Level Measurement - ABB 2600T Series Instructions For Installation Manual

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PHASE 4 - TRANSMITTER OPERATION

5.2

LEVEL MEASUREMENT

1. Vent all entrapped air from primary using vent/drain valves

on the transmitter, then close them.

2. Make sure to have the level in the tank at the required

reference (minimum) level

Note - In case it is not possible to empty the tank, it is

possible to follow the Zero Raise/Lower adjustment

procedure described in the reference manual.

3. After venting, the output should be 4 mA dc. If not:

a. Rotate the nameplate to get access to the external push

buttons.

b. Push the zero (Z) button on top of the transmitter (fig. 5.2)

for at least 2 seconds.

c. The output goes to 4 mA, and if present the integral

display, the message "ZERO PASS" will appear.

d. If a "WRITE DISABLE" message appears on the integral

display, check the dip switches settings (you need to

open the cover on the electronic side and to pull out the

integral display: see fig. 5.1).

e. In case of other diagnostic messages, see the reference

manual.

Max. Level

Min. Level

gate valve

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