Hello, the equipment came with a certificated paper of conformity or similar? Thanks

My unit did not include any form of certification. Hope this helps.

I am not interested in a Cert of conformity, does the unit come with a calibration certificate?

Hi, the unit doesn't come with calibration certificate, we can do the calibration certificate if you need but with extra cost. Please send email to us if you need to do the calibration certificate, we will quote you the price.

Hi at what distance from which point of the device should SPL be measured?

As noted, the level produced depends the VOLUME of the calibrator CHAMBER, hence how well the microphone fits into it. There is a small "stop" at the base of each microphone adapter. With just the microphone adapter in place and no microphone, it's very soft even close to your ear. 1. Insert the microphone to the point that it stops 2. Turn on the calibrator to the required level, 94 dB is the more common 3. Set the meter to "A" weighting 3. Adjust your meter as appropriate 4. Repeat for the second level and with both "A" and "C" weighting if the meter has both. Make notes of any differences for future reference.

On the digital sound level meter calibrator nd9 is there any way i can get a users manual emailed to me?

Hi, please find the quick user guide from the link below. LINK: https://www.cd50.net/wp-content/uploads/2022/01/ND9_E.pdf

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🎧 Calibrate like a pro, wherever sound matters!

SMART LED INDICATORS - Instant visual feedback with green for ready & calibration levels, red for low battery—never miss a beat.
ROBUST USER FRIENDLY - 13.2mm cavity ensures perfect mic alignment, preventing damage and guaranteeing consistent calibration.
COMPACT PORTABLE DESIGN - Lightweight 400g benchtop calibrator fits perfectly in your toolkit for on-the-go professionals.
BATTERY EFFICIENT OPERATION - Auto power-off extends battery life, powered by included AA batteries for hassle-free use anywhere.
TRIPLE LEVEL PRECISION CALIBRATION - Ensure flawless sound meter accuracy at 94dB, 104dB, and 114dB with 1kHz frequency.

The Professional Sound Level Calibrator offers precise, three-level calibration at 94dB, 104dB, and 114dB with a 1kHz frequency. Its compact 13.2mm cavity fits most microphones securely, while smart LED indicators provide clear status updates. Lightweight and battery-powered with auto power-off, this benchtop calibrator is designed for reliable, portable sound meter accuracy.

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Manufacturer	Gain Express Holdings Ltd
Part Number	8930B
Item Weight	1.06 pounds
Product Dimensions	377.95 x 78.74 x 157.48 inches
Item model number	8930B
Batteries	2 AA batteries required. (included)
Is Discontinued By Manufacturer	No
Size	Dimension: 60 x 130 x 37.5mm
Color	114db / 94db / 104db Calibrator
Item Package Quantity	1
Special Features	Calibration frequency at 1K Hz with three level 114dB, 94dB and 104dB, Vivid LED display with stability and low power indicator
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline

Professional Sound Level Calibrator Decibel Meter Calibration with Three Calibration Level at 94dB & 104dB & 114dB, SPL Meter Calibrator for dB Noise meter

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