DPM4

DPM4 Parameter Tester is a highly accurate meter for testing a wide range of medical devices. Key features include its lightweight, compact size and battery operation.

The DPM4 is available in four models: 1H, 1G, 2H, and 2G. The DPM4-1G is the replacement for the popular, but now obsolete DPM3. Basic parameters cover pressure, vacuum, and temperature measurements (Models 1H and 1G). Gas flow, barometric pressure and humidity measurements are included in the enhanced Tester (Models 2H and 2G). The Tester is menu-driven and simple to operate. All functions are set from a 128 x 32 pixel graphical display

DPM4 is ideal for the testing done as part of preventive maintenance or repair processes whenever measurement of pressure, flow, or relative humidity is required.

Palm size
High accuracy
Differential pressure, vacuum, and temperature measurements
Multiple user-selectable units of measurement
Simultaneous display of multiple parameter measurements
Leak detection/leak-rate calculation
RS232 for computer control
Pressure measurements from -700 mmHg to +5000 mmHg range (applies to the 1G and 2G models only)
Barometric-pressure, flow, and humidity measurements (applies to the 2G and 2H models only)

Pressure Measurement

DPM4 Model 1H or 2H

Operating range:	-350 mmHg to 350 mmHg
Accuracy:	± 0.3 % of range
Resolution:	0.1 mmHg
Units of measure:	mmHg, mBar, cmH2O, PSI, InHg, InH2O, kgcm2 and kPa

DPM4 Model 1G or 2G

Operating range:	-700 mmHg to 5000 mmHg
Accuracy:	0.3 % of range for temperatures from 21 ºC to 25 °C and relative humidity from 30 % to 70 %; 0.3 % of range plus 0.02 % of range per degree C for temperature < 21 °C or > 25 °C with relative humidity from 30 % to 70 %
Resolution:	0.5 mmHg
Units of measure:	mmHg, mBar, cmH2O, PSI, InHg, InH2O, kgcm2 and kPa

Temperature Measurement

All Models (DPM4-1H, 1G, 2H, 2G)

Operating range:	-40 ºC to 200 ºC
Accuracy:	± (2 % of reading, 0.5 ºC)
Resolution:	0.1 °C and °F
Units of measure:	°C and °F
	Use standard external temperature probe type PT-100 or PT-1000 (DIN/IEC 751 Class A) for temperature measurements in °C or °F

Temperature Probe Specification

PT-100

Operating range:	-50 ºC to +200 ºC
Accuracy:	± 0.23 ºF @ 212 ºF (0.13 ºC @ 100 ºC) ± 0.18 ºF @ 32 ºF (0.1 ºC @ 0 ºC) ± 0.36 ºF @ 212 ºF (0.2 ºC @ 100 ºC)

PT-1000

Operating range:	-50 ºC to +200 ºC
Accuracy:	0.3 ºC (0.5 ºF)

Barometric pressure

DPM4 Model 2G or 2H

	It is possible to compensate for the sea level and calibrate for offsets.
Operating range:	380 mmHg to 825 mmHg
Accuracy:	2 % of reading ±1LSD
Resolution:	0.1 mmHg
Units of measure:	mmHg, mBar, inHg and hPa

Gas Flow

DPM4 Model 2G or 2H

	Measures with an embedded sensor with 11 calibration points to compensate nonlinearity. Calibration constants stored in firmware.
Operating range:	-750 to 750 ml/min
Accuracy:	1% of range or 5% of reading, whichever is greatest
Resolution:	0.1 ml/min
Compatibility:	Gas: Air, N2, O2, CO, NO, CO2, N2O, and NO2
Units of measure:	ml/min (or SCCM - Standard Cubic Centimeters per Minute)

Relative Humidity

DPM4 Model 2G or 2H

	An integrated sensor in the instrument determines relative humidity measurements.
Operating range:	12 % to 95 % RH
Accuracy:	3.5 % of reading ± 2 % RH @ 25 ºC for RH between 12 % and 95 % RH
Resolution:	0.1% RH
Gas compatibility:	Air
Units of measure:	% RH

General Information

Temperature Requirements:	15°C to 35°C when operating 0°C to 50°C in storage
Display/Control:	LCD graphic display, 128 x 32 pixel
Data Input/Outputs (1):	Bi-directional RS-232C for Computer control
Power:	9 Volt Alkaline Battery RG9 or Battery eliminator
Case:	ABS plastic case
Weight:	0.4 kg / 0.9 lbs. with battery
Dimensions:	D x W x H:
	34 mm x 94 mm x 156 mm
	1.3 in x 3.7 in x 6.1 in

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