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testo 312-4 - Differential pressure measuring instrument up to 200 hPa

Order-Nr. 0632 0327

Tightness testing and load testing on gas pipes
Serviceability testing with air by pressure drop on gas pipes
Pressure testing on drinking water and waste water pipes using air
Automatic recording of measuring values over several hours

Differential pressure gauge testo 312-4

Details

Product Description

A measuring instrument for carrying out all necessary tests on gas heaters and pipes as well as water pipes. Inherently safe thanks to the use of C-Flex hoses with high impermeability. Legally compliant measurement procedure for pre-test, main test and leakage quantity measurement on gas pipes. Recording of measurement values over a defined period (e.g. 24 h) and data transfer and analysis on PC software incl. graphic presentation.

Delivery Scope

testo 312-4 differential pressure measuring instrument, including battery and calibration protocol.

Technical Data

Temperature - Type K TC
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)*
Resolution	0.01 °F t1 / 0.01 °C

Temperature - Type K TC

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)*

Resolution

0.01 °F t1 / 0.01 °C

*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

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 145 psi) / ±0.6 % of fsv (0 to 10 bar) ±0.6 % of full-scale value (>145 to 363 psi) / ±0.6 % of fsv (>10 to 25 bar)
Resolution	4 InH₂O / 10 hPa

Pressure measurement (external probe)

Measuring range

0 to 363 psi / 0 to 25 bar

Accuracy

±0.6 % of full-scale value (0 to 145 psi) / ±0.6 % of fsv (0 to 10 bar)

±0.6 % of full-scale value (>145 to 363 psi) / ±0.6 % of fsv (>10 to 25 bar)

Resolution

4 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