Adjusting the Pulser Receiver
Part # 910-250C
35
2. Use the function keys for direct access or the [] and [] keys to toggle through the
different waveform rectification modes.
4.4.2 Pulser Energy
The EPOCH 4PLUS has four (4) pulser energy settings depending upon test conditions:
• Low (100 V)
• Medium (200 V)
• High (300 V)
• Max (400 V)
Tip: Generally, the lower pulser energy settings is used for thin materials, while
the higher settings are used for thicker materials and/or highly attenuating
materials.
To select a pulser setting, follow these steps:
1. Press [PULSER] to access the energy level settings.
In the split screen mode, the pulser energy level is highlighted on the lower half of the
screen.
2. Use the function keys for direct access or the [] and [] keys to toggle among the
four selections.
4.4.3 Damping
The damping control lets you optimize the waveform shape for high resolution
measurements via an internal resistive circuit. There are four damping settings:
• 50 ohms
• 63 ohms
•150 ohms
•400 ohms
Tip: Generally, the lowest ohm setting increases the system damping and
improves near surface resolution, while the highest ohm setting decreases
system damping and improves the instrument penetration power.
Selecting the correct damping setting fine tunes the EPOCH 4PLUS to operate with a
particular transducer selection. Depending on the transducer being used, the various
damping settings either improve near surface resolution or improve the instrument’s
penetration power.
To select a damping option, follow these steps:
1. Press [PULSER] to access the damping parameter.
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