Technical Parameters:
1 Thermocouple part:
1.1 Vacuum measurement range: 101KPa—0.1Pa
Measurement error: 267-1 <± 20
1.2 Heating current adjustment range: 30mA ± 2.4mA Set by digital adjustment accuracy: <± 0.5% ± 2 words
1.3 Matching regulation: ZJ-54D thermocouple regulation
2 Ionization part:
2.1 Vacuum measurement range: 1-6.7X10-6Pa
Measurement error: ± 20%
2.2 Ionization gauge emission current: 5mA ± 3% (10-1-10-6 Pa) 100μA ± 3% (1-0.1Pa)
2.3 Gate voltage: 225V ± 1%
2.4 Automatic degassing start vacuum degree: 10-3Pa
2.5 Automatic degassing time: 10 minutes
2.6 Applicable regulations: ZJ-2, ZJ-27
3 Control contacts:
3.1 Number of control contacts: 3
3.2 Control contact capacity: AC 220V / 1A
4 Operating environment:
4.1 Ambient temperature: + 5-35 degrees
4.2 Relative humidity: <85% (25 degrees)
SWT2ZFH series composite vacuum measuring instrument is a new generation of intelligent composite vacuum measuring instrument. A single-chip microcomputer is used for data processing, and vacuum readings are displayed digitally. The measurement results are intuitive and clear, and the readings are convenient.
â—† The degassing of the ionization gauge can be performed automatically or manually.
â—† Using the latest data memory circuit, the thermocouple part can directly set the vacuum value corresponding to the thermocouple potential during calibration and place it into the internal memory unit of the instrument through the button on the panel. The instrument can perform vacuum measurement according to the calibration curve formed by a limited number of calibration points. The ionization part can put the calibration coefficient of the ionization gauge into the internal memory unit of the instrument. The reading can be corrected during measurement, and the measurement accuracy is high.
â—† The D / A circuit with feedback link is used to control the size of the thermocouple heating current. The thermocouple heating current can be set digitally. It is simple, convenient, intuitive and accurate.
â—† The range is switched automatically. When the vacuum level drops and exceeds the measurement range of the ionization gauge, the instrument can automatically stop the ionization part and display the measurement data of the thermocouple part. When the vacuum level increases, the ionization part can be automatically started. â—† The newly developed panel-embedded printer can print the vacuum degree-time curve or vacuum degree-time data. Two printing methods can be selected by the user. When printing data, the time interval can be selected by the user. When printing the curve, the vacuum degree adopts logarithmic coordinates. The vacuum system's vacuum degree changes with time at a glance.
â—† Vacuum unit can be converted automatically.
â—† A variety of measurement display modes, flexible and diverse display methods.
â—† With three relay contacts, the action vacuum can be set digitally.
â—† When the vacuum degree is higher than 0.01Pa, the heating current of the thermocouple gauge can be automatically calibrated.
â—† The instrument is equipped with RS-485 / 232 serial data communication interface, which is convenient for communication with the host computer.
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