Memory (Historom); Historom/T-Dat (Transmitter-Dat) - Endress+Hauser Proline Prosonic Flow 93 PROFIBUS DP/PA Operating Instructions Manual

Commissioning
130
Performing a zero point adjustment
Note the following before you perform a zero point adjustment:
• A zero point adjustment can be performed only with fluids that have no gas or solid contents.
• Zero point adjustment is performed with the measuring tubes completely filled and at zero flow
(v = 0 m/s). This can be achieved, for example, with shutoff valves upstream and/or downstream
of the sensor or by using existing valves and gates.
– Standard operation → Valves 1 and 2 open
– Zero point adjustment with pump pressure → Valve 1 open / Valve 2 closed
– Zero point adjustment without pump pressure → Valve 1 closed / Valve 2 open
1. Operate the system until normal operating conditions resume.
2. Stop the flow (v = 0 m/s).
3. Check the shutoff valves for leaks.
4. Check that operating pressure is correct.
5. Using the local display or an operating program, select the ZEROPOINT ADJUSTMENT
function in the function matrix:
BASIC FUNCTION (G) → PROCESS PARAMETER (GIA) → ADJUSTMENT (648) →
ZERO POINT ADJUST (6480).
When you press O or S you are automatically prompted to enter the access code if the
6.
function matrix is still disabled. Enter the code (factory setting = 93).
Now use O or S to select START and confirm with F. Acknowledge the security prompt with
7.
YES and confirm again with F. Zero point adjustment is now started.
– The message "ZEROPOINT ADJUST RUNNING" appears on the display for 30 to 60 seconds
while adjustment is in progress.
– If the flow in the pipe exceeds 0.1 m/s (0.3 ft/s), the following error message appears on
the display: ZERO ADJUST NOT POSSIBLE.
– When the zero point adjustment is completed, the "ZERO ADJUST" function reappears on
the display.
8. Back to the HOME position:
– Press and hold down the Esc keys (X) for longer than three seconds or
– Repeatedly press and release the Esc keys (X).
6.10

Memory (HistoROM)

At Endress+Hauser, the term HistoROM refers to various types of data storage modules on which
process and measuring device data are stored. By plugging and unplugging such modules, device
configurations can be duplicated onto other measuring devices to cite just one example.
6.10.1

HistoROM/T-DAT (transmitter-DAT)

The T-DAT is an exchangeable data storage device in which all transmitter parameters and settings
are stored.
Storing of specific parameter settings from the EEPROM to the T-DAT and vice versa has to be
carried out by the user (= manual save function). Please refer to Page 95 for a description of the
related function (T-DAT SAVE/LOAD) and the exact procedure for managing data.
Proline Prosonic Flow 93 PROFIBUS DP/PA
Endress+Hauser