Fairchild T79 Series Maintenance And Operating Instructions Download | Manualshive

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FAIRCHILD MODEL T79xx SERIES

ELECTRO-PNEUMATIC TRANSDUCERS

(Analog Output)

Operation and Maintenance Instructions

Software Version 3.45 and 3.46

SPECIFICATIONS

Figure 2.

Model T7950 Keypad

Figure 1.

Model T7900

Keypad

Figure 3.

Model T79xx Series Transducer Keypad Functions

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Summary of Contents for T79 Series

Page 1: ...RO PNEUMATIC TRANSDUCERS Analog Output Operation and Maintenance Instructions Software Version 3 45 and 3 46 SPECIFICATIONS Figure 2 Model T7950 Keypad Figure 1 Model T7900 Keypad Figure 3 Model T79xx Series Transducer Keypad Functions ...

Page 2: ...an internal electronic pressure sensor to achieve high accuracy pressure control Flexible configuration and PID tuning capability ensure that these pressure controllers can meet the most de manding air pressure control applications SPECIFICATIONS Model T7900 Model T7950 Electrical Supply voltage 11 24 VDC Power consumption Less than 4 watts Analog input Current mode input range 0 24 mA 35 mA maxim...

Page 3: ...entered on the setpoint which the unit does not respond Control Value Displays control input value Option Value Displays the feedback option output value Control Value 1 Sets the 0 Control Input value Control Value 2 Sets the 100 Control Input value Option 1 Sets the value of the current or voltage proportional to P1 Option 2 Sets the value of the current or voltage proportional to P2 2 Records th...

Page 4: ...Figure 2 Model T7950 Menu System 4 ...

Page 5: ...o Remote The Model T7900 T7950 control input channel is configured to accept an analog control signal to control the setpoint The Control Value displays the cur rent or voltage signal value at the control input terminals under all configurations The relationship between the control input signal and the output pressure is determined by and settings in the Configuration menu Output Control Analog Ou...

Page 6: ...unctions as setpoint control to the Model T7900 7950 Control Input set to LOCAL chooses the Setpoint using the keypad to control the output pressure In this mode the Model T7900 7950 control functions disregard the analog input channel NOTE The Control Input and the Analog Output Connection have four setting combinations that confi gure the Model T7900 7950 operation See Table 5 Quick Setup Calibr...

Page 7: ...tively mA 0 00 30 00 4 00 and 20 00 The Option Value will vary between 4 mA and 20 mA proportinally following the pressure output between 0 and 30 psig To achieve a reverse acting relationship set 20 00 and 4 00 or set 30 and 0 Look Ahead Items and Configuring Menu Tuning Coefficients The Model T7900 T7950 ships from the factory with nomi nal PID values Tune the PID coeffecients and for optimum pe...

Page 8: ...Kit 19715 2 3 To replace the solenoid valves in the Model T7950 install Service Kit 19715 1 4 For the Model T7900 install Service Kit 19375 1 5 To replace solenoid valves in the Model T7900 order quantity 2 of Part Number 290 IPI 001 2 Check the supply filter Check the supply pressure Check the inlet screen in the booster Check the power supply Check for an existing Input Signal Check for loose fi...

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