instrumentation

The measuring device - a device designed to produce measured values ​​
. Often measuring device called the device to generate a signal measurement information in a form accessible to direct perception of the operator or recording device (computer).

Classification By the method of presenting information
Indicating measuring instrument - a measuring device allowing only reading is reading measured values ​​
. Registering the meter - measuring instrument, which provides for the registration of indications. Register values ​​may be in analog or digital form.
Distinguish recording, printing, and storage recording devices.
By the method of measurement
The measuring device of direct action - the measuring device, e.g., a pressure gauge, ammeter in which the one or more transformations of the measured value and its value is stored without comparison with the known value of the homonymous
. Measuring comparison device - a measuring device for directly comparing the measured value with the value, the value of which is known
. According to the form of presentation of evidence
Analog Meter - measuring device, in which the output signal or indication is a continuous function of the measured value changes
. Digital measuring instrument - measuring instrument readings are presented in digital form
. On other grounds
Cumulative meter - measuring instrument readings which are functionally connected to the sum of two or more quantities supplied to it through various channels
. Integrating measuring instrument - a measuring device in which the measured values ​​are determined by its integration of other value
.
According to the method of application and designs:. Stationary, panel, panel, portable
By the principle of action taking into account the design:. With moving parts and no moving parts
For devices with mechanical part also by a method for generating counter-torque: mechanical resistance, magnetic or electromagnetic forces based
. According to the nature and scale of the situation in her Zero: uniform scale, uneven, with single-sided, double-sided (balanced and unbalanced), with beznulevoy scale
. By design reading device: direct counting, with light indicator - light spot, with a writing device, reed - vibration frequency meters, with a scale on the optoelectronic effect - phosphor, LCD, LED
. According to the measurement accuracy: normalized and nonnormable - indicators or pointers
. According to the type of energy used: physical phenomenon - electromechanical, electrothermal, electrokinetic, electro
. By the nature of the measured value: voltmeters, ammeters, webermeters, frequency, varmeters, etc.

Options For instrumentation is typical following a number of parameters:

Measurement range - measured value area, by the design of the device during its normal operation (a predetermined measurement accuracy)
. The sensitivity threshold - a minimum threshold value or the measured value, which device can distinguish
. Sensitivity - connects the measured value with the corresponding change in the readings
. Accuracy - the ability of the device to indicate the true value of the measured parameter (limit of permissible error or measurement uncertainty can also be determined by the accuracy of the device class)
. Stability - the ability of the device to maintain constant over time its metrological properties