7
HAZARDOUS AREA CLASSIFICATION
FM (Factory Mutual) Approvals:
Intrinsically Safe:
Catalog Versions: TAFI7800, TDFI7800
Class I,II,III Div 1 Groups CDEFG T4
ED-18970; Entity
I/O AEx ia IIB T4
-40°C to +80°C
Non-Incendive:
Class I, Division 1, Groups C and D;
Temperature Code T6.
Class I, Division2, Groups A, B, C and D;
Class II, Division 2, Groups E, F, and G;
Type 4 Enclosure;
Rated 4-20 mA, 30 VDC Maximum;
Temperature Code T6.
CSA (Canadian Standards Association) Approvals:
Intrinsically Safe: (4-20 mA only)
(TDCI7800, TACI7800)
Division 2 Approvals: (4-20 mA only)
(TDCI7800, TTCI7800, TRCI7800)
Class I, Division 2, Groups A, B, C and D;
Rated 4-20 mA, 30 VDC Maximum;
Temperature Code T6.
(TACI7800)
Class I, Division 1, Groups C and D;
Class II, Division 1, Groups E, F, and G;
Type 4 Enclosure;
Rated 4-20 mA, 30 VDC Maximum;
Temperature Code T6.
(TTCI7800, TRCI7800)
Approvals are valid when connected through a Shunt
Zener Diode Safety Barrier meeting the following
parametric requirements:
System
Type 2:
Dual Channel Polarized Rated: 28.5V Max. 300
Ohm Min. and 28V Diode return per channel.
Dual Channel Polarized Rated: 28.5V Max.
300 Ohm Min. and 10V Max. 50 Ohm Min.
System
Type 3:
Single Channel Polarized Rated: 28.5V
Max. 300 Ohm Min.
System
Type 1:
Class I,II,III Div 2 Groups ABCDEFG T6
ED-18970; NIFW
-40°C to +80°C
Enclosure Type 4X
Class I,II,III Div 1 Groups CD T4
ED-18970; Entity
I/O AEx ia IIB T4
-40°C to +80°C
Non-Incendive:
Class I,II,III Div 2 Groups ABCD T6
ED-18970; NIFW
-40°C to +80°C
Entity Parameters
Vmax
1
= 28VDC
Ci
4
= 12nF
Imax
2
= 100mA
Li
5
= 0mH
Pmax
3
= 0.7W
1
Vmax = Maximum Voltage
4
Ci = Capacitance
2
Imax = Maximum Current
5
Li = Inductance
3
Pmax = Maximum Power
Nonincendive Field Wire Parameters (NIFW)
Vmax
1
= 30VDC
Ci
3
= 0uF
Imax
2
= 120mA
Li
4
= 0mH
1
Vmax = Maximum Voltage
3
Ci = Capacitance
2
Imax = Maximum Current
4
Li = Inductance
HAZARDOUS AREA CLASSIFICATION
CONTINUED ON THE NEXT PAGE
1.
2.
3.
Shut off the valve that is supplying air to transducer.
It is not necessary to remove the Transducer
from the air line.
Remove the Orifice Assembly (6) from the unit. For
more detailed information see Figure 11. “Exploded
Drawing” on page 6.
Clean with alcohol and dry with compressed air.
To clean the Orifice, use the following procedure:
MAINTENANCE
Parts must be completely dry before reassembling.
If the standard maintenance procedure does not
correct the trouble, install Service Kit.
NOTES:
TROUBLE-SHOOTING
Table 6.
Trouble-Shooting.
Solution
(check)
Supply Pressure
Clogged Orifice
Connections
Zero and Span Adjust
Supply Pressure Low
Output Leakage
DC Signal
Loose Wires or Connections
Liquid in Air Supply
No Output
Leakage
Low or Improper
Span Adjust
Erratic Operation
WARNING:
Failure of Transducer could result in output
pressure increasing to supply pressure
possibly causing personal injury or damage
to equipment.
Problem
Intrinsically Safe:
Catalog Versions: TTFI7800, TRFI7800
