Fairchild T7800 Installation, Operation And Maintanance Manual
FAIRCHILD T7800 STANDARD RANGE
MINIATURE ELECTRO-PNEUMATIC TRANSDUCER
Installation, Operation and Maintenance Instructions
Figure 1. Model T7800 Standard Range Transducer Identification Number System
Identification Number
1
2
Non-incendive (Division 2) approval on FM voltage
input units only.
Intrinsically Safe approval, including non-incendive
(Division 2), on 4-20 mA units only.
Electrical Connections
Underwriting Group
Approval Class
Input
Output
1/2 NPT Conduit
Fitting with Pigtail
Terminal Block
DIN 43650 Connection
Rack Mount
Factory Mutual
Canadian Standard
ATEX
Intrinsically Safe
Non-Incendive (Division 2)
4-20mA
1-5 VDC
0-5 VDC
1-9 VDC
0-10 VDC
3-15 psig
3-27 psig
6-30 psig
[0.2-1.0 BAR]
[0.2-1.8 BAR]
[0.4-2.0 BAR]
(20-100 kPa)
(20-180 kPa)
(40-200 kPa)
(A)
(T)
(D)
(R)
( )
(N)
I
(4)
(5)
(7)
(9)
(0)
(F)
(C)
(E)
(01)
(02)
(03)
(11)
(12)
(13)
(21)
(22)
(23)
Select appropriate psig, [BAR] or (kPa).
7800
T
1
2
GENERAL INFORMATION
The Model T7800 Series of Electro-Pneumatic Trans
ducer converts a DC input signal to a linearly proportional
pneumatic output pressure.
SPECIFICATIONS
Minimum
Span
3-15
[0.2-1.0]
(20-100)
4-20 mA DC, 0-10 VDC,
1-9 VDC, 0-5 VDC, 1-5 VDC
20-120
[1.5-8.0]
(150-800)
5
[0.35]
(35)
3-27
[0.2-1.8]
(20-180)
10
[0.7]
(70)
32-120
[2.2-8.0]
(220-800)
6-30
[0.4-2.0]
(40-200)
35-120
[2.4-8.0]
(240-800)
10
[0.7]
(70)
psig
[BAR]
(kPa)
psig
[BAR]
(kPa)
psig
[BAR]
(kPa)
Functional Specifications
Output
Range
Supply
Pressure
Input
Range
A i r C o n
s u m p t i o n
Set Point
3 psig
[0.2 BAR]
(20 kPa)
9 psig
[0.6 BAR]
(60 kPa)
15 psig
[1.0 BAR]
(100 kPa)
30 psig
[2.0 BAR]
(200 kPa)
All Ranges
(SCFH)
3.5
(.10 m /HR)
3
7.0
(.20 m /HR)
3
9.5
(.27 m /HR)
3
13.5
(.38 m /HR)
3
Flow Rate
( S C F M )
2.5 (4.25m /HR) @
25 psig, [1.7 BAR],
(170 kPa) supply &
9 psig, [0.6 BAR],
(60 kPa) output.
3
9.0 (15.3m /HR) @
120 psig, [8.0 BAR],
(800 kPa) supply &
9 psig, [0.6 BAR],
(60 kPa) output.
3
or
Temperature
Range
Operating . . . . . . . . . . . . . . . . . . . . .
Storage . . . . . . . . . . . . . . . . . . . . .
-40 F to +180 F
(-40 C to +82.2 C)
-40 F to +160 F
(-40 C to +71.2 C)
S p a n / Z e r o
Adjustments
Screwdriver adjustments located on front
of unit
Required
Operating
Vo l ta g e s
Two Wire Current Input
7.2 VDC @ 20 mA (4-20 mA signal)
Supply
Voltage
Three Wire Voltage Input
7-30 VDC, less than 3 mA
S i g n a l
Impedance
Three Wire Voltage Input
10 Kilohms