
was. ( I have one btw, in very good condition)
Ah another helpful American ;-)
The point is that I have a class of students that must calibrate a
piece of electronic equipment according to the manufacturer's
instructions.
We have lots of these meters and since they are battery driven they
are safe to dismantle.
I was hoping someone has done this.
Ok, well, I do remember (years ago no when I was a kid), a fresh carbon
cell was to output something like 1.56xxx , I can't remember exactly.
but that was the calibrator. Now days, I really don't think they do that
any more.
Sorry I couldn't of been any more help to you.
Thanks.
R
Robert Baer
Guest
Jamie wrote:
calibrated, and if not, new ones wer good to 5 digits (if i remember
correctly - been ages).
Mercury cells were good enough to use as a secondary standard wheng.knott wrote:
Jamie wrote:
g.knott wrote:
Does anyone know how to calibrate this? Made in the UK.
First you sit down and eat your tea and crumpets.
then you complain about the price of petrol.
then you complain about the Americans. ( that is if you
are a Brit to start with). and after all of that.
if you still have interest in calibrating that meter.
You could then start looking at the manual.
personally, I don't thing the meter should nerd
calibrating. If so, and you're looking for very high
accuracy? I don't think you should be doing it.
Over here in good old USA. a Simpson 260 Analog
meter is considered a standard. Or at least, it once
was. ( I have one btw, in very good condition)
Ah another helpful American ;-)
The point is that I have a class of students that must calibrate a
piece of electronic equipment according to the manufacturer's
instructions.
We have lots of these meters and since they are battery driven they
are safe to dismantle.
I was hoping someone has done this.
Ok, well, I do remember (years ago no when I was a kid), a fresh carbon
cell was to output something like 1.56xxx , I can't remember exactly.
but that was the calibrator. Now days, I really don't think they do that
any more.
Sorry I couldn't of been any more help to you.
No, no, no!
calibrated, and if not, new ones wer good to 5 digits (if i remember
correctly - been ages).