GE B20 User Manual page 120

Entropy equipment to patient connection
(1) Module with Entropy measurement capability
(2) GE Entropy sensor cable
(3) GE Entropy sensor, or
(4) Entropy sensor
NOTE: A portion of the Entropy software is derived from the RSA Data
Security, Inc. MD5 Message-Digest Algorithm.
NOTE: Entropy sensors are latex and PVC free, disposable and for
single-patient use only.
NOTE: For a comprehensive list of accessories, see the "Supplies and
Accessories" catalog.
116
Entropy module keys
There are two keys on the module:
Entropy
Opens or closes the Entropy menu on the
screen
Check Starts the manual sensor check
Sensor