Commissioning; General Requirements; Zero Point Adjustment - Siemens SITRANS F C MC2 Operating Instructions Manual

Commissioning

6.1

General requirements

Before commissioning it must be checked that:
● The device has been installed and connected in accordance with the guidelines provided
● Device installed in hazardous location meets the requirements described in "Installation in
6.2

Zero point adjustment

Commissioning the device includes performing a zero point adjustment. In the following it is
described how to prepare for a zero point adjustment, and how to activate an auto zero point
adjustment.
Before zero point adjusting
● Install shut off devices in the pipeline. - When possible, both up- and downstream of the
Auto zero point adjustment
● Acclimate the transmitter (min. 30 min).
● Pump liquid at max. flow through the sensor (min. 2 min) in order to avoid air in the liquid.
● Stop the flow while pumping by shutting off the outlet valve and then the inlet valve. Wait
● Perform an auto zero point adjustment:
SITRANS F C MC2
Operating Instructions, 10/2009, A5E02154544-02
in chapter 4 "Installing / Mounting (Page 15)" and 5 "Connecting (Page 21)"
hazardous location (Page 8)"
sensor. Otherwise: in horizontal installations at the outlet -in vertical installations at the
inlet
CAUTION
In order to avoid damaging the pump and interrupting the process it is recommended to
install a bypass line
min. 1 min. In this way there will be zero flow but the liquid remain pressurized within the
sensor, which hinders de-gassing of the liquid, i.e. the release of air or other gas from the
liquid.
Note
The flow must be completely stopped and the sensor completely filled with liquid.
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