FujiElectric ZAF Thermal Conductivity Gas Analyzer

FujiElectric ZAF Thermal Conductivity Gas Analyzer

FujiElectric ZAF type

    peculiarity

   Large, easy-to-see LCD display.

   Can communicate with a computer.

   Compact panel mounting structure.

   Automatic correction function for zero and full-scale points (optional).

   Compensating for the interference effects of other gases (optional).

   Gas concentration alarm output (optional)

   You can select one of the upper · lower limit alarm, upper · upper limit alarm, and lower · lower limit alarm output.

   Range switching (optional)

   Switching mode operated by front keypad or input via external contact. Measuring range ratio: 1:10 for H2 and He, 1:5 for Ar, CH4 and CO2.

   Linearization of the measurement output signal (optional)

   use

   H2 gas concentration measurement in semiconductor devices

   H2 gas concentration measurement in a hydrogen generator

   H2 gas concentration measurement in a sintering furnace

   Measurement of Ar, He, and CH4 concentrations in gas generators

   Measurement of He gas concentration in a superconducting device

   Measurement of Ar gas concentration in air separation plants

   Measuring principle

   Thermal conductivity gas analyzers measure gas concentrations using the different thermal conductivity of two component gases. Inside the detector there is a reference chamber and a measuring chamber, and the inside is tensioned with fine platinum wires. The reference chamber is sealed with a reference (reference) gas. The platinum wire is combined with an external fixed-value resistor to form a bridge loop, and a constant current flows through each platinum wire to make it heat. If there is a change in the concentration of the measured component, the thermal conductivity of the sample gas will change accordingly, which will change the temperature of the platinum wire in the measuring chamber. By taking this temperature change in the form of a change in resistance value, the concentration of the measured gas can be calculated.

   Main specifications:

Standard Specifications	Measurement method	Thermally conductive
	Measure the components	He、Ar、H2、CH4、CO2
	Measuring range	H2：0～3……100％，100～90，100～80％ He：0～5……100％，100～90，100～80％ Ar：0～10……100％，100～90，100～80％ CH4：0～20……100％，100～80％
	Output signal	DC4~20mA, DC0~1V, DC0~10mV non-isolated output (one point, depending on the model)
	Allowable load resistance	Up to 550Ω (when DC4~20mA output)
	Output resistance	100kΩ (at DC0~1V, DC0~10mV)
	display	With backlit LCD
	Measured values are displayed	Up to 4 digits or 2 decimal places
	The output signal is maintained	The output value before correction is maintained during manual correction and automatic correction
	Power supply voltage, power consumption	AC100~240V 50/60Hz, approx. 50VA
	Ambient temperature, humidity	-5~45°C, no more than 90%RH (no condensation)
	Installation method:	Panel recessed
	Dimensions(H×W×D)	240×192×213mm
	weight	Approximately 5kg
	Enclosure type	Sheet steel shell, indoor type
	Gas inlet and outlet, ventilation port	Rc1/4 or NPT1/4 (as specified)
	The flow rate of the ventilation gas	Approx. 1 L/min (as required)
	Applicable Standards	CE marking (scheduled to obtain certification)
performance	repeatability	±1%FS
	drift	Zero point: within ±2% FS/week (H2 analyzer) Full Scale Point: Within ±2% FS/week (H2 Analyzer)
	Responsiveness (90% response)	Standard: Within 60 seconds (0.4L/min flow) High speed: less than 10 seconds (1L/min flow) However, only for H2 analyzer (reference gas is N2)
Standard measurement of gas conditions	temperature	0～50℃
	Gas flow	0.4±0.05 L/min and should be stable
	dust	Particles not exceeding 1 m, not exceeding 100 g/Nm3
	pressure	No more than 10kPa
	Aerosols, corrosive gases	not
	moisture content	Do not saturate at more than 2 °C
Optional Accessory Specifications	linearization	Additional linearization of the output signal (DC4~20mA) of the measured value Straightness does not exceed ±2%FS
	Relay contact output	5 points of 1a output Relay contact capacity: AC220V/2A (resistive load) Relays are isolated from each contact and from the internal circuit You can select up to 5 of the following functions The automatic correction uses a zero solenoid valve to drive the output The output is driven by a full-scale solenoid valve for automatic correction The suction pump is OFF output during automatic calibration Upper limit (1 point) concentration alarm output Lower limit (1 point) concentration alarm output Upper and lower limit (1 point) concentration alarm output Upper (1 point) and lower (1 point) concentration alarm output Upper limit 2 segments (1 point each) concentration alarm output The lower limit is 2 segments (1 point each) concentration alarm output Analyzer abnormality or automatic correction abnormal alarm output Output in correction Measuring range information output
	Contact input	3 non-voltage contact inputs ON: 0 V, OFF: 5 mA at DC5 V, ON It is isolated from the internal circuit by optocoupler, and the contact input is not isolated You can enter the following three points Remote measured value output hold Remote range switching (dual-range analyzer only) Remote auto-correction begins
	Input of interferometric gas measurements	H2 Analyzer Analog Input for Interferometry (DC1~5V) Input a component of CO2 or CH4 from an external gas analyzer. It needs to be adjusted at our factory. Confirm the details of the gas to be measured at the time of ordering.
	Auto-correction function	Zero-point and full-scale corrections are performed automatically according to pre-set cycles. The solenoid valve is actuated externally, and the correction gas flows sequentially.
	Communication features	RC232C (9-pin D-sub output) Half-duplex bit continuous asynchronous periodic formula MODBUS protocol, communication speed 9600bps Communication contents: Measurement concentration value, reading and writing of various set values, instrument status output

We always adhere to the business philosophy: "to provide a full range of high-quality services, supply high-quality products, mutual benefit and win-win, integrity to others." This is also the belief that all the staff of our company adhere to.

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FujiElectric ZAF Thermal Conductivity Gas Analyzer

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