Instruction manual

Instruction Manual
D200354X012
4200 Transmitters
July 2013
20
cover and connecting a milliammeter between TP1 (+) and TP2 (-) on the printed wiring board (figure 5) on 4210,
4211, 4215, 4220, or 4221 transmitter. On 4212 or 4222 connect a voltmeter between TP5 (+) and TP6 (-) to measure
potentiometer position.
Note
You will need to loosen the set screw (key 106) before removing the cover.
For position switch circuits, the switching condition can be monitored by observing the indicating device or using an
ohmmeter connected to the terminal blocks (TB1 and TB2) in the field wiring compartment. Refer to the Calibration
section for the test setup.
Calibration
Note
The potentiometer alignment procedures, in the Installation section, must be completed before performing instrument
calibration. Also, be sure the direct or reverse action is correct for the application.
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 9)
ACTUATOR TRAVEL
UP OR DOWN
REFER TO TABLE 9
FOR CONDITIONS
ACTUATOR TRAVEL
UP OR DOWN
TERMINAL CONNECTIONS
HIGH ALARM SETPOINT (TRIPS ON)
CONTACT
CLOSED
CONTACT
CLOSED
CONTACT
OPEN
DESIRED
DEADBAND
0-10% FULL SPAN
DESIRED
DEADBAND
(TRIPS OFF)
(TRIPS OFF)
LOW ALARM SETPOINT (TRIPS ON)
0-10% FULL SPAN
HIGH
ALARM
RANGE
LOW
ALARM
RANGE
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