FOLLOW THE MOUNTING INSTRUCTIONS FOR
DISPLAY AND TRANSDUCER BEFORE PROCEEDING:
1. Connect the tran s d u c e r and power wires to the display unit as shown in figure 3.
2. If you choose to connec t night lighting simply connec t your 12 volt D.C. wire as indicate d in
figure 3 and install a SPST switch on the positive (+) line to com plet e the circuit and activate
the lights.
3. To set alar m, turn the left knob on instru m e n t to SET. Next, turn the right knob to desire d
alarm setting. The visual alarm (and DA- 1, if installed) will be activate d when dep t h is at or
below alar m setting.
(Figure 3)
CALIBRATION
GAIN:
The rear GAIN contr ol is a man u al override on the auto m a tic gain control (AGC) and is used to
set the maxim u m gain. It usu ally is factory set to be fully clockwise (maxim u m gain) for the
greate s t sensitivity, however some ti m e s turb ule n c e, ignition or electrical distu r b a n c e, or
spurio u s reflectio n s fro m the keel may make the reading s unst a ble. If this occurs, turn the
GAIN control coun t e r clockwise slightly until the reading s stabilize.
SHALLOW GAIN:
When the tran s d u c e r sen d s out its signal, it can receive a reflection fro m the keel, pilings or
other nearby objects before the reflectio n from the botto m. To elimina te the retu r n s fro m
these unwa n t e d signals, the SHALLOW GAIN mus t be adjus t e d. For best result s start in 10 - 15
feet of water and turn the SHALLOW GAIN clockwise until the reading s are subst a n ti ally less
than the actual dept h. Now turn coun te r clockwise until the readi ng s retu r n to the actu al
dept h. Repeat this proce d u r e while un de r way.
KEEL OFFSET:
The display can be adju s t e d to display dep t h s from surface of the water to bott o m, from the
keel to botto m, or tran s d u c e r to botto m - the unit is factory set for tran s d u c e r to botto m. If
you desire a differe n t set up then meas u r e the water dep t h with a lead line and adjus t the
KEEL OFFSET clockwise for a lower reading (keel to botto m) or coun te r clockwise for a higher
reading (surface to botto m). Each indicat o r repre s e n t s a 1 foot incre m e n t.
