OMICRON HGT1
Technical Data
Technical Specifications
The OMICRON HGT1 is a handheld grounding tester. The following tables detail its technical specifications.
Table 1-1: HGT1 Input
| Input Impedance Selection | Input Impedance | Voltage | Accuracy (15 Hz - 20 kHz) | Residual Noise (100 Hz mode) |
|---|---|---|---|---|
| 1 kΩ | 1 kΩ | 25 VRMS | +0.5 %; -1.0 % | |
| 1 kΩ + 1 kΩ | 2 kΩ | 50 VRMS | +0.5 %; -1.0 % | < 10 uV |
| HIGH Z | 200 kΩ | 25 VRMS | +0.5 %; -1.0 % |
Table 1-2: FFT Specifications
The HGT1 utilizes zoom FFT with the following parameters:
- FFT size: 512 samples
- FFT resolution: 142 bins
- FFT repetition rate: 187.5 Hz (one FFT per 5.3 ms).
The FFT results displayed on the HGT1's screen are updated every 50 ms by averaging the individual FFT results.
Table 1-3: FFT parameters for 100 Hz and 400 Hz frequency range selection
| Frequency range selection | 100 Hz | 400 Hz |
|---|---|---|
| Frequency range | 104 Hz | 414 Hz |
| Frequency resolution | 0.73 Hz | 2.92 Hz |
| Window size | 1.37 s | 342 ms |
| Overlapping | 99.6 % | 98.4 % |
Figure 1-1: Filter selectivity for 100 Hz range
A graph illustrating filter selectivity for the 100 Hz range. The X-axis represents the offset from output frequency in Hz, ranging from -10 to 10. The Y-axis represents attenuation in dB, ranging from 0 to -100. The graph shows a peak at 0 Hz offset, with a sharp decline in attenuation as the offset increases.
Table 1-4: Environmental Conditions
| Parameter | Value |
|---|---|
| Temperature | -10 °C (14 °F) ... +50 °C (122 °F) |
| Humidity | 5 % to 90% RH, non-condensing |
Table 1-5: Mechanics
| Parameter | Value |
|---|---|
| Dimensions (L x W x H) | 180 mm x 90 mm x 45 mm 7.1" x 3.5" x 1.8" |
| Weight | 480 g (1 lb) including Li-Po battery |
CE Declaration of Conformity
CE
We, the manufacturer, NTi Audio AG, Im alten Riet 102, 9494 Schaan, Liechtenstein, Europe, hereby declare that the HGT1, released in 2013, complies with the following standards or other standard documents:
- EMC: 2004/108/EG
- Harmonized standards: EN 61326-1
- Explosive atmospheres (ATEX): 94/9/EG
- Directive 2011/65/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS).
- Directive 2002/96/EC on waste electrical and electronic equipment (WEEE).
This declaration will become invalid if modifications to the instrument are carried out without the written approval of NTi Audio.
Date: 1 February 2013
Signature: M. Becker
Position: Technical Director
