TC.voiceworks中文说明书

HARMONY SINGER 2Battery-Powered Vocal Effects Stompbox with Guitar-Controlled Harmony, Reverb and ToneUser Manual2Harmony Singer 2 User ManualLEGAL DISCLAIMER LIMITED WARRANTY Terminals marked with this symbol carryelectrical current of suffi cient magnitudeto constitute risk of electric shock.Use only high-quality professional speaker cables with¼" TS or twist-locking plugs pre-installed. All otherinstallation or modifi cation should be performed onlyby qualifi ed personnel.This symbol, wherever it appears,alerts you to the presence of uninsulateddangerous voltage inside theenclosure - voltage that may be suffi cient to constitute a risk of shock.This symbol, wherever it appears,alerts you to important operating andmaintenance instructions in the accompanying literature. Please read the manual.CautionTo reduce the risk of electric shock, do notremove the top cover (or the rear section).No user serviceable parts inside. Refer servicing toqualifi ed personnel.CautionTo reduce the risk of fi re or electric shock,do not expose this appliance to rain andmoisture. The apparatus shall not be exposed to drippingor splashing liquids and no objects fi lled with liquids, such as vases, shall be placed on the apparatus.CautionThese service instructions are for useby qualifi ed service personnel only.To reduce the risk of electric shock do not perform anyservicing other than that contained in the operationinstructions. Repairs have to be performed by qualifi edservice personnel.1. Read these instructions.2. Keep these instructions.3. Heed all warnings.4. Follow all instructions.5. Do not use this apparatus near water.6. Clean only with dry cloth.7. Do not block any ventilation openings. Install inaccordance with the manufacturer’s instructions.8. Do not install near any heat sources such asradiators, heat registers, stoves, or other apparatus(including amplifi ers) that produce heat.9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fi t into your outlet, consult an electrician for replacement of the obsolete outlet.10.Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,and the point where they exit from the e only attachments/accessories specifi ed by the e only with the cart, stand, tripod, bracket, or table specifi ed by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.13.Unplug this apparatus during lightning storms or when unused for long periods of time. 14.Refer all servicing to qualifi ed service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.15.The apparatus shall be connected to a MAINS socket outlet with a protective earthing connection.16.Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.17.Correct disposal of this product: This symbol indicates that this product must not be disposed of with household waste, according to the WEEE Directive (2012/19/EU) and your national law. This product should be taken to a collection center licensed for the recycling of waste electrical and electronic equipment (EEE). The mishandling of this type of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the effi cient use of natural resources. For more information about where you can take your waste equipment for recycling, please contact your local city offi ce, or your household waste collection service.18.Do not install in a confi ned space, such as a book case or similar unit.19.Do not place naked fl ame sources, such as lighted candles, on the apparatus.20.Please keep the environmental aspects of battery disposal in mind. Batteries must be disposed-of at a battery collection e this apparatus in tropical and/or moderate climates.MUSIC Group accepts no liability for any loss which may be suff ered by any person who relies either wholly or in part upon any description, photograph, or statement contained herein. Technical specifi cations, appearances and other information are subject to change without notice. All trademarks are the property of their respective owners. MIDAS, KLARK TEKNIK, LAB GRUPPEN, LAKE, TANNOY, TURBOSOUND, TC ELECTRONIC, TC HELICON, BEHRINGER, BUGERA and DDA are trademarks or registered trademarks of MUSIC Group IP Ltd. © MUSIC Group IP Ltd. 2016 All rights reserved.For the applicable warranty terms and conditions and additional information regarding MUSIC Group’s Limited Warranty, please see complete details online at/warranty.3Harmony Singer 2 User Manual1.Controls(5)(4)(8)(6)(7)(1)HARMONY knob selects the harmonies that will be blended with your voice.See Chapter 2: Using the Harmony Knob for details.(2)LEVEL knob adjusts the volume of the harmonies.(3)REVERB knob selects the type and amount of reverb effect on your voice.The 3 types of reverb appear in order from the smallest space (Room) to the largest (Hall). Adjusting the knob within your preferred reverb space determines how pronounced the effect will be. Turning the knob fully counterclockwise turns the reverb off.(4)BATTERY LED indicates the battery level, with green showing full life,yellow being partial life, and red to alert that the batteries should be changed.(5)TONE button engages a preset combination of adaptive EQ, compression,de-essing, and noise gate. “Normal ” and “Less Bright ” settings can be toggled by holding the Tone button and pressing the footswitch.(6)ON/OFF LED lights when the effect is engaged.(7)FOOTSWITCH bypasses the harmony effect,but does not affect the reverb or Tone status. (8)USB input accepts a micro USB cable for connection to a computer. Use the VoiceSupport application to install firmware updates, and for other features depending on your product.Download VoiceSupport from /products/voicesupport/(9)ON/OFF switch powers the pedal on and off. (10) POWER input accepts a 9V power cable (not included).(11) OUT jack accepts a balanced XLR cable for connection to a mixer or active speaker. (12) MIC input jack accepts a balanced XLR cable to connect your microphone.4Harmony Singer 2 User Manual 2.OperationConnection5Harmony Singer 2 User Manual•Connect a microphone to the MIC jack•Connect the OUT jack to a mixer, interface or active speaker •Connect a guitar to the Guitar Input jack on the right side of the pedal •Connect the left Guitar Output jack to an amplifier or mixing console Optional:•Connect a micro USB cable to a computer•Connect power cable•Using the Harmony KnobThe Harmony knob selects a single harmony voice or combination of voices higher or lower in pitch than your voice. The chart below shows name and pitch intervals for each position on the Harmony knob.Guitar InputConnect any guitar pedals between Harmony Singer’s Guitar Output jack and the input of your amp. Connecting and activating some guitar pedals before the Guitar Input jack may adversely affect vocal harmony production.Tips:• Strumming chords works better than single note playing for harmony control• When changing chords, ensure that the root and 3rd of each new chord are played clearly• To harmonize correctly from the first chord of a song,briefly play the first chord before singing Momentary ModeThe standard function of the footswitch is a latching style, meaning that each press of the footswitch turns the harmony on and off. Alternatively, the pedal can operate in momentary mode, meaning that the harmony is only active while the footswitch is held down. As soon as you release the footswitch,the harmony is bypassed.To switch the unit to momentary mode, hold the Tone button down while powering the unit on. Repeat the process to return to latching mode. Changing the BatteriesHarmony Singer 2 can operate on 4 AA batteries. Remove the single screw on the bottom of the pedal to open the battery door. Make sure to observe correct polarity when inserting the batteries.Auto GainHarmony Singer 2 will automatically adjust the gain setting for your microphone, eliminating the need for manual adjustments and ensuring that a good signal is passed to the mixer without any unwanted distortion.24 V Phantom PowerPhantom power is always active on the Harmony Singer 2. This will power condenser microphones, but will not affect dynamic mics either.Mic ControlMic Control allows you to control the effect's on/off status via anMP-75 microphone. Press and hold the footswitch while powering up the unit to toggle Mic Control.Note that when using a condenser microphone, Mic Control should be disabled to prevent unwanted on/off switching.6Harmony Singer 2 User Manual3.SpecificationsMic Input Impedance: Balanced: 2.68 kOhmMic Input Level @ 0 dBFS: -42 dBu to +1 dBuEIN @ Max Mic Gain Rg = 150 Ohm: -126 dBuMic input SNR: >104 dBGuitar Input impedance: 1 MOhmGuitar Input Level @ 0 dBFS: -7 dBU to 17 dBuGuitar Input SNR: >115 dBOutput Impedance, Bal./Unbal.: 200/100 OhmOutput Full Scale: +1 dBuDynamic Range: >104 dB, 20 Hz to 20 kHzFrequency Response: +0/-0.3 dB, 20 Hz to 20 kHzPower Supply (Optional): 9 V / 670 mAPower Consumption: 6 WOperating Temperature: 32° F to 122° F (0° C to 50° C)Storage Temperature: -22° F to 167° F (-30° C to 70° C)Humidity Max.: 90 % non-condensingDimensions: 5.4" x 3.5" x 2.3" (140 x 90 x 60 mm) Weight: 0.92 lb. (420 g)For the applicable warranty terms and conditions and additional information regarding MUSIC Group’s Limited Warranty, please see complete detailsonline at /warranty.Due to continuous development, these specifications are subject to change without notice7Harmony Singer 2 User Manual。

LogiTALKERVoice KeyerOWNER’S MANUALIdiom PressPO Box 1015, Merlin, OR 97532-1015 USA ● +1 541-956-1297PrefaceThank you for purchasing our LogiTALKER, a stand-alone voice keyer for your radio.To put the keyer in service you will need at least two cables. One cable goes from the “Mic Out” RJ45 modular connector on the rear of the LogiTALKER to the microphone input of your radio. Cables are available from Idiom Press for connecting the LogiTALKER to radios with round 8-pin mic connectors or RJ45 modular connectors.The second cable will be a 2.1 mm inner diameter, 5.5 mm outer diameter DC coaxial power plug to a 12–14 VDC regulated power supply. The center pin is positive, the shell is negative. Caution: Do NOT use typical wall-wart “12 volt DC” supplies. These supplies often put out unfiltered pulsating DC, and frequently at voltages that can spike in excess of 15 volts, which can severely damage your LogiTALKER and void the warranty. Only use a regulated and well-filtered supply. Note that many transceivers have 12-volt outputs for auxiliary equipment – this is a good source. The 12 VDC or 13.8 VDC supply that powers your radio is also a good source.Set-UpYou must configure the LogiTALKER to match your radio microphone and other operating parameters such as Beep on/off and Delay values. Refer to Figures 1-4 on the following pages as a guide to setting these jumpers.An explanation of how the microphone configuration header JP1 works is in order. The left row of pins is for inputs, and for now let’s consider only that row of pins, and ignore the right row of pins. The pins labeled 1-8 are connected directly to the microphone input jacks’ pins 1-8, and the pins labeled “MIC”,“MIC-G”, “PTT”, and “PTT-G” are where the LogiTALKER gets the microphone, microphone ground, Push to Talk, and Push to Talk Ground input signals. You must use jumpers to connect “MIC”, “MIC-G”, “PTT”, and “PTT-G” to the correct microphone input jack pins.Similarly, the right row of pins in JP1 is for outputs. Pins 1-8 are connected directly to the microphone output jack. Pins 9-12 have the output signals from the LogiTALKER, which you must connect to the correct output pins using jumpers.Any JP1 pins 1-8 in the left row that aren’t connected to LogiTALKER input pins should be connected straight across to the corresponding pins of the right row. In that way, microphone functions that have nothing to do with the LogiTALKER, such as “UP” and “DOWN” buttons, continue to work normally.The jumper configuration of the right row of pins of JP1 should be the mirror image of the jumper configuration of the left row of pins.In this way, the LogiTALKER can be configured for just about any dynamic, condenser, or electret microphone that has an eight-pin modular plug. With the modular-to-Foster output cable, available separately from Idiom Press, the LogiTALKER can similarly be configured for just about any microphone that has an eight-pin Foster plug.If for any reason you find it necessary to work out the configuration of a particular microphone by yourself, then it is essential to keep in mind that not all radio manufacturers use the same standard of which pin is defined as pin 1 for modular plugs. If the manufacturer of the radio numbers the pinsdifferently, then you must take that fact into account when calculating how to wire the jumpers in the LogiTALKER. See Figure 5.JP1Radio ModelJP212345678 IC-703, 706, 7000J1291011J J J On Icom718, 725, 735, 746, 756, 7200, 7600, 7700, 78009J J J111210J OnTS-50, 570, 850, 870, 2000911J J J J1012Off KenwoodTS-480J J1011129J J Off Elecraft K3911J J J J1012Off Ten-Tec Omni VII, Orion II J J J J1211109Off FT-450, 817, 857, 897J1211910J J J Off YaesuFT-847, 920, 950, 2000J J J J1211109Off Flex-Radio FLEX-1500, FLEX-3000J1211910J J J Off “J” indicates a pass-thru jumper straight across JP1. In the table, 9 refers to “MIC”, 10 refers to “MIC G”, 11 to “PTT”, and 12 to “PTT G”.Function JP3JP4Beep On1-2-Beep Off2-3-Delay Range: 24-266 Seconds-1-2Delay Range: 2-25 Seconds-2-3Figure 3 - PC Board LayoutFigure 4Setup(Continued)Remove the LogiTALKER cover by removing the two screws oneach side and lift the cover off. Locate your radio in Figure 1 and Figure 4 and use the suppliedjumper wires for configuring the mic wiring on JP1. JP1 is a dual 12-pin header located at the far left of the PC board. Starting with pin 1, place the wire connector over the pin and push it all the way down. Place the other end of the wire over the appropriate pin on the same header or opposite header if it is a pass-thru jumper, and push it all the way down. Continue until all 12 wires have been installed. (Note that the wire colors shown in Figure 4 do not correspond to the actual jumper wire colors.)If your radio is not listed in Figure 1, please contact Idiom Press for assistance. However, if youknow the radio microphone wiring pinout you may be able to determine the jumpers from the following:o Elecraft mic pins labeled Up, Down, Function, and +8V or +5V are pass-thru signals andare jumpered straight across JP1 using the listed pin numbers.o Icom mic pins labeled Up/Down, Squelch, +8V, and Audio Out are pass-thru signals andare jumpered straight across JP1 using the listed pin numbers.o Kenwood mic pins labeled Up, Down, +8V, and N/C are pass-thru signals and arejumpered straight across JP1 using the listed pin numbers.o Ten-Tec mic pins labeled NC, and +10V are pass-thru signals and are jumpered straightacross JP1 using the listed pin numbers.o Yaesu mic pins labeled Up, Down, +5V, and Fast are pass-thru signals and are jumperedstraight across JP1 using the listed pin numbers.Pins labeled Mic, Mic ground, PTT, and PTT ground are the signals used in the LogiTALKER . Jumper these pins to the corresponding pin labels (shown on the PC board Figure 3), and duplicate the jumpers on the both sides of JP1.Use the supplied jumper shorting block for configuring the mic bias voltage on JP2. Microphonebias voltages are required for all electret or condenser mics. Dynamic mics do not require a bias voltage. Place the shorting block across pins 1-2 to enable mic bias or across pins 2-3 to disable mic bias. Use the supplied jumper shorting block for configuring the beep enable on JP3 (see Figure 2 and3). Place the shorting block across pins 1-2 to enable the beep or across pins 2-3 to disable the beep.Figure 5Use the supplied jumper shorting block for configuring the message delay range on JP4 (see Figure 2 and 3). Place the shorting block across pins 1-2 for delays of 24-266 seconds or across pins 2-3 for delays of 2-25 seconds.While the cover is off, check the keyer’s audio output level and the setting of trimpot R24.Connect your 12VDC power supply cable to the keyer and the mic cable from the keyer to the radio. Connect a dummy load to your radio’s RF output.Set the LogiTALKER controls as follows:•Volume to 1/2 which applies power and lights the green LED•Transmit Level to 1/2•Delay fully CCW to Off•Mode pushbutton to Record•Transmit pushbutton to OffPress and hold the Message-1 pushbutton, speak a test message into the microphone, and then release the pushbutton when finished. On most radios the microphone PTT switch does not need to be pressed, and should not be pressed, to record a message. A single beep (if enabled) will signal the start and end of a successful recording. If two beeps are heard before releasing the pushbutton the recording time has been exceeded and the message should be recorded again.Next, set the Mode switch to Play and Transmit pushbutton to OnPress and release the Message-1 pushbutton and adjust the Volume control for a comfortable level. (Adjust the distance to the microphone or speaking volume if the audio is distorted or weak and re-record the message). Play Message-1 and adjust the Transmit Level control to match the modulation level observed on a live microphone signal. Adjust trimpot R24 if the final Transmit Level setting is near the beginning or end of its range.When all jumpers and adjustments have been made and you are satisfied with the operation of the LogiTALKER and radio, re-install the cover and screws. Congratulations, set-up is complete!OperationYou are now ready to record all of your messages. Note that this may be done without connecting the LogiTALKER to your radio. The final step is to connect your radio to an antenna and check the quality of the transmitted audio during a QSO and make any refinements as needed. Make a note of the final control settings for future use.For contests, many users set Message-1 as a CQ message and reserve Messages 2-4 for common reports such as grid square, QTH, equipment, etc. If a response to your CQ is heard between intervals press the microphone PTT switch (suspending the Message-1 auto repeat) and begin transmitting. At the conclusion of the QSO press the Message-1 pushbutton to resume the repeating loop.Press Message-1 and adjust the Delay for an interval of approximately 2-25 seconds (or 24-266 seconds) between messages. Press the microphone PTT switch at any time to halt playback of all messages andstop the Message-1 repeat. Resume the auto repeat by pressing Message-1. Messages 2-4 do not have auto repeat and will play one time for each press of the pushbutton. The Message-1 auto repeat may also be switched off by turning the Delay control fully CCW. If a message is playing and its respective pushbutton is pressed the message will stop. If a message is playing and a different message pushbutton is pressed the keyer will beep, stop playback of the first message, and then play the new message after a short delay.One warning: you will not be able to record messages with the LogiTALKER connected to a radio, and the radio powered off. In that case you can either turn the radio on and record messages, or disconnect the LogiTALKER from the radio and record messages.ModificationsThere are several modifications that the user can perform to customize the LogiTALKER. Refer to the schematic diagram at the end of this manual.•More speaker volume – Add a 10µF/25V electrolytic capacitor (C26) and series 0-1.2K resistor (R26) from U3 pin 8 to pin 1. The lower the value of R26 the higher the maximum volume.•Headphones – Add a headphone jack on the rear of the LogiTALKER using the available signals on J6. Speaker outputs are on pins 1-2.•External Power Amplifier – Add an external power amplifier using the available audio and voltage pins on J6. Low level audio signals are on pins 4-5 and 12VDC is available on pin 3.•Computer Messaging Control – Add the ability to control message playback from your computer’s parallel port using the available pins on J7. Momentarily grounding pins 1-4 will playback messages 1-4.•Change the Message-1 repeat delay range. Place shorting block across pins 1-2 on JP4 and replace C24 with a value of your choice. As shipped, C23=220µF and C24=2200µF.Delay min = R min x (C23 + C24)R min= R11 = 10 kΩDelay min = (10 x 103) x (220 x 10-6 + 2200 x 10-6) = 24 secondsDelay max = R max x (C23 + C24)R max = R27 + R11 = 100 kΩ + 10 kΩ = 110 kΩDelay max = (110 x 103) x (220 x 10-6 + 2200 x 10-6) = 266 seconds1.Mic In - Connects your radio microphone’s round 8-pin connector to the LogiTALKER.2.Mic In - Connects your radio microphone’s modular RJ45 connector to the LogiTALKER.3.Active - Red LED flashes to indicate the LogiTALKER is playing or recording a message.4.Power - Green LED indicates the LogiTALKER is powered on.5.Volume - Switches LogiTALKER power on/off and controls the volume of the internal amplifier andspeaker.6.Transmit Level - Sets the audio output level to your radio.7.Delay - Sets the amount of delay time between repeats for Message 1. Delays times are configured byjumper JP4. Turn completely CCW to turn delay off.8.Record/Play - Locking pushbutton, “In” to record messages, “Out” to play messages.9.Transmit On/Off – Locking pushbutton; “In” keys the radio during message recording or playback,“Out” to prevent keying the radio during message recording or playback.10.Message 1 - Momentary pushbutton, a momentary press plays Message-1. If Delay is turned on itwill start the Message-1 repeat delay cycle.11.Message 2 - Momentary pushbutton, a momentary press plays Message-2.12.Message 3 - Momentary pushbutton, a momentary press plays Message-3.13.Message 4 - Momentary pushbutton, a momentary press plays Message-4.1.Internal speaker for monitoring message playback.2.2/4 Messages - Locking pushbutton, selects between 2 or 4 messages. “In” selects 4 message modeand “Out” selects 2 message mode. Messages must be recorded with this switch in the desired position. Changing switch positions after messages have been recorded will result in incorrect playback pitch of the recorded message.3.+12 VDC - 2.5mm x 5.5mm input jack for LogiTALKER 12 VDC power.4.Mic Out - Connects the output of the LogiTALKER to the microphone input of your radio using theappropriate adapter cable.SpecificationsOverall Dimensions (excluding cables) 1.75" H x 7.375" W x 4" DWeight14 oz.DC Power requirements 13.8 VDC nominal < 200mA ( reverse polarity protected)2 Message Mode:Sampling Frequency8.0 kHzInput Bandwidth 4.0 kHzMessage Length16 seconds per message 4 Message Mode:Sampling Frequency 6.4 kHzInput Bandwidth 3.2 kHzMessage Length10 seconds per message Microphone Input Voltage30mV peak-to-peak, maximum PTT contact rating 2 A @ 30 VDC, maximumFeatures• 2 or 4 Messages•Built-in audio amplifier and speaker•Message pushbuttons•Audible beep prompts•Play/Record switch & LED•Transmit On/Off switch•Uses the radio microphone•Record and play messages without a radio connection•Transformer isolated audio output with level control and automatic PTT switching•Message-1 repeat with 2-25 or 24-266 second delay interval with on/off control•Suitable for any radio with appropriate RJ45 adapter cables for the radioWarrantyYour LogiTALKER is warranted against defects in material and workmanship for 90 days from the date of purchase from Idiom Press or from an authorized Idiom Press dealer.This warranty does not cover damage or failure caused by or attributable to Acts of God (such as nearby lightning strikes), abuse, misuse, improper or abnormal usage, improper configuration, faulty construction, use of acid core or water soluble resin solders in construction, faulty installation, improper maintenance, application of excessive voltage, or improper construction or repair.Idiom Press is not responsible or liable in any way for direct, indirect, special or consequential damages arising out of or in connection with the use or performance of the product or other damages with respect to loss of property, loss of revenues or profit, or costs of removal, installation or reinstallation.Except as provided herein, Idiom Press makes no express warranties, and any implied warranty of merchantability or fitness for a particular purpose is limited in its duration to the duration of the written limited warranties set forth herein.Always contact Idiom Press at *******************before returning a unit! For repair, warranty or otherwise, contact Idiom press for instructions. Always include a letter carefully describing the problem. If the unit was purchased from a dealer, include a copy of your sales receipt.Idiom PressPO Box 1015Merlin OR 97532-1015USA+1 (541) 956-1297。

Register your product and get support at /welcome1 X transformador certificado Nome da marca: PHILIPS, Modelo n.º: OH-1018A0602400U-BZ, Entrada: 100-240 V~50/60 Hz 650mA Saída: 6V 2,4A 6V/2.4A A placa de sinalética encontra-se na parte inferior do aparelho.© 2010 Koninklijke Philips Electronics N.V .All rights reserved.DS1100_78_UM_V1.0Quando a ficha de ALIMENTAÇÃO ou o dispositivo de ligação de um aparelho forem utilizados como dispositivo de desactivação, o dispositivo de desactivação deve estar pronto para ser utilizado de imediato. GBENGLISH Important safety instructionsa Read these instructions.b Keep these instructions.c Heed all warnings.d Follow all instructions.e Do not use this apparatus near water.f Clean only with dry cloth.g Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.h Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.i Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.j Only use attachments/accessories specified by the manufacturer. k Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. l Unplug this apparatus during lightning storms or when unused for long periods of time. m Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.n Apparatus shall not be exposed to dripping or splashing.o Do not place any sources of danger on the apparatus (e.g. liquid filled objects, lighted candles).。