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CNGmass DCI
Endress+Hauser
Performing a zero point adjustment
1.
Operate the system until operating conditions have settled.
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, select the ZEROPOINT ADJUSTMENT function in the function matrix:
BASIC FUNCTIONS → PROCESSPARAMETER → ADJUSTMENT → ZERO POINT
ADJUSTMENT
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 = 84).
Use O or S to select START and confirm with F.
7.
Select YES at the prompt and press F again to confirm.
Zero point adjustment now starts.
– 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, the following error message appears on the display:
"ZERO ADJUST NOT POSSIBLE".
– When the zero point adjustment completes, the "ZERO ADJUST." function reappears on the
display.
8.
Back to the HOME position:
– Press and hold down Esc key (X) for longer than three seconds or
– Repeatedly press and release the Esc key (X).
6.6
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 unplugging and plugging such modules, device
configurations can be duplicated onto other measuring devices, to cite just one example.
6.6.1
HistoROM/S-DAT (sensor-DAT)
The S-DAT is an exchangeable data storage device in which all sensor relevant parameters are
stored, i.e., diameter, serial number, calibration factor, zero point.
6.6.2
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). Detailed instructions regarding this can be found
in the manual "Description of Device Parameters", GP001D/06/ (function "T-DAT SAVE/LOAD",
No. 1009).
Commissioning
53
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