WirelessHART Rosemount 2160 WirelessHART, Справочное руководство, Страница: 39 / 100

Reference Manual
00809-0100-4160, Rev AB
March 2010
2-21
Rosemount 2160
CALIBRATION
Dry Fork Frequency
The 2160 detects the process is Wet or Dry by monitoring the vibrating fork
sensor frequency.
Dry Fork Frequency is set when calibrated under Dry
process conditions at the factory.
See also “Dry Fork Frequency / Switch Points” on page 2-18 for associated
parameters.
To view the dry fork frequency:
1. From the Home screen, select 3: Service Tools .
2. Select 4: Maintenance .
3. Select 3: Calibrate .
4. Select 1: Sensor Calibration .
5. Select 1: Dry Fork Frequency .
NOTE
The Fast Key sequence 3, 4, 1, 3, 1 also indicates Dry Fork Frequency.
Sensor Frequency
See “Sensor Frequency” on page 2-16 for a description of this parameter.
Calibrate Dry Fork
This command starts the on-site re-calibration of the vibrating fork sensor in
Dry process conditions . It should only be performed by authorized persons.
A comparison is made between the new dry fork frequency and original
factory-set Dry Fork Frequency value (page 2-21). If the difference is greater
than Allowable Change In Dry Fork Frequency (page 2-12), the
re-calibration is rejected. Check the fork for damage, corrosion, or coating,
and clean the fork if necessary before re-trying.
When the re-calibration is successful, Dry Fork Frequency is set to the new
dry frequency .
To start the on-site re-calibration:
1. From the Home screen, select 3: Service Tools .
2. Select 4: Maintenance .
3. Select 3: Calibrate .
4. Select 1: Sensor Calibration .
5. Select 3: Calibrate Dry Fork Frequency .
6. Input the process temperature when prompted.
Sensor Calibration
Status
The 2160 is supplied with a factory calibration but can be re-calibrated on-site
using the
Calibrate Dry Fork command (page 2-21).
Sensor Calibration Status indicates the 2160 is:
• Factory Calibrated – No further calibration is normally required .
• Site Calibrated – Calibration successfully performed on-site.
• Un-calibrated – Calibration is required. Contact the factory .
Fast Keys
3, 4, 3, 1, 1
Fast Keys
3, 4, 3, 1, 2
Fast Keys
3, 4, 3, 1, 3
Fast Keys
3, 4, 3, 1, 4