1. Nama : Adi Setiana
Nim/Kelas : 111611002/2A-D3
Teknik Refrigerasi dan Tata Udara

2.  Accuracy :
The difference between a measurement reading and the true
value of that measurement.
 Precision :
The degree to which an instrument will repeat the same
measurement over a period of time.
Precision is the ability to produce the same result from the
repeated measurement and identical measuring. accuracy
measure is the amount of random error.
 Range :
The limit of measurement values that an instrument is capable
of reading. The dimension being measured must fit inside this
range.
Subdivision

3.  Error :
The amount of deviation from a standard or
specification. Errors should be eliminated in the
measuring process.
 Hysteresis :
The delay between the action and reaction of a
measuring instrument. Hysteresis is the amount of error
that results when this action occurs.
 Stability :
The ability of a measuring instrument to retain its
calibration over a long period of time. Stability
determines an instrument's consistency over time.
 sensitivity is the smallest change in a measurement that
an instrument is capable of detect

4.  Repeatability :
The ability to obtain consistent results when measuring
the same part with the same measuring instrument.
 Resolution :
The smallest change in a measured value that the
instrument can detect. Resolution is also known as
sensitivity.
 Thermocouple :
A thermocouple consists of two conductors of different
materials (usually metal alloys) that produce a voltage in
the vicinity of the point where the two conductors are
in contact. Thermocouples are a widely used type of
temperature sensor. A thermocouple is a sensor for
measuring temperature. It consists of two dissimilar
metals, joined together at one end. When the junction
of the two metals is heated or cooled a voltage is
produced that can be correlated back to the
temperature.

5.  Subdivision is an area or part of something which is itself a part of something
larger. Subdivision in measurement system is an units smaller than other units in
the same process variable
 RTD is temperature detectorare used to measure temperature by correlsting the
resistance of the RTD elements with the temperature. RTD elements is made by
a pure material. Whose resistance at various temperature has been
documnented. Common RTD sensingelements constructed of a platinum copper
nickel has be unique and repeatableand predictable resistance VS temperatur
relationship and operating temperatur range.
 a pressure transmitter helps to accomplish two specific goals. First, pressure
instruments monitor the amount of pressure applied to a part of the process that
is required in order to achieve the desired result. a pressure transmitter may be
used to make sure that no machinery is building up pressure that is beyond
levels that are considered safe for the operators. the pressure transmitter alerts
the operator, who can take steps to shut down the machinery and thus avert an
industrial accident.
 The process of using a computer to collect data through sensors, analyze the
data and save and output the results of the collection and analysis. Data logging
also implies the control of how the computer collects and analyzes the data.
Data logging collect information faster than a human can possibly collect the
information and in cases where acc data loggers is the ability to automatically
collect data on a 24-hour basis

6.  Definition of Valve
Mechanical or electromechanical device by which
the flow of a gas, liquid, slurry, or loose dry
material can be started, stopped, diverted, and/or
regulated. The type of valve :
A. Hidraulic Valve
B. Pneumatic Valve
C. Manual Valve
D. Selenoid Valve
E. Motor Valve
 (basic valve type)
 1. Isolation valves
 2. Switching valves
 3. Control valves

7.  ADC & DAC
Analog to digital converter ( ADC ) is a devices that uses
sa,pling to convert a continuos quantity to a discrete time
representation in digitak form. ADC may also on isolated
measurement such as an electronic devices that converts
an input analog voltage or current to a digital number
proportionalto the magnitude of the voltage or current,
the digital output is binary number.
Digital Analog converter is a device that convert a digital
code to an analog signal. Digital is binary analog is voltage,
current, or electrice charge. They performs the reverse
operation. DAC is needed for signal to be recognize by
human sense or other nono digital. DAC can degrade a
signal. So conversion signal are normally choosen, so that
the errors negligible. A DAC are often used to convert
finite precisiontime series data to a continually varying
physical signal.