Resolution of Electronic Display

you need to learn some english your sentence doesnt make sense

and why should i search for datasheet? your the one asking for help.

send me a copy of data sheet or a link.

Have the link for datasheet

http://www.farnell.com/datasheets/315681.pdf

Both you and the manual are using technical English incorrectly. Where the manual says "4 ¹/₂ places", it should say "4 ¹/₂ digits". Where it says "11,999 digits", it should say something like "Maximum value of display=11,999".

"4 ¹/₂ digits" normally means that 4 of the digits can display any value from 0 to 9, while the 5th digit has a restricted set of values that can be displayed. I suspect that the first digit of this meter can only be a zero or a one. On some meters, the rightmost digit can only be a 0 or a 5.

This display can show a variation of one part in 12,000, which is an order of magnitude more precision than most common hand-held meters. The fact that it can display such precision may or may NOT mean the instrument is accurate to that precision.

Do you know that, what is the construction difference between the two plates of the DC Capacitor. Please read the question in the link carefully. I cannot find a solution from google.

http://cr4.globalspec.com/thread/59491#newcomments

I meant that in DC capacitor each plates are specified as -ve and +ve. There should be some difference for material that is used for each plate construction. Otherwise (If both plates are of same material) no need to specify -ve and +ve plates, we can connect it anyway. For AC capacitor this construction difference will not takes place, because current is altering in both direction.

I need to know what is the difference (difference in material used to construct) between both plates of a DC Capacitor.

I think you got my point........

Why cant you just accept that the electrolytic capacitor is polarity conscious and normal capacitors are not ?

as for the meter if it works and you know how to use it, accept it.

the extra knowledge wont affect your ability to earn money will it ?

so why bother trying to work out the small things.

You will be asking next what is Gravity?

what is Magnetism

what is the purpose of life.

For everything that is happening around us, there will be a reason. We should be anxious about these reasons.

When we study about one thing thousands of questions that starting with ''Why'' will arise in our mind. By finding all the answers of that questions we are getting deep knowledge in that subject. Otherwise, study will not be worth. I don't like to byheart data as it is given.

We may have huge knowledge, but sometimes we are missing some simple ''Why'' like this.

I am searching the answers for that questions that arising in my mind.

That is why i am asking which electrode have oxide coating.

Fair enough the answer by the way "which electrode has coating" is contained in one of the replies i posted, Have you not read them?

Because if your not reading them i am wasiting my time researching them

below taken from

http://en.wikipedia.org/wiki/Electrolytic_capacitor

Construction

Aluminum electrolytic capacitors are constructed from two conducting aluminum foils, one of which is coated with an insulating oxide layer, and a paper spacer soaked in electrolyte. The foil insulated by the oxide layer is the anode while the liquid electrolyte and the second foil acts as the cathode. This stack is then rolled up, fitted with pin connectors and placed in a cylindrical aluminum casing. The two most popular geometries are axial leads coming from the center of each circular face of the cylinder, or two radial leads or lugs on one of the circular faces. Both of these are shown in the picture.

Polarity

In aluminum electrolytic capacitors, the layer of insulating aluminum oxide on the surface of the aluminum plate acts as the dielectric, and it is the thinness of this layer that allows for a relatively high capacitance in a small volume. The aluminum oxide layer can withstand an electric field strength of the order of 10⁹ volts per meter. The combination of high capacitance and high voltage result in high energy density.

Most electrolytic capacitors are polarized and require one of the electrodes to be positive relative to the other; they may catastrophically fail if voltage is reversed. This is because a reverse-bias voltage above 1 to 1.5 V^[1][2][3] will destroy the center layer of dielectric material via electrochemical reduction (see redox reactions). Following the loss of the dielectric material, the capacitor will short circuit, and with sufficient short circuit current, the electrolyte will rapidly heat up and either leak or cause the capacitor to burst. This is because, if the aluminium foil with a layer of aluminium oxide on it is made negative the oxide ion will get reduced and will convert into oxygen gas generating a high pressure and hence may burst open the capacitor.^{[citation needed]} This is same as the electrochemical principle in an electrolyte with 2 electrodes.

To minimize the likelihood of a polarized electrolytic being incorrectly inserted into a circuit, polarity is very clearly indicated on the case. Also, the negative terminal lead of a radial electrolytic is shorter than the positive lead and may be otherwise distinguishable. On a printed circuit board it is customary to indicate the correct orientation by using a square through-hole pad for the positive lead and a round pad for the negative.

Special capacitors designed for AC operation are available, usually referred to as "non-polarized" or "NP" types. In these, full-thickness oxide layers are formed on both the aluminum foil strips prior to assembly. On the alternate halves of the AC cycles, one or the other of the foil strips acts as a blocking diode, preventing reverse current from damaging the electrolyte of the other one. Essentially, a 10 microfarad AC capacitor behaves like two 20 microfarad DC capacitors in inverse series.

Modern capacitors have a safety valve, typically either a scored section of the can, or a specially designed end seal to vent the hot gas/liquid, but ruptures can still be dramatic. An electrolytic can withstand a reverse bias for a short period, but will conduct significant current and not act as a very good capacitor. Most will survive with no reverse DC bias or with only AC voltage, but circuits should be designed so that there is not a constant reverse bias for any significant amount of time.

the other links i posted that you havent botherd to look at.

• Electrolytic capacitor - Wikipedia, the free encyclopedia - 04:26 1 History; 2 Construction; 3 Polarity; 4 Electrolyte .... Most electrolytic capacitors are polarized and require one of the electrodes to be positive .... of electric charge stored per unit of potential difference between the plates. ...
  en.wikipedia.org/wiki/Electrolytic_capacitor
• Capacitor - Wikipedia, the free encyclopedia When there is a potential difference (voltage) across the conductors a static electric ... charge on each conductor to the potential difference between them. ... A more compact construction began to be used of a flexible dielectric sheet ..... Electrolytic capacitors offer very high capacitance but suffer from poor ...
  en.wikipedia.org/wiki/Capacitor
• Electrolytic capacitors That is, it is a good insulator only in one direction, and in the other it conducts electricity. ... Normally carried out at the rated top temperature to the capacitor, ... Figure 2: Construction of a wound aluminium electrolytic capacitor .... differences between tantalum and aluminium electrolytic capacitors. ...
  www.ami.ac.uk/courses/topics/0136_ec/index.html
• Capacitor types and their uses: Radio-Electronics.Com Electronic capacitors are one of the most widely used electronic components. ... The differences between the different types of capacitor can mean that the circuit ... In essence the construction of an electronic capacitor is very simple, ... In some capacitors the plates may be flat, and normally these capacitors ...
  www.radio-electronics.com ›
• FaradNet Book "Electrolytic Capacitors" Chapter 1 3 Apr 2000 ... Construction of Matter: Molecules: Atoms: Electrons: Electrical Capacitors ... The difference between solids, liquids and gases is in the degree of ... impelled in one direction, out of its normal position in its cell, ...
  www.faradnet.com/deeley/chapt_01.htm
• Electrochemistry Encyclopedia -- Electrolytic capacitors A relationship between the charge flow through the system and the amount of product (in this ... Construction details of a wet aluminum electrolytic capacitor ..... These capacitors usually have a series resistance near one milliohm, ... In a normal discharge capacitor application, the capacitor is charged slowly, ...
  electrochem.cwru.edu/encycl/art-c04-electr-cap.htm
• Electrolytic capacitor: Definition from Answers.com The voltage applied to them must be polarized; one specified terminal must always have positive ... 1 History; 2 Construction; 3 Polarity; 4 Electrolyte ..... What is the difference between electrolytic capacitors and normal capacitors? ...
  www.answers.com/topic/electrolytic-capacitor-1
• Capacitors Electrolytic capacitors are polarised and they must be connected the ... Note that there are no gaps between the colour bands, so 2 identical bands actually appear as a wide band. ... Their value (in pF) is normally printed without units. ... 1030 and so on because for these values 10 is a very small difference, ...
  www.kpsec.freeuk.com/components/capac.htm
• Reforming Electrolytic Capacitors One of the early attemped applications of the electroltyic capacitor was in conjunction ... The essential difference between the electrolytic and nonelectroltyic .... It is essential, however, to select for its construction a material ...
  www.vcomp.co.uk/tech_tips/reform_caps/reform_caps.htm
• [PDF] Aluminum Electrolytic Capacitors - General Technical Information File Format: PDF/Adobe Acrobat
  The difference between forming voltage and operating voltage, the so-called ... An Al electrolytic capacitor constructed in the way described above will only operate correctly if ..... rating of the Al electrolytic capacitor under normal operating .... If a capacitor in one of the series branches fails and causes a ...
  www.epcos.com/.../Capacitors/AluminumElectrolytic/.../PDF__GeneralTechnicalInformation,property=Data__en.pdf;/... this will be my last posting on this matter and any other matters you ask about as you dont read the information i post.

Thank you very much..

If you don't mind please give answer for the question containing in the following link.

http://cr4.globalspec.com/thread/59488#newcomments

It is better to reply via the correct forum.

No sorry i will not answer, as your not reading my answers and links, if you cant be bothered neither can i

Good bye

Dear Peter,

Please understand that now in this forum there is about 35 comments now. I feel regret that I canot find that post from the all. That is why I asked you please reply via the correct forum. Be friendly.....

Accidentaly I found this website and I understood that this is the place to ask my all boubts also it is very interesting. Look in my all forums some persons teased me regarding the standard of my questions. But they couldn't provoke me. Many of them who is working in electrical area do not know some basic facts like this.

I tried in google by typing ''difference between negative and positive plate'', but I didn't get the answer. But you simply found the answer (also in case of display specification). That is the rhythm of searching......

Anyway let me continue to discuss with you, because you have good knowledge and have good helping mentality also. You are ''Guru'' and just understand that I am a 23 years old guy and now started my career............