JUMO flowTRANS MAG H01, Руководство по эксплуатации

Страница: 156 / 260

9 Advanced diagnostics functions
156
9.1.8 Fingerprint
The "fingerprint" database built into the transmitter can be used to compare the values at the time of fac-
tory calibration or startup with the values currently acquired.
9.1.9 Checking the grounding
This function offers the ability to check the electrical grounding quality. Flow metering is not possible
during the check.
Conditions for using the function:
• The measuring pipe must be completely filled.
• There must be no flow through the sensor.
• Maximum signal cable length in case of remote mount design type: 50 m (164 ft).
• For this function, the conductivity of the measurement medium must be between 20 µS/
cm and 20,000 µS/cm.
Additional installation conditions:
• There must be no pre-amplifier installed in the sensor.
9.2 Conducting the grounding check
1. Use or to select the "Grounding Check" item.
2. Use to start the "Grounding Check" function.
After starting the grounding check, the frequency range up to 250 Hz is measured. The 4 strongest
frequencies from the spectrum are displayed on the right side of the display.
Menu/parameter Value range Description
.../Diagnostics .../Diagnostics Control / ...Grounding Check
a
Grounding Check Starts the "Grounding Check" function
Power Spectrum Display only Displays the four strongest amplitudes in the power
spectrum
Amplitude 1 Display only
Amplitude 2 Display only
Amplitude 3 Display only
Amplitude 4 Display only
a
Only available for JUMO flowTRANS MAG S02/H02