58
8011703/XF49/2019-09| SICK
O P E R A T I N G I N S T R U C T I O N S | VICOTEC320
Subject to change without notice
9
MAINTENANCE
4
Attach the test tool on the front of the sender/receiver unit.
Fig. 42: Attach the test tool on the front of the sender/receiver unit.
5
Click the [Start Span test] button.
>>> The system performs a zero adjust with the test reflector, followed by a reference
cycle. The current status is shown in the Operating state text field.
>>> The process takes approx. 10 minutes and is terminated when “
Spantest (insert
cuvette)
” is displayed.
6
Check the signal strength
▸
Menu:
Diagnosis/Sensor values/Spectra/Measurement reflector
.
>>> The maximum intensity for NO should be in the range from 23000 to 28000 and for
NO
2
in the range from 42000 to 48000.
7
Observe the measured values for the zero point for approx. 5 minutes and determine the
average zero point. Use this value as zero point offset for the next steps.
Example: The default values of the test cuvettes must be added to the zero point offset.
8
Insert cuvette or filter and wait for at least 5 minutes until the measurement has
stabilized.
9
Observe the displayed measured value for approx. 5 minutes and use the average value.
Compare the measured value with the default value of the test c zero point
offset (= actual default value). If required, calculate the correction factor (span
coefficient) (
see “Determination and setting of the span factors”, page 59
).
10
Repeat steps 7 to 9 for every test point.
11
Click [Maintenance] and wait until operating state shows “
Maintenance remove
cuvette
”.
12
Remove the test tool.
13
Restart the system:
▸
Menu:
Maintenance/Operating mode switch/System reset
▸
Click [Start system reset].
14
Wait for one minute. Reconnect SOPAS ET (switch “Online”).
15
Wait until the reference cycle has completed.
>>> The operating state is now “
Measuring
”.
The zero point offset can also be negative.
Do not remove test tool beforehand.
