ຮັບສ່ວນຫຼຸດພິເສດຕາມປະລິມານ, ອັບເດດລາຄາຂາຍສົ່ງ ແລະ ການແຈ້ງເຕືອນສິນຄ້າໃໝ່ສົ່ງກົງເຖິງອິນບັອກຂອງທ່ານ.
ໂດຍການສະໝັກສະມາຊິກ, ທ່ານຍອມຮັບ ເງື່ອນໄຂການໃຫ້ບໍລິການ ແລະ ນະໂຍບາຍຄວາມເປັນສ່ວນຕົວ ຂອງພວກເຮົາ.
ເຂົ້າເຖິງຜູ້ຊ່ຽວຊານທີ່ໄດ້ຮັບການຢັ້ງຢືນຂອງພວກເຮົາໂດຍກົງ
Measurement range
For LF, LS, LT and Lt:
- Upper limit: 137 (A weighting) // 137 (C weighting)
- Lower limit: 27.8 (A weighting) // 29.6 (C weighting)
For Lpeak Linear margin of measurement: 66-140 dB
Noise
- Electrical noise
Maximum: 20.2 (A weighting) // 22.2 (C weighting)
Typical: 14.5 (A weighting) // 16.7 (C weighting)
- Total noise (electrical + thermal microphone)
Maximum: 29.8 (A weighting) // 34.1 (C weighting)
Typical: 25.7 (A weighting) // 29.7 (C weighting)
Peak detector Lpeak
Onset time constant: < 75 µs
Microphone 1/2" condenser microphone with preamplifier incorporated.
- Equivalent impedance: 3000 Ω
- Nominal sensitivity: 16 mV/Pa in reference conditions
Frequency weighting: Complies with standard IEC 61672 class 2. A and C weightings
Time weighting: LF, LS, conforms to class 2 tolerances
Resolution: 0.1 dB
Influence of vibrations: For frequencies from 20 to 1000 Hz and 1 m/s2: <75 dB(A)
Power supply: Two 1.5 V AA (LR6) batteries
Typical duration: 24 h (with continuous use)
Dimensions: 82 mm (W.) x 291 mm (H.) x 20 mm (D.)
Weight: 463 g (with batteries) / 413 g (without batteries)
