Differential pressure meter testo 312-4

Measurements carried out with the testo 312-4 differential pressure meter

Checking of tightness and serviceability by pressure reduction on gas pipelines according to DVGW TRGI 2008

Load testing on gas pipelines according to DVGW-TRGI 2008 using Testo high pressure probe (optional order)

Pressure testing on pipes with Testo high pressure probe (optional order)

Check the gas pressure regulator by recording the measured values over a specified period of time (up to 25,000 measured values)

Check gas connections and gas line pressure, as well as nozzle pressure settings on gas burners or boilers

Practical features of the testo 312-4 differential pressure meter

The testo 312-4 differential pressure measuring device is extremely convenient for efficient pressure measurement – for example, with pre-set measuring procedures or clear display of measurement results. The Testo fast printer (optional) enables you to print out measurement data directly on site. You can use the easyheat PC software (optional) to transfer and analyse data. In addition, a wide range of measuring probes are available for attachment to the testo 312-4 for various measuring tasks (e.g. high-pressure probes or thermocouple probes for temperature measurement).

Provide cover: Differential pressure meter testo 312-4, batteries and factory test paper.

Technical specifications of testo 312-4

Temperature – TC Type K (NiCr-Ni)
Measuring range	depends on the type of probe used
Accuracy	±0.4 °C (-100 to +200 °C)* ±1 °C (rest of range)*
Resolution	0.01°C

Temperature – TC Type K (NiCr-Ni)

Measuring range

depends on the type of probe used

Accuracy

±0.4 °C (-100 to +200 °C)*

±1 °C (rest of range)*

Resolution

0.01°C

*Accuracy information applies only to the device when no probe is connected.

Differential pressure (internal sensor)
Measuring range	0 to 200 hPa
Accuracy	±0.03 hPa (0 to +3 hPa) ±1.5 % measured value (+3.1 to +40 hPa) ±2 hPa or ±1 % of fsv (41 to +200 hPa)
Resolution	0.01 hPa

Differential pressure (internal sensor)

Measuring range

0 to 200 hPa

Accuracy

±0.03 hPa (0 to +3 hPa)

±1.5 % measured value (+3.1 to +40 hPa)

±2 hPa or ±1 % of fsv (41 to +200 hPa)

Resolution

0.01 hPa