Operation
6.3 Measuring menu
SITRANS DA400 for material flow monitoring with protection against explosion
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Operating Instructions, 09/2007, A5E00841152-01
6.3.4.3
Test mode
Introduction
Test mode is used to check whether:
●
The acoustic emission sensor is assigned to the correct acoustic channel.
●
The acoustic emission sensor is functioning.
In test mode, the acoustic emission sensor is sensitive to both temporary knocking noise as
well as permanent flow-generated noise. The maximum sound pressure level measured is
saved and displayed.
Condition
The measurement channel must be in test mode. The measurement channel is in test mode
if the parameter P.1 to P.4 associated with the measurement channel is set to "tESt".
Elements of the digital display in test mode
Figure 6-7
Digital display test mode, acoustic channel
35.0
Generated measured value in dB; flashes if main alarm received
1/So1
Set measured channel 1
tESt
Notification that the test mode is activated.
Procedure
The measurement channel is tested as follows:
1.
Setting parameters for test mode
Press the <PAR> button for 5 seconds. "MEnu" and "PARAM" are shown in the middle
section of the digital display to the left and right respectively. "MEnu" flashes.
2.
Use the and buttons to select the parameters for the measurement channel to be
simulated. For measurement channel "1/So1", this is "P. 1" (SoCH1) for example.
3.
Use the and buttons to set the parameter value "tESt". "tESt" is shown to the left in
the middle section of the digital display. The digital display appears as follows:
Middle section: tESt SoCH1
Lower section: PAR P. 1
Test mode is set.
