Fisher TW-7700 用户手册

Subject to improvement or modification without notice.

Depth Accuracy ...................... +1 inch per foot in nominal condi-
tions
Readout Units ........................ Inches or cm (factory preset)
Left/Right Guidance ............... Audio: continuous tone=Left,

pulsed tone=Right. VCO (varying pitch) output for easy over

........................................... target location. Visual: Left/Right/
........................................... Over Target messages

Signal Strength ...................... Digital Numeric Readout (0-99%)

                                                        & Bar Graph

Sensitivity Adjust ................... Automatic
LCD Backlight ........................ Included
Battery Test ........................... Automatic Low Battery alert

                                                        Push button readout

Battery Type ........................... Six “C” cells
Battery Life ............................ 80 Hours
Weight ..................................... 5.4 lbs.
Operating Temp ..................... -4

 0

 to +140

0

F (-20

0

 to +60

0

C)

Output Frequency .................. 82kHz,
Output Power (nominal) ........ .5Watts,
Battery Test ........................... Yes
Battery Type ........................... Two 6 Volt lantern batteries
Battery Life ............................ 80 Hours
Weight ..................................... 5.0 lbs.