Page 102
STAT
IM 2000/2000S
Service Guide
96-106775 Rev 5.0
5. STAT
IM 5000S Calibration
9. Press the
SToP
button on the control box to end the steam generator calibration cycle
and to depressurize the cassette.
10. Press
SToP
a second time to reset the unit.
3. Chamber thermocouple and pressure transducer calibration
To calibrate the chamber thermocouple and pressure transducer:
11. Turn the power switch to
oFF
. Ensure the calibration jumper is in place and turn the power
switch
oN
. The LCD will read (for example):
12. With the calibration cassette removed and the pressure tubing disconnected at both ends,
compare the measured chamber pressure reading on the LCD to the pressure displayed
on the reference meter. The difference between them is the pressure transducer offset.
13. Fully insert the calibration cassette and connect the pressure calibration tubing.
14. To start a chamber thermocouple / pressure transducer calibration cycle, press and
release the UNWRAPPED cycle button and then press
START
. The STAT
IM 5000S will run
a regular UNWRAPPED cycle, but continue to display calibration information on the LCD.
15. Immediately after pressing the
START
button, use the UNWRAPPED and WRAPPED cycle
buttons to make the measured chamber pressure reading displayed on the LCD equal
to the reference meter reading. Note that once the boiler begins producing steam the
pressure cannot be accurately zero-adjusted to atmospheric pressure.
TIP
: The offset for
the measured chamber pressure is increased or decreased in 0.5 kPa steps. Each press of
the UNWRAPPED button adds 0.5 kPa and each press of the WRAPPED button subtracts
0.5 kPa.
16. Allow the chamber to reach the sterilization temperature. As pressure builds in the
chamber check for leaks in the cassette, associated piping and fittings. A steam leak in
the system will introduce errors in the measurement and will result in improper calibration
and may compromise sterilization conditions.
17. Once the unit has reached sterilization and the temperature and pressure are in equilibrium
compare the chamber temperature displayed on the LCD with the temperature displayed
on the temperature reference meter. Adjust the TC-ADJ potentiometer on the controller
board until the LCD temperature matches the reference temperature to within ± 0.25°C.
18. Wait ten seconds after the water pump turns off to allow the pressure and temperature
readings to stabilize before making any adjustments.
19.
IMPoRTANT NoTe:
When the initial pressure and temperature readings have been
adjusted, and to ensure equilibrium of the calibration, compare the measured chamber
pressure and the calculated chamber pressure displayed on the LCD. They should be
within 1 kPa of each other during equilibrium. If not, adjust the pressure offset using the
membrane keypad by ONE UNIT ONLY. If the readings still differ by more than 1 kPa,
using the TC-ADJ potentiometer adjust the chamber offset by ONE unit. If the readings still
differ by more than 1 kPa abort the cycle and retry the chamber thermocouple / pressure
transducer calibration.
F1
00
99
F1
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20.00°C
+1.00°C
STAT
IM
5000/5000S/5000 G4 Service Guide
