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

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.
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

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

Accessories

RS232 cable

Order Number: 0409 0178

Connection cable

Order Number: 0430 0143

TopSafe (protective case)

Order Number: 0516 0446

Hose set for testo 312-4

Order Number: 0554 3172

Product Brochures

Manuals

Software

  • Software EasyHeat for testo 300, 312-4, 320, 324, 330, 380  (v2.12, EXE, 101.938 KB) If you already have the testo EasyHeat software installed, your version will be updated. The Update is possible with every version of the testo EasyHeat. This version can also be used as a demo version for  costumers  who don't have installed the testo easyheat software at the moment. It will void after 30-days, but can be activated with a serial code at every time.