4660 Pressure Pilot
Instruction Manual
Form 5200
September 2004
10
Figure 5. Set Point Adjustment Detail
48A3549-F
39A1578-A
A3300-1/IL
6. Refer to table 5 and turn the HIGH SET knob
clockwise to correspond to the desired set point
value. For example, with a 690 kPa (100 psig)
Bourdon tube, turn the knob five revolutions for a
desired high set point of 415 kPa (60 psig).
7. Turn the LOW SET knob clockwise until the low
set point pivot just comes in contact with the flapper,
moving the nozzle beam off the nozzle. The pilot
should have zero output pressure (black indication
on the optional output indicator).
8. Refer to table 5 and turn the LOW SET knob
clockwise to the desired set point value. For
example, with a 690 kPa (100 psig) Bourdon tube,
turn the knob two revolutions for a desired low set
point of 165 kPa (24 psig).
9. Lock the locking disks (key 69).
Pilots With Optional Set Point Indication
Make sure each of the following five steps have
been performed completely before setting the high
and/or low set point pressures. Key numbers are
shown in figure 8.
Table 5. Alternate Set Point Adjustment
BOURDON TUBE
RATING
PRESSURE
CHANGE
PER DOT
(1)
PRESSURE
CHANGE PER
REVOLUTION
bar
Psig
bar
Psig
bar
Psig
3.4
6.9
50
100
0.1
0.1
1
2
0.4
0.8
6
12
17.2
34.5
250
500
0.4
0.7
5
10
2.1
4.1
30
60
69.0
103.4
1000
1500
1.4
2.1
20
30
8.3
12.4
120
180
172.4
344.8
517.2
689.5
2500
5000
7500
10,000
3.4
6.9
10.3
13.8
50
100
150
200
20.7
41.4
62.1
82.7
300
600
900
1200
1. Six dots per revolution.
1. Refer to the warning at the beginning of the
Operating Information section. Be sure the Bourdon
tube contains no pressure.
2. Install either a pressure gauge or an optional
output indicator (key 88) in the output pressure line.
3. Remove the cover screws (key 6) and the cover
(key 4).
4. Turn on the supply pressure. To check that the
supply pressure is turned on, press the SUPPLY
TEST button located in the cleanout assembly (key
54) until a flow sound is heard.
WARNING
To avoid personal injury or property
damage caused by a sudden release of
pressure, do not exceed the process
pressure values in table 4.
5. Connect an external pressure source to the
process pressure connection. This external pressure
source should be a regulated air or gas supply that
is adjustable to zero. The external pressure source
must be capable of supplying a process pressure
that will be equal to or greater than the desired high
set point pressure.
6. Continue with the appropriate procedures
described below. Replace the cover and cover
screws after all adjustments are completed.
Setting the High and/or Low Set
Point(s)
1. Adjust the external process pressure source to
the desired high or low set point. For example, if the
pilot is to trip at 3.4 bar (50 psig), apply 3.4 bar (50
psig) to the pilot. Use a pressure gauge to measure
the process pressure.
2. Rotate the locking arm clockwise to unlock the
module. Slowly turn the HIGH SET or LOW SET
knob until the pilot trips.
