Delta DO 9704 manual Probe Connection, HOW to Measure

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ENGLISH

PROBE CONNECTION

One or two pressure probes, one or two temperature probes may be connected to the DO 9704 pressure and temperature gauge - data logger. The pressure probes of the TP 704 series have a 1/4” BSP male threaded coupling and must be screwed into the fitting in which the pressure is to be measured; the probes of the TP 705 series have a ∅ 5 mm. coupling to which will be connected a suitable tube for taking the desired measurement; take great care with the pressure seal of the fitting, if necessary using gaskets and suitable fittings. The threaded coupling is protected by a pla- stic cap; put the cap back after use, as it protects the pressure cell against foreign bodies. IT IS VERY IMPORTANT to ensure that the full scale value of the probe is higher than the pressure that is to be measured. If you do not know the value, start off using probes with high capacities. Using the CPA cable, connect the pressure probe to the instrument and then take the measurement. The same operations are carried out when using two temperature probes at the same time. The tempe- rature probe must be connected to input A or B of the instrument or to both if there are two probes; then measure the temperature with the sensitive part of the probe. Depending on the case, immer- sion, contact, penetration or air probes will be used.

The same applies to probes for measuring flow rate; in this case ensure that the connection cable is specifically configured for the flow rate or for the number of impulses of the turbine.

HOW TO MEASURE

1.Press the ON/OFF key to switch on the instrument.

*This operation enables the automatic cut-out timer.

If you wish power supply without automatic interruption, when switching on, press the HOLD and ON/OFF keys simultaneously and keep the HOLD button held down for the duration of the switching-on routine. The battery symbol flashes at a frequency of 1 Hz, indicating that the Auto Power Off function is disabled.

*When the instrument is switched on all the numbers and symbols light up for a few moments, allowing you to check that all the display segments are working.

*After a few moments it moves on to normal operation.

2.Checking display.

*After all the segments are lit, the instrument is ready to measure in the engineering unit (Pa, bar, psi, atm, mmHg, mH2O) set before the instrument was switched off.

*If a probe is broken or is not properly connected, the Err signal appears. In this case the sensor part and/or the connector must be checked.

3.Selection of the measuring unit.

*Press the Unit A key repeatedly to show, at the top of the display, the measurement of the pro- be connected to input A in the desired measuring unit; press the Unit B key repeatedly to show, at the top of the display, the measurement of the probe connected to input B in the desired

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Contents Instructions Manual Page Pressure and Temperature DATA-LOGGER English Introduction Keyboard KEY NumbersNumbers Function DescriptionSimbols LIT Besides RELTom of the display Simbols LIT Besides Function Numbers DescriptionSerial Output 300 Baud P0+Press the Prog key to move on to step P1 600 BaudP1+ = data dump Hours minutes Seconds P1+Storage This parameter is used for the fol- lowing two functionsFunction P3+ P4+ = set yearP5+ = set month P6+ = set day P7+ = set hours P8+ = set minutes P9+ Self cut-outP10 P10+To stop storage, press the Enter key Complete printing Reduced printingData Call P11+P11 + Start-StopKEY Simbols LIT Besides Operating modeWhen this operative Ches itself off againIf the battery symbol does not fla Simbols LIT Besides Function Numbers Description EnterMore than 30,000 acquisitions Restart itAfter having taken note HOW to Measure Probe ConnectionVarious operations Temperature Measurement Method of Using the Instrument and WarningsFUL Instrument Signals and MalfunctionsErr LOULOW Battery Warning and Battery Replacement Storage of the Instrument Serial Interface RS 232CType of terminal Command Type ReplyParity None Bit Stop bit Protocol Xon/Xoff Dumping data from the memoryMemory clear Diagram do PrinterExample of a Report Printed by the Instrument English Hardware connection Software connection with WindowsOK to confirm the setting one click Mark local Echo one click 100 101 Switch on the measuring instrument 102OK to confirm Cancel in the next window 103Parity None 104105 106 107 108 109 To quit running the Hyper Terminal To end receiving data from an instrumentSelect END from the pull-down sub-menu one click 110Calibrating the Instrument do Vdc=465.5Flow Rate Measurements Connection of Probes to the Pressure Gauge Data Logger do Probe connection diagram Instrument do113 Turbine probe for measuring flow rate SEL R100 105 110 115 Between 4Classification of Pressure Measurements GaugeConversion Factors and Tables = 3,386 x 103 Pa Psi = PaPsi = kPa = 2,491 x 102 Pa118 Weight / dimensions 320 gr. / 215x73x38 mm Instrument Technical DataConnector DIN 45326 8-pole Minimum, Mean, Relative, A-B differential120 121 Order Codes Guarantee Display blocked Examples of USE of the KeyboardSerial line 124Pressing Data Call repeatedly gives 125Instrument programming Sets hour Sets yearSets day 127Date and time Enables self cut-out +Normal operating Data printing is reduced 128Function Activation or disactivation of the serial outputActivation or disactivation of the Record function Serial output activeActivation and disactivation of the storage function 130Index 131132 Safety EN61000-4-2, EN61010-1 level
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