Measurement

Verification of electrical and non-electrical quantities

Counters of what quantities we are able to verify in our laboratories.

Electrical quantities

Accuracy given in ± (% of reading +% of range)
DC voltage

range	accuracy 1 year after calibratio
100 mV	0.0050 + 0.0035
1 V	0.0040 + 0.0007
10 V	0.0035 + 0.0005
100 V	0.0045 + 0.0006
1000 V	0.0045 + 0.0010

Alternating current – True RMS ranges 100 mV, 1 V, 10 V, 100 V, 750 V

frequency	accuracy 1 year after calibration
3 – 5 Hz	1.00 + 0.03
5 – 10 Hz	0.35 + 0.03
10 Hz – 20 kHz	0.06 + 0.03
20 – 50 kHz	0.12 + 0.05
50 – 100 kHz	0.60 + 0.08
100 – 300 kHz	4.00 + 0.50

Electrical resistance

range	accuracy 1 year after calibration
100 Ω	0.010 + 0.004
1 kΩ	0.010 + 0.001
10 kΩ	0.010 + 0.001
100 kΩ	0.010 + 0.001
1 MΩ	0.010 + 0.001
10 MΩ	0.040 + 0.001
100 MΩ	0.800 + 0.010

Direct current

range	accuracy 1 year after calibration
100 µA	0.050 + 0.025
1 mA	0.050 + 0.006
10 mA	0.050 + 0.020
100 mA	0.050 + 0.005
1 A	0.100 + 0.010
3 A	0.200 + 0.020
10 A	0.120 + 0.010

Alternating current rozsahy 100 µA, 1 mA, 10 mA, 100 mA

frequency	accuracy 1 year after calibration
3 Hz – 5 kHz	0.10 + 0.04
5 – 10 kHz	0.10 + 0.04

range1 A

frequency	accuracy 1 year after calibration
3 Hz – 5 kHz	0.10 + 0.04
5 – 10 kHz	0.10 + 0.04

range 3 A

frequency	accuracy 1 year after calibration
3 Hz – 5 kHz	0.23 + 0.04
5 – 10 kHz	0.23 + 0.04

range 10 A

frequency	accuracy 1 year after calibration
3 Hz – 5 kHz	0.15 + 0.04
5 – 10 kHz	0.15 + 0.04

Frequency **ranges of voltage 100 mV, 1 V, 10 V, 100 V, 750 V ** accuracy in ±(% of measured values )

range	accuracy 1 year after calibration
3 – 10 Hz	0.100
10 – 100 Hz	0.030
100 Hz – 1 kHz	0.010
1 – 300 kHz	0.010
obdélníkový signál	0.010

Neelektrické veličiny

Calibration of thermometers contact-less
IR kalibrátor IR-500 – černé těleso
rozsah: 50 to 500°C

rozsah	accuracy
< 100°C	±0.8°C
100 až 200°C	±1.6°C
200 až 500°C	±2.8°C

Calibration of contact thermometers
Calibration bath Transcat 7320
Calibration of contact thermometers in the range –20°C to 150 °C. stability:

• ±0,005 °C at –20 °C (ethanol)
• ±0,005 °C at 25 °C (water)
• ±0,007 °C at 150 °C (oil)

Temperature
Multimetr Agilent 34461A

probe	accuracy 1 year after calibration
PT100 (DIN/ IEC 751)	probe accuracy + 0.05 °C
5 kΩ termistor	probe accuracy + 0.1 °C

Humidity
Sensirion EK-H4

sensor	range	accuracy of humidity measurement	accuracy of temperature measurement
SHT21	0 to 100% RH	± 2% (in the range 20% až 80% RH)	± 0.3 °C
SHT71	0 to 100% RH	± 3% (in the range 20% až 80% RH)	± 0.4 °C
SHT75	0 až 100% RH	± 1.8% (v rozsahu 10% až 90% RH)	± 0.3 °C