Schonstedt Instrument GA-92 XT, Инструкция по эксплуатации

Страница: 5 / 19

- 5 -
On-Off and Volume Knob: To turn the unit ON pull the on/off button up. To turn OFF, push it down.
The volume of the unit can be increased by turning the knob clockwise.
Gain Knob:
The sensitivity of the unit can be increased (to detect smaller objects at greater depths) by
adjusting the gain. The gain is increased by rotating the knob clockwise.
Gain Indicator: The gain range is indicated on the GA-92XT locator by a 4-segment LCD at each quarter
turn as L (Low), M (Medium), H (High) and XH (Extra High). The "Gain" of the unit is continuous, and
therefore the sensitivity will increase as the knob is rotated. The indicator gives the operator a general idea
of the currently selected range of sensitivity.
Battery Level Indicator:
The GA-92XT locator displays the current battery level with a 4-segment LCD
indicator. As shown in Figure 4, when all four segments are black the voltage level is between 100% and
25% (up to 24 hours of operation with intermittent usage). As the voltage decreases, the number of black
segments decreases. Battery life varies with usage and the ambient temperature. Cold temperatures reduce
battery life. Low temperatures may result in only two or three segments being black. This could be
temporary and all segments will change back to black as the temperature increases.
100 to 75% 75 to 50% 50 to 25% 25 or less
Figure 4. Battery Voltage Status Indications
Headphone Jack:
The headphone jack is located on the side of the unit near the face of the locator. The
unit does not come with headphones, but they may be purchased from Schonstedt as an accessory. For
optimum performance, we recommend using the headphones offered by Schonstedt Instruments. The
headphone jack is monaural, and therefore although standard stereo headphones can be used, they will
produce sound in only one ear.
When the headphones are plugged in, the sound will decrease to a faint buzzing. The volume knob will
also control the volume of the headphones.
Search Procedure
Set the GAIN control for
L and grasp the locator as illustrated. Because the
upper sensor is near the locator's handle, wristwatches may produce unwanted
changes in the audio signal and in the meter indications, and should be
removed. Keep the locator away from your shoes since they might contain
magnetic material. To obtain maximum area coverage, sweep the locator from
side to side. When the locator comes within range of an iron object, the audio
signal will peak and in the XTd model the bar graph will expand in the positive
or negative direction as shown in Figure 6.
Figure 5. Searching With the Locator