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11. O

PEraTiONal mOdEs

The level meters can either work in the "basic" mode that measures the level height (Fig. 18), or in

the "inverse mode" that measures distances (Fig. 19).

Fig. 18: Basic mode (measurement

of level height)

12. s

ETTiNg UP

After the level meter has been installed, set it up using the "DOWN" and "UP" buttons (see Fig. 17).

The LED indicator "MENU" indicates the on-going set-up procedure of the level meter. You can set

up the "basic mode", which measures the level height (Fig. 18) and set up the "inverse mode" to

measure distances (Fig. 19).

12. 1. B

asic mode

Low margin (4 mA or 0 V) setting up

The tank fills up to the level required

Press the "DOWN" button for at least 2 seconds to activate the set-up mode (the LED in-

dicator "MENU" blinks slowly). Keep the "DOWN" button pressed for another 3 seconds to

directly set the value to 4 mA (0 V). In this case, item 3 can be omitted.

Press the "DOWN" and "UP" buttons to accurately set-up an arbitrary value stepwise (hold the

relevant button to increase the adjustment step gradually).

Press both buttons simultaneously for at least 1 second to confirm the values set.

Further adjustment can't be performed sooner than 2 sec. after both of the buttons have been

released.

High margin (20 mA or 10 V) setting up

The tank fills up to the level required

Press the "UP" button for at least 2 seconds to activate the setting-up mode (the LED indica-

tor "MENU" blinks fast). Keep the "UP" button pressed for another 3 seconds to directly set

the value to 20 mA (10 V).

Fig. 19: Inverse mode (distance measurement)

ULM–53