testo 312-4 – Pressure Measuring Instrument
Product Descriptions
With the electronic differential pressure gauge testo 312-4, fine pressure measurements can be carried out quickly and reliably when checking the resting pressure and flow pressure of gas, and when setting the correct jet pressure on gas burners and boilers. Tests on newly installed gas pipes (load and gas-tightness tests), or on pipes already in use (serviceability tests) can also be carried out quickly and in accordance with the law. Time and money can be saved in customer service when checking the gas pressure regulator, thanks to the automatic measurement value recording over several hours by testo 312-4 (max. 25,000 measurement values).
| Technical Data | |
| Measuring range | dependent on probe type used |
| Accuracy | ±0.7 °F (-148° to 392 °F) * / ±0.4 °C (-100 to +200 °C) * |
| ±2 °F (Remaining Range) * / ±1 °C (Remaining Range) * | |
| *Accuracy information applies only to instrument without probes connected | |
| Differential pressure (internal sensor) | |
| Measuring range | 0 to +80 InH₂O / 0 to +200 hPa |
| Accuracy | ±0.01 InH₂O (0 to +1 InH₂O) / ±0.03 hPa (0 to +3 hPa) |
| ±1.5 % of mv (+1.2 to +16 InH₂O) / ±1.5 % of mv (+3.1 to +40 hPa) | |
| ±1 InH₂O or ±1 % of full-scale value (16 to +80 InH₂O) / ±2 hPa or ±1 % of fsv (41 to +200 hPa) | |
| Resolution | 0.01 InH₂O / 0.01 hPa |
| Pressure measurement (external probe) | |
| Measuring range | 0 to +363 psi / 0 to +25 bar |
| Accuracy | ±0.6 % of full-scale value (0 to +363 psi) / ±0.6 % of fsv (0 to +25 bar) |
| ±0.6 % of full-scale value (>+145 to +363 psi) / ±0.6 % of fsv (>+10 to +25 bar) | |
| Resolution | 10 InH₂O / 10 hPa |
| General technical data | |
| Dimensions | 9 x 3 x 2 in. / 219 x 68 x 50 mm |
| Interface printer | Infrared interface |
| Data transfer | RS232 |
| PC software | Easyheat |
| Memory | 25,000 measuring values |
| Weight | 21 oz. / 600 g |
