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Display
Action
Step
Start the test, press
OK
. The test will ramp the chan-
nel up to 1 V and then decrease the signal in 10%
steps back to 0 V. The test is run continuously. Com-
pare the diagram of the chart recorder with the im-
age below.
3
1 V
0 V
Stop the test by pressing
Esc
.
4
Light intensity
This menu shows the voltages generated at the light detectors. These voltages are pro-
portional to the light intensities in each channel. The R-value gives an indication of the
condition of the lamp, filter and optical fibers.
Display
Action
Step
Select menu
Check
, press
OK
.
1
Select menu
Light Intensity
.
If the R-value is < 750 mV, check filter used time.
Change filter if the used time is > 2500 hours. If the
R-value still is < 750 mV after replacing filter, contact
GE.
2
Filter used time
This menu shows how many hours the filter has been used, i.e. the time in running mode.
There is one time counter for each filter wavelength.
Display
Action
Step
Select menu
Check
, press
OK
.
1
Monitor UVis-920 Operating Instructions 29055049 AD
51
5 Operation
5.9 Check menu