Pneumatic Transmitters Model 173 Pneumatic Pressure Transmitters Introduction Description The Model 173 Pneumatic Pressure Transmitter was designed to measure process pressures and transmit a 3 to 15 psi pneumatic signal proportional to the input span for indication, recording, or pneumatic control. Reverse acting transmitters are available; however, the transmitter is typically direct acting. As such, the pneumatic output will increase when the process pressure increases. Spans may be suppressed within certain limits. They can also be changed by replacing the measuring element or simply replacing the motion transmitter range spring. Its helix-type, pressure-sensing element develops many times the two-gram force required for full-scale operation of the transmitter pilot, thereby ensuring maximum accuracy. Rebalance occurs when the output increases enough to force the bellows assembly upward, returning the annular nozzle to its original pilot position. The amount of output change required to accomplish rebalance depends upon the motion transmitter range spring. Specifications Supply Pressure 8 Normal: 20 psig (1.38 bar) Maximum: 35 psig (2.41 bar) Minimum: 16 psig (1.10 bar) Output Pressure Range Output Pressure 3-15 psig 3-15 psig (0.2-1.0 bar) Supply Pressure Requirements Process Pressure Spans Normal: 20 psi Minimum: 16 psi Maximum: 35 psi 173N: Minimum: 15 psig (1.0 bar) Maximum: 6,000 psig (413 bar) Helix Element: Ni-Span C 173S:1 Minimum: 15 psig (1.0 bar) Maximum: 10,000 psig (689 bar) Helix Element: 316 SS Process-Connection High-Temperature Limit 316 SS and Ni-Span C elements: 250°F Approximate Net Weight Response Level 8 lbs. 0.08% of span Calibration Accuracy Reproducibility Transmitter range springs; 4950 or 7130 1, 2 or 3: ±1/2% of full scale 4: ±3/4% of full scale 5 or 6: ±1% of full scale 0.15% of span Ambient Temperature Limits -40 to 180°F (-40 to 82°C) Available Span Minimum: 15 psi Maximum: 10,000 psi 8.10 Optional Shock and Vibration Specification (Special order only) Conforms Naval Standards: Vibration: MIL-STD-167 Shock: MIL-S-901C Pneumatic Transmitters Model 173 Pneumatic Pressure Transmitters Technical data Performance Data Drift Unless otherwise stated, the following test conditions apply: 20 psi supply; 3-15 psi output; 316 SS helix element; 0-50 psi input pressure. Within 2% of full scale Response Level Within 0.1% of full scale Frequency Response Breakpoint frequency: 6.5 cps Phase angle at breakpoint: 110° Repeatability Within 0.1% of full scale Linearity #1,2 and 3 range springs: within 0.5% of full scale #4 range spring: within 0.75% of full scale #5 and 6 range springs: within 1% of full scale Hysteresis Maximum difference between increasing and decreasing value of input corresponding to any one value of output. #1 and #2 range springs: within 0.4% of full scale #3 range spring: within 0.5% of full scale #4 range spring: within 0.75% of full scale #5 and #6 range springs: within 1% of full scale Deadspot Within 0.4% of full scale Tapping Error Within 0.1% of full scale Supply Pressure Effect #1 and #2 range springs: within 0.2% of full scale #3 range spring: within 0.7% of full scale #4 range spring: within 1% of full scale #5 range spring: within 1.3% of full scale #6 range spring: within 2% of full scale Ambient Temperature Effect Within 0.5% of full scale Effect of Flow on Output Pressure Output Flow 1 scfm 3 scfm Output Pressure Decrease within 1 "H2O within 1 psi Maximum Air Consumption 0.12 scfm Minimum Output Pressure Approx. 0.1 "H2O Mounting Dimensions 8 1) Material conforms to NACE standard MR-01-75. 2) The higher the range spring suffix number, the greater the span suppression. 3) See Range Selection Table on the following page 8.11 Pneumatic Transmitters Model 173 Pneumatic Pressure Transmitters Technical data Range Selection Table Material Action Part No.1 Prefix 316L SS 316L SS Ni-span C Ni-span C Direct Reverse Direct Reverse 20087 20088 20089 20090 Range Spring Identification2 Maximum and Minimum Process Pressure Spans Pressure Element S U F F I X OverRange Limit Upper Range Limit Max.3 Zero Supp. 4950-1 Red 4950-2 Black 4950-3 White 4950-4 Green 4950-5 Blue 4950-6 Yellow PSIG PSIG PSIG 7130-1 RedBlack 7130-2 BlackWhite 7130-3 WhiteGreen 7130-4 GreenBlue 7130-5 BlueYellow 7160-6 YellowBrown A 70 65 40 55-44 43-34 33-25 24-19 18-15 ----- C 145 120 90 110-190 85-70 65-50 45-37 36-28 27-20 D 215 180 135 165-135 130-100 95-75 70-60 55-42 41-30 E 320 270 200 250-200 190-150 145-115 110-85 80-65 60-50 F 500 420 300 380-310 300-240 230-175 170-130 125-100 95-75 G 700 590 450 550-440 430-340 330-250 240-190 180-140 135-105 H 1000 850 660 8200-660 650-580 570-380 370-280 270-210 200-160 J 1440 1200 900 1100-880 870-670 660-500 490-370 360-280 270-210 L 2200 1870 1300 1600-1300 1200-1000 990-750 740-560 550-420 410-300 M 3700 3100 2300 2800-2200 2100-1700 1600-1300 1200-930 920-700 690-530 N 5700 4800 3600 4400-3500 3400-2700 2600-2000 1900-1500 1400-1100 1000-850 P 8600 7200 5300 6600-5300 5200-4000 3900-3000 2900-2200 2100-1700 1600-1300 R4 15000 13100 7400 ----- 10000-8800 8700-6500 6400-4900 4800-3700 3600-2600 8 1) See table above for pressure element part no. suffix to be used with pressure element part no. prefix. 2) 4950- springs are used with 316L SS. 7130- springs are used with ni-span C elements. 3) In no instance may zero suppression plus span exceed the maximum operating pressure. 4) Available in 316L SS only. 5) Element and spring combinations should be selected by the following order of range springs: -2, -3, -1, -4, -5, -6. 8.12