Measuring Instruments

Measuring Instruments:

Analog ph Meter Circuit : Analog ph Meter Circuit – pH is defined as the negative logarithm of the active hydrogen ion. It is a measure of the acidity or alkalinity of an aqueous solution. The pH …


Automatic Bridge : The bridges discussed so far require that the controls be adjusted for balance after each capacitor (or other devices being tested) is connected to the bridge. In effect, they are manual. In recent years …


Field Strength Meter : The Field Strength Meter is used to measure the radiation intensity from a transmitting antenna at a given location. With its own small antenna, it is essentially a simple receiver with an indicator. The …


LCR Bridge : Basic LCR Bridge (Skeleton Type):A simple bridge for the measurement of resistance, capacitance and inductance may be constructed with four resistance decades in one arm, and binding post terminals to which external resistors or …


Megger : Another common method of measuring resistances above 50 M Ω is the Megger (megaohmmeter) shown in Fig. 10.23(a). This instrument is used to measure very high resistances, such as those found in cable insulations, between …


Output Power Meters : The Output Power Meters is designed to directly measure the output power in an arbitrary load. The instrument provides a set of resistive loads to be selected for power measurements. In addition to …


Phase Sensitive Detector Circuit : Figure 10.4 shows a Phase Sensitive Detector Circuit (or phase meter) for comparing an ac, signal with a reference signal. The Phase Sensitive Detector Circuit produces a rectified output, which is fed to …


Q Meter : The overall efficiency of coils and capacitors intended for RF applications is best evaluated using the Q value. The Q Meter is used to measure some electrical properties of coils and capacitors. The Q …


RX Meter : An RX meter is used to measure the separate resistive and reactive components of a parallel Z network. It is especially useful in the design of RF tank circuits but can be used with …


Stroboscope Definition : Stroboscope Definition – The stroboscopic principle uses a high intensity light which flashes at precise intervals. This light may be directed upon a rotating or vibrating object. The stroboscopic effect is apparent when the …


Transistor Tester : The term Transistor Tester (or analyser) used in this text is for instruments giving quantative measurements of transistor parameters. The tester should be able to provide direct readings for atleast two important measurements, such …


Vector Impedance Meter (Direct Reading): If some knowledge of the reactive and resistive factors is needed, in addition to obtaining a direct reading of the magnitude of the impedance (Z), a test method for determining the Vector …


Updated: May 1, 2020 — 12:54 pm