Datasheet EM273 (Primo) - 6

PRIMO COMPANY LIMITED Jan. 10, 2025 (ver.6)
Handling Instructions for Electret Condenser Microphones
Please pay attention to the following items when handling Primo's electret condenser microphones (ECM's). 　 １．Transportation and Storage The optimum microphone transportation and storage condition is below: (applies to all units that have been externally pre-tinned) ・Temperature & Humidity ----- 0℃～+40℃ with less than 70% RH. ・Electro-static -------------------- e - lectro-static free environment, charges shall not occur. ・Condensation -------------------- c - ondensation free environment, moisture build up shall not occur. ・Piling products ------------------ D - o not stack products on top of each other to avoid the shock of falling. ・Term ------------------------------- L -- ess than 3 months If storing over 3 months, you must check for oxidation or corrosion of the solder terminals. ※ Avoid transportation and storage in environments where ECM's are exposed to direct sunlight, significant vibration and shock, liquids, hazardous gases, and excessive dust. ２．Assembly Process There is a risk of performance degradation by electro-static discharge damage, because the ECM has an internal FET. The microphone parts have been precision machined and if the microphone is exposed to excessive heat, performance degradation may occur. Please refer to the recommendations below, ・ A dust free environment. ・ A controlled temperature-humidity environment that is equal to the storage condition. ・ Do not mechanically stress microphones with more than 10N force during the assembly process. ・ An electro-static free environment, make sure no charges could occur. 　　　 Us 　 e countermeasures of electro-static discharge to the table, equipment, jigs, tools and workers. Do not use the easily electrically charged packing materials, jigs, tools and cloth. ・ During the soldering process, if excessive heat comes in contact with the main microphone body, it may cause a change in sensitivity, effect the noise level, malfunction, etc… When soldering, it's important to use a heat sink fixture at all times. Refer to the recommended solder temperature, heating times and solder equipment (the capacitor of the heater) for each microphone size in the table below. ・ During the soldering process of pin type microphone, if excessive stress (horizontal force) on the microphone pin, it may cause a distruction of pin root. Please pay your attention in the case of soldering pin type microphone. ・ In case of soldering to the microphone which has some sound holes on the PCB, there is a risk of performance degradation by dropping the soldering ball into the inside of microphone through the sound hole. By way of prevention for this risk, if you solder this microphone type, we recommend to use the sound hole covering fixture. (Please see the sound hole covering fixture.) ・ Do not solder more than two times on each soldering pad. ・Please avoid processes such as blowing air towards the microphone sound hole or sucking it up using a vacuum, as this may damage/deform the diaphragm. 1 / 4