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GUARANTEE 

 

 

 

GUARANTEE CONDITIONS   

All  DELTA  OHM  instruments  have  been  subjected  to  strict  tests  and  are  guaranteed  for  24  months  from 
date of purchase. DELTA OHM will repair or replace free of charge any parts which it considers to be inef-
ficient within the guarantee period. Complete replacement is excluded and no request of damages are rec-
ognized. The guarantee does not include accidental breakages due to transport, neglect, incorrect use, in-
correct connection to voltage different from the contemplated for the instrument. Furthermore the guaran-
tee  is not valid  if the  instrument has been repaired or tampered by unauthorized third parties. The instru-
ment  has  to  be  sent  to  the  retailer  without  transport  charge.  For  all  disputes  the  competent  court  is  the 
Court of Padua.  

 

The  electric  and  electronic  devices  with  the  following  symbol  cannot  be  disposed  in  the  public 
dumps. According to the Directive UE 2002/96/EC, the European users of electric and electronic 
devices are allowed to give back to the Distributor or Manufacturer the used device at the time of 
purchasing a  new one. The illegal disposing of electric and  electronic devices is punished  by  a 
pecuniary administrative penalty. 

This guarantee must be sent together with the instrument to our service centre.  

N.B.: Guarantee is valid only if coupon has been correctly filled in all details. 

Instrument type  

 

HD 2020 

Serial number

 

 

 

RENEWALS 

 

 

 

 

 

Date 

 

Date 

Inspector 

 

Inspector 

Date 

 

Date 

Inspector 

 

Inspector 

Date 

 

Date 

Inspector 

 

Inspector 

 

C E   C O N F O R M I T Y  

Safety 

EN61010-1  

Electromagnetic compatibility. Immunity general standard 

EN61000-6-2:2005 

Electromagnetic compatibility. Emission general standard 

EN61000-6-3:2007 

Electrostatic Discharge Immunity 

EN61000-4-2 level 3 

Susceptibility to electromagnetic interference 

EN61000-4-3 level 3 

Immunity to electrical fast transients 

EN61000-4-4 level 3 

Immunity to conducted disturbances 

EN61000-4-6 

Electromagnetic Interference - Conducted Emissions 

EN55022:2007 class B 

Electromagnetic Interference - Irradiated Emissions  

IEC/CISPR 22 class B 

 

 

 

Summary of Contents for HD 2020

Page 1: ...on written in this manual and the instrument that you have purchased We cannot entirely exclude errors in the manual for which we apologize Data figures and descriptions contained in this manual cannot be legally asserted We reserve the right to make changes and corrections without prior notice REV 1 1 15th June 2012 HD 2020 ENGLISH ...

Page 2: ...he standard screen 3 Display When you turn the instrument on it shows all segments on then the sound pressure level 94 or 114dB will appear in standard view 4 Calibrator cavity for 1 2 inch microphones 5 key in standard mode it selects 94dB and 114dB pressure levels alternately In menu mode it de creases the current value 6 key in standard mode it selects 94dB and 114dB pressure levels alternately...

Page 3: ...st Le misure effettuate presso un Laboratorio di Taratura Accredia sono garantite da una catena di riferibilità ininterrotta che ha origine dalla taratura dei campioni di prima linea del Laboratorio presso l istituto metrologico nazionale Measurements performed in an Accredia Calibration Laboratory are guaranteed by a uninter rupted reference chain which source is the calibration of the Laboratory...

Page 4: ... is inserted the instrument switches off 5 minutes after turning on provided that you don t press any key The calibrator display shows calibration pressure level battery life current date and time The internal clock allows to set up the validity period of calibration expressed in years and months starting from the date of adjustment as soon as the time interval has elapsed a blinking symbol alerts...

Page 5: ... after about 5 minutes if the microphone is inserted in the cavity and you don t press any key If the cavity is open the sound level blinks on the display in this case the instrument switches off automati cally after 30 seconds You cannot disable the AutoPowerOff function SETUP Key The SETUP key allows entering and viewing the menu To exit press the SETUP key until you go back to the standard scre...

Page 6: ...rent time Use the arrow keys to increase decrease the value Press the SETUP key to confirm and go to the current minute Use the arrow keys to increase decrease the value Press the SETUP key to confirm and go to the current second Whenever you press the arrow keys seconds will be reduced to zero Press the SETUP key to confirm and go to calibration section of the menu the first triangle on the left ...

Page 7: ...s entered by the calibration laboratory and the expiry date When the time interval expires the triangle blinks to remind you that the calibrator needs a new ad justment years of validity second triangle Use the arrow keys to increase decrease the value Confirm with SETUP key and go on to the number of va lidity months months of validity second triangle Use the arrow keys to increase decrease the v...

Page 8: ... and the calibrator off switch on the sound level meter and detect the unweighted ambient sound pressure level If the measured level is below 78 dB you can use both calibration sound levels 94 dB and 114 dB if the level is between 78 dB and 98 dB you can use the 114 dB level only while a sound level above 98 dB means that calibration is not possible Press the ON OFF key to switch on the instrument...

Page 9: ...ibrator nominal one Microphones optimized for diffuse field measurements don t require corrections when calibrated in a closed cavity at 1 kHz instead LOW BATTERY INDICATION AND REPLACEMENT The HD 2020 calibrator is provided with two batteries a 9V alkaline battery that can be replaced by the user and a lithium buffer battery The latter allows the date indicator and watch to work even without exte...

Page 10: ...the battery compartment The display and the keypad take up the higher part The electro acoustic transduction device is on the left and it consists of a wide cavity with a piezoceramic generator and a feedback sensor The device emits the signal through the microphone An outer capillary hole balances the chamber static pressure protecting microphones from overpressure due to their insertion Control ...

Page 11: ...erated by the piezoelectric transducer through automatic gain control The signal provided by the sensor slightly varies with the ambient temperature and the static pressure the frequency of the signal provided by the oscillator is also stable in relation to ambient parameters INSTRUMENT STORAGE Instrument storage conditions Temperature 25 55 C Humidity below 90 RH without condensation When storing...

Page 12: ...al functioning and operating safety are guaranteed only if climatic conditions are the same as described in the specifications chapter Use and store the instrument avoiding Sudden change of the ambient temperature that may cause condensation Inflammable or corrosive gases Direct vibration or blows Intense electromagnetic fields static electricity If you carry the instrument from a cold to a hot en...

Page 13: ... 10 C 50 C and 10 90 RH Static pressure influence 0 1 dB in the range 65 kPa 108 kPa Stability levels Short term stability 0 03 dB Stability after 1 year normal use 0 1 dB Operating conditions Working temperature 10 50 C Relative humidity 90 R H Storage temperature 25 70 C Microphone equivalent volume 5 to 250 mm 3 Power supply 9V alkaline battery IEC type 6LR61 9V rechargeable batteries are also ...

Page 14: ... 14 ORDERING CODE HD2020 The kit includes HD2020 calibrator one 9V alkaline battery instruction manual and I SO 9001 calibration report ...

Page 15: ...N 4 DISPLAY AND KEYPAD DESCRIPTION 5 CALIBRATION PROCEDURE 8 LOW BATTERY INDICATION AND REPLACEMENT 9 CONSTRUCTION AND FUNCTIONING 10 INSTRUMENT STORAGE 11 FUNCTIONING AND OPERATING SAFETY 12 SPECIFICATIONS 13 ORDERING CODE 14 ...

Page 16: ...he European users of electric and electronic devices are allowed to give back to the Distributor or Manufacturer the used device at the time of purchasing a new one The illegal disposing of electric and electronic devices is punished by a pecuniary administrative penalty This guarantee must be sent together with the instrument to our service centre N B Guarantee is valid only if coupon has been co...

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