DO 9704 PRESSURE AND TEMPERATURE DATALOGGER
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DO 9704 MAIN CHARACTERISTICS AND APPLICATIONS - RECORD function with display of the peak, minimum and mean value. - Input A-B measurement function for pseudo differential measurements, pressure drops or flow rate with calibrated flanges. - Relative measurement function with respect to a given instant. - Zero correction function, especially useful for low pressures. - Stores up to 30,000 measurements with date and time of measurement and programmable interval from 1 sec. to 12 hours. - Double display for simultaneous viewing of the two inputs. - RS 232C serial output for a printer or for unloading data onto a PC. Typical applications for this instrument are in the following sectors: - Hydraulics - Fluidodynamics - Chemical plants and process controls - Compressors - Pumping plants - Flow rate measurements - Chimney draught - Moulding and presses for plastics and thermosetting materials - Level measurements INSTRUMENT TECHNICAL DATA Inputs/type of measurement 2 / pressure, flow rate or temperature Connector DIN 45326 8-pole No. conversions per second 2 Working temperature -5...+50°C Working relative humidity 0...90% R.H. no condensation Serial output RS 232C, 300...19200 baud (galvanically insulated) Display Double LCD 12.5 mm Functions Auto Power Off, Autorange, Hold, Record, Peak (5ms), Minimum, Mean, Relative, A-B (differential) Memory 512kB (FLASH) corr. To 30000 measurements Power supply 9V dc alkaline battery Autonomy Approx. 50 hours (continuous duty) Weight/dimensions 20 gr. / 215x73x38 mm INSTRUMENT ACCURACY Amb. T. measures -5...18 or 25...50°C Pressure measurements 0.1% FS + 0.1% RDG 0.1% FS + 0.1% RGD + 100ppm/°C RDG = measured value 0.2% FS + 0.5% RDG Flow rate measurements 0.2% FS + 0.5% RDG + 100ppm/°C 0.4°C 0.4°C + 0.01°C/°C -200...-50°C Temperatre 0.2°C 0.2°C + 0.01°C/°C -50...+200°C measurements 3°C 3°C + 0.01°C/°C +200...+800°C DO 9704 PRESSURE AND TEMPERATURE DATALOGGER The Delta Ohm DO 9704 pressure gauge and data logger has been designed for detecting pressure, flow rate and temperature, physical values which are very important in industrial and chemical processes. The instrument has two inputs and automatically recognises the probes connected, whether they be pressure or temperature probes or turbines for measuring flow rate. As the probes are interchangeable, it is possible to choose the most suitable combination for all applications without having to recalibrate the instrument. The operating principle of the pressure sensor is based on the deflection of a membrane in a sealed chamber in contact with the stream you want to measure the pressure. The flow may be liquid or gas. The flow rate measurement is based on the number of impulses or the frequency of a small fan. The DO 9704 is able to measure the following: Pressure: - differential or relative pressure from 10 mbar to 2 bar for air or non corrosive gases; - absolute and relative pressure from 0.2 bar to 1000 bar for measurements in contact with liquids or gases. - The measurement units are: bar, kPa, atm, mmHg, mmH2O and psi. - The instrument is able to detect peaks of around 5 milliseconds. Temperature: interchangeable probes are available with amplified Pt100 elements of the TP 870 series; the measurement can be in °C or °F. Flow rate: Flow rate can be measured with a turbine in the range from 2 to 2000 litres per minute in the measurement units LPM (litres per minute) or IPGM (Imperial Gallons per Minute). CLASSIFICATION OF PRESSURE MEASUREMENTS Pressure measurements are always relative to a reference pressure; there are four distinguish types that allow you to immediately define the reference pressure. - Absolute pressure (A=absolute) - Pressure with respect to absolute zero, ideal vacuum reference; the measured pressure is always higher than the reference pressure. - Overpressure (G=gauge) - Pressure measured with respect to the atmospheric pressure, environment pressure reference; the measured pressure is always higher than the reference pressure. - Depression (V=vacuum) - Pressure with respect to the atmospheric pressure, environment pressure reference; the measured pressure is always lower than the reference pressure. - Differential pressure (D=differential) - Pressure measured with respect to any reference pressure; the measured pressure may be higher or lower than the reference pressure. TP704… TP705… Pressure 101 Pressure Amb. T. 18 to 25°C

ORDER CODES DO9704: Pressure gauge, thermometer, data logger. The kit consists of instrument DO9407, carrying case, 9V batteries, DeltaLog1 software and user’s manual. CPA cable, 9CPRS232 cable for dowonload data, pressure probes, temperaure probes, fittings and gaskets have to be ordered separately. ACCESSORIES 9CPRS232: Sub D 9-pole extension cable female/female for RS232 (null modem). CPA: Connection cable L=1,5m, to connect the pressure probes to the instruments. DeltaLog-1: DeltaLog1 software for PC data download and PC data manager. KIT 2104: Set of ¼ BSPP fittings and gaskets for...

PRESSURE PROBES Bottom scale pressure Maximum overpressure Resolution Differential pressure NON insulated membrane ORDER CODES Relative pressure (compared to atmosphere) Insulated membrane Absolute pressure Accuracy From 20 to 25°C Working temperature Connection Insulated membrane 20.0 mbar 0.01 mbar • TP705-10MBD 0.5 % FSO 0..60 °C Tube Ø 5 mm 20.0 mbar 40.0 mbar 0.01 mbar • TP705-20MBD 0.5 % FSO 0..60 °C Tube Ø 5 mm 50.0 mbar 100 mbar 0.01 mbar TP705-50MBD 0.5 % FSO 0..60 °C Tube Ø 5 mm 100 mbar 200 mbar 0.1 mbar TP705-100MBD 0.25 % FSO 0..60 °C Tube Ø 5 mm 0.25 % FSO -10..+80 °C ¼ BSP...

1 20 2 21 3 22 4 23 5 24 6 25 7 26 8 27 9 28 10 29 11 30 12 31 13 32 14 33 15 34 16 35 17 36 18 19 PRESSURE REFERENCES Barometric Pressure Kg/cm 2 Vacuum Gauge -1 0 1 2 + - Differential + Line Pressure = 0 kg/cm 2 Absolute 0 1 2 + 104 Pressure 3 1 2 3 4 5 Input A, DIN 8-pole connector for pressure, flow rate or temperature. Display. Negative symbol input A. HOLD symbol. H symbol, flashes during RECORD function, permanently lit if the battery is running low. 6 Negative symbol input B. 7 The display shows the mean values. 8 REL symbol, indicates that the instrument is making a relative...