🇨🇿 EKOLA group, spol. s r.o. PL

ČIA 2416 • Praha 10, Czech Republic • 19 calibration items

Metrology & calibration

EKOLA group, spol. s r.o. is a calibration laboratory accredited by ČIA under number 2416 (Praha 10, Czech Republic). Its accreditation scope covers 19 calibration items in the following areas: Metrology & calibration. Calibrated items include: C-weighted peak sound level / Sound analyzers, Effective bandwidth deviation / Fractional-octave-band filters, Frequency and time weightings at 1 kHz / Sound analyzers, Frequency response in octave bands / 1/2‘‘ measurement microphones. Most frequently used calibration principles: Simulated electrical signal, Calculation based on sound analyzer measurement, Comparative method acc. to the nominal sensitivity of the standard….

At a glance

Accreditation number: ČIA 2416
Calibration items in scope: 19
Types of calibrated items: 19
Calibration principles used: 8
City: Praha 10, Czech Republic
Valid until: 07-02-2030

Accreditation number: 2416
Accreditation body: ČIA
Address: Mistrovská 7, 108 00 Praha 10
City: Praha 10, Czech Republic
Division: Laboratorium wzorcujące EKOLA group
Valid until: 07-02-2030

What this laboratory calibrates (19)

C-weighted peak sound level / Sound analyzers — 1 calibration item
Effective bandwidth deviation / Fractional-octave-band filters — 1 calibration item
Frequency and time weightings at 1 kHz / Sound analyzers — 1 calibration item
Frequency response in octave bands / 1/2‘‘ measurement microphones — 1 calibration item
Frequency weightings by acoustic signals / Sound analyzers — 1 calibration item
Frequency weightings by electric signals / Sound analyzers — 1 calibration item
High-level stability / Sound analyzers — 1 calibration item
Level linearity on the reference level range / Sound analyzers — 1 calibration item
Linear operating range, dynamic measurement range, overload indication / Fractional-octave-band filters — 1 calibration item
Long-term stability / Sound analyzers — 1 calibration item
Measurement of relative attenuation / Fractional-octave-band filters — 1 calibration item
Open-circuit sensitivity / 1/2‘‘ measurement microphones — 1 calibration item
Overload indication / Sound analyzers — 1 calibration item
Relative attenuation at midband frequency / Fractional-octave-band filters — 1 calibration item
Sound pressure level / Sound calibrators for 1‘‘ and 1/2‘‘ microphones — 1 calibration item
and 4 more

Calibration principles (8)

Simulated electrical signal — 12 calibration items
Calculation based on sound analyzer measurement — 1 calibration item
Comparative method acc. to the nominal sensitivity of the standard microphone — 1 calibration item
Comparative method acc. to the nominal sound pressure level of the standard calibrator — 1 calibration item
Frequency counter measurement — 1 calibration item
Measurement by sound analyzer using multifunctional acoustic calibrator — 1 calibration item
Multifunctional acoustic calibrator — 1 calibration item
Speed calibration tool ACTIA AE944 4000 — 1 calibration item

Certificate information

Certificate date: 07.02.2025

Accreditation scope — calibration items (19)

CMC — lowest stated expanded measurement uncertainty (ILAC-P14, EA-4/02 M); if not stated otherwise, coverage probability approx. 95 % and values without a unit are relative to the measured value. The uncertainty of a specific calibration may be higher.

No.	Calibrated quantity / subject of calibration	Nominal range / parameters / CMC	Calibration principle	Calibration procedure
Calibration items
1	Tachometers for four-cylinder four-stroke engines	Calibration – rotational speed vibration tachometers — 800 min⁻¹ · CMC 1,03 min⁻¹ vibration tachometers — 1200 min⁻¹ · CMC 0,68 min⁻¹ vibration tachometers — 2398 min⁻¹ · CMC 0,64 min⁻¹ vibration tachometers — 3606 min⁻¹ · CMC 0,66 min⁻¹ vibration tachometers — 4808 min⁻¹ · CMC 0,71 min⁻¹ vibration tachometers — 5971 min⁻¹ · CMC 1,04 min⁻¹ induction tachometers — 800 min⁻¹ · CMC 0,58 min⁻¹ induction tachometers — 1200 min⁻¹ · CMC 0,58 min⁻¹ induction tachometers — 2398 min⁻¹ · CMC 0,58 min⁻¹ induction tachometers — 3606 min⁻¹ · CMC 0,58 min⁻¹ induction tachometers — 4808 min⁻¹ · CMC 0,58 min⁻¹ induction tachometers — 5971 min⁻¹ · CMC 0,60 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 800 min⁻¹ · CMC 0,64 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 1200 min⁻¹ · CMC 0,66 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 2398 min⁻¹ · CMC 0,58 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 3606 min⁻¹ · CMC 0,59 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 4808 min⁻¹ · CMC 0,60 min⁻¹ tachometers with measurement from a 12 V or 24 V electrical signal — 5971 min⁻¹ · CMC 0,59 min⁻¹ CMC for the field of measured quantity: Rotational speed	Speed calibration tool ACTIA AE944 4000	SOP_04
2	Frequency weightings by acoustic signals / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 31,5 Hz to 250 Hz — 70 dB to 95 dB · CMC 0,24 dB 500 Hz to 1 kHz — 70 dB to 95 dB · CMC 0,25 dB 2 kHz to 4 kHz — 70 dB to 95 dB · CMC 0,33 dB 8 kHz — 70 dB to 95 dB · CMC 0,46 dB 12,5 kHz — 70 dB to 95 dB · CMC 0,63 dB 16 kHz — 70 dB to 95 dB · CMC 0,80 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Multifunctional acoustic calibrator	ČSN EN 61672-3 ed. 2, odst. 12
3	Frequency weightings by electric signals / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 13
4	Frequency and time weightings at 1 kHz / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 1 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 14
5	Long-term stability / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 15
6	Level linearity on the reference level range / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,12 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 16
7	Toneburst response / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 18
8	C-weighted peak sound level / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 19
9	Overload indication / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,06 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 20
10	High-level stability / Sound analyzers	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,08 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61672-3 ed. 2, odst. 21
11	Relative attenuation at midband frequency / Fractional-octave-band filters	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,10 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61260-3, odst. 10.2
12	Effective bandwidth deviation / Fractional-octave-band filters	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,12 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61260-3, odst. 10.3
13	Linear operating range, dynamic measurement range, overload indication / Fractional-octave-band filters	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,10 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61260-3, odst. 11
14	Measurement of relative attenuation / Fractional-octave-band filters	Calibration – acoustic quantities and mechanical vibration 10 Hz to 20 kHz — 17 dB to 140 dB · CMC 0,10 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Simulated electrical signal	ČSN EN 61260-3, odst. 13
15	Frequency response in octave bands / 1/2‘‘ measurement microphones	Calibration – acoustic quantities and mechanical vibration 31,5 Hz to 250 Hz — 80 dB to 94 dB · CMC 0,27 dB 500 Hz to 1 kHz — 80 dB to 94 dB · CMC 0,28 dB 2 kHz to 4 kHz — 80 dB to 94 dB · CMC 0,35 dB 8 kHz — 80 dB to 94 dB · CMC 0,48 dB 12,5 kHz — 80 dB to 94 dB · CMC 0,64 dB 16 kHz — 80 dB to 94 dB · CMC 0,81 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Measurement by sound analyzer using multifunctional acoustic calibrator	SOP_01 (ČSN EN 61094-6, odst. 9)
16	Open-circuit sensitivity / 1/2‘‘ measurement microphones	Calibration – acoustic quantities and mechanical vibration 250 Hz — -45 dB to -20 dB · CMC 0,13 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Comparative method acc. to the nominal sensitivity of the standard microphone	SOP_02 (ČSN EN 61094-5 ed. 2, odst. 5)
17	Sound pressure level / Sound calibrators for 1‘‘ and 1/2‘‘ microphones	Calibration – acoustic quantities and mechanical vibration 250 Hz — 94 dB · CMC 0,15 dB 1 kHz — 94 dB · CMC 0,14 dB 250 Hz — 114 dB · CMC 0,14 dB 1 kHz — 114 dB · CMC 0,13 dB CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Comparative method acc. to the nominal sound pressure level of the standard calibrator	ČSN EN IEC 60942 ed. 2, odst. B.4.6
18	Sound signal frequency / Sound calibrators for 1‘‘ and 1/2‘‘ microphones	Calibration – acoustic quantities and mechanical vibration 94 dB and 114 dB — 250 Hz · CMC 0,08 % 94 dB and 114 dB — 1000 Hz · CMC 0,04 % CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Frequency counter measurement	ČSN EN IEC 60942 ed. 2, odst. B.4.7
19	Total distortion / Sound calibrators for 1‘‘ and 1/2‘‘ microphones	Calibration – acoustic quantities and mechanical vibration 94 dB and 114 dB; 250 Hz and 1 kHz — 0 % to 100 % · CMC 0,06 % (abs.) CMC for the field of measured quantity: Acoustic quantities and mechanical vibration	Calculation based on sound analyzer measurement	ČSN EN IEC 60942 ed. 2, odst. B.4.8

Reference standards (8)

SOP_01

SOP_02

SOP_04

ČSN EN 61094-5 ed. 2

ČSN EN 61094-6

ČSN EN 61260-3

ČSN EN 61672-3 ed. 2

ČSN EN IEC 60942 ed. 2

The same scope as data (JSON): https://labcoda.pl/api/accreditation-scopes/labs/CZ/2416