Lab activity

The Laboratory is certifi ed to carry out the calibratin and repair of seismographs, microphones and geophones manufactured by INSTANTEL Inc. Ottawa, Canada. Those instruments are designed to monitor the blasting eff ect on the environment. In addition to standard calibration methods, the Laboratory measures seismic eff ects of blasting, i.e. the velocity of oscillation, displacement, relative displacement, acceleration, air overpressure and shock wave in the water. The equipment includes 15 seismographs with a series of sensors.

Head of the Lab: This email address is being protected from spambots. You need JavaScript enabled to view it., Ass.Prof, PhD

List of methods and procedures

 Analytical procedure                                                                Test method

Calibration of the instrument Minimate with geophone and microphone

Instanel internal procedure

Calibration of the instrument Minimate Plus

Instanel internal procedure

Calibration of the instrument Minimate Blaster

Instanel internal procedure

Calibration of the instrument Blastmate II geophone and microphone

Instanel internal procedure

Calibration of the instrument Blastmate III

Instanel internal procedure

Calibration Blast Mate III DIN geophones

Instanel internal procedure

Calibration Blast Mate III and Minimate plus geophone

Instanel internal procedure

Calibration Blast Mate III E1 geophone

Instanel internal procedure

Calibration Blast Mate III E1 microphone

Instanel internal procedure

Calibration Blast Mate III and Minimate A-weight microphone

Instanel internal procedure

Small and medium sized equipment

 Name inventory        Tech.characteristics      Application                     Image

6.5 digit Precision Multimeter 8846A

DCV accuracy up to 0,0024 %.
DCV 100 mV – 1000 V, ACV 100 mV – 1000 V,
DCA 100 μA – 10 A, ACA 100 mA – 10 A,
Resistance 10 Ω – 1 GΩ, Frequency 3 Hz – 1 MHz,
Capacitance 1 nF – 0,1 F, Temperature -200 °C to  600 °C.
Using RS-232 or GPIB bus can be connected to a computer and controlled with a Labview program of Fluke program.

Measurement of electric voltage or current, load resistance, measurement of signal frequency and period, measurement of capacitance and temperature.

Multimetar 8846A

Shaker LDS V 555

Armature Diameter :110 mm
Sine Force (peak): 939 N,
Random Force (rms): 640 N
Usable Frequency Range: 5 Hz – 6300 Hz
Mass of Moving Element: 0.94 kg
Velocity (sine peak) – full-field: 1.5 m/s
Acceleration (sine peak): 100 g
Acceleration (random rms): 69 g
Displacement (pk–pk) – continuous: 25.4 mm

Calibration of geophones and vibration testing of products

Vibracijski stol

Amplifier PA 1000 L

Rated Sinusoidal Output Power: 1000 W

Amplifier for shaker

Pojačalo PA 1000 L

Field Power Supply FPS10L

Rated Output Power: 1000 W

Filed power supply for shaker

Napajanje FPS10L

Low –Frequency Calibrator Type 42E

Calibration levels up to 140 dB

Calibration of microphone

Niskofrekventna umjerna komora

4193-L-004 - ½-inch pressure-field microphone with Type 2669-L preamplifier and infrasound adaptor, 200 V polarization

Sensitivity: 12.5 mV/Pa
Frequency: 0.07 Hz – 20 kHz
Temperature: –20 to +80°C
Polarization: 200 V

Pressure measurement for calibration of microphone

Mikrofon s 2669-L

4370 - Piezoelectric charge accelerometer

Frequency: 0.1 - 4800 Hz
Sensitivity: 100 pC/g
Temperature :-74 - 250 ºC
Maximum Operational Level (peak):2000 g
Maximum Shock Level (± peak): 2000 g
Weight: 54 gram

Measurement of acceleration, velocity and displacement for geophones calibration

4370Piezoelektrični akcelometar

Charge to DeltaTron® Converter-2647

Gain : 1 mV/pC and 10 mV/pC
Lower limiting frequency: 0.17 Hz
Upper limiting frequency: 50 k Hz

Converter for accelerometer

Pretvornik naboja u DeltaTron

NEXUS amplifier 2690

CHARGE INPUT:
Max. differential charge: 10 nC (peak)
Frequency range: 0,1 Hz do 100 kHz

DeltaTron INPUT:
Connector: BNT
Max. input voltage: 31,6 V (peak)
Input impedance: 1 MΩ // 100 pF
Current source: 4 mA or 10 mA with a 28 V voltage source
Frequency range: 0,1 Hz do 100 kHz

Amplifier for microphone and accelerometer

NEXUS pojacalo 2690

33220A Arbitrary Waveform Generator, 20 MHz

Max. frequency (sine, square): 20 MHz
Amplitude range: 10 mVpp do 10 Vpp
Waveform types: Pulse, Ramp, Triangle, Noise and DC waveforms
Resolution: 14 bit
Sampling: 50 M samples per second
Arbitrary waveform memory: 64 000 points
Communication interface: USB, GPIB, LAN

Generation of one-time or continuous voltage signals of various amplitudes and frequencies

Signal generator

SR780 – Analizator signala

DC to 102.4 kHz bandwidth
90 dB dynamic range
145 dB dynamic range (swept-sine)
Real-time octave analysis
Up to 32 MB memory
GPIB and RS-232 interfaces

Signal analyse

Analizator signala
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