Masibus LC5296-XP User Manual

Model: LC5296-XP-AT/LC5296-XP/LC5296-XP-I
Doc. Ref. no.:- m61D/om/101
Issue no. 17
User’s Manual Page 48 of 56
10. CALIBRATION PROCEDURE
10.1 Procedure for CAL-zero and CAL-span
 The instrument is factory calibrated for the specified range, but due to long
term drift of components, re-calibration may be necessary in some cases. For
calibrating the instrument a reliable source is required. This source should be
at least ten times accurate compared to the range of the instrument.
 The unit can be calibrated without opening it and without trimpots. To enter in
calibration mode press ‘ENT’ key consecutively in Run mode until PASS
message on the display. Now press ‘INCREMENT KEY’ to enter the correct
password (Enter user’s password if selected or enter factory default
password: 1), after entering the correct password, TUNE/CONF message is
displayed, now press ‘INCREMENT KEY’ to bring calibration mode. Invoking
of Increment key will show CAL message. Now press ‘ENT’, this will bring the
first calibration parameter on display as AMB. (Ambient in case of T/C), in
case of RTD or Linear Input it will show CALZ. (Zero calibration).
 After applying appropriate Input from the calibrator source, press
‘INCREMENT’ OR ‘DECREMENT KEY’ to bring the actual process value on
display.
Example:-
At zero calibration reading expected on the display is 100 and it shows 107, adjust
the process value to 100 by using ‘DECREMENT KEY’. Now press ‘ENT’ to store the
calibration parameter in non-volatile memory. Similarly one can calibrate Ambient,
SPAN and retransmission parameters.
For calibrating i/p, both zero and span are calibrated. Here one-shot calibration
technique is used, i.e. the zero and span are calibrated once. Individual zero or span
can also be calibrated; first calibrate zero and then span. While calibrating
thermocouple type input, first calibrate the ambient (if required) and then continue
with the span calibration of the same.
10.2 Procedure for RET-zero and RET-span
For calibrating the retransmission output, both retransmission zero and
retransmission span has to be calibrated. At a time there can be either one or two
retransmission output available. If only one retransmission is used, then calibrate
rtZ1 (retransmission 1 zero)and rtS1 (retransmission 1 span)and if there are two
retransmission outputs available, then calibrate rtZ2 (retransmission 2 zero)and rtS2
(retransmission 2 span) for second retransmission. No need to feed input while
calibrating retransmission o/p. it is like calibrating using digital trim pot. Only look at
the output, display value has no significance with output generated.
Example:-
At retransmission zero calibration, expected output is 0.00mA and it gives 0.153mA.
Then adjust the output value to 0.153 by using ‘INCREMENT KEY or DECREMENT
KEY’. Now press ‘ENT’ to store the calibration parameter in non-volatile memory.
Similarly one can calibrate retransmission span.

Masibus LC5296-XP Specifications

General

Brand	Masibus
Model	LC5296-XP
Category	Controller
Language	English