Siemens Sitrans Start Up, For situations where the capacitance values are known in advance

Example 2

For situations where the capacitance values are known in advance.

1.Switch on the 275 and establish connection with the SITRANS LC 500.

a.Select: Online

b.Select: Device setup

c.Select: Diag service

d.Select: Calibration

e.Select: Enter values

f.Select: PV LRV

2.Enter required capacitance value for 0% of the range.

a.Select: PV URV

3.Enter required capacitance value for 100% of the range.

a.Select: Send (the values are now sent)

b.Select: Put loop in manual

c.Select: Return loop to auto

Example 3

For situations where the capacitance values are unknown, and the level of the product cannot be easily adjusted to 0% and 100%. In this case it is necessary to measure the capacitance value at various levels. These values can be read in % with the 275 communicator.

Note: The more accurately the values are measured at 0% and100%, the more accurate the final result will be.

1.Switch on the 275 and establish connection with the SITRANS LC 500.

a.Select: Online

b.Select: PV

c.The measured value can be read continuously, even if the current loop value is min. or max.

2.Write down the measured value in pF, and record the corresponding level.

Example:

•the measured PV value is 181 pF at 79%

•the measured PV value is 52 pF at 17%

(181– 52)pF = 2.08 pF per %. (79 – 17)%

Start Up

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 47