1. EPOCH 1000 Series Procedure Conventional Straight Beam Calibration

2. Required Items Transducer Test Block Cable A109S-RM Couplant
2214E (5-step in)
Cable
BCM-74-6
Couplant
D-12

3. Initial Settings Basic Menu Pulser Menu Receiver Menu
Velocity in/µs (long. wave in steel)
Range – in
Pulser Menu
PRF Mode- Auto Low
Energy- 100V
Damping- 50 Ω
Mode- P/E (pulse-echo)
Pulser- Square
Freq- 5MHz
Receiver Menu
Filter Group- Standard
Filter
Rectification- Full

4. Zero Calibration Set the Gain to 6.0dB
.500
.400
.300
.200
.100
Set the Gain to 6.0dB
Couple the transducer to the in step
Set Gate 1 so that it surrounds the first backwall echo from the in step
Use Auto-XX to adjust the gain so that the signal is at 80%

5. Zero Calibration (cont.)
Press the Auto CAL key to bring up the Calibration menu
Make sure the CAL Mode is set to Thickness
*(If more than just Gate 1 is active you will have other options for CAL Mode)
Press [P3] for CAL Zero
Enter in the dialog box
Press the Check key to continue on to the Velocity calibration

6. Velocity Calibration Couple the transducer to the 0.500 in step
.400
.300
.200
.100
Couple the transducer to the in step
Set Gate 1 so that it surrounds the first backwall echo from the in step
Use Auto-XX to adjust the gain so that the signal is at 80%

7. Velocity Calibration (cont.)
Press [P2] for CAL Velocity
Enter in the dialog box
Use the right arrow to scroll to Calculate and then press the Check key to complete the calibration
*If you are ONLY doing a velocity calibration, press Check to continue
Adjust the Range back to the starting value of in

8. Calibration Complete!
Verify that your unit is properly calibrated by checking the thickness measurement at each step on the block.
NOTE: Make sure to move the gate so it surrounds the first backwall echo for each step you are on.