Endress+Hauser HART Proline t-mass I 300, Руководство по эксплуатации

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Commissioning Proline t-mass I 300 HART
114 Hauser
Performing in-situ adjustment
1. Select the gas: Expert → Sensor → Measurement mode → Gas → Gas
 This entry is important for measuring device pressure and temperature
compensation.
2. Activate in-situ adjustment: Expert → Sensor → In-situ adjustment → Activate in-situ
adjustment
3. Confirm selection: Yes
 If an in-situ adjustment already exists, these adjustment points are loaded. An
existing adjustment (an entire series of flow points) can be deleted from the
measuring device using the "Clear values" function.
4. Select the reference value: Expert → Sensor → In-situ adjustment → Select flow
reference
 If volume flow is selected, it is important that the process pressure entered in the
measuring device is as accurate as possible. In the case of corrected volume flow
or FAD volume flow, the defined reference operating conditions must match
those of the reference measuring device.
5. Select the entry method for the reference value: Expert → Sensor → In-situ
adjustment → Input type reference value
 If "Manual" is selected, the operator must enter the flow value manually via the
display (or other operating interface). However, if "Current input" or "External
value" (via bus communication) is selected, the current flow values are displayed
as read only reference values. The available entry modes depend on the I/O
modules available.
The user can first approach the flow points with the facility. As soon as a desired flow
value is reached, the value can either be saved by confirming the value or be entered as a
fixed value by hand.
The entry method depends on the selected entry mode.
The measured flow value is checked to determine its validity on the basis of the following
criteria:
• Average absolute deviation of the flow value
• Standard deviation of the flow value
If a criterion is not met, the value is rejected and the message "Invalid" is displayed. If both
criterion are met, the message "Passed" is displayed. If the flow value fluctuates too much,
"Unstable" is displayed. If an existing adjustment is "readjusted", and with a maximum of 16
defined flow values, the flow value that is closest to the new adjusted value is replaced.
Here, "Replaced" is displayed as the status.
The user can also add a description to the adjustment. Three different text fields, with
16 alphanumeric characters per field, are available for this purpose. It is advisable to
use the text fields to identify the adjustment using the name of the gas/gas mixture
and the process conditions of the adjustment. If the in-situ adjustment is adjusted by
a calibration laboratory with the gas that is actually used by the operator, it is
advisable to also include the name of the laboratory, the date of the adjustment and
the name of the operator in the description.
Special cases
Individual flow point
A maximum of 16 flow points can be defined. However, in certain situations it may not
always be possible to adjust multiple flow points. In such cases, the measuring device can
be adjusted with just a few operating points. The minimum number of flow points that are
required is one. If only one operating point is adjusted, the measuring device uses default
values to replace the missing adjustment values. Therefore, the operator should be aware