Emerson Fisher 4200 Instruction Manual page 19

Instruction Manual
D200354X012
Calibration of the instrument consists of adjusting the zero and span of the transmitter and/or adjusting the high and
low position switches for a specific travel. The high and low position switches also have deadband adjustments that are
made during the calibration procedures. Refer to figure 7 for transmitter and position switch conditions.
For a 4212 or 4222 instrument with position switch circuits only, refer to the high and low position switch adjustment
procedures in this section. For a transmitter with or without position switch circuits, refer to the transmitter circuit
zero and span adjustment procedures in this section.
If satisfactory results cannot be obtained during calibration, refer to the appropriate procedures in the Maintenance
section.
Figure 7. Transmitter and Position Switch Conditions (also see table 8)
ACTUATOR TRAVEL
UP OR DOWN
HIGH
ALARM
RANGE
REFER TO TABLE 8
FOR CONDITIONS
LOW
ALARM
RANGE
ACTUATOR TRAVEL
UP OR DOWN
NOTE:
1
WHEN USING THE COMMON (C) AND THE NORMALLY CLOSED (NC) TERMINAL
CONNECTIONS, THE CONTACTS WILL BE CLOSED WHEN THE RELAY COIL IS DE‐ENERGIZED.
A3787 / IL
TERMINAL CONNECTIONS
HIGH ALARM SETPOINT (TRIPS ON)
0-10% FULL SPAN
(TRIPS OFF)
(TRIPS OFF)
0-10% FULL SPAN
LOW ALARM SETPOINT (TRIPS ON)
CONTACT
CLOSED
DESIRED
DEADBAND
CONTACT
OPEN
DESIRED
DEADBAND
CONTACT
CLOSED
4200 Transmitters
March 2011
19