Keterangan
The Delta Ohm DO 9704 pressure gauge and datalogger 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 bending of a
membrane in a watertight chamber in contact with the fl ow of which you want to measure the pressure. The fl ow may be liquid or gas. The fl ow 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 may be in ° C or ° F.
Flow rate:
Flow rate may 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) .
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
Prioritas Indotrade