Emerson Fisher FIELDVUE DVC6000f, Instruction Manual

Page: 251 / 384

Calibration
December 2009 5-5
Figure 5-2. Relay A Adjustment (Shroud Removed for Clarity)
ADJUSTMENT DISC
FOR SINGLE-ACTING DIRECT RELAYS:
ROTATE ADJUSTMENT DISC IN THIS
DIRECTION UNTIL IT CONTACTS THE
BEAM
FOR DOUBLE-ACTING RELAYS:
ROTATE ADJUSTMENT DISC IN
THIS DIRECTION TO DECREASE
OUTPUT PRESSURE
FOR DOUBLE-ACTING RELAYS:
ROTATE ADJUSTMENT DISC IN
THIS DIRECTION TO INCREASE
OUTPUT PRESSURE
W9034
With the the low bleed relay option, stabilization may
take up to two minutes longer than the standard relay.
Relay A may also be adjusted for use in single-acting-
direct applications. Rotate the adjustment disc as
shown in figure 5-2 for single-acting direct operation.
Single-Acting Relays
WARNING
If the unused port is monitoring
pressure, ensure that the pressure
source conforms to ISA Standard
7.0.01 and does not exceed the
pressure supplied to the instrument.
Failure to do so could result in
personal injury or property damage
caused by loss of process control.
Single-Acting Direct Relay
The single-acting direct relay is designated by “Relay
C” on a label affixed to the relay itself. Relay C
requires no adjustment.
Single-Acting Reverse Relay
The single-acting reverse relay is designated by
“Relay B” on a label affixed to the relay itself. Relay B
is calibrated at the factory and requires no further
adjustment.
Travel Sensor
(TB
>
Configure/Setup
>
Calibration
>
Travel Sensor)
The travel sensor is normally adjusted at the factory
and should not require adjustment. However, if the
travel sensor has been replaced, adjust the travel
sensor by performing the appropriate procedure. See
the Maintenance section for Travel Sensor
Replacement procedures.
WARNING
During a travel sensor adjustment, the
valve may move. To avoid personal
injury and property damage caused
by the release of pressure or process
fluid, provide some temporary means
of control for the process.
DVC6010f, DVC6015, DVC6030f and
DVC6035 Digital Valve Controllers
1. Remove supply air and remove the instrument from
the actuator.
5