Siemens Sitrans, LC 500 instruction manual Calibration using push-button adjustment

Calibration using push-button adjustment

Notes:

•To toggle between menu level 0 and menu level 1, set rotary switch to 0, and use RED (+) or BLUE (–) push-button to select menu.

•To reset values to factory settings, select menu 12. Press and hold both buttons: the LCD displays do it, followed by FAC A when the buttons are released.

•For a complete list of menu items, see Appendix A: Menu Groups, page 54.

Reset keylock level if necessary to enable settings to be changed: menu 1F

(no change is necessary if the factory setting has not been changed)

1.Select menu 10, then set the rotary switch to F.

2.Use the BLUE (–) push-button to decrease the value to 0: display reads PL 0 (no restrictions).

Reset selection for transmitter variable if necessary to TV0 (units are pF): menu 01

(no change is necessary if the factory setting has not been changed)

1.Select menu 00, then turn the rotary switch to 1.

2.Use the BLUE (–) button to adjust the value to 0: the display reads Pv = 0.

Calibrate the 0% setting (LRV - lower range value): menu 0E

For instruments without a stilling well, the 0% setting needs to be calibrated after the device is installed, and with the tank/vessel empty. Calibration is also sometimes necessary after installing a SITRANS LC 500 fitted with a stilling well, although in most cases the 0% setting is calibrated at the factory.

1.Set value for 0% (LRV): units must be pF (Menu 01 must read Pv = 0)

a.Bring the product level to the height that corresponds to 0%.

b.Set the rotary switch to E (Empty).

c.Press both buttons and hold for about 1 second: the 0% point is now set.

Calibrate the 100% setting (URV - upper range value): menu 0F

•method 1: if it is possible to bring the actual product level to 100%

•method 2: if the current product level is known, you can calculate the percentage value, and calibrate for full scale in %. The closer the actual level is to 100%, the more accurate this result will be.

Method 1. Set value for 100% (URV): units must be pF, (at Menu 01, Pv = 0)

a.Raise the product level to the height that corresponds to 100%

b.Set the rotary switch to F (Full).

c.Press both buttons and hold for about 1 second: the 100% point is now set.

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7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 43