Fairchild T7800 Instrucciones Para La Instalación Operación Y Mantenimiento

FAIRCHILD T7800 STANDARD RANGE
MINIATURE ELECTRO-PNEUMATIC TRANSDUCER
Installation, Operation and Maintenance Instructions
Figure 1. Model T7800 Standard Range Transducer Identification Number System
GENERAL INFORMATION
The Model T7800 Series of Electro-Pneumatic Transducer
converts a DC input signal to a linearly proportional pneumatic
output pressure.
SPECIFICATIONS
Functional Specifications
psig
psig
[BAR]
[BAR]
(kPa)
(kPa)
3-15
3-27
Output
[0.2-1.0]
[0.2-1.8]
Range
(20-100)
(20-180)
Input
4-20 mA DC, 0-10 VDC,
1-9 VDC, 0-5 VDC, 1-5 VDC
Range
20-120
32-120
Supply
[1.5-8.0]
[2.2-8.0]
Pressure
(150-800) (220-800)
5 10
Minimum
[0.35] [0.7]
Span
(70)
(35)
Set Point
3 psig 9 psig
A i r C o n -
[0.2 BAR] [0.6 BAR]
sumption
(20 kPa) (60 kPa)
All Ranges 3.5 7.0
(SCFH) 3 3
(.10 m /HR) (.20 m /HR)
3
2.5 (4.25m /HR) @
Flow Rate
25 psig, [1.7 BAR],
( S C F M )
(170 kPa) supply &
9 psig, [0.6 BAR],
(60 kPa) output.
Temperature Operating . . . . . . . . . . . . . . . . . . . . .
Range
Storage . . . . . . . . . . . . . . . . . . . . .
S p a n / Z e r o
Screwdriver adjustments located on front
Adjustments
of unit
Required
Two Wire Current Input
Operating
7.2 VDC @ 20 mA (4-20 mA signal)
Voltages
Supply
Three Wire Voltage Input
Voltage
7-30 VDC, less than 3 mA
S i g n a l
Three Wire Voltage Input
Impedance
10 Kilohms
psig
[BAR]
(kPa)
6-30
[0.4-2.0]
(40-200)
35-120
[2.4-8.0]
(240-800)
10
[0.7]
(70)
30 psig
15 psig
[2.0 BAR]
[1.0 BAR]
(100 kPa) (200 kPa)
9.5
13.5
3 3
(.27 m /HR) (.38 m /HR)
3
9.0 (15.3m /HR) @
120 psig, [8.0 BAR],
(800 kPa) supply &
or
9 psig, [0.6 BAR],
(60 kPa) output.
-40 F to +160 F
(-40 C to +71.2 C)
-40 F to +180 F
(-40 C to +82.2 C)
Performance Specifications
+
Accuracy
(ISA S51.1) +
Hysteresis
(ISA S51.1)
Deadband
Repeatability
(ISA S51.1)
Position
Effect
Vibration Less than 1% of Span under the following
Effect conditions: 5-15 Hz @ 0.8 inches constant
displacement 15-500 Hz @ 10 g's.
R e v e r s e No damage occurs from reversal of normal
P o l a r i t y supply current (4-20 mA) or from mis-
Protection
application of up to 60 mA.
RFI/EMI Less than 0.5% of span @ 30 /m class 3 Band
ABC (20 to 1000 mHz) per SAMA PMC 33.1
Effect
1978 and less than 0.5% of span @ 10 /m level.
2 Ghz band per EN 61000-4-3:1998+A1 EMC
Directive 89/336/EEC European Norms EN
61326.
S u p p l y Effect
Pressure
Temperature + - [0.5% +0.04% / F Temperature Change] of
Span guaranteed
Effect
psig
[BAR]
(kPa)
3-15
Frequency
[0.2-1.0]
Response
(20-100)
-3 db @ 5 Hz per ISA S26.4.3.1
Materials of
Body and Housing . . . . . . .
Construction
Orifice . . . . . . . . . . . . . . .
Trim . . . . . . . . . . . . . . . . . . . . .
Elastomers . . . . . . . . . . . . . . . . . . . . . .
Finish . . . . . . . . . . . . .
1
0.25% Full Scale Guaranteed
0.15% Full Scale Typical
0.1% Full Scale
0.02% Full Scale
0.1% Full Scale
No measurable effect
+
v
v
No measurable effect
psig psig
[BAR] [BAR]
(kPa) (kPa)
3-27
6-30
[0.2-1.8]
[0.4-2.0]
(20-180)
(40-200)
load configuration A.
Chromate Treated
Aluminum
Nickel Plated Brass
& Sapphire
Stainless Steel
Brass & Zinc Plated Steel
Nitrile
Epoxy Powder Coating