DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Service Manual
23
Chapter 3. Diagnostics
3.3 Diagnostic Record
Upon leaving the
Diagnostic Menu
via the
[EXIT]
key or the
EXIT
option on the option bar, the display screen will
continue to show the last diagnostic parameter that was selected. To return to normal measurement mode, select a
channel to display (for a 2-Channel meter only) and then select the desired display parameter. See Chapter 3,
Operation
, of the
Startup Guide
for detailed instructions.
The values for the diagnostic parameters immediately after initial installation of the meter and verification of proper
operation should be entered in Table 7 on page 39
These values can then be compared to future values to help diagnose
any future malfunction of the system.
CNTdn
Counts down
Displays automatic gain control setting for the
downstream signal.
N.A.
N.A.
P#up
UP +- Peak
Displays signal peaks for the upstream transducer.
100-2300
<100 or
>2300
P#dn
DN +- Peak
Displays signal peaks for the downstream transducer.
100-2300
<100 or
>2300
NFup
UP Norm Factor
Displays the normalization factor for the upstream
transducer.
0.85-1.0
<0.85
NFdn
DN Norm Factor
Displays the normalization factor for the downstream
transducer.
0.85-1.0
<0.85
Cxdcr
CEE1
Displays the speed of sound in the transducer
(clamp-on only).
N.A.
N.A.
TEMPs
Supply Temp deg F Displays the temperature for the supply input (energy
measurement).
N.A.
N.A.
TEMPr
Return Temp deg F Displays the temperature for the return input (energy
measurement).
N.A.
N.A.
Ts-Tr
Supply-Rtn
Difference between supply input and return input
measurement (energy measurement).
N.A.
N.A.
DENSs
Supply Dens
Displays the density for the supply input (energy
management)
N.A.
N.A.
DENSr
Return Dens
Displays the density for the return input (energy
management)
N.A.
N.A.
DELTh
Delta h
Displays the delta enthalpy, which is the difference
between the supply and return. Enthalpy is a measure
of energy contained in the fluid (energy measurement).
N.A.
N.A.
TW
Transmit Wedge
Displays the current adjustment in transit time
measurements due to signal delay in transducers.
N.A.
N.A.
Table 3: Available Diagnostic Parameters (cont.)
Option Bar
Screen Display
Description
Good
Bad
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