◆Use purpose
* APG500 resistance (Pirani) precision transmitter is designed for vacuum measurement of gas with a vacuum range of 3× 10-2 … 1.0 × 105Pa.
* This transmitter cannot be used to measure flammable or explosive gases that can react in a certain atmosphere.
* The transmitter must be used with EVP’s control and display instrument or other control and display instruments.
◆Technical information
* Measuring principle According to the physical properties of thermal conductivity of resistance (Pirani)
* Regulatory interface DN 16 ISO
* Measuring range 3× 10-2 ~ 1.0 × 105Pa (only suitable for air, nitrogen, oxygen, carbon monoxide)
* Accuracy (nitrogen) 1 × 10-1 ~ 5.0 × 103 Pa ±30% of reading
3 × 10-2 ~ 1 × 10-1Pa ±50% of reading
5 × 103 ~ 1 × 105 Pa ±50% of reading
* Repeatability 1× 10-1 ~ 5 × 103Pa 5% of reading
◆Output signal (measurement signal)
*Voltage range 0 ~ +9.5 VDC
*Output voltage +2.5 ~ +9.0 VDC
*Voltage vacuum ratio logarithm 1.0V/each level
*Error signal 0 ~ +0.5VDC VDC (filament broken)
*Output impedance 2×5. 1 Ω**
*Small impedance 10 kΩ
* Response time 100ms
*Control range 1× 10-1~ 5.0 × 103Pa
*Control output 1 open collector transistor output (DC30V/ 100mA)
*Transmitter identification 27.0 kΩ ,
*Adjustment Two small holes on the side of the transmitter are used for full scale (under ATM atmospheric strong state)
Zero point (under HV high vacuum state) adjustment
◆Power
*Transmitter input voltage +13.5 ~ +30 VDC
*Ripple ≤5% Vpp
*Current <300mA (****start current)
*Power consumption ≤2 W
*Cable connection FCC 68 / RJ45 electrical connector, 8-pin electrode
*Transmitter cable 8-core cable
*Cable length ≤100 meters (wire diameter not less than 8×0. 18 mm2
*Grounding concept Refer to “cable connection”
*The vacuum system is connected to the public signal through a 10KΩ resistor (voltage difference is less than <45V)
*Power ground and signal ground are carried out separately
*Materials exposed to vacuum: tungsten, nickel, stainless steel, nitrile rubber
*Allowable pressure 0.3 Mpa (absolute pressure), limited to inert gas
*Allowable temperature for vacuum measurement +5～+45℃
Vacuum connector 80℃
Sensing wire 120℃
Storage -5+60℃
*Relative humidity When the temperature is less than or equal to +31 °C, the relative humidity is less than 80℅ when the temperature is +40 °C, the relative humidity is reduced to 50℅
*Use only for indoor use
*Installation direction Vertical installation
*Danger
*The transmitter can only be connected to a power supply, instrument or control instrument that meets the requirements of grounded ultra-low voltage.
*The power connection of the transmitter must be equipped with a fuse.
If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.
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