BTU-300 OWNERS MANUAL Thank you for purchasing the Boston BTU-300 digital micro clip chromatic tuner with sound generator. Before you begin using your new tuner, please read this manual carefully and use the tuner as directed. After you have read the manual, keep it in a safe place for future reference. - CAUTION Do not open the casing for any reason as this may cause short circuit or malfunction of the product. Do not apply excessive force to the product. In the event of the product suffering breakage, be careful not to damage yourself with the broken pieces. Do not put in any liquid nor foreign object. Keep unit away from dust, extreme temperatures and humidity. When the unit is not in use for a long period of time, remove the battery to prevent leakage. This Boston digital chromatic tuner has been constructed using state of the art technology. The circuitry has been tested for reliability by our staff of qualiﬁed technicians under performance conditions. Simple care and maintenance will provide long life. This unit is powered by a CR2032(3V) lithium battery. When the back light of the LCD or LED indicator light becomes weak in colour, replace the battery in order to achieve the best tuning results. NAME OF CONTROLS 5. To change calibration (reference pitch), press CALIB (7). Reference pitch can be varied within the range of 430Hz to 450Hz with 1Hz step of increment. Keeping the button pressed causes automatic increment (reference A4 = 440Hz). Result is indicated at position D. 6. When a single note is being played on an instrument, its pitch notation is shown at position E. Set the instrument so that a notation requiring tuning is indicated. The meter needle at position F becomes actuated along with an indication of a notation. When sound is high pitched or low pitched, the LED on the assist indicator (8) lights up in red. Just tuning is obtained when the LED turns to green and the needle at position F with the central position 0 Cnet. SOUND TUNING tuning by means of sounding a reference tone) 1. Turn on the power and select chromatic (C), guitar (G) or bass guitar (B) mode with the MODE button (4). The result is indicated at position A and cannot be changed after setting the sound mode. 2. Select the sound mode by pressing the TUNER/SOUND button (2). The buzzer will make a reference tone. In chromatic mode (C), select a tuning scale with the KEY button (5) and the result is indicated at position C. Four kinds of scales, namely C, B, E and F major scales can be selected. Usually the C major scale is used for tuning guitar etc. Guitar (G) and bass guitar (B) are set on the C-scale. This cannot be changed. 3. To change calibration (reference pitch), press CALIB (7). The pitch can be incremented 1 Hz step at a time within the range of 430Hz to 450Hz. It can be increased automatically by holding down the button. The result is indicated at location D. Reference A4=440Hz. 4. To raise the reference tone produced by the tuner, press the FLAT (6) button. To lower the reference tone, press MODE (4). Select a note requiring tuning and set your instrument to the oscillated tone. CAUTION Be sure to dismount the unit from the instrument after tunings is ﬁnished to avoid the threat of damaging the instrument. 1: 2: 3: 4: 5: 6: 7: 8: 9: power switch (ON/OFF) tuner/sound selector button (TUNER SOUND) vibration sensor/microphone selector switch (VIB/MIC) mode button (MODE), key note (NOTE) down key button (KEY) ﬂat button (FLAT), key note (NOTE) up calibration button (CALIB) assist indicator microphone (MIC) OPERATING PROCEDURE Press the Power switch button (1) to turn on the power. A previous tuner setting of the tuner will appear. To turn off the power, press the button again. Otherwise, the power will be turned off automatically 3 minutes later if the powered unit has been left unattended. METER TUNING 1. To select either vibration tuning or microphone tuning, set the VIB/MIC switch (3) to VIB (down) or MIC (up). The vibration sensor provides tunings with no inﬂuence of surrounding noise. 2. Select chromatic (C), guitar (G) or bass guitar (B) mode by pressing the mode button. The selected mode is indicated at position A. 3. In the case of chromatic tuning (C), select a tuning scale with the KEY button (5). The result of this selection is indicated at position C. Four kinds of scales (namely C, B, E en F major scales can be selected. Usually the C major scale is used for tuning guitar etc. Guitar (G) and bass guitar (B) are set on the C scale. It cannot be changed. 4. Set the standard tuning or a lower note tuning with the FLAT button (6). Each time pressing the FLAT button, semitone= , two semitones=, tree semitones=, four semitones= are sequentially indicated at the B position. Absence of any -indication shows the standard tuning. BATTERY REPLACEMENT The LCD display becomes dark as battery life deceases. Cut the power supply and replace the button battery CR2032 with a new one. Pay attention not to confuse its polarities. When the unit is not used for a long period, remove the battery. SPECIFICATIONS Power source Automatic power OFF : button battery CR2032 (3V) 1 piece : Power is cut off after the unit is left unattended for about 3 minutes Display : Backlight LCD display Tuning : 12 note equal-tempered Measuring range : A0 (27.5Hz)~C8 (4186.01Hz) Measurement accuracy : +-1 cent Calibration range : A4=430Hz~450Hz, 1Hz step Tuning scale : C major, B major, E major, F major scales Assist indicator : 1LED, in tune = green, / #=red Sound detection : Vibration sensor, built-in microphone Dimensions tuner body : 57*35*14mm Weight : approx. 41g (including battery) mark for European standards This is to certify that the chromatic tuner fully conforms to the protection requirements of the following EC Council Directives on the approximation of the laws of the member states relating to: 89/336/EEC, 9368EEC, EN55022, EN61000-6-1, EN61000-6-3. *** appearance and speciﬁcations are subject to change without notice for improvement – E&OE ***