Turning On

To turn on the Tel-x-ometer, plug it into an outlet.  On the left side of the face you will notice there is a switch that can be set to 20kV or 30kV, turn the switch up so it is set to 30kV.  Make sure that the GM tube is pointing towards the x-ray tube and close the lid of the Tel-x-ometer.  When closed properly, the lid will allow the x-rays to be produced and when the lid is displaced the x-rays will stop being produced.  After ensuring the lid is on properly, turn the key and the power will be on (the white light should light up).  The last step is to push the red button on the side of the Tel-x-ometer and this will allow the x-rays to begin producing (the red light should light up).  For best results, it is recommended to let the filament light up for around 5 minutes (it is normal if there is condensation on the lid while heating up) and then to turn on the x-rays.

The counter should be plugged into a power source.  A BNC cable should be connecting the GM Tube to the counter.  The voltage from the counter to the GM Tube should be around 360V and the current, using an ammeter, should read 0.50 microamps.