Siemens LC 500, Sitrans instruction manual Calibration using Hart, Example

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Calibration using HART

The SITRANS LC 500 transmitter can be calibrated using HART, with a HART communicator1; a laptop running Simatic PDM, or with the Host system (DCS). The local circumstances determine the manner in which calibration takes place. If the circumstances allow the product to be brought to the 0% and 100% point level, calibration is simple.

Notes:

•Use the arrow keys, up, down, forward and back, to navigate within the menus.

•Use the back arrow to return to previous screens.

Examples of calibration using a Rosemount 275 hand-held communicator, fitted with the GENERIC device descriptor:

Example 1

For situations where the level of the product can be easily adjusted to 0 and 100%.

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

a.Select: Online

b.Select: Device setup

c.Select: Diag service

d.Select: Calibration

e.Select: Apply values

(Display reads: Loop should be removed from automatic control. Select: Ok)

f.Select: 4 mA

g.Select: Apply new 4 mA input

2.Bring the level of the product to the level which corresponds with 4 mA.

a.Select: Read new value

b.Select: Set as 4 mA value: the 4 mA point has now been set.

c.Select: 20 mA

d.Select: Apply new 20 mA input

3.Bring the level of the product to the level which corresponds with 20 mA.

a.Select: Read new value

b.Select: Set as 20 mA value: the 20 mA point has now been set.

c.Select: Exit

(Display reads: Loop may be returned to automatic control. Select: Ok)

Calibration is complete.

1.For a diagram showing how to connect the HART communicator, see Typical PLC configuration with HART on page 32.

Page 46 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01