Usage:
PID regulators are ment to be used for:

- solid, set value regulation;

- regulation of remote controlled set value ;

- relation regulation.

The regulators are compact realizations in three case types.
Output is achieved as three-positioning regulator in variations with:

- relay output,

- semi-conducting zero crossing,

- open-colector output,

- digital output.

Regulators have an abbility of displaying the two magnitudes:

1.	display 3 and 1/2 digits, displaying "X" magnitude:
	a)	displaying realistic value in physical units or in percentage amount,
	b)	displaying difference of the measured and set value in realistic value or in percentage amount,
	c)	same as a and b, plus a possibility of measuring two magnitudes (such as x and x1 or x and y) by choosing one of them via switch.
2.	bargraph-display with luminating diodes; displaying "Y and W" magnitude 0 - 100%.

The regulator's algorythms P-I-D are adjustible from the front site of the regulator. Derivated part is bound on "X" input magnitude or regulation aberration.

Regulators exist in two variations of action: normal or reverse:

- under normal action we mean that regulator for negative regulation aberration ("X" is smaller than the set magnitude) have a positive output activity as a result, output current is growing and the valve is opening,

- under reverse activity we mean that regulator for negative regulation aberration, execute negative action, output current is falling and the valve is closing.