ABB LevelMaster 7100, User Manual, Page: 57 / 100

LevelMaster 7100 User manual 2105835 Rev AA | 47
If the user has been manually gauging the levels and is confident that the measurements are accurate, determine the need to
set a bias by comparing the reading level of each float to that of an actual measurement. If the level(s) differ significantly, the
user can enter the manually-measured levels in the LevelMaster to automatically generate calibration offset values.
IMPORTANT NOTES: Perform this procedure only if the LevelMaster(s) does not connect to a host controller
(standalone installation). When a MasterLink is connected to a flow computer or remote controller, configuring a
level bias is also possible through PCCU32. Adding a level bias through PCCU32 ensures that the record of the
adjustment is kept in the audit trail. If planning to connect to a flow computer or remote controller, skip this
procedure.
Because this procedure uses a direct connection using MasterLink, it must be performed before the card is
installed back into the enclosure and field connections to additional LevelMasters are restored.
To calibrate using manual measurements:
1. On the Setup tab, under Enter gauging tape measurement, type the measured value for the upper (or only) level in the
Tank Level 1 field.
2. Click Set Tank Level 1 .
3. Click OK when prompted.
4. If the LevelMaster has two floats, enter the value for the lower level in the Tank Level 2 field.
5. Click Set Tank Level 2 .
6. Click OK when prompted.
7. Follow the procedure in section 5.3.4, Verify calibration (standalone installations only), once the electronics board is
inserted back into the enclosure and connected to the sensor.
Verify calibration (standalone installations only)
Perform this procedure only if the calibration was done through MasterLink as described in section 5.3.3, Calibration (standalone
installations only) , above.
IMPORTANT NOTE: Verification of calibration consists of verifying that the actual level readings of the
LevelMaster, once inserted in the tank, agree with the tank levels inserted manually. Follow the steps below once
the electronics board is inserted back into the enclosure and connected to the sensor. It is assumed that the unit
has already been inserted into the tank and the configuration was done with the electronics board removed from
the unit.
1. Reinstall the electronics board in the enclosure and connect to the sensor.
2. Reconnect the laptop to the electronics board and restablish communication.
3. Once succesfully connected, click on the Monitor tab.
4. Check the Continuous Monitor box and wait for an update. The new reading(s) should agree with the entered value(s).
Save the LevelMaster configuration
After all configuration is completed, save the LevelMaster configuration for backup purposes. The following procedure creates a
configuration file and saves it onto the laptop where it can be retrieved later if needed (see section 8.10,
Restore sensor data
and configuration ). If the unit's configuration is inadvertently changed, corrupted, or there is need for part replacement, the
configuration file can be used to restore the configuration of the LevelMaster, saving configuration time. A configuration file
stores calibration data as well.
To save the configuration of the LevelMaster:
1. Click Upload/Download .
2. Under Read data from the LevelMaster and save them to file, use the default path and file name displayed or select a
different path and/or user-defined file name. (If changing the name, ensure the file keeps the .dat extension.) The default
name is the base serial number of the LevelMaster.