Fluid Components International CMF Series Manual Electronics Setup and Menus - Manual (Page 15)

Commissioning
Fluid Components Intl
Document 06EN003327 Rev. - 65 FlexCOR
™
Model CMF Series
Service mode
The service mode menu can be used to check the flowmeters operation or as diagnostic tools
for trouble shooting.
Flow rate indicates the actual flow rate in %, while tests are being conducted in SERVICE MODE.
Low flow cut-off can be used to supress fluctuating flow transients while experimenting.
Current output can be used to simulate a given flow, temperature, density signal etc. The feature
can be used to check/calibrate connected equipment. Under current output forced a value
between 0 and 24 mA can be set.
If 3 current outputs are used the function can also be used for identification of the individual outputs
by activating these in turn.
Digital output can also be simulated. If the output is selected as limit functions or batch a high or
low state can be simulated. If the digital output is used as flow, density or temperature output, a
signal of 1 to 12,500 Hz can be simulated.
Relay output is used to simulate the relay as on or off.
Special information is used for making diagnosis of the sensor function under the present
operating conditions. This makes it possible to reveal errors caused by errors in the sensor itself
or errors due to application conditions disturbing the sensor function.
Driver signal indicates the current which is necessary to drive the sensor. The driver current is
dependant of sensor size. In the table below the typical values for normal operation conditions are
displayed. The driver current will increase if there is damping in the application, such as air/gas
bubbles, hydraulic generated noise such as flow pulsations or dampning created by mechanical
noise such as vibrations. The driver output circuit can deliver 36 mA maximum.
Size Driver frq. [Hz] Driver current [mA]
CMF - A 120 12
CMF - B 110 7
CMF - C 135 15
CMF - D 165 15
CMF - E 125 10
CMF - F 125 12
Pick-up 1/2 amplitude indicates the signal level at the two pick-up’s. In normal operation
conditions the level should be greater than 50 mV. A lower value indicates damping in the system
and can be due to air/gas bubbles in the sensor.
The signal on pick-up 1 and 2 should be within the same value ±20 mV. A bigger difference
indicates noise in the system due to hydraulic or mechanical errous conditions.
Sensor frequency gives the resonant frequency of the sensor in Hz. The frequency is dependent
on dimension as well as the density of the liquid measured, see table below. Values more than
±20 Hz away of the values in the table indicate problems, check cabling, connection and operation
conditions.
Sensor temperature gives the actual temperature of the sensor. The function can be used to see
whether possible errors occur because the sensor is exposed to an excessively high temperature.
Futhermore, errors due to missing/wrong connection of the temperature transmitter between
sensor and converter can be detected.
Sensor zero can be used to check whether the zero point of the meter is satisfactory.
Operating time indicates how many days the signal converter has been in operation.
Service mode
Menu description