Siemens 7MJ2000-1A 00 Series Operating Instructions Manual page 40

Operation
6.3 Measuring menu
Automatic switching of the measurement channel
If a pre or main alarm is set on a measurement channel, the digital display automatically
switches over to this acoustic channel. If a main alarm is set, the measured value flashes in
the display.
Summation alarm
The summation alarm is set if one of the main alarms of an acoustic channel is set.
Sensor fault
If a measurement channel is defective, e.g. due to separation of the sensor cable or
infringement of the valid measuring range, the digital display will appear as follows:
①
②
③
④
Figure 6-4
Function test of the digital display
The digital display is tested as follows:
Press the <MEAS> button. If all elements of the digital display are visible, the digital display
is functioning correctly.
40
Symbol for sensor fault
Summation alarm, received from other acoustic channels
Number and name of the measurement channel
Associated value of the main alarm in dB
Digital display, acoustic channel defective
SITRANS DA400 for oscillating positive displacement pumps
Operating Instructions, 09/2008, A5E00841120-03