Cameron NUFLO MC-III, User Manual

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Section 3 MC-III™ Panel Mount Flow Analyzer
Setting Input Type and Sensitivity
The flow meter signal can be obtained from a magnetic pickup or a pre-amplifier device.
The input sensitivity of the MC-III Panel Mount is measured in millivolts (mV) peak-to-peak. This is the
threshold value at which the circuitry responds to a signal. If the input signal is less than this value, the MC-
III Panel Mount will not count the electrical pulses as a valid turbine meter signal. If the input signal is equal
to or greater than this value, the electrical pulses received at the input will be counted. Care must be taken
to ensure that the input sensitivity is high enough to reject any electrical noise on the signal line, but not so
high that flow meter pulses are missed. The input sensitivity of the MC-III Panel Mount may be set to low,
medium, or high when the input will be provided by a turbine flow meter.
If the input will be provided in the form of a pulse from a pre-amplifier or other device (rather than directly
from a turbine flow meter), the “Pulse In” (pulse input) setting in the Input Sensitivity menu should be
selected.
See Section 2 for input wiring diagrams.
To Set Input Type and Sensitivity:
Enter the K-Factor menu. Press K-FACTOR MENU.
K-FACTOR
MENU
Locate the input sensitivity setting. Press ENTER, repeatedly if
necessary, to bypass calibration
factor. “INPUT SENSITIVITY” will
scroll across the bottom display.
SAVE
ENTER
If the input is the turbine meter, select
a sensitivity setting: low, medium, or
high.
If the input is provided by a different
device, such as a pre-amplifier, select
“Pulse in” (for pulse input).
Press UP ARROW to select a
sensitivity setting.
TEST
Select low, medium,
high, or Pulse In
Press ENTER. ”SAVING” will appear
in the bottom display.
SAVE
ENTER