Remote measurement of under-explosive concentrations of combustible gases and vapors of petroleum products.
Specifications
| Detectable components | propane, methane, butane, hexane | ||
|---|---|---|---|
| Verification gases | propane, methane | ||
| Measurement range, % of LEL | from 0 to 50 (detectable components: butane, hexane) from 0 to 100 (other detectable components) | ||
| Sampling method | diffusion | ||
| Principle of measurement | optical absorption | ||
| Interval between verifications, months | 12 | ||
| Indications setting time (T90), s, not more than | 60 | ||
| Heating time, s, not more than | 60 (at ambient temperature, from -50 до +80 ℃); 1200 (at ambient temperature from -60 to -50 ℃) | ||
| Acceptable power supply voltage (DC), V | from 8 to 50 | ||
| Power consumption, W, not more than | 7.5 | ||
| Interfaces (protocols) | SENS (SENS), RS-485 (Modbus RTU), 4-20 mA (HART) | ||
| Signal relay features: | maximal switchable DC/AC voltage, V | 250 / 50 | |
| maximal switchable current, A | 3 (AC) / 1 (DC) | ||
| Number of configurable thresholds of alarm signaling | 2 | ||
| Diameter of connectible cable without armor, mm | from 5 to 20 | ||
| Maximal cross-sectional area of connectible conductors, mm², not more than | 2.5 | ||
| Climatic modification as per GOST 15150 | UHL1* | ||
| Main absolute inaccuracy within range from 0 to 60% level measurement of LEL, % LEL, not more than | ±3 (detectable components: propane, methane) ±5 (other detectable components) | ||
| Main relative inaccuracy of measurement withing range from 60 to 100% LFL, %, not more than | ±5 (detectable components: propane, methane) | ||
| Ambient temperature range, ℃ | from -60 to +80 | ||
| Protection degree as per GOST 14254 | IP66 | ||
| Explosion-proof marking | 1 Ex d IIB T6…T5 Gb Х | ||
| Overall dimensions W x H x D, mm, not more than | 388 × 146 × 116 | ||
| Mass, kg, not more | 4 (net) / 5 (gross) | ||
| Service life, years | 15 | ||
| Mean time between failures, hours, not less than | 75000 | ||