The Model 175 Series are low range differential pressure transducers and transmitters. Each unit features a push-activated ZERO function and an associated LED lamp indicator. With a convenient push button, the zero calibration can be performed without any additional equipment. It significantly reduces time and cost for users. The unique bi-color LED indicates if the transducer is at normal operation, over pressure, or in the process of zero calibration. It also reports if the unit is badly damaged. The Model 175 Series are available for full scale pressure range from 0 to 0.1"WC till 0 to 100"WC. Both unidirectional and bidirectional pressure ranges are offered. The output of the Model 175 Pressure Transducer is available in two versions: 0 to 5VDC and 0 to 10VDC, where 0VDC is true zero without offset. The output of Model 175 Pressure Transmitter is 4 to 20 mA. All units are temperature compensated. The accuracy can be 0.6%, 0.4% or 0.25% at room temperature. The patented variable capacitance pressure sensor is constructed by stainless steel and glass, no glue or other organics. That provides excellent performance, corrosion resistance and long-term stability. Standard Optional 35 to 170° F(2 to 77°C) 15PSI(100kPa) 15PSI(100kPa) in Positive or Negative Direction for all Ranges ±0.5% FS/YR ±0.1%FS Position Effect Each unit is calibrated in the vertical position. For best accuracy, adjust zero of the unit if it is mounted in other position. It is not necessary to adjust the sensitivity. * RSS of Non-Linearity, Hysteresis, and Non-Repeatability. alpha" instruments Performance Data Accuracy* (at room temp) Non-Linearity (BFSL) Hysteresis Non-Repeatability Thermal Effects: Zero/Span Shift (/°F) Compensated Range Maximum Line Pressure Overpressure Stability Warm-up shift Applications: ■ HVAC and VAV Control ■ Clean Rooms and Isolation Rooms ■ Duct Static Pressure Measurement ■ Draft Control and Fume Hood Control ■ Furnace Air Flow Control ■ Power Plant Air Flow Monitor and Control Features • Green/Red Bi-Color LED to Indicate The Working Status • Push Button Zero Calibration • 15 PSI Over Pressure • Detachable Euro Style Terminal Block • Ture Zero Output for Voltage Unit • Incorrect Wiring Protection • RoHS Compliant Operating Temperature Storage Temperature LED Indication Electrical Termination Pressure Fittings Zero & Span Adjustment Pressure Media Enclosure Weight Installation Green/Red Flashing... Damaged, Zero Calibration can not be completed Detachable Euro Style Terminal Block, 14-26 AWG 3/16” O.D. Barbed Brass for 1/8” I.D. Push-on Tubing Push button for Zero, Potentiometer for span Typically Air or similar non-conducting Gases Stainless Steel and PC+ABS Alloy, 94V-0 Rated Approx. 3.8OZ/108g See Diagram 1 for outline and dimensions. Visit us Online: www.alphainstruments.com E-mail: [email protected] 978-264-2

Electrical Data (Voltage) Circuit 3-Wire (+EXC, -EXC, OUTPUT),Protected against incorrect wiring Output Impedance ^5.0 OHMS * Span Factory Setting: +/-0.5%FS Calibrate with a 50K OHM load. Operable with a load greater than 5K OHM for 0-5VDC output, greater than 10K OHM for 0-10VDC output. Electrical Data (Current) Circuit 2-Wire(+EXC, -EXC), Protected against incorrect wiring Excitation 13-32VDC(see diagram 2 for maximum loop resistance) Bidirectional Output at Zero 12mA as standard External Load 0-950 OHM DIMENSIONS ARE IN* LnmJ A VOLTAGE DUTPUT UNIT IS SHDV/N. Ordering InformationCode all blocks...