3M 2550 Manuale Utente

78-9000-0192-2 Rev C 

19

F. Selecting External Jack Frequencies (Tone Frequencies)

Menu/OK [5:Toggle to MAIN MENU] + >>More [SK:4] + 

 [SK:5] + >>More [SK:d] + 

>>More [SK:h] + Tone/Freq [SK:k]

A coupler can be plugged into the External Jack 

[15] ([14] on 2550 locator) of the receiver and 

used to identify 50 Hz or 60 Hz cables. (See 19. 

Additional Applications: B: Cable Identification.) 

The same procedure as above (Section 5D) is 

followed for selecting frequencies that can be 

detected by the External Jack [15] ([14] on 2550 

locator) found on the bottom of the receiver.

G. Creating User Defined Frequencies

Menu/OK [5:Toggle to MAIN MENU] + >>More [SK:4] + 

 [SK:5] + >>More [SK:d] + 

Locate Freq [SK:f]

There are four user defined frequencies available on the receiver. (These frequencies 

must be between 50 Hz and 999 Hz.) These frequencies are found in the column on the 

far right of the Locate Freq display (Auxiliary frequencies). These frequencies, once 

programmed, will appear under the Aux [SK] frequency list when Freq [SK] is selected 

in the Locate mode.

To program the user defined frequencies press the 

right arrow [SK] to highlight the Auxiliary group 

of frequencies. Press the up/down arrows [SK] 

to highlight the user frequency to program. Press 

Enabl/Disabl [SK].

Press the left/right arrows [SK] to move the square 

cursor to a digit. Press Select [SK] to enter the 

number in the frequency field.
Press Menu/OK [5] to save the programmed 

frequency, or press Exit [SK] to cancel. The 

frequency will appear in the locate frequency display 

as U###, where ### represents the programmed 

frequency.
Note: To redefine a previously programmed user