Dynisco IPX II Series, Руководство по эксплуатации

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COMMISSIONING
Press the NEXT NEXT NEXT NEXT NEXT key to proceed to the next menu selection, TRIM 4 MA TRIM 4 MA TRIM 4 MA TRIM 4 MA TRIM 4 MA.
7.2.2 7.2.2 7.2.2 7.2.2 7.2.2
K K
K K K
T TT TT
RIM RIM
RIM RIM RIM
4 4 4 4 4
M M
M M M
A A A A A
The next function of the IPX II Series Smart Pressure Transmitter is TRIM 4 MA TRIM 4 MA TRIM 4 MA TRIM 4 MA TRIM 4 MA..... This allows trimming
of the 4 mA output current. The display will sequence as follows:
This function is only for the purpose of adjusting the 4 mA limit of the IPX II Series Smart
Pressure Transmitter loop current to be exactly 4 mA according to the plant’s local
standard. This is NOT for the purpose of ranging the transmitter!
The 4 mA limit is factory calibrated to a precision standard. Do not arbitrarily trim the output unless
a qualified and accurate local standard is available to measure the adjusted 4 mA output! Also note
that the 4 mA limit should not be trimmed by more than about + 50 µA, or the transmitter operation
may be impaired.
If trimming the 4 mA limit is still required press the ENTER ENTER ENTER ENTER ENTER key. The IPX II Series Pressure
Transmitter will now output a current equal to its internally set 4 mA current. This 4 mA value should
be read on an external meter and compared to a local standard. It is advisable to use a well
calibrated voltmeter to make these comparisons. It is very possible that the IPX II Series transmitter
will be more accurate than many voltmeters. In this case, trimming will make the IPX II Series Smart
Pressure Transmitter less accurate rather than more accurate!
Once TRIM 4 MA TRIM 4 MA
TRIM 4 MA TRIM 4 MA
TRIM 4 MA has been selected, the display will alternate as follows:
By pressing the NEXT NEXT
NEXT NEXT
NEXT key the display then changes to and alternates: