Fisher i2P-100 User Manual

Instruction Manual
D103198X012
i2P-100 Transducer
July 2014
18
Figure 11. Fisher i2P‐100 Transducer Schematic
COIL
ZERO
AND
SPAN
CIRCUIT
DC
CURRENT
INPUT SIGNAL
PNEUMATIC RELAY
DIAPHRAGM
EXHAUST
DIAPHRAGM
OUTPUT
PRESSURE
MAGNET
BEAM
FLAPPER
NOZZLE
RESTRICTION
VALVE PLUG
SUPPLY PRESSURE
A3877-2
-
+
{
CURRENT‐TO‐PRESSURE
CONVERTER ASSEMBLY
FIELD TERMINATOR AND
ELECTRONICS CIRCUIT
F
F
Maintenance
Due to normal wear or damage from external sources such as debris in the supply medium, periodic maintenance or
repair of the transducer may be necessary. Maintenance of the transducer consists of troubleshooting, removal for
inspection, and replacement of component parts, as well as removal and inspection of the external removable
filter/restriction and cleaning or replacing as necessary (see figure 1).
WARNING
To avoid personal injury or property damage from the sudden release of pressure, air or natural gas:
D Always wear protective clothing, gloves, and eyewear when performing any maintenance operations.
D Do not remove the actuator from the valve while the valve is still pressurized.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
on both sides of the valve.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
WARNING
When using natural gas as the supply medium, or for explosion proof applications, the following warnings also apply:

Fisher i2P-100 Specifications

General

Brand	Fisher
Model	i2P-100
Category	Transducer
Language	English