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Dielectric Measurement Setup

Order Code: 55525E

Category: Physics Trainers

Introduction Beside the common and well known application of capacitors in electrical and electronic circuits, the capacitors with an exposed and porous dielectric can be used to measure humidity in air.   A huge leap in the research...



SPECIFICATION

Introduction
Beside the common and well known application of capacitors in electrical and electronic circuits, the capacitors with an exposed and porous dielectric
can be used to measure humidity in air.
 
A huge leap in the research on dielectrics (ferroelectric materials) came in 1950's, leading to the wide spread use of ceramics in capacitor applications and piezoelectric transducer devices. Since then, many other ferroelectric ceramics have been developed and utilized for a variety of applications: various type of capacitors, nonvolatile memories in computers, etc.
 
Features
LCD Display
Data - Hold Switch (HOLD)
Cx , Cx - Input Jack
Back Light Button Switch
Rotary Switch: Use this switch to select functions and ranges
Wide measuring range, covering 9 measuring sections from 0.1pf to 20,000μF that includes nominal value of any capacitance
Power: One 9V battery
 
Description of the Experiment Set-up

1. Probes Arrangement
It has two individually spring loaded probes. The probes arrangement is mounted in a suitable stand of high quality alumina which also holds the sample plate. To ensure the correct measurement of sample temperature, the thermocouple junction is embedded in the sample plate just below the sample. This stand also serves as the lid of temperature controlled oven.
 
Proper leads are provided for connection to Capacitance Meter and Temperature Controller. 
 
2. Sample
Modified lead titanate (test sample)
 
3. Oven
This is a high quality temperature controlled oven. The heating element used is a high grade Kanthal-D. It is cover. Further the top portion is also suitably covered to meet the safety standard. The oven has been designed for fast heating and cooling rates, which enhances the effectiveness of the controller.
 
4. Main Units 
The Set-up consists of two units housed in the same cabinet.
(i) Temperature Controller
It is a high quality PID controller where the temperatures can be set and controlled easily. P, I and D can be adjusted by the user and can also be kept on Auto-tuning.
 
Specification
Temperature Range : Ambient to 600° C
Power Supply : 100-240VAC; 50/60Hz
Display Method : 7 Segment LED display [Processing value (PV)
: Red, Setting value (SV): Green]
Input Sensor : Thermocouple (Chromel - Alumel)
Control Method : PID, ON/OFF Control, P, PI, PD, PIDF, PIDS
Display Accuracy : ± 0.3%
Setting Type : Setting by front push bottons
Proportional Band (P) : 0 to 100.0%
Integral Time (I) : 0 to 3600 Sec
Derivative Time (D) : 0 to 3600 Sec
Sampling Time : 0 to 120 Sec
Sampling Time : 0.5 Sec
Setting (P, I & D) : Manual / Auto

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