Ground Verification 
 
The rack monitor will verify the impedance between pin 9 and 10 (including ground bolt) or if a clamp (model 7720) 
is used between the two jaws or the two pins of or ground plug Model 7620.  
Ground verification is set if the impedance is within the set boundaries. 
The Top bar will flash white for ½ Sec. on and off. 
Sleep Mode 
 
The rack monitor will enter sleep mode when there is nothing detected for 30 minutes. The Top light bar will be off. 
The bottom light bar will light up Red with an intensity of 50% for 3 Sec. then 10% for 27 Sec. 
 
Heartbeat 
 
A Blue light will appear at the Top Bar to indicate that the rack monitor is running, this will only appear when there 
are no other flash patterns.