87V MAX 
Users Manual 
6 
Table 3. Pushbuttons (cont.) 
Button Switch Position  Function 
 
(Relative 
mode) 
Any switch 
position 
Stores the present reading as a reference for subsequent readings. The display is 
zeroed, and the stored reading is subtracted from all subsequent readings. 
 
Any switch 
position except 
diode test 
Press  for frequency measurements. 
Starts the frequency counter. 
Press again to enter duty cycle mode. 
1.800.561.8187info@Fluke-Direct.ca
Fluke-Direct.ca