User manual

16
Section 1 MC-III™ EXP Flow Analyzer
Important: The USB communications adapter is approved by CSA for use in hazardous areas. The
CSA-approved model is Part No. 2295524-01. The adapter kit, which includes an installa-
tion CD, is Part No. 2295634-01.
RS-485 IS Barrier (CSA-Approved Units Only)
The RS-485 output of a CSA-approved MC-III is approved for intrinsically safe installations. An intrinsically
safe barrier assembly with a conduit seal enables the RS-485 output to be used as an intrinsically safe output.
In such installations, only the turbine owmeter input may be used. See Figure 2.18, page 34, for an IS barrier
assembly wiring diagram.
Commonly Used Functions
While the functions of the MC-III EXP are too numerous to mention, some of the most commonly used
functions are detailed in this section. They include:
• reading the rate and accumulated total
• saving totals to memory
• resetting the total
• viewing daily and hourly logs
• saving and uploading conguration les
• exporting log data to spreadsheet
• saving log data in a report
Reading Totals
Current totals can be viewed from the LCD on the front of the MC-III EXP or from the interface software
(MC-III Main screen). The software calculates the ow total and updates the LCD display every 4 seconds, by
default. The user can adjust the calculation period with the interface software. See Calculation Period, page 65,
for more information.
Saving Totals to Memory
Hourly and daily totals are automatically saved to nonvolatile memory. A user may save an accumulated total
at any time by opening the enclosure and pressing ENTER (SAVE) on the keypad. In the event of a power
failure, the last saved total will be displayed on the LCD when power is restored. See also Explosion-Proof
Reset/Control Switch, page 15.
Note: Always save the accumulated total before replacing batteries.
Resetting the Total
Totals can be reset to zero using the keypad, the interface software, an explosion-proof switch mounted in the
top of the enclosure (if equipped), or a pulse from an external device.
• To reset the total with the keypad, press LEFT ARROW (LOG) and ENTER (SAVE) keys simultaneously.
• To reset the total with the interface software, double-click the NuFlo MC-III icon on the computer desk-
top and wait for the software to connect to the instrument; then select MC-III Main from the Device
Autorun Options screen, and click on the “Reset Flow Total” button in the lower right corner of the Main
screen.