Candela GentleYAG, Operator'S Manual

Page: 68 / 160

GentleYAG Laser System Candela Corporation
8501-00-1766 Revision F CONFIDENTIAL Page 68
The DCD Post Spray Adjust parameter adjusts the duration of the cryogen spray
applied to the patient after the laser pulse. The DCD Post Spray can be turned off
(“O”) or set to duration between 10 and 50 milliseconds, in increments of 10
milliseconds.
When the DCD Pre or Post Spray Adjust parameters are changed, the canister counter
is updated to reflect the change.
The Canister Counter is a decrement counter that keeps track of the number of
cryogen spray pulses contained within a canister. The count decrements with each
pulse of the laser if the DCD is in the “ON” state. When the count reaches zero, the
message “REPLACE CANISTER” appears and the canister must be replaced. Use of
a canister after the counter reaches zero may result in inadequate canister pressure,
and therefore, inadequate cryogen spray. Any residual cryogen left in the canister is
there as a margin of safety for both you and your client. Instructions for replacing the
canister are shipped with each canister. Install only new, full cryogen canisters.
Installation of a partially used canister will cause the canister count to be incorrect.
Once the new canister is installed, the canister counter must be reset. This is done by
holding the canister counter button down for several seconds until a new count
appears. The canister counter is updated when sp ray duration is changed, and with
each pulse of cryogen including purges. Canister counts for each of the combined Pre
and Post Spray durations are shown in tables 3.9 and 3.10.
Canister Counter/
Reset
DCD Post Spray