Fluke Biomedical 07-453 - Manual (Page 18)

Appendix
APPENDIX
X-RAY WAVEFORMS
This section has been added to the manual to assist users of the Fluke Biomedical Model 07-453 Pulse
Counter / Exposure Time Meter. Understanding the material in this section will enable the user to obtain
the correct exposure time for any x-ray.
HALF-WAVE – This is typical of practically all dental x-rays and most podiatry x-rays.
Switch the Model 07-453 to PULSE. The instrument will count and display the number of pulses. To
convert to time (in seconds), refer to the Exposure Time Conversion Chart or use the formula Time =
pulses / 60 (in countries with 60 Hz power). As shown, the 07-453 would count 6 pulses, and the
exposure time would be 6/60 = 0.1 second.
FULL-WAVE – This is typical of some older hospital x-rays.
Switch the Model 07-453 to PULSE. The instrument will count and display the number of pulses. To
convert to time (in seconds), refer to the Exposure Time Conversion Chart or use the formula Time =
pulses / 120 (in countries with 60 Hz power). As shown, the 07-453 would count 12 pulses, and the
exposure time would be 12/120 = 0.1 second.