Retrotech DM-2A 用户手册
Retrotec Energy Innovations, Ltd.
27
DM-2A Mark II 2008-02-22
Section 4
Exploring Basic Test Operations
Now that your DM-2A mark II gauge and fan are properly connected you’re ready to begin
taking measurements. A good place to start is to conduct a simple pressure-pressure test. Doing
this, you’ll learn how to turn on the gauge, choose a Mode, activate Time Average and Auto Zero
features, and control fan speed and pressure using Set Speed, Set Pressure, and Jog/Hold.
this, you’ll learn how to turn on the gauge, choose a Mode, activate Time Average and Auto Zero
features, and control fan speed and pressure using Set Speed, Set Pressure, and Jog/Hold.
Follow these steps as a practical example:
1. With your DM-2A mark II gauge and testing device properly connected, turn on
your gauge by pressing the O
n
/O
ff
keypad button once to display the Retrotec
introduction screen and press any keypad button to proceed to the main operational
screen.
screen.
The procedure involved in each of the following steps applies to a typically configured
gauge. If your gauge has been configured differently, the specific information discussed in
these steps may differ from your current setup.
these steps may differ from your current setup.
Setting the Mode
2. Press the M
Ode
keypad button to cycle through the enabled modes until the display
screen indicates two pressure readings—PrA and PrB (as shown next). Notice the
pressure readings on the gauge fluctuate slightly. This is due to minute pressure
changes in the room or enclosure that the gauge is currently measuring. Since the
DM-2A mark II takes pressure readings 20 times per second, the readings can change
rapidly.
pressure readings on the gauge fluctuate slightly. This is due to minute pressure
changes in the room or enclosure that the gauge is currently measuring. Since the
DM-2A mark II takes pressure readings 20 times per second, the readings can change
rapidly.
DM-2A Mark II Dual-Channel Pressure Gauge
User Manual
4:
Basic Operations