Diagnostic Record - GE DigitalFlow DF868 Service Manual

Option Bar Screen Display
CNTdn Counts down
P#up UP +- Peak
P#dn DN +- Peak
NFup UP Norm Factor
NFdn DN Norm Factor
Cxdcr CEE1
TEMPs Supply Temp deg F Displays the temperature for the supply input (energy
TEMPr Return Temp deg F Displays the temperature for the return input (energy
Ts-Tr Supply-Rtn
DENSs Supply Dens
DENSr Return Dens
DELTh Delta h
TW Transmit Wedge

3.3 Diagnostic Record

Upon leaving the Diagnostic Menu via the
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.
DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Service Manual
Table 3: Available Diagnostic Parameters (cont.)
Description
Displays automatic gain control setting for the
downstream signal.
Displays signal peaks for the upstream transducer.
Displays signal peaks for the downstream transducer.
Displays the normalization factor for the upstream
transducer.
Displays the normalization factor for the downstream
transducer.
Displays the speed of sound in the transducer
(clamp-on only).
measurement).
measurement).
Difference between supply input and return input
measurement (energy measurement).
Displays the density for the supply input (energy
management)
Displays the density for the return input (energy
management)
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).
Displays the current adjustment in transit time
measurements due to signal delay in transducers.
[EXIT] key or the
EXIT
option on the option bar, the display screen will
Chapter 3. Diagnostics
Good Bad
N.A. N.A.
100-2300 <100 or
>2300
100-2300 <100 or
>2300
0.85-1.0 <0.85
0.85-1.0 <0.85
N.A. N.A.
N.A. N.A.
N.A. N.A.
N.A. N.A.
N.A. N.A.
N.A. N.A.
N.A. N.A.
N.A. N.A.
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