The monitoring system shall include an internal electrical means to electrically check and maintain calibration without resort to additional equipment. Provision shall also be made to enable calibration with an external acoustic coupler.

Note: Authority cited: Sections 21669, Public Utilities Code. Reference: Sections 21669-21669.4, Public Utilities Code.

History

1. New Note filed 2-20-90; operative 3-22-90 (Register 90, No. 10).