43
Class II Biological Safety Cabinets
Cause
Corrective Action
1080328) is
installed)
•
If you have input voltage but no output voltage replace the SMPS.
Defective
airflow sensor
power supply –
Switch Mode
Power supply
(Only when
SMPS (item
code 1080945)
is installed)
•
Cabinet must be turned on to perform this test.
•
Locate the terminal block.
•
On the side of the terminal block, measure the DC voltage between red and black pins.
Measure on the side, away from the SMPS. See Figure 5-1 and 5-2.
•
The voltage should be in range of +12VDC ± 10%.
•
The voltage has to be measured on the other side of terminal block and SMPS.
•
If out of range, check incoming power to the SMPS – check terminal where the cord is
connected. The input of SMPS should be ±10% of the cabinet incoming voltage
•
If input voltage is measured, but no output voltage, then replace the SMPS.
Figure 5-1 Figure 5-2
Cabinet
requires the air
flows to be set
•
Refer to the Test Report for this model and set the air flow values to the required
values. This information is also contained on the label at the bottom of the BLUE front
panel.
Filter loaded or
wrong speed
controller
setting
•
Plug in the voltmeter to the Motor Voltage Sampling Port.
•
Measure the actual airflow velocity using anemometer or flow hood. If actual airflow is
good but LCD still shows AIRFAIL, Proceed to the next step. If actual airflow is not good,
please adjust motor speed controller accordingly until alarm is turned off and the LCD
shows nominal airflow reading. After this, if LCD still shows AIRFAIL, Proceed to the
next step.
•
The sensor will take about 2-3 minutes before it can register a new airflow setting.
Note:
The cabinet must be certified at least annually.
•
If the blower is already operating at maximum voltage and the airflow alarm is still
triggered due to filter loaded, it’s time to change the filter.
•
If filter is not loaded, Proceed to the next step.
Faulty/
inaccurate
calibration
•
Re-calibrate the microprocessor. Follow the calibration procedure in the test report.
Warning:
To be carried out only by an authorized person.
CHECKING CALIBRATION DATA
•
After calibration is done, go to main display by pressing MENU button twice.
•
Press SET/Diagnostic button,
will display the mode and software version that is currently being used on the cabinet.
Example:
DIAGNOSTIC
MODE: NORMAL
CP104D VERSION 1.5
•
Press DOWN button until you find the following:
-
TEMPERATURE
: Shows actual ambient temperature
-
ADC IFF
: ADC value for Fail Point Inflow – calculated using offset based on Inflow
Nominal Point.
-
ADC IFN
: ADC value for Nominal Point Inflow – set during sensor calibration.
-
ADC IFA
: ADC value for Actual Inflow – showing real time sensor reading.
-
ADC IF0
:ADC value for factory calibrated Zero Point Inflow (no inflow)-set during zero
SMPS output
Red –
Black/blue is
12VDC
SMPS input Brown-
Blue-Green Yellow is
115V AC or 230V AC
Brown
Blue
G/Y
Black
Red
Negatif
Positive
SMPS
Terminal block
Summary of Contents for Class II
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