Zero Adjustment; Maintenance; Nameplate - Samson 3301 Mounting And Operating Instructions

5.4 Zero adjustment

If the measured temperature (reading at the
reference thermometer) and the adjusted set
point of the controller deviate from each oth-
er, you need to readjust zero.
1. Unscrew the four corner screws on the
cover and remove cover.
2. Use a screwdriver to hold the screw for
set point adjustment (8) inplace and turn
the set point pointer (7) until the indicated
value matches the temperature measured
at the reference thermometer.
Set point pointer (7)
Screw for set point adjust-
ment (8)
3. Adjust the set point again.
6

Maintenance

See Fig. 1 on page 6.
The controller only functions properly when
the supply air entering the device is always
clean. Therefore, check the air filter and trap
installed in the upstream air reducing station
regularly. If necessary, clean or renew the fil-
ter.
Insufficiently cleaned supply air will cause the
restriction (1) to become blocked.
EB 7065 EN
To clean the restriction, remove the nozzle
head (between the pneumatic connections un-
derneath the housing, see photo).
Screw with
catch
1. Undo screw for catch using a suitable
screwdriver.
2. Move the catch to release the nozzle
head.
3. Pull out the nozzle head. Use compressed
air to blow a blocked nozzle. Insert a fine
wire (max. Ø 0.25 mm) to remove any
stubborn dirt particles.
7

Nameplate

SAMSON 3301-
Pneumatischer P-Regler für Temperatur
Pneumatic P-Controller for Temperature
Régulateur pneumatique P de Température
2
Fig. 6: Nameplate
Maintenance
Nozzle head
1
3
Made in France
11