APG-500 Resistance (Pirani) precision transmitter

APG-500 Resistance (Pirani) precision transmitter

Purpose of Use:

• The APG500 resistance (Pirani) precision transmitter is designed for vacuum measurement of gases within a vacuum range of 3×10^-2 to 1.0×10^5 Pa.
• It should not be used to measure flammable or explosive gases that can react in certain atmospheres.
• The transmitter must be used with EVP’s control and display instrument or other compatible control and display instruments.

Technical Information:

• Measuring Principle: Based on the physical properties of thermal conductivity of resistance (Pirani).
• Regulatory Interface: DN 16 ISO.
• Measuring Range: Suitable for air, nitrogen, oxygen, and carbon monoxide within the range of 3×10^-2 to 1.0×10^5 Pa.
• Accuracy: Varies based on the pressure range, with a maximum accuracy of ±30% of reading.
• Repeatability: 5% of reading within certain pressure ranges.

Output Signal (Measurement Signal):

• Voltage Range: 0 to +9.5 VDC.
• Output Voltage: +2.5 to +9.0 VDC.
• Voltage Vacuum Ratio Logarithm: 1.0V per level.
• Error Signal: 0 to +0.5VDC (filament broken).
• Output Impedance: 2×5.1 Ω.
• Response Time: 100ms.
• Control Range: 1×10^-1 to 5.0×10^3 Pa.
• Control Output: 1 open collector transistor output (DC30V/100mA).
• Transmitter Identification: 27.0 kΩ.

Power:

• Transmitter Input Voltage: +13.5 to +30 VDC.
• Ripple: ≤5% Vpp.
• Current: <300mA (startup current).
• Power Consumption: ≤2 W.
• Cable Connection: FCC 68 / RJ45 electrical connector, 8-pin electrode.
• Transmitter Cable: 8-core cable, length ≤100 meters.

Safety and Installation:

• The transmitter must only be connected to a power supply, instrument, or control instrument that meets the requirements of grounded ultra-low voltage.
• Power connection must be equipped with a fuse.
• Installation direction: Vertical installation.

Materials and Environment:

• Materials exposed to vacuum include tungsten, nickel, stainless steel, and nitrile rubber.
• Allowable pressure: 0.3 MPa (absolute pressure), limited to inert gas.
• Allowable temperature for vacuum measurement: +5 to +45°C; Vacuum connector: 80°C; Sensing wire: 120°C; Storage: -5 to +60°C.
• Relative humidity: <80% at temperatures up to +31°C, reduced to 50% at +40°C.
• Intended for indoor use only.

Danger:

• Ensure proper grounding and adhere to safety guidelines to prevent hazards associated with electrical connections and operation.