How to use Reed SD-4023 Sound Level Meter
To turn the meter off, hold the Power Button for over 2 seconds. The meter’s function defaults are set to “Auto Range, “A Frequency Weighting”, and Fast Time Weighting”. The screen will display “A. Fast Auto”. Switch between “A” or “C” Frequency Weighting by pressing the “A/C Button”. Determine proper measuring range by pressing the Range Button. Press the Range Button to scroll through the Four range types. There are three manual ranges (30 – 80 dB range, 50 – 100 dB range, 80 – 130 dB range) and auto range. Select the Time Weighting (Fast or Slow) by pressing the Time Weighting Button. The screen will display either “FAST” or “SLOW”, depending on your selection.
REED SD-4023 Specifications
- Circuit: Custom microprocessor LSI circuit
- Display: 52mm x 38mm LCD with backlight
- Frequency Weighting: A: Human Ear Listening; C: FLAT Response
- Time Weighting: Fast – 200ms, Slow – 500ms
- Auto Range: 30 – 130dB
- Manual Range: 30 – 80dB, 50 – 100dB, 80 – 130dB
- Frequency: 31.5 – 8,000Hz
- Microphone: Electric Condenser Microphone
- Auto Sampling Time: 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600 seconds
- Memory Card: SD memory card, 1 GB to 16 GB
- Sampling Time: Approx. 1 second
- Data Output: USB/RS232 PC computer interface
- AC Output: AC 0.5 Vrms corresponding to each range step
- Output Impedance 600ohm
- Measurement range: 30 – 130dB
- Resolution: 0.1dB
- Accuracy under 94dB input signal: 31.5Hz ± 3.5 dB, 63 Hz ± 2.5 dB, 125 Hz ± 2.0 dB, 250 Hz ± 1.9 dB, 500 Hz ± 1.9 dB, 1 K Hz ± 1.4 dB, 2 K Hz ± 2.6 dB, 4 K Hz ± 3.6 dB, 8 K Hz ± 5.6 dB,
- Operating Temperature: 0-50°C (0-122°F)
- Operating Humidity: Less than 85% R.H.
- Power Supply: UM3/AA (1.5 V)
- Weight: 489g/1.08lb
- Dimensions: Main instrument: 245 x 68 x 45mm;
- Microphone: 12.7mm (0.5”) Dia.
- Optional accessories: 2G SD Card (SD-2GB) Sound calibrator (SC-05) Wind shield ball (SB-01) USB cable (USB-01) RS232 cable (UPCB-01) Data Acquisition Software (SW-U801-WIN) Soft carrying case (CA-05A) Tripod (BS-6)