In all honesty if you have forgotten/not used any piece of equipment for some time then I would suggest a refresher course.Every piece of equipment is different although obviously the principles the same.
Have you got a new high frequency machine?If so then ask the manufacturer for instructions on this model.
This is instructions for the Carlton high frequency machine,what I used at college.
Complete consultation
Perform sensitivity,hot/cold test
Remove clients jewellery
Set all dials to Zero
Cleanse skin
Apply oxygenating cream and gauze to area
Place the large head surface electrode in contact with clients skin,then turn equipment on, and apply small circular movements ,slowly turning up intensity to suit clients tolerance.A prickly sensation should be felt,up and down movements are applied to the neck area.
The treatment will vary depending on clients skin but a maximum of 15 mins
To end the high frequency treatment slowly turn the intensity down,turn machine off and remove oudin resonator from area.
Remove gauze and excess cream
Apply mask,tone and moisturise
It is important to maintain contact,so place electrode onto skin BEFORE turning the equipment on.
The client and therapist must NOT touch anything metal during treatment
Do not increase the current beyond the clients tolerance.
All jewellery must be removed
Ensure electrodes are firmly in their holders.
I hope this helps just please remember to always make contact with skin BEFORE switching high frequency on as sparking may occur and this is not good for clients skin,however the dials must be set at zero and gently turned up,or it can be uncomfortable for client.