Shock pulse measurement
D:17
D
Transducer line quality
Transducer line quality test, TLQ
From the measurement window, the instrument can
be set up to perform a transducer line quality test
(TLQ) before measurement. Press the ENTER key to
enable or disable the TLQ test (1).
When TLQ is enabled, the instrument will display
the result of the transducer line quality test in the
result window, so you can check the quality of signal
transmission between transducer and instrument.
Part of your signal will be lost in a poor transducer
line, so your measuring results will be lower than
they should be.
For shock pulse transducers, the following applies:
•
40000, 42000 type transducers: the result of
the TLQ test is a ‘TLT’ (Transducer Line Test)
value. TLT is dimensionless, with accepted
values between 15 and 25.
•
44000 type transducers: the result of the TLQ
test is a ‘TLR’ (Transducer Line Resistance)
value in kohm (resistance). Accepted values
are between 26 and 40 kΩ.
1
Under ‘Delay time’, you can specify a number of seconds during which Leonova will delay the start
of measurement. This setting is optional.
Acquisition time
The ‘Acquisition time’ is automatically updated when parameters are changed that affect the time.
The TLQ test should always be made when you measure with permanently installed transducers. Normal
TLT/TLR values for transducer types 40000 and 42000 are around 20 and for 44000 approx. 32 kOhm.
For 40000 and 42000 type transducers, TLT values below 15 are not acceptable, so you have to check
cables and connectors for bad connections and moisture.
If the TLQ value is below the accepted level, the measuring result cannot be saved.
Summary of Contents for leonova emerald
Page 1: ...User guide PORTABLE EFFICIENCY ...
Page 2: ......
Page 6: ...A 2 General instrument functions A ...
Page 36: ...B 2 General measurement functions B ...
Page 74: ...C 2 Measurement techniques always included B C ...
Page 88: ...D D 2 Shock pulse measurement ...
Page 122: ...D D 36 Shock pulse measurement ...
Page 124: ...E E 2 Vibration measurement ...
Page 150: ...E E 28 Vibration measurement ...
Page 152: ...F F 2 Rotor balancing ...
Page 170: ...F F 20 Rotor balancing ...