Cameron NUFLO MC-III, User Manual

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Section 1 MC-III™ Panel Mount Flow Analyzer
For instructions on installing the interface software and entering configuration parameters via the interface
software, see
Section 4
.
Power Supply
The MC-III Panel Mount is shipped with a lithium battery. Alternately, the MC-III Panel Mount may be
powered by an external power source; in this case, the lithium battery provides a backup power supply,
significantly extending battery service life. Low-power microprocessor technology enables the MC-III Panel
Mount to operate approximately 2 years on a single lithium battery.
External Power Supply. The device will automatically switch to battery power when external power is lost. It
is recommended that the external power supply be an approved ELV source, insulated from the AC main by
double/reinforced insulation per CSA C22.2 No. 61010-1-04 / UL61010-1 – 2nd Edition.
Wiring diagrams for connecting an external power supply are provided in Section 2 .
Multipoint Linearization
The MC-III interface software supports up to 12 calibration points in addition to single-point calibration based
on the K-factor provided with the turbine flow meter. See K-Factor Type, page 59 for more information.
Gas Volume Correction
Gas turbine meters are calibrated in actual cubic feet (ACF), and measure gas in actual cubic feet. In some
applications, a user may benefit from referencing gas measurements back to standard conditions by measuring
in terms of standard cubic feet (SCF). The MC-III Panel Mount makes this process quick and easy, by using
fixed average values for the flowing gas temperature and flowing gas pressure. See Gas Volume Correction
(Supercompressibility Calculation), page 61 for more information.
Input Options
The flow meter signal can be obtained from a magnetic pickup or a pre-amplifier device. The sensitivity of
the flow meter input may be adjusted with the instrument keypad or the interface software. See Section 2 for
wiring diagrams. See
Sections 3
and
4
for configuration procedures.
Output Options
The MC-III Panel Mount standard circuitry provides:
• a scaled pulse output representing an increment in volume for each pulse
• a loop-powered 4-20 mA output representing the flow rate
• a flow meter frequency output for use with remote equipment to derive flow rate and volume
• an RS-485 output for communication with interface software or other telemetry equipment
When the 4-20 mA rate output feature is used, the MC-III Panel Mount is powered by the current loop, and
the lithium battery is used as a backup supply.
The pulse output and 4-20 mA output features should be turned off when not required for reduced current
consumption. See Section 2 for wiring diagrams. See Sections 3 and 4 for configuration procedures.
Flow Log Archival
The MC-III Panel Mount saves up to 384 daily logs and 768 hourly logs in nonvolatile memory. By
connecting with the interface software, users can download the logs for viewing and/or printing in tabular
format or in a trend chart.
Users can also export daily and hourly logs to a spreadsheet. For more information, see
Section 5 .