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FAIRCHILD T7800 EXTENDED RANGE
MINIATURE ELECTRO-PNEUMATIC TRANSDUCER
Installation, Operation and Maintenance Instructions
Figure 1. Model T7800 Extended Range Transducer Identification Number System.
GENERAL INFORMATION
The Model T7800 Series of Electro-Pneumatic Trans-
ducer converts a DC input signal to a linearly proportional
pneumatic output pressure.
SPECIFICATIONS
1
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Table of Contents
Related Manuals for Fairchild TT7800
Summary of Contents for Fairchild TT7800
- Page 1 FAIRCHILD T7800 EXTENDED RANGE MINIATURE ELECTRO-PNEUMATIC TRANSDUCER Installation, Operation and Maintenance Instructions Figure 1. Model T7800 Extended Range Transducer Identification Number System. GENERAL INFORMATION The Model T7800 Series of Electro-Pneumatic Trans- ducer converts a DC input signal to a linearly proportional pneumatic output pressure.
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Page 2: Hazardous Area Classification
Specifications (continued) FM Approval (continued): Non-Incendive: (4-20 mA and voltage input units) (TDFI7800, TAFI7800, TDFN7800, TAFN7800) Class I, Division 2, Groups A, B, C and D; Class II, Division 2, Groups F, and G; Class III, Division 2; NEMA 4X Enclosure; Temperature Code T4. - Page 3 TR Rack Kit. Physically, it is the same The Model T7800 is supplied with a Mounting Kit EA- as the TT7800 (Terminal Block) Unit except 16799-1 for Panel or Wall Mounting and a Mounting Bracket that the terminal block has been rotated to the Kit EA-16893-1 for Din Rail Mounting.
- Page 4 5 15/64 133.0 4 57/64 124.3 1/4 NPT 1/4 NPT Outlet Inlet Port (2) Port (2) (typical) (typical) Figure 4. TT7800 Outline Dimensions. 1 5/16 90 Alternating 33.3 Positions 1 27/64 36.2 4 21/32 1 11/16 118.1 42.9 1/4 NPT...
- Page 5 Installation (continued) Figure 7. Din Rail Mounting Kit EA-16893. (Included with Unit) Figure 8. Optional Mounting Kit EA-19254-1. (Sold Separately)
- Page 6 Electric Connections Pneumatic Connections Make connections to the Terminal Block, Conduit Connec- Clean all pipelines to remove dirt and scale before instal- lation. tor or the DIN Connector as shown below in Figure 9. “Electrical Connections”. Apply a minimum amount of pipe compound to the male threads of the fitting only.
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Page 7: Split Range Operation
CALIBRATIONS / ADJUSTMENTS SPLIT RANGE OPERATION Equipment Required for Calibration: Lo/Hi Span Adjustment • Pneumatic Supply capable of delivering up to 150 psig. Set the Lo/Hi Span switch to the Lo position for 0-15 psig, 15-30 psig, 0-30 psig, 30-60 psig, 0-60 psig, or •... -
Page 8: Damping Adjustment
Calibrations / Adjustments (continued) Table 3. Full Range Operation. Table 4. Split Range Operation. Span Span Input Output Input Output Position Position psig (kPa) psig (kPa) 0-15 0-100 0-30 0-200 4-20 mA, 0-5, 1-5, 15-30 100-200 0-60 0-400 0-10 & 1-9 VDC 4-20 mA, 0-5, 1-5, 0-30 0-200... - Page 9 Table 5. T7800 Transducer Components. Item Qty. Description Cover, Machining Screw Screw Gasket Nozzle Body Assembly Orifice Assembly Orifice Assembly Orifice Assembly Spring Disk Diaphragm Spacer Ring Diaphragm Assembly Foam Block Valve Body Assembly Screw Pintle Spring, PIntle O-Ring Plug Screw Diaphragm Spacer Ring...
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Page 10: Maintenance
The information set forth in the foregoing Installation, Operation and Maintenance Instructions shall not be modified or amended in any respect without prior written consent of Fairchild Industrial Products Company. In addition, the information set forth herein shall be furnished with each product sold incorporating Fairchild's unit as a component thereof.