Delta OHM HD2024 Operating Manual

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V1.0 TABLE OF CONTENTS 1 INTRODUCTION .................................................................................................... 3 2 DESCRIPTION ....................................................................................................... 4 3 CALIBRATION PROCEDURE ................................................................................... 5 3.1 CORRECTION DEPENDING ON THE TYPE OF MICROPHONE ..................... ...

V1.0 1 INTRODUCTION The HD2024 sound level calibrator is a portable, battery operated sound source, suitable for sound level meters (portable and laboratory) and acoustic stations. It allows calibrating 1/2” (1/4” with HD2020MA adapter) microphones with mechanical dimensions compliant with IEC 61094-1 (“Measurement microphones. Part 1: Specifications for laboratory standard microphones”) and IEC 61094-4 (“Measurement microphones ...

V1.0 2 DESCRIPTION 1. ON-OFF key: turns on and off the instrument. 2. LED indicating the calibrator status. 3. Calibrator cavity for 1/2” microphones. 4. LOW BATT LED: indicates that the battery is low and needs to be replaced. 5. Battery lid. ...

V1.0 3 CALIBRATION PROCEDURE The HD2024 can calibrate standard 1/2” (and 1/4” with HD2020MA adapter) micro- phones compliant with IEC 61094-1 and IEC61094-2. To calibrate the microphone, insert it deep into the cavity. The O-ring will offer some resistance. The calibrator can be held in vertical position or placed on a flat surface. While measuring, you should move neither the microphone nor the calibrator; make sure that the worktable ...

V1.0 4 BATTERY The calibrator is provided with a 9 V alkaline battery that can be replaced by the user. The battery charge is constantly monitored. 4.1 LOW BATTERY INDICATION If the battery is charged, the LOW BATT LED is off. If the battery charge is insufficient to ensure the normal operation of the instrument, the LOW BATT LED lights up. 4.2 BATTERY REPLACEMENT To replace the 9 V battery: • Switch off the instrument. • Open the lid ...

V1.0 5 CONSTRUCTION AND FUNCTIONING Calibrator mechanical construction (section) The figure schematizes the HD2024 calibrator structure (in section). The battery com- partment is on the right side of the case. The printed circuits with the electronics are over and under the battery compartment. The electro-acoustic transduction system is on the left and it consists of a wide cavity with a piezoceramic generator and a feed- back sensor. The ...

V1.0 6 TECHNICAL SPECIFICATIONS The HD2024 calibrator complies with IEC 60942-2003 Class 1 and ANSI S1.40- 1984. Coupling cavity For standard ½” (12.7 ± 0.03 mm) microphones according to IEC 61094-1 and IEC 61094-4 Optional adapter HD2020MA for ¼” microphones Frequency 1000 Hz Frequency tolerance 1% in the range -10 ÷ +50 °C and 10 ÷ 90%RH Sound pressure level 94.0 dB ± 0.3 dB at 1 kHz (referred to 101.3 kPa, 23 °C ± 3 °C and ...

V1.0 7 INSTRUMENT STORAGE Instrument storage conditions: • Temperature: -25...+55 °C. • Humidity: less than 90 %RH no condensation. • In storage, avoid places where: • humidity is high; • the instrument is exposed to direct sun radiation; • the instrument is exposed to a high temperature source; • high vibration levels are present; • the instrument may be exposed to vapor, salt and/or corrosive gas. The housing of the inst ...

V1.0 9 ORDERING CODES HD2024 Acoustic calibrator. Supplied with: 9 V alkaline battery and instruction manual. HD2020MA Microphone adapter for 1/4” capsules. DELTA OHM metrology laboratories LAT N° 124 are ISO/IEC 17025 accredited by ACCREDIA for Temperature, Humidity, Pressure, Photometry / Radiometry, Acous- tics and Air Velocity. They can supply calibration certificates for the accredited quantities. ...

All DELTA OHM instruments are subject to accurate testing, and are guaranteed for 24 months from the date of purchase. DELTA OHM will repair or replace free of charge the parts that, within the warranty period, shall be deemed non efficient according to its own judgement. Complete replacement is excluded and no damage claims are accepted. The DELTA OHM guarantee only covers instrument repair. The guarantee is void in case of in ...

Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | [email protected] The quality level of our instruments is the result of the constant development of the product. This may produce some differences between the information written in this manual and the instrument you have purchased. We cannot completely exclude the poss ...

Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | [email protected] V1.0 04/06/2018 ...