Siemens SITRANS F TRANSMAG 2, Руководство по эксплуатации, Страница: 75 / 126

• ZPH, menu item 6.7.3
This is a factory-determined hydraulic calibration value at a flow of 0 m/s. This value is
automatically taken from the SmartPLUG of the measuring sensor. For older measuring
sensors without a SmartPLUG, the value must be transferred manually from the nameplate.
• Excitation frequency, menu item 6.7.4
This setting option depends on the type or the nominal width of the sensor or the probes.
Signal Transmitter Sensor Nominal width Magnet frequency
(=mains frequency
TRANSMAG 2 MAG 911/E Standard ap‐
plications (all) Bipolar prepulse f/5
MAG 911/E Rapid appli‐
cations (all) Bipolar f/3
MAG 911/E up to 1995 DN ≤ 150 Unipolar f/6
• Immersion check, menu item 6.7.5
The "Tube empty" detection depends basically on the conductivity of the medium. The
switching threshold is set to a typical value.
Adjustment may be necessary in special cases.
Here you have to determine the current internal measured values for electrodes 1 and 2 for a
filled and empty measuring tube under the menu items ’Act.Value El1’ and ’Act.Value El2’. The
switching threshold of the immersion check should be set under menu item ’Threshold’ to
about midway between these two values.
Functions
8.7 Function Group Service
TRANSMAG 2 with MAG 911/E
Operating Instructions, 03/2021, A5E00102775-AC
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