Solartron Metrology Ametek OD2, Инструкция пользователя

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15
Part No. 501107 Issue 13
6. CALIBRATION
6.1 CALIBRATION WITH STANDARD SOLARTRON TRANSDUCERS
6.1.1 4-20mA Transmitter
Move the transducer to the 4mA end of its required travel and adjust the Zero control to give 4mA.
If 4mA cannot be obtained, rotate the Span control clockwise until it can.
Move the transducer to the 20mA end of its required travel and adjust the Span control to give
20mA. If the output stays at 4mA or falls, again the transducer white and green connections are
probably reversed. It will prove necessary to adjust the Zero and Span controls more than once to
achieve a satisfactory stroke range.
6.1.2 0-20mA Transmitter
Move the transducer to the 0mA end of its required travel and adjust the Zero control to give 0mA
on an indicator. The control should be set for just 0mA since the current cannot go negative and a
wide range of Zero control may produce 0mA. It may be necessary to slightly adjust the Span con -
trol clockwise, in association with Zero control, in order to achieve 0mA if the transducer is being
operated over a small range at one end of its travel.
Move the transducer to the 20mA end of its required travel and adjust the Span control to give
20mA. If the current stays at 0mA, try reversing the white and green transducer connections. It
may prove necessary to adjust the Zero and Span controls more than once to achieve a satisfac -
tory stroke range.