Omega DL7 User guide

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Series

TEMPERATURE

SENSOR

SECURITY

EYELET

INPUT JACK FOR

INTERFACE CABLE

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SERIAL NO.

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MAGNETIC

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DL7

Differential Pressure Data Logger

Also Measures and Logs Temperature, Self-Powered, 2-Channel, Compact

Monitor and Record low differential pressures and temperature with the Model DL7 Differential Pressure Data Logger. Unit includes an on-board thermistor for ambient temperature measurement. Sampling rates are user selectable from 0.04 s to 8 hrs with First-in first-out or Fill-then-stop sampling options. Loggers can store up to 21,500 readings and operate totally independently from any external power supply with built-in lithium battery. Use Model DL200 Windows®software (sold separately) to quickly program the logger or upload data to a computer. The Series DL7 logger is ideal for monitoring air duct velocity, testing and balancing HVAC systems, or verifying room pressure.

Model DL70 DL71 DL72 DL75 DL710

ACCESSORY DL200, Windows

Pressure Range

±0.5 in w.c. (1.2 mbar) ±1 in w.c. (2.5 mbar) ±2.0 in w.c. (5.0 mbar) ±5 in w.c. (12.4 mbar) ±10 in w.c. (24.9 mbar)

Software and Connecting Cable

SPECIFICATIONS No. of Channels: Two; internal

thermistor, and a differential pressure sensor. Internal Thermistor Range: -40 to 158°F (-40 to 70°C). Compensated Temp Range: 32 to 158°F (0 to 70°C).

Memory Size: 21,500 readings. Accuracy: ±0.05 w.c. (up to 2˝ range)

±0.1 (5˝ and 10˝ range).

Thermal Accuracy: ±0.5% FS. Clock Accuracy: ±2 s/day plus one

sampling interval.

Resolution: ±0.01 in w.c. Internal Thermistor Resolution:

0.7°F (0.4°C), R25 value equal to 10,000Ω [10kΩ @ 25°C (77°F)].

Resolution: 12 bits (1 in 4096). Nonlinearity: ±0.05% FS (BFSL). Hysteresis and Repeatability:

±0.05% FS.

Drift: ±0.5% FS/yr. Sampling Methods: Continuous

(first-in, first-out: not available from 40 ms to 8 s), stop when full (fill-thenstop), or delayed start.

Windows

is a registered trademark of Microsoft Corporation

Sampling Rates: Selectable from 0.04 s to 8 hrs.

Ambient Operating Temperature/RH:

-40 to 158°F (-40 to 70°C), 0 to 95% RH, non-condensing. Connection: Two 1/8˝ ID permanent protective tubing. Computer Requirements: IBM compatible 386 or above and Windows®3.1 or later with 2 MB RAM and 2 MB hard drive disk space, one serial port. Service: Dry air and noncorrosive gases. Max. Pressure Rating: 4X rated pressure. Power Requirements: 3.6 V TL5134 lithium metal battery, internal, factory replaceable.

Power Consumption: 5-10 µA. Housing Material: Polyphenylene

ether and polystyrene PPE & PS.

Weight: 4 oz (110 g). Agency Approvals: CE.