Internal Calibration (Ical) - FlowLine LI25 Series Instruction Manual

LI25 Series Loop-Powered Meters

Internal Calibration (ICal)

•
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. 0 00 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. 0 00 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.
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Instruction Manual