Internal Calibration (Ical) - FlowLine DataLoop LI25 Series Instruction Manual

DataLoop™ LI25 Level Controller
Internal Calibration
• There is no need to recalibrate the meter for milliamps when first
received from the factory.
• The meter is factory calibrated for milliamps prior to shipment. The
calibration equipment is certified to NIST standards.
The internal calibration allows the user to scale the meter without applying a
signal. The use of a calibrated signal source is necessary to perform the internal
calibration of the meter. Check calibration of the meter at least every 12 months.
Notes:
• The signal source must have a full-scale accuracy of 0.01% or better
between 4 and 20 mA in order to maintain the specified accuracy of the LI25
Series.
• Allow the meter to warm up for at least 15 minutes before performing the
internal calibration procedure.
The Internal calibration menu is part of the Advanced features menu.
1. Press and hold the Menu button for five seconds to access the Advanced
features of the meter.
2. Press the Up arrow button to scroll to the Internal calibration menu (ICAL)
and press Enter/Ack.
3. The meter displays 4.000 mA. Apply a 4.000 mA signal and press
Enter/Ack. The display shows both trend arrows for a moment while the
meter is accepting the signal.
4. After the signal is accepted, the meter displays 8.000 mA. Apply an 8.000
mA signal and press Enter/Ack. The display shows both trend arrows for a
moment while the meter is accepting the signal.
5. Continue, as in the previous step, for the remaining signals: 12.000 mA,
16.000 mA, and 20.000 mA.
Error Message (Error)
An error message indicates that the calibration or scaling process was not
successful. After the error message is displayed, the meter reverts to the
previous signal prompt, allowing the appropriate input signal to be applied. The
error message might be caused by inadvertently leaving the signal at the
previous level.
MN301034 rev D
(ICal)
Instruction Manual
29