Smiths Graseby 3200, Technical & Service Manual

Page: 87 / 117

Smiths Medical International Ltd.
3200 Service Manual
Issue 5 (August 2004)
6 - 4
The following plunger clamp alarm checks are only required on pumps fitted with the old
style half nut, and not the more recent super nut (see page 5-8).
The dual ramp gauge (
part number 0131-0084) is used to check that the ....
PLUNGER CLAMP OPEN
alarm is operating correctly when the plunger clamp is set to two alternative infusing
positions, as shown below:
POSITION 2
L.H. RAMP
POSITION 1
R.H. RAMP
GM1086-A
Figure 6.1 Outline of dual ramp gauge
1. Fit the dual ramp gauge onto the pump.
2. Close the plunger clamp at a position that is just clear of the bottom end of the
right hand ramp.
3. Set the pump to infuse at a rate of 200 ml/h and press the START button.
4. Check that during the first 30 seconds of travel (as the leadscrew is fully
engaged), that the plunger clamp remains clear of the ramp.
5. Check that as the plunger clamp runs up the right hand ramp a ...
PLUNGER CLAMP OPEN
alarm occurs within 10 minutes of pressing the START button.
6. Repeat the above check with the plunger clamp placed just clear of the left
hand ramp.
If the pump fails the ramp gauge checks (on the earlier manufactured pumps) it is
recommended that the half nut is changed for a super nut (see page 5-8). Also ensure
that the three following modified items have been fitted:
1. A new style square shaped flag ( part number 0127-0019 , as shown below) in
place of the old style flag.
2. A new style shaft bracket ( part number 0127-0052 , as shown below). This
bracket is identified by a ‘V’ notch that appears on one of the prongs.
3. Two new thicker washers ( part number 5014-3020 ) in place of the previously
fitted thinner washers that are used for fixing the opto sensors board.
Plunger clamp open flag
Square shaft bracket
Notch
GM1087-B
Obsolete style flag
Figure 6.2 Ramp check - Square/Ramp style flags
Plunger clamp
alarm checks
Ramp check procedures
Plunger clamp alarm checks