-17-
B.
Adjust the input simulator to the values of current shown below and observe the display.
The values shown for % open at each current input should now be calibrated to those
shown in the table within a range of +/- 0.50 %.
8 milliamperes
25%
12 milliamperes
50%
16 milliamperes
75%
20 milliamperes
100%
C.
Measure the 24 volt power supply current to the AGV5 valve with the valve 100% open.
The current from the power supply should be 2.25 amperes or less.
4.0 REPLACEMENT OF THE PRESSURE TRANSDUCERS
4.1 Replacement of pressure transducer (27a) can be performed in the field under the direction
of the distributor or Altronic personnel. The transducer (27a) is supplied in a kit (27) which
includes all of the necessary parts.
NOTE: When repairing or updating existing AGV5
units with S/N 1400 or lower, the obsolete pressure transducer and transducer housing
as well as the PCB assembly MUST be replaced. The obsolete pressure transducer is
identified by the presence of four wires rather than three. The obsolete transducer has
a white wire in addition to the normal black, red and green wires currently used. The
new pressure transducer and housing assembly with all of the required hardware is
available and comes completely assembled under kit part number 820022 (FIG.1B, 19).
A.
Remove the cover from the AGV5 housing by unscrewing it. See fig. 1A. Use a spanner
wrench or leather strap wrench to grip the cover.
B.
Examine and make notes of the AGV electronic board assembly (1a) which show the wire
routing and orientations.
