PRESSURE INDICATING CONTROLLER 4195 FISHER

The 4195K Series gauge pressure indicating controllers ( figure 1) show process pressure and set point on an easy-to-read process scale. The controllers, part of the versatile Wizard family of pneumatic instrumentation, compare process pressure with an operator-adjusted set point. The 4195K Series controllers then deliver a pneumatic signal to a control element so that process pressure changes toward the set point. Controller types are available for proportional-only, proportional-plus-reset, proportional-plus-reset-plus-rat e, and differential gap for on-off control. The 4195K Series controllers are used in industries where accurate pressure control and process monitoring are required. Unless otherwise noted, all NACE references are to NACE MR0175 2002. Note Available Configurations See table 1 Process( 1) Sensor Range ( Input Signal( 1) ) Lower and Upper Range Limits: As shown in tables 2 and 5. Maximum Allowable Pressure: As shown in tables 2 and 5. Process Scale Standard scale is matched to the range of the sensing element, with exception of receiver controllers. Optional scales available( 2) . Process Connections Standard: 1/ 4 NPT internal stainless steel ( all input ranges) Optional: 1/ 2 NPT external adaptors ( see table 3) Output Signal( 1) Proportional, Proportional-Plus-Reset, or Proportional-Plus-Reset-Plus-Rate Range:  0.2 to 1.0 bar ( 3 to 15 psig) or  0.4 to 2.0 bar ( 6 to 30 psig) Differential Gap Range:  0 to 1.4 bar ( 0 to 20 psig) or  0 to 2.4 bar ( 0 to 35 psig) Action: Field-reversible between  direct ( increasing sensed pressure increases output pressure) , and  reverse ( increasing sensed pressure decreases output pressure) action Supply and Output Connections 1/ 4 NPT internal Supply Pressure Requirements( 6) See table 4 Remote Set Point Pressures  0.2 to 1.0 bar ( 3 to 15 psig) or  0.4 to 2.0 bar ( 6 to 30 psig) Construction Materials See table 6 Controller Adjustments Proportional Band( 1) : 5 to 500% of process scale span Reset( 1) : Adjustable from 0.01 to more than 74 minutes per repeat ( from 100 to less than 0.0135 repeats per minute) Rate( 1) : Adjustable from 0 to 20 minutes Differential Gap( 1) Controllers: Adjustable from 5 to 100% of process scale span Set Point: Adjustable from 0 to 100% of the scale span Controller Performance Repeatability( 1) : 0.4% of output span Dead Band( 1) : Less than 0.4% of process scale span Typical Frequency Response( 1) : 1.5 hertz and 90 degree phase shift with 3.05 m ( 10 feet) of 6.4 mm ( 1/ 4-inch) tubing and 1639 cm3 ( 100 cubic inch) volume Steady-State Air Consumption( 1, 3, 4) 0.2 to 1.0 Bar ( 3 to 15 Psig) Output: 0.10 normal m3/ hr ( 3.5 scfh) 0.4 to 2.1 Bar ( 6 to 30 Psig) Output: 0.14 normal m3/ hr ( 5.0 scfh) Delivery Capacity( 3) 0.2 to 1.0 Bar ( 3 to 15 Psig) Output: 5.9 normal m3/ hr ( 240 scfh) 0.4 to 2.1 Bar ( 6 to 30 Psig) Output: 10.4 normal m3/ hr ( 350 scfh) Exhaust Capacity( 3) 0.2 to 1.0 Bar ( 3 to 15 Psig) Output: 4.6 normal m3/ hr ( 186 scfh) 0.4 to 2.1 Bar ( 6 to 30 Psig) Output: 7.0 normal m3/ hr ( 295 scfh) Operative Ambient Temperature Limits( 5, 6)  40 to 70 C ( 40 to 160 F)