today i will give you the complete information about types of graphic recorders working of this recorders and the advantages disadvantages of this graphic recorders

what is the recorders?

recorders is a measuring instrument of a instrumentation system which records or display the time varying quantity and signals for the analyse, inspecting, monitoring and the maintenance of the system.

In the vast industries there are many machines works continuously and there are some parameters like temperature, flow, voltage, pressure, current, power, etc. this parameters is hazardous at the some times to avoid the accidents it is necessary to monitor and record of different conditions.

needs of the recorders

at some times for the research or investigate of the various parameters for the further operations or some new experiments we have to need the previous readings or data at that time the recorders are useful

this recorded data concludes or gives information of the device that where we have find the trouble in he system.

it helps to remove such faults

the recorded data of faults is used further for corrections, upgredation and modifications in the system

used for overall performance of plant

types of graphic recorders

strip chart recorder
X-Y recorder
circular chart recorder

1. strip chart recorder

strip chart recorder is the oldest method of recording the data in which the data is recorded on a chart paper which records the variation with respect to time therefore this method is also known as the graphic recorder.

In this diagram it shows that the basic block diagram of strip chart recorder device it consists of many aspects like

chart paper that records the recordings on the paper like the ECG
variation variables
stylus it must have the type according to the measuring mechanism :

1.ink filled stylus 2.heated stylus 3.chopper bars 4.electronic stylus 5.optical marking system

range selector which is used for the range of the variables
paper drive system
speed selector which normally controls the speed of paper or the drive
pendrive system for the information to be recorder
signal conditioners
servo motor

in the device any quantity to be record is firstly considered as the input signals this input signals further provided to the range selector this range selector select proper or useful range for the servomotor. to make the signal strong and clear or make it conditioning it transmits to the signal conditioner and the processed signals from the signal conditioner given to the servo motor by this input signals the servomotor rotates this rotational motion of servomotor is connected to the strip by the mechanical shaft and the strip is connected to the pen or the stylus

at the other hand the chart is provided here with the drive or pendrive and by the stylus or the marker the movement of strip is recorded on chart

advantages of strip chart recorders

this method is less costly compared to the others
this method convenient to record time varying quantity
this is very easy to use and install
when the chart is moving to take readings we can change or maintain the speed of rotation
no limitation of the paper and the stylus in the system
large amount of sheets can be inserted at one time for getting the multiple readings
In this system more than one variable can be recorded

disadvantages of strip sheet recorder

it is not suitable for the proportional readings
mechanism of the system is complicated
given readings is not accurate
not easy to find the older data get by the system
it is less sensitive to record very small signals

2. x-y recorder

x-y recorder is the newly modified device of graphics recorded it records the relation between the two variables on the graph like the one physical quantity represents x-axis on the graph and the second one represents the y-axis on the graph

In this recorder system we record the variables this is the newly modified device of the strip chat recorder the sheet used in this device is specially designed

on the chart first quantity shows horizontally and another quantity is arranged vertically

as shown in the figure the two blocks are set on the positions shown in the fig.

because of two quantity the strip in the x-y recorder and the chart bot moves that cause we get the relation between the two variables

there are two servomotors are connected one servomotor is connected to the strip and another is connected to the chart at the starting the input signal is given to the attenuator this attenuator tunes the input signals this tuned signals is send to the balance circuit which is controlled by the reference of external source then there is a channel provided between the balanced circuit and the amplifier for channelized the signals at any specific range further to amplify this signals it transmitted to the amplifier after this the process of servomotor gets i/p to rotate.

the rotation causes the relative motion between the strip and chart that motion gives the radiation between the two rotational quantity this strip and chart recorder are connected to the x-y terminals this strip and chart moves as their conveniency vertically and horizontally this movement causes the drawn recordings by the marker or pen provided at the strip.

like the strip sheet recorder this is also a oldest method of the recorders.

applications of x-y recorders

in industrial works to get the relation between the two variables
to draw recordings of stress and strain, rest, temperature, characteristic.
to records the characteristic of motor like speed, torque, current etc.
to plot the regulation curves of power supply against time
records the electrical characteristic like resistance.

advantages of x-y recorder

we obtain recorded data in the graphical manner
we can plot two variables
electrical and non-electrical all type of quantities can recorded

disadvantages of x-y recorder

power consumption is high as compare to strip sheet recorder because here we use two servomotor
construction of this recorder is complicated
cost of recorder is high

3. circular chart recorder

circular chart recorder is a graphical recorder in which the data is recorded in a flat circular sheet is mounted as shown in the fig. it consist of a measuring element and the operating mechanism, for recording the data there is a chart drive , recording pen for stability of the chart and for proper data recording the chart is mounting at the plane plate that is the chart plate

the chart is positionate by the springs clips as shown in the fig. measuring element is a helical pressure tube or any other element the motion is transformed from measuring element to the recording pen by the links A,B,C, that originated at the operating system of the device for the fitting and locked of the sheet there is the pen arm and the sheet must be driven at the uniform rate at the time indicator for recording the data drive assembly consists of center chart it is supported by spindle iron drive motor the chart and the chart mechanism is locked in the center spindle

for the the sheets various drive is used : 1.mechanical spin lock drive 2. numatic spin lock drive 3 .externally control lock drive 4.motor spring

again the circular chart recorders have two types

1.single pen circular chart recorder

2.dual pen circular chart recorder

applications of circular chart recorder

circular chart recording instrument is used in many ways for multiple field like cleaning, industries, material industries some of this applications is as follows: