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, Anywhere, Anytime!

COMPACT PORTABLE - Sleek benchtop design measuring just 60 x 130 x 37.5 mm and weighing 400g—take professional calibration anywhere.
RUGGED RELIABILITY - IEC 60942:2018 Class 2 certified with stability even in extreme humidity and temperature conditions for consistent results.
SMART LED INDICATORS - Instant visual feedback with green LEDs for calibration status and red LED for low battery alerts—never miss a beat.
TRIPLE LEVEL PRECISION - Calibrate confidently with 94dB, 104dB, and 114dB sound pressure levels at 1kHz frequency for unmatched accuracy.
ENERGY EFFICIENT AUTO OFF - Auto power-off feature maximizes battery life so your calibrator is always ready when you are.

The GAIN EXPRESS Professional Sound Level Calibrator offers three precise calibration levels (94dB, 104dB, 114dB) at 1kHz frequency, housed in a compact, portable benchtop design. Certified to IEC 60942:2018 Class 2 standards, it ensures reliable accuracy even under extreme environmental conditions. Featuring smart LED indicators and an auto power-off function, this battery-operated calibrator is engineered for professionals demanding precision and convenience on the go.

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Item Weight	480 g
Product Dimensions	960 x 200 x 400 cm; 480 g
Batteries	2 AA batteries required. (included)
Item model number	8930B
Color Name	Sound Level Calibrator
Size	Dimension: 60 x 130 x 37.5mm

GAIN EXPRESS Professional Sound Level Calibrator Decibel Meter Calibrator with Three Calibration Level at 94dB & 104dB & 114dB

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