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ASF1430 Datasheet(PDF) 6 Page - Sensitron |
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ASF1430 Datasheet(HTML) 6 Page - Sensitron |
6 / 9 page ASF1400 Bidirectional Mass Flow Meter ver ↵ version Provides type of sensor, software, hardware and customer version get ↵ Start single measurement go ↵ Starts series of measurements s stop Stops series of measurements reset ↵ Resets ASF1400 device res=1..9 ↵ resolution Sets resolution: 1 -> 12 bits; 9 -> 15 bits, see Table 2 res? resolution Shows actual setting mod=F | T ↵ mode Selects Flow- (F) or Temperature mode (T) mod? mode Shows actual setting Disp=s,d display mode Shows Flow (s) or Flow+Temperature (d) *no effect in the Temerature mode Disp? display mode Shows actual setting defspi=P | G ↵ define spi Sets SPI in Push- (P) or Get mode (G), see also Section 4.3 Notes: • Default settings are marked in bold letters • The commands are not case sensitive. • In order to send a new command to the ASF1400 make sure the ASF1400 is not in measurement mode. Issue therefore a stop command s first. After this, any instruction can be given to the ASF1400 and a new series of measurement can be started by go ↵. • Due to the limited write cycles allowed for the EEPROM, excessive configuration modifications should be avoided. 4 Specifications ASF1400 4.1 Absolute Maximum Ratings Ambient storage temperature -65°C to 150°C Ambient operating temperature 0°C to 70°C Overpressure resistance 2.0 bar 4.2 Electrical Specifications Table 3: ASF1400 DC Characteristics. Parameter Conditions Min. Typ. Max. Units Power Supply DC DC 7 9 18 V VDD = 9 V, no load 20 mA Operating Current 27 mA VDD = 9 V, 3k Ω at RS232 output Power Dissipation VDD = 9 V, no load 180 mW Table 4: ASF1400 RS-232 Characteristics. Parameter Conditions Min. Typ. Max. Units RS232 Output Transmitter output loaded with 3k Ω ±5 ±9 V Output Voltage Swing Power-Off Output Resistance 300 Ω Output Short Circuit Current ±18 mA RS-232 Input Voltage Range -15 15 V Voltage Threshold Low 0.8 1.2 V High 1.7 2.4 V Hysteresis 0.2 0.5 1.0 V Resistance 3 5 7 k Ω www.sensirion.com Version 2.2 6/9 |
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Similar Description - ASF1430 |
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