SES 2000 Vac (LS3) AUTOCLAVE Part 3
ST-SM45g Page 35 of 53
PART 3 MAINTENANCE
l When the temperature setting is correct, check the
autoclave process display. If necessary, match the
display temperature to the temperature shown on
the chart recorder by adjusting of V4 (clockwise to
increase) on control board (Fig. 3.4).
m Check that the autoclave process display
corresponds with the temperature/pressure settings
shown in the table below. If necessary, calibrate the
autoclave process display by making small
adjustments of V6 (clockwise to increase) on control
board (Fig. 3.4).
Temperature/Pressure Settings
Temperature Chart Recorder Set Autoclave
Display (°C) Pressure trace (adjust V6) to
(kPa) DisplayPessure
All pressures are absolute and are measured in kPa
121.0 205.0 204/206
121.5 208.1 208/210
122.0 211.3 210/212
122.5 214.7 214/216
123.0 218.0 216/218
123.5 221.4 220/222
124.0 225.0 224/226
134.0 304.6 302/304
134.5 309.3 308/310
135.0 313.9 312/314
135.5 318.5 318/320
136.0 323.1 322/324
136.5 327.8 326/328
137.0 332.4 332/334
n Push switch SW1 (Fig.3.3) to decrease temperature
to 121°C and allow to stabilize for a minimum of five
minutes.
o Make sure that the temperature calibration, as
shown on the chart recorder, is still as specified in
para.63h. If adjustment is required, proceed as
detailed in para.63h.
p Check the autoclave display and make sure that it
corresponds to the temperature shown in the
‘Temperature/Pressure Settings’ table in para.63m.
If calibration of the autoclave display is required,
make small adjustments to V6 (clockwise to
increase) on control board (Fig. 3.4).
q Press switch SW1 (Fig.3.3) to return to 134ºC and
allow to stabilise for 5 minutes, re-check temperature
and pressure calibration. If necessary, re-calibrate
as detailed in paras.63k to 63p.
r On completion of calibration, seal potentiometers
V1, V2, V3, V4, V5 and V6 on control board with a
small quantity of anti-tamper sealant (Part
No.670678) between the adjuster screw and the
plastic body (not in the screw slots).
Note: If calibration of the autoclave cannot be achieved
using the calibration procedure, replace the control board
and repeat, the calibration procedure.
Pressure relief valve test
WARNING
During testing, high pressure steam will be
released from the pressure relief valve. Ensure
safety of all personnel.
64 The pressure relief valve should be tested every 12
months or at service intervals to ensure free movement
of parts. To test the pressure relief valve, proceed as
follows:
Note: The pressure relief valve is set to operate at
262kPa (gauge) but is allowed an over -pressure margin
of 10% maximum (i.e. 288.2kPa (gauge)).
If dealing with absolute pressure readings, subtract local
atmospheric pressure to obtain gauge values.
a
Calibrate the autoclave as detailed in para.57 onwards
and make sure that it is sterilizing at 134°C.
b Whilst in calibration mode press-and-hold switch
SW3. This will operate the heater element until the
switch is released.
c The temperature and pressure should increase until,
at approximately 345 kPa (absolute) as shown on
the chart recorder, the pressure relief safety valve
operates.
d Release switch SW3.
To Next Page
Loading...
