Endress+Hauser Waterpilot FMX21 - Linearization

Waterpilot FMX21 Commissioning
Endress+Hauser 59
FXN520
1 2 3 4
A0018764
1 Fieldgate FXA520
2 Multidrop connector FXN520
3 Temperature head transmitter TMT182 (burst mode)
4 Waterpilot FMX21
Configuring the HART-compliant temperature head transmitter (min. HART 5.0) with burst
function
The output current of the temperature head transmitter used should be set to "Fixed" and must have a
HART address other than zero (e.g. address = 1). The burst function must then be switched on with HART
command 1. This step should be performed before the procedure described below in order to avoid a
HART input error of the FMX21 being output during commissioning.
1 Select the "Level" measuring mode via the "Measuring mode" parameter.
Menu path: Setup → Measuring mode
L
WARNING
Changing the measuring mode affects the span (URV)
This situation can result in product overflow.
‣
If the measuring mode is changed, the setting for the span (URV) must be checked in the "Setup"
operating menu and readjusted if necessary.
2 Select a pressure unit via the "Press. eng. unit" parameter, here "mbar" for example.
Menu path: Setup → Press. eng. unit
3 The sensor is unpressurized, perform a position adjustment →  40
4 Set the "Auto dens. corr." parameter to "External value".
Menu path: Expert → Application
5 Perform level adjustment (wet or dry)
Result: The measured value output by the Waterpilot equals the level in the deep well corrected by means
of the density characteristic line of the water.
The TMT182 temperature head transmitter is not suitable for this configuration.
9.12 Linearization
9.12.1 Semi-automatic entry of a linearization table
Example:
In this example, the volume in a tank with a conical outlet should be measured in m
3
.