9 Maintenance
D184B122U02 S4 53
9.8.4 Checking the Metering System
The check of the metering system follows the assembly and installation the flowmeter primary and converter.
STOP
Warning!
When the housing cover is open and the supply power is turned on the personnel contact protection is no
longer provided!
Are the flowmeter primary and converter installed at
the correct location? (is the coordination correct, Tag-
No., Instrument Nos, FRAM, is the FRAM-type tag
identical to the data on the flowmeter primary?). Do
the ambient conditions Protection Class, temperature,
vibration, cables used and cable type comply with the
specifications limits for the instrument?
No Allowable installation requirements: check tempera-
ture, Protection Class, vibration, connections per
Interconnection Diagram (see Page 14). Compare the
Instrument Number on the type tag, coordination
based on the Instrument Numbers (only for designs
with factory entered data). In the high temperature de-
sign insulate the flowmeter primary and the pipeline
(see Flowmeter Primary OM).
Yes
Does the supply power correspond with the value on
the type tag on the converter?
No Provide correct supply power.
Yes
Is the supply power within the limits for the nominal
voltage at the terminals?
Terminals Supply Power (Limits)
L, N, (PE) AC 100–230 V (-15%/+10%)
1+,2-,(PE) AC 20.4-26.4 V (-15%/+30%)
DC 20.4-31.2 V
1)
(-15%/+10%)
No Provide correct supply power.
Yes
Is the supply power frequency within the limits
50/60 Hz ± 6% ?
No Provide correct supply power frequency.
Yes
Were the flowmeter primary and converter earthed
correctly?
No Check the earth connections per the Interconnection
Diagram. See Page 14
Yes
Is the flowmeter primary filled with fluid? No Fill pipeline.
Yes
Turn on supply power. With flow, does the actual flow
direction agree with the flow direction indicators → F
for forward, ← R for reverse? Does the flowrate indi-
cation agree with the actual flowrate in percent or di-
rect reading units?
No 1) Check if the flow direction indicators in the display
agree with the actual flow direction.
2) Is the conductivity too low? Check.
Yes
Is the operating mode Standard selected for
continuous flowrate metering ? For pulsating flows is
the operating mode Piston Pump selected?
No Enter parameter Operating Mode Standard or
Operating Mode Piston Pump.
Yes
Does the meter size in the submenu Primary agree
with the size on the type tag on the flowmeter primary?
No Incorrect FRAM in converter, the meter size can only be
entered for older model flowmeter primaries.
Yes
Have the flow range, current output, pulse factor,
pulse width etc. been entered?
No Enter units and flow range. Enter the current output
range and the pulse values.
Yes
Does the actual flowrate correspond to the display
and output values?
2)
No Initiate function test, check converter with flowmeter
primary simulator.
Yes
Metering system operational. The entry settings can
also be recorded on the Overview Sheet on the last
page.
1) Ripple ≤ 5%
2) If the flow direction does not agree with the flow
direction indicators in the display, the flow direction in-
dicators should be changed. In the submenu Operating
Mode call the parameter Flow Direction and change to
Inverse or Standard as required.
To Next Page
Loading...
