1
FAIRCHILD T7800 EXTENDED RANGE
MINIATURE ELECTRO-PNEUMATIC TRANSDUCER
Installation, Operation and Maintenance Instructions
Figure 1.
Model T7800 Extended Range Transducer Identification Number System.
The Model T7800 Series of Electro-Pneumatic Trans-ducer converts
a DC input signal to a linearly proportional pneumatic output pressure.
GENERAL INFORMATION
Operating . . . . . . . . . . . . . . . . . . . . .
Storage . . . . . . . . . . . . . . . . . . . . .
Required
Operating
Voltages
Supply
Voltage
S i g n a l
Impedance
Two Wire Current Input
Three Wire Voltage Input
Three Wire Voltage Input
Temper-
a t u r e
Range
Span/Zero
Adjustments
Screwdriver adjustments located
on front of unit.
7.2 VDC @ 20 mA (4-20 mA signal)
7-30 VDC, less than 3 mA
10 Kilohms
Flow Rate
S C F M
0- 30 psig
SCFH
0- 60 psig
SCFH
0-120 psig
SCFH
Air Con-
sumption
Set Point
0 psig
[0 BAR]
(0 kPa)
15 psig
[1.0 BAR]
(100 kPa)
30 psig
[2.0 BAR]
(200 kPa)
60 psig
[4.0 BAR]
(400 kPa)
120 psig
[8.0 BAR]
(800 kPa)
Minimum
Span
0-30
[0-2.0]
(0-200)
Supply Pressure must be no less than 5 psig, [0.35 BAR],
(35 kPa) above maximum output.
4-20 mA DC, 0-10 VDC,
1-9 VDC, 0-5 VDC, 1-5 VDC
35-150
[2.5-10]
(250-1000)
12.5
[0.85]
(85)
0-60
[0-4.0]
(0-400)
25
[1.5]
(150)
65-150
[4.6-10]
(460-1000)
0-120
[0-8.0]
(0-800)
125-150
[8.8-10]
(880-1000)
50
[3.0]
(300)
psig
[BAR]
(kPa)
1
1
psig
[BAR]
(kPa)
psig
[BAR]
(kPa)
Functional Specifications
Output
Range
11.0 (18.7m /HR) @150 psig, [10 BAR],
(1000 kPa) supply & midscale output.
3
3.1
(.09 m /HR)
1.6
(.04 m /HR)
0.5
(.01 m /HR)
7.81
(.22 m /HR)
4.7
(.13 m /HR)
11.8
(.33 m /HR)
7.8
(.22 m /HR)
3.8
(.11 m /HR)
13.3
(.37 m /HR)
7.6
(.21 m /HR)
15.1
(.42 m /HR)
3
3
3
3
3
3
3
3
3
3
3
Supply
Pressure
Input
Range
-40 F to +180 F (-40 C to +82.2 C)
-40 F to +160 F (-40 C to +71.2 C)
SPECIFICATIONS
