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At Texcel, our specialist team are passionate about delivering a product that continues to stay at the forefront of innovation and design. The GTM is one of the industry’s leading blast and vibration monitoring systems pioneered by Texcel. The ergonomic design of the GTM has been precision engineered to assist operations and compliance managers working within the Quarry, Mining, Construction and Civil Engineering industries. The GTM delivers unparalleled ease of operation, all contained within a lightweight package making transportation of this unit quick and easy.
Features include:
Sensors
Input ranges can be configured by the user in T-Link.
The Low Frequency Geophone (2 Hz) has a maximum range of ±55.6 mm/s.
The high-frequency roll-off of the sensors (unless otherwise specified) is at 30% of the sampling rate. The roll-off frequencies shown below are for the standard 1000 Hz sample rate.
Geophone – 4.5 Hz High Range
| Range | Up to ±111 mm/s (±4.37 in/s) |
| Resolution | 0.054 mm/s (0.0021 in/s) |
| Accuracy | ±5% @ 31.5 Hz |
| Bandwidth | 4.5 Hz to 300 Hz (-3 dB) |
| Threshold | Up to 111 mm/s (4.37 in/s) in steps of 0.054 mm/s (0.0021 in/s) |
Geophone – 4.5 Hz High-Mid Range
| Range | Up to ±55.6 mm/s (±2.19 in/s) |
| Resolution | 0.027 mm/s (0.0011 in/s) |
| Accuracy | ±5% @ 31.5 Hz |
| Bandwidth | 4.5 Hz to 300 Hz (-3 dB) |
| Threshold | Up to 55.6 mm/s (2.19 in/s) in steps of 0.027 mm/s (0.0011 in/s) |
Geophone – 4.5 Hz Mid Range
| Range | Up to ±27.8 mm/s (±1.09 in/s) |
| Resolution | 0.014 mm/s (0.00055 in/s) |
| Accuracy | ±5% @ 31.5 Hz |
| Bandwidth | 4.5 Hz to 300 Hz (-3 dB) |
| Threshold | Up to 27.8 mm/s (1.09 in/s) in steps of 0.014 mm/s (0.00055 in/s) |
Geophone – 4.5 Hz Low-Mid Range
| Range | Up to ±13.9 mm/s (±0.55 in/s) |
| Resolution | 0.0068 mm/s (0.00027 in/s) |
| Accuracy | ±5% @ 31.5 Hz |
| Bandwidth | 4.5 Hz to 300 Hz (-3 dB) |
| Threshold | Up to 13.9 mm/s (0.55 in/s) in steps of 0.0068 mm/s (0.00027 in/s) |
Microphone
| Range | 75 dBL to 138 dBL (±160 Pa) |
| Resolution | 0.12 Pa |
| Accuracy | ±5% @ 80 Hz |
| Bandwidth | 2.0 Hz to 300 Hz (-3 dB)
May be operated in “Peak Detect” mode, which meets the “Linear Peak Hold” or the “P” time-weighting characteristic as specified in AS1259.2 – 1990 |
| Threshold | Up to 138 dBL (160 Pa) in steps of 0.12 Pa |
Geophone – optional 2 Hz
| Range | N/A High Range
Up to ±55.6 mm/s (±2.19 in/s) Up to ±27.8 mm/s (±1.09 in/s) Up to ±13.9 mm/s (±0.55 in/s) |
| Resolution | Same as 4.5 Hz geophone |
| Accuracy | Same as 4.5 Hz geophone |
| Bandwidth | 2.0 Hz to 300 Hz (-3 dB) |
| Threshold | Same as 4.5 Hz geophone |
Triaxial Accelerometer
| Range | Up to ±30 m/s² (~ ±3 g)
Up to ±15 m/s² (~ ±1.5 g) Up to ±7.5 m/s² (~ ±0.75 g) Up to ±3.75 m/s² (~ ±0.375 g) |
| Resolution | 0.0146 m/s² (0.00149 g) High Range |
| Accuracy | ±5% @ 31.5 Hz |
| Bandwidth | 0.4 Hz to 300 Hz (-3 dB)
0.4 Hz to 100 Hz (-3 dB) VDV Mode |
| Threshold | Up to 30 m/s² (~ 3 g) in steps of 0.0146 m/s² (0.00149 g) High Range |
Cables
The maximum supported cable length for geophones, triaxial accelerometers and other active sensors is 100 m. The maximum supported cable length for the microphone is 10 m.
Waveforms
| Record modes | Single shot (Threshold, Auto), continuous logging |
| Sample rates | From 20 to 25 000 samples per second (sps) depending on settings |
| Record time | 128 to 131 072 points (0.128 to 131.072 seconds at 1000 sps) |
| Pre-trigger | 0% – 90 % in 10 % steps |
| Memory | 329 × 4 s waveforms at 1 000 samples per second, with 1 062 summaries
33 194 summaries with no waveforms |
User Interface
| Display | LCD 16 characters × 2 lines, with backlight
Transparent waterproof cover on case |
| Keypad | 6 domed tactile keys + power switch |
| Connectors – top panel | Mini USB for PC communications Charger |
| Connectors – sensors | MS12-10 for triaxial geophone
RO4-6 for microphone |
Power Supply
| Batteries | Internal rechargeable NiMH 4.3 A·h @ 9.6 V
336 hours continuous run time (depending on Settings) |
| Charger | International voltage (90 V to 260 V, 50 Hz to 60 Hz)
IEC320-C8 cable |
| Recharge Time | Approx. 6 hours |
Physical
| Temperature | Operating 0°C to 70°C (32°F to 158°F)
Display 0°C to 50°C (32°F to 122°F) |
| Dimensions | 191 mm × 129 mm × 80 mm |
| Weight | 1.6 kg |
| Environmental | Sealed to IP65 when geophone and microphone connected, or caps in place |
Additional Notes
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