Jis Dac - Olympus EPOCH 650 User Manual

DMTA-10055-01EN, Rev. A, February 2015
11.2.4

JIS DAC

The Japanese Industrial Standard (JIS) DAC mode meets the requirements of JIS
Z3060. The JIS DAC curve setup is identical to the standard DAC/TCG setup.
However, any of the six curves can be used to trip the alarm when in the JIS DAC
mode. Additionally, you can set the alarm to positive or negative.
To select the curve to be used as the alarm reference level
1. Activate the JIS DAC and then choose DAC/TCG > Next DAC.
The selected curve appears as a double thickness line.
2. Activate an alarm and set it to either a positive or negative threshold detection.
11.2.5 Custom DAC Curves
The DAC/TCG software option for the EPOCH 650 ultrasonic flaw detector features a
DAC curve setup that allows you to define up to six additional reference curves from
the primary curve at varying levels from –24 dB to +24 dB. The Custom DAC Curves
option is ideal for unique sizing inspections and procedure development. Custom
DAC Curves also allow the option of either a straight-line connection or a curved,
polynomial connection of each point on the DAC curve to meet various international
or customer-specific requirements.
To activate and set up the customized curves
1. Open the DAC/TCG setup page by choosing DAC/TCG > Setup.
2. Press Custom (P5 key) to set the DAC/TCG Mode to custom.
3. Select a Curve Type of Curve or Straight (polynomial or straight-line segments).
4. Select the No Of Curves to be used in addition to the main curve (see Figure 11-12
on page 239).
5. For each warning curve, choose Curve <1–6> dB, and set the value compared to
the main curve.
6. Press to return to the live screen to begin capturing DAC points.
238 Chapter 11