Bradley Oscilloscope Calibrator Type 192 Manual Dexterity
The right arm will be lighter but lack the dexterity of the left. Figure the right one is more like a backhoe in range of motion. I recently purchased a Philips PM 3260 oscilloscope for a really low price but unfortunately the second channel doesn't even display a trace. After trouble shooting and opening it up it became really obvious that. New South Wales; Manual helium escape valve watch; Speakercraft vital 1250 manual lawn; 2wire home portal 1000hw manual dexterity; Vizio 32 hdtv manual; Alarma contra incendios ma.
Assuming you have access to that equipment the process would be fairly straight-forward wouldn't it? The art of ancient egypt robbins pdf to jpg. I know different oscilloscopes have different ways to start the calibration procedure. But the way to do it after that should be mostly universal, right?
I've just never actually seen it done. What do most people do if they don't do it for themselves? Bring it to a local college lab and pay $50 for someone there to do it for them? I know there are places you can mail them off too but that's an awful lot for shipping.
(lets assume we are talking about calibration and adjustment) The process is not straight-forward. Except maybe for the most primitive oscilloscopes the process also was never universal. And with the rise of more and more electronics, including microprocessors, the processes have again become much different over the last few decades. The manufacturers define the procedures, define the equipment you need and if they are nice they make that information available, instead of keeping it in house. Today, the most modern calibration processes are fully automatic, if you can afford the equipment, with no need to open the lid of the instrument.
On the other end of the scale there is still equipment out there where you have to solder or desolder components or where you have to go back and forth between several manual adjustments to find an equilibrium between desired values. Kiri is right. You need a good reference, and thats all to it, as you said, it will be straight forward from there, assuming the device has the feature to re-calibrate (software or hardware). And i dont see there is 'general' or 'universal' way of calibration, only the definition of 'what calibration is'. Each device with their own specific calibration method. If you are talking built in or tuning the internal circuit method of calibration, without any reference as mentioned earlier.
I was misunderstanding the word 'calibration' and 'compensation', now i know more about what calibration is. 'from agilent app note, cant remember which one, impedance measurement iirc'. Again'BoredAtWork' hits the nail on the head!! The calibration procedure is,with older analog units,usually included in the Workshop Manual.
It is usually in software with the newer DSOs, etc. It can be fiddly,I remember one Tek Oscilloscope where you needed to short a connection to earth on a big ganged wafer switch to do one adjustment. I got it one wafer out! It blew up one of those nasty stacked regulator setups that Tek & HP love so much. About the best most of us with home labs or in small businesses can do is verify performance as best we can,but calibration needs fairly serious instrumentation & a fair amount of time.
The easiest thing is find the service or calibration manual and follow the procedures. Oscilloscopes have different methods for calibration. The Rigol 1052e, has self calibration function, just select it.
However, the internal references may need to be checked against calibrated references at some point, but given these scopes are not as accurate as DMMs or counters, its far less critical. You can spot check amplitude with a DMM, and a frequency counter for the horizontal accuracy. For a DMM the metrologic way is to compare the DUT with a calibrated reference source specified by the service manual. The traditional item is usually a calibrator or stand alone individual traceable references. However, if you have access to a calibrated DMM that is at least 10x more accurate than what you are calibrating, and have a stable source, not necessarily metrological quality [be it voltage, frequency, current, resistance], say for minutes to hours, to make a transfer from the calibrated meter to the DUT, you can make adjustments, comparing the DUT to the calibrated meter.
Its tedious but its DIY and you shouldn't use this for professional applications because the methods are not standard and may lack traceability. I first saw Agilent mention this common practice in research labs in the 1252a manual, acknowledging this can be a good substitute: This DIY method depends on whether the DMM will accept as its input, the signal you are using. A variable power supply, DMM and function generator should be enough to verify the attenuation, time base and horizontal/vertical geometry. The only thing you can't verify/adjust is frequency response / transient response, which either needs a leveled sine wave oscillator or a pulse generator with fast, clean edges. In some cases it's only a performance verification anyway, it's either OK or it's not and it needs repair. Much of the dedicated equipment is about doing the calibration faster and easier, which is a big deal for commercial calibration. If you want to follow the manufacturer's procedure, you're likely to need $1k+ worth of equipment if you buy used, and much more if you pay list price.