TESTO 312-4 Instruction Manual
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TESTO 312-4 Instruction Manual

TESTO 312-4 Instruction Manual

Pressure measuring instrument
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testo 312-4 · Pressure measuring instrument
Instruction manual

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Summary of Contents for TESTO 312-4

  • Page 1 312-4 · Pressure measuring instrument Instruction manual...

  • Page 3: Table Of Contents

    1 Contents Contents Contents ....................3 Safety and the environment ..............5 2.1. About this document ................ 5 2.2. Ensure safety ................... 6 2.3. Protecting the environment .............. 6 Specifications ..................7 3.1....................7 3.2. Technical data ................. 8 Product description .................
  • Page 4 1 Contents Maintaining the product ............... 33 Tips and assistance ................34 8.1. Questions and answers ..............34 8.2. Accessories and spare parts ............34...

  • Page 5: Safety And The Environment

    2 Safety and the environment Safety and the environment 2.1. About this document > Please read this documentation through carefully and familiarize yourself with the product before putting it to use. Pay particular attention to the safety instructions and warning advice in order to prevent injuries and damage to the products.

  • Page 6: Ensure Safety

    > Dispose of faulty rechargeable batteries/spent batteries in accordance with the valid legal specifications. > At the end of its useful life, send the product to the separate collection for electric and electronic devices (observe local regulations) or return the product to Testo for disposal.

  • Page 7: Specifications

    3 Specifications Specifications 3.1. The testo 312-4 is a handy pressure measuring instrument that was developed specifically for use in heating system installations. The main areas of use and measuring tasks are: Gas pipes DVGW-TRGI 2008 • Performance of the pretest in acc. with •...

  • Page 8: Technical Data

    Dimensions (L x W x H) 219 x 68 x 50 mm/8.5" x 2.5" x 2" Measuring rate Auto: 1 sec to 24 h, quick: 0.04 sec Adaption time 10 min Refresh rate of display 2/sec, with rapid measurement: 4/sec Warranty 24 months, warranty conditions: See web page www.testo.com/warranty EC Directive 2014/30/EC...

  • Page 9: Product Description

    4 Product description Product description 4.1. Overview 4.1.1. Control elements and connections 1 IR interface for protocol printer 2 Keyboard Function Print Select reading 1 (top line), select menu item Switching on/off Saving data Open menu level, confirm selection, execute function Zero pressure probes Cancel process, menu level back...

  • Page 10: Display

    4 Product description Function Keep reading, display maximum/minimum/mean value 3 Battery compartment (on rear) 4 Connections Connection Function Socket 1: Thermocouple probe (type K), NTC probe, pressure probe Socket 2: Thermocouple probe (type K), NTC probe, pressure probe RS 232 PC connection 12 V DC 12 V DC mains unit (0554 0088)
  • Page 11 4 Product description 1 Status information Icon Function Counter for identifying the stored protocols in the case of manual, automatic and fast storage of the measurement series. Counter for identifying the measurement data in a measurement series in the case of automatic and fast storage.

  • Page 12: Menu Overview

    4 Product description 4.1.3. Menu overview The menu is organized into up to 3 levels, depending on the function. Level 1 Level 2 Level 3 1 Measurements 11 Pretest 12 LeakRate 13 Maintest 2 Location 3 Memory 31 Man/Auto 32 Config. 33 Print 34 Status 35 Delete...

  • Page 13: Basic Properties

    7 Gas type 4.2. Basic properties Voltage supply The power can be selectively supplied to the testo 312-4 via: • 9 V monobloc battery, type: IEC 6LR61 (included in delivery) • 9 V monobloc rechargeable battery, type: NiMH IEC 6F22 (0515 0025) •...

  • Page 14: First Steps

    5 First steps First steps Insert battery/rechargeable battery. To avoid the loss of data, it is imperative that you switch the instrument off when changing the battery/rechargeable battery and replace the battery within 10 min. 1. Open the battery compartment on the rear of the instrument. 2.

  • Page 15: Using The Product

    6 Using the product For the initial commissioning or after a factory reset, the Language function is automatically opened. Set the required menu language: > Select the language with and confirm with The current readings are displayed. The instrument is now operational.

  • Page 16: Location

    6 Using the product 6.1.1. Location 1. Use in main menu to select Location. 2. Use to activate setting mode. The location that is currently set will be displayed. If a location designation was assigned by the Easyheat software, this is also shown.
  • Page 17 6 Using the product • Fast: 25 measurements are automatically recorded per second by pressing in the measurement view. A fast measurement is only possible with pressure probes or an internal pressure sensor. Only 1 channel can be evaluated and the following sequence applies: external pressure sensor before internal pressure sensor, channel 2 before channel 1.

  • Page 18: Instrument

    6 Using the product Status Indicates the available memory space as a %. Delete The complete memory content can be erased. It is not possible to erase individual protocols or locations. > Select using and confirm selection with • If you select Yes: The memory content will be erased. •...

  • Page 19: Service

    6 Using the product Unit The units of the parameters can be set. Which units are available depends on the selected setting under ISO/US: • ISO: Pa, hPa, mbar, kPa, bar, psi, mmWS, Torr • US: Pa, hPa, mbar, kPa, bar, psi, InW, InHg The following parameter assignments are possible: •...
  • Page 20 6 Using the product Language The instrument menu language can be set. The following languages are available: > Select the desired language with and confirm the selection with Bat. type The battery type that is used can be set. The battery can only be recharged in the instrument if a rechargeable battery is inserted and the battery type is set to RechBatt.

  • Page 21: Input

    6 Using the product Function Setting after factory reset Pressure unit Temperature unit °C Battery type Battery Language English Save Manual Gas type Natural gas > Select using and confirm selection with • If you select Yes: the factory reset will be performed. •...
  • Page 22 6 Using the product 1. Set reference pressure value using . Hold the key down to go forward/back quickly. 2. Confirm the selection with The instrument changes to the Volume function. Volume The performance volume is required for the measurement of leakage rate.

  • Page 23: Gas Type

    6 Using the product Pabs (absolute pressure) The absolute pressure that is used to calculate the density can be set. 1. Set absolute pressure using . Hold the key down to go forward/back quickly. 2. Confirm the selection with 6.1.6. Gas type 1.

  • Page 24: Connection Variations

    6 Using the product • Do not subject the housing to mechanical strains during measurement. Warning! Risk of explosion due to gas escaping from a leaky measuring system! > Check the complete measuring system for leaks before any measurements at pipes carrying gas, e.g.
  • Page 25 6 Using the product Pretest and high pressure at water pipes High-pressure probe Pressure test set High pressure stage stop Compressor...

  • Page 26: Zeroing The Display

    6 Using the product Main test, leak rate, regulator testing Conical test stop Pressure test set Balloon pump 6.2.3. Zeroing the display To zero the display of the internal pressure sensor, the instrument must be in measurement view and there must be a differential pressure of <...

  • Page 27: Save Readings/Implement Measurement Program

    6 Using the product 6.2.4. Save readings/implement measurement program For the readings to be saved, the instrument must be in the measurement view. Depending on the set save mode, the save process is performed differently: Save mode Manual Retaining the current readings. Automatic Saving the readings for an extended period of time.

  • Page 28: Print Readings

    6 Using the product Fast save mode is set: 1. Press to begin the measurement program. 25 measurements are automatically saved per second. 2. Press to end the measurement program. 6.2.5. Print readings For individual readings to be printed, the instrument must be in the measurement view.

  • Page 29: Perform Measurement Procedures

    6 Using the product 5. Calculate the multi-point mean with The calculated mean is displayed and can be stored or printed out. > Reactivate the mean calculation with > Cancel the process with 6.3. Perform measurement procedures Special measurement procedures are saved in the instrument that support you when performing special measuring tasks.
  • Page 30 6 Using the product Configure measurement procedure 1. Use in main menu to select Measure and confirm selection with 2. Select Pretest Maintest with and confirm selection with If you wish to use the preset values for the stabilization time and measurement period, continue directly to the begin of the measurement procedure as follows: >...

  • Page 31: Leak Rate/Usability After Pressure Drop

    6 Using the product 6.3.2. Leak rate/usability after pressure drop Leak rate measurement in acc. with DVGW-TRGI 2008 worksheet G 624. The measurement of leaks is used for the serviceability test of an existing gas pipe system. The pipe must be cleared of gas before the test.
  • Page 32 6 Using the product 5. Set the absolute pressure with and confirm with If you wish to use the preset values for the pipe volume, continue directly to the begin of the measurement procedure as follows: > Confirm preset value with Three circular diameters (in mm) and three pipe lengths (in m) can be entered, from which three partial volumes can be calculated.

  • Page 33: Maintaining The Product

    7 Maintaining the product Maintaining the product Changing the battery/rechargeable battery To avoid the loss of data, it is imperative that you switch the instrument off when changing the battery/rechargeable battery and replace the battery in < 10 min. 1. Open the battery compartment on the rear of the instrument. 2.

  • Page 34: Tips And Assistance

    (PC software, printout). 8.2. Accessories and spare parts Description Article no. testo 316-1 gas leak detector 0632 0316 Differential pressure probe, 100 Pa 0638 1347 Differential pressure probe, 10 hPa 0638 1447 Differential pressure probe, 100 hPa...
  • Page 35 Table mains unit with international connection 0554 1143 Test pump for setting the test pressure 0554 3157 9 volt rechargeable battery for testo 312-4 0515 0025 Battery charger for 9 V rech. battery, for external 0554 0025 charging of rech. battery...
  • Page 36 8 Tips and assistance Description Article no. TopSafe for testo 312-4 0516 0446 Magnetic holder for TopSafe 0554 0225 Easyheat PC software 0554 3332 RS232 cable, connecting measuring instrument 0409 0178 to PC System case 0516 3121...
  • Page 38 0970 3126 en 06 V01.05...

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