0.3 Economy class PID regulatorDetailed product description：

The small DCS control system composed of SR73A and SR74A economical instruments with communication interfaces and XF-2000 Chinese window configuration software can achieve PID adjustment of the circuit, real-time monitoring of the production process, and output various analysis reports, truly realizing the automation of the production process and the intelligence of quality management!

Display: dual four digit seven segment digital display; 7 status lights; Measurement accuracy of 0.3% ± 1 word of full range; Sampling period is 0.5 seconds.
Free input: 11 types of thermocouples can be selected; 8 types of platinum resistors; 6 voltage inputs and 4-20mA current inputs.
Adjustment algorithm: A non overshoot expert PID algorithm designed for the heat treatment industry. The anti overshoot suppression coefficient can be set.
Adjust output: SSR solid-state relay output; 4-20mA and 0-10V linear output; Contact output.
Input filtering time constant: used to reduce measurement value jumping caused by disturbances in the industrial field and stabilize measurement value display.
Measurement value compensation: Correction values can be set for measurement errors of instruments and sensors or errors caused by excessively long sensor wires.
Alarm output: Two independent alarm relays; Heater disconnection alarm; Users can set eight types of alarms for absolute/deviation.
Set value offset: Two set values inside the machine can be selected through the external SB terminal of the instrument, suitable for day/night temperature difference and insulation control.
DC linear input programmable digital display range: can set engineering quantity display units from -1999 to 9999, with decimal point position.
Manual adjustment of output: The automatic/manual switching within the proportional band can be completed without disturbance through the manual keys on the panel.
Adjust output limit: The upper and lower limits of the output amplitude can be set separately, the size and opening of the valve can be limited, and the heating power can be limited.
Power on slow start protection: The power on output increases at a slope of 1-100 seconds to reduce load impact and protect power components.
Adjustment execution and offline: The panel allows for easy selection of automatic adjustment of the instrument or measurement display without output.
Proportional cycle setting: P and Y-shaped output instruments can have output proportional cycles set to match heating devices and adjust resolution.

The most distinctive communication function (optional):

A wider address range: Instrument addresses range from 0 to 99, allowing up to 100 instruments to be connected to the same network.
Baud rate: 1200240048009600 can be set; Binary block check and parity check.
A concise ASC code communication protocol: special guide symbols are used to distinguish other communication devices (such as PLCs) on the network

SR73A/74A Regulator Selection Table

project	code	Double four digit digital display, measurement accuracy of ± 0.3% of full range+1 word, sampling twice per second, self-tuning PID parameters. Equipped with manual, power on slow start, adjustable output limit, and no overshoot expert PID
1. Type	SR73A-	DIN standard height 96 x width 96 x depth 110mm opening size: 92 x 92mm
	SR74A-	Standard 96 × 48 × 110mm 92 × 45mm
2. Input type and measurement range. The display range and decimal point position of DC input type can be set		eight free input	Thermocouples: 11 types, 22 measurement ranges (Hua Shi omitted): B: 0～1800 R: 0～1700S: 0～1700 K1: -100～400 K2: 0～1200 E: 0～700 J: 0～600T: -199.9～200.0 N: 0～1300 U: -199.9～200.0 L: 0～600 ℃. Platinum resistance: Pt100 or JPt100 standard, with 16 measurement ranges (Hua Shi omitted): -200~600, -100.0~100.0, -50.0~50.0, 0.0~200.0 ℃. Millivolt voltage: 0-10, 10-50, 0-100; The display range can be set from -1999 to 9999.
		four	Current: 4-20mA accepts impedance of 250 Ω; The display range can be set from -1999 to 9999.
		six	Voltage (V): 0-1,1-5,0-10; The display range can be set from -1999 to 9999.
3. Adjust the output type (adjustment methods: PID, PD, PI, P, and positional)			P	Solid state relay SSR driving voltage output: proportional period 1-120 seconds can be set; Level: 15V ± 3VDC/20mA (at 1.5K load)
			Y	Relay contact: proportional cycle 1-120 seconds can be set; 240VAC: 2.5A/pure resistance 1A/inductive load.
			I	Linear current output: 4-20mA DC, output impedance below 600 Ω.
			V	Linear voltage output: 0-10V DC, load current below 2mA.
4. Alarm and option types The independent upper and lower limit alarm relay output is the basic configuration, and four alarm modes can be set. Single phase heater disconnection alarm (optional) Note: Only applicable to Y1 or P1 output type instruments SB set value offset (optional)				one	Independent upper and lower limit alarm relay contact capacity: 240VAC 1.5A (pure resistance).
				three	Upper and lower limit alarm+wire breakage alarm (detection from 0.0 to 50.0A)
				five	Upper and lower limit alarm+SB set value offset (dual set value)
				A	Upper and lower limit alarm+special disconnection alarm (0-5VDC input)
5. Isolation digital communication interface option type, communication distance up to 1.2 kilometers, can link up to 100 instruments					0	No interface
					five	RS - 485
					six	RS - 422A

SR73A/74A economical 0.3-level PID regulator