Retrotec DM-2 Manual de usuario descargar pdf (Pagina 6)

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©Retrotec Inc. 2012

DM-2 Digital Gauge Basics

The DM-2 is Retrotec’s two channel digital micromanometer, or differential pressure gauge. It

combines simple but comprehensive functionality, with intuitive

controls and setup. The DM-2 is a dual channel digital gauge that

always displays a pressure on Channel A, but will display either

measured pressure on Channel B, or calculate flow, air changes per

hour, leakage area and display that on Channel B depending on the

Mode selected. To ensure accurate results, the DM-2 takes up to four

pressure readings per second on each channel, and updates the

information displayed on the screen every second.

1.1 Gauge Overview

The Retrotec DM-2 mark II gauge has: a connections panel, a display

screen, and a keypad. The connections panel on the back of the gauge is where all external devices are

connected to the DM-2. The display provides information on the current test mode and/or setup, as

well as the device status and measurement values. The keypad is where the user inputs data to the

DM-2, and operates the DM-2 functions.

1.1.1 The Connections Panel

Figure 1: DM-2 back panel with pressure ports and electrical connections

Electronic function:

1. Control fan speed. (NOT for Internet

connection)

2. Mini USB connection to a PC

3. Reset button

4. Battery charger input

Pressure Ports:

5. Input B (+)

6. Reference B (-)

7. Reference A (-)

8. Input A (+)

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Retrotec DM-2 Manual de usuario Pagina 6