DM4 Dual Digital Micro-Manometer

measures two pressures from -3.0 "wc (750 Pa) to +2.2 "wc (548 Pa)
with a resolution of 0.001 "wc or 0.1 Pa
and an accuracy of 1% of the measurement.

The DM4 is a portable dual digital micro-manometer with the
easy-to-use 0.001 "wc or 0.1 Pa resolution. It is calibrated for
blower doors, duct leakage testers and Pitot tube measurements.
(click on thumbnail below for larger image)

Calibrated for Infiltec E3 blower door flow and leakage area,

calibrated for Minneapolis Model 3 blower door flow and leakage area,

calibrated for Pitot tube air velocity,

calibrated for Infiltec DL1 duct leakage flow and leakage area, and

calibrated for Infiltec mobile fans for testing the leakage of large buildings.

Other Uses:

HVAC test and balance,

Data logging pressure and flow,

Radon mitigation,

Furnace draft analysis,

Duct leakage testing,

Pressure balancing,

Combustion safety analysis,

Advanced building diagnostics,

Laboratory safety monitoring,

Process monitoring,

Filter condition checks,

Environmental assessments, and

Orifice pressure measurements.

	The DM4 is a portable dual digital micro-manometer with the easy-to-use 0.001 "wc or 0.1 Pa resolution. It is calibrated for blower doors, duct leakage testers and Pitot tube measurements. (click on thumbnail below for larger image) Calibrated for Infiltec E3 blower door flow and leakage area, calibrated for Minneapolis Model 3 blower door flow and leakage area, calibrated for Pitot tube air velocity, calibrated for Infiltec DL1 duct leakage flow and leakage area, and calibrated for Infiltec mobile fans for testing the leakage of large buildings. Other Uses: HVAC test and balance, Data logging pressure and flow, Radon mitigation, Furnace draft analysis, Duct leakage testing, Pressure balancing, Combustion safety analysis, Advanced building diagnostics, Laboratory safety monitoring, Process monitoring, Filter condition checks, Environmental assessments, and Orifice pressure measurements.

DM4 Dual Digital Micro-Manometer Specifications

Feature	Specifications
Sensors:	2 independent differential pressure transducers with auto zeroing
Pressure Resolution:	Display resolution is 0.1 Pa from -750.0 Pa to +548.0 Pa or 0.001 "wc from -3.000 "wc to +2.200 "wc. Internal resolution is 1/40 Pa or 0.0001 "wc and this is the resolution of the serial output.
Pressure Range:	Bi-directional: -3.0 "wc (750 Pa) to +2.2 "wc (548 Pa). For higher pressures, see the Infiltec DM5.
Keys:	7 function selection keys.
- Device Key:	Select: Manometer, Pitot tube, E3 blower door, DL1 duct tester devices.
- Units Key:	Dual Manometer: Metric (Pa, Pa), U.S. ("wc, "wc), Mixed ("wc, Pa) Pitot flow: Metric (Pa, m/s), U.S. ("wc, f/m), Mixed (Pa, fpm) Infiltec E3 blower door flow: Metric (Pa, m³/h), U.S. ("wc, cfm), Mixed (Pa, cfm) Infiltec E3 blower door ELA (leakage area): Metric (Pa, cm²), U.S. ("wc, in²), Mixed (Pa, in²) Minneapolis Model 3 blower door flow: Metric (Pa, m³/h), U.S. ("wc, cfm), Mixed (Pa, cfm) Minneapolis Model 3 blower door ELA (leakage area): Metric (Pa, cm²), U.S. ("wc, in²), Mixed (Pa, in²) Infiltec DL1 duct tester flow: Metric (Pa, m³/h), U.S. ("wc, cfm), Mixed (Pa, cfm) Infiltec DL1 duct tester ELA (leakage area): Metric (Pa, cm²), U.S. ("wc, in²), Mixed (Pa, in²).
- Time Avg Key:	Select block average of 1 (default), 2, 4, 8, 16, 32 or 64 seconds.
- Low Flow Key:	Dual Manometer: no function Pitot tube flow: no function Infiltec E3 blower door low flow plate: Off, CRF (Can't reach 50 Pa), 7 holes open, 5 open, 3 open, 2 open, 1 open Minneapolis Model 3 blower door low flow rings: Off, CRF (Can't reach 50 Pa), A Ring, B Ring, C Ring Infiltec DL1 duct tester orifice tubes: Off, 16 cm² tube on, 4 cm² tube on, 1 cm² tube on
- Baseline Key:	Resets the zero building pressure for Infiltec E3 or Minneapolis Model 3 blower door calculations.
- Hold Key:	Holds reading on display until pressed again.
- On/Off Key:	Turn power on and off.
Accuracy:	Dual Pressure: ±1% of display measurement or ±1 digit, whichever is greater. Pitot Flow: ±1.5% of measurement or better from 800-6900 fpm (4-35 m/s) Infiltec E3 blower door flow or ELA: ±1.5% of measurement or better Minneapolis Model 3 blower door flow or ELA: ±1.5% of measurement or better Infiltec DL1 duct leakage flow or ELA: ±1.5% of measurement or better
Display Type:	2x16 high contrast LCD with numbers and characters.
Operating Temperature:	32°F to 122°F. (0°C to 50°C)
Storage Temperature:	-4°F to 160°F. (-20°C to 70°C)
Maximum Pressure:	±25 "wc, ±6 kPa or ±0.9 PSI
Low Battery Display:	Current battery voltage is displayed at startup, "lowbat" displayed when voltage is under 7 volts.
Over Range Indicator:	!!MAX!! displayed when pressure is beyond range -3.0 "wc (750 Pa) to +2.2 "wc (548 Pa).
Auto Zero:	Pneumatic switches update zero pressure estimates every 8 seconds.
Weight With Battery:	~16 oz. (~455 grams)
Dimensions:	4.0"x7.5"x1.79" (101.6x190.5x45.4 mm).
Battery Life:	Over 100 hours from six AA alkaline batteries.
Operating Medium:	Air or non-corrosive, non-explosive gas.
Pressure Connections:	Two pairs, barbed for 1/8" ID tubing.
Serial Output:	9600-8N0 pseudo RS232 ASCII records at 1 Hz with LF+CR termination ±32767 range, 1/40 Pa resolution, comma separates two channel values
Microprocessor:	Programmable 4 Mhz Microchip PIC14000 with 16 bit a/d. DM4 functions can be updated by replacing this chip.
Custom Firmware:	Custom microprocessor programming is available to optimize the DM4 for your pressure/flow/ELA measurement application.
Optional Accessories:	E3 blower door, DL1 duct tester, Pitot tube, serial cable, 110 VAC or 220 VAC power adaptor.
Accessories Included:	Battery, soft carrying case, tubing, calibration certificate, user manual.
Warranty:	2 years coverage on parts and labor to repair any defects.

These specifications were updated on February 22, 2005, and are subject to change without notice.

For current DM4 prices, see the Infiltec Radon or Blower Door catalogs, or call toll free (888) 349-7236.

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