Retrotech DM-2A - Manual (Page 18)

10
Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22
a
utO
Z
eRO
Press the a
utO
Z
eRO
keypad button to turn the automatic zeroing
function on or off. Automatic zeroing sets the gauge to automatically zero itself
every 10 seconds. Generally speaking, the DM-2 should be used with auto zero
feature on. However, to save batteries or when conducting high-speed computer
data acquisition you can maximize your gauge performance and data-transfer
rates by turning the Auto Zero feature on at the start of each data acquisition
cycle, but turn it off while the gauge is communicating with the computer.
S
et
p
ReSSuRe
The S
et
p
ReSSuRe
feature enables you to input any desired enclosure
pressure and place the gauge in Set Pressure mode. While in Set Pressure mode,
the gauge will automatically control the fan to achieve your desired enclosure
pressure.
For more information on using the Set Pressure feature, see Setting the Pressure in Section
4, Exploring Basic Test Operations.
J
Og
/H
Old
Pressing J
Og
/H
Old
cycles the gauge to Jog, Hold, or Off. Jog mode
is only available while the gauge is in Set Pressure or Set Speed modes. In Jog
mode, you can incrementally adjust the target fan speed one percent per click
or target enclosure pressure value 5 Pa per click using the (Up) and (Down)
keypad buttons. Hold mode freezes the current values being displayed.
While using Jog mode for Set Pressure, press and hold the (Up) and (Down) keypad
buttons for three seconds to increase the target value by 5 Pa.
S
et
S
peed
This feature enables you to directly set the fan speed. While in Set
Speed mode, the gauge will automatically control the fan to achieve your desired
fan speed.
d
eviCe
Press this keypad button to enable you to cycle through the available fan Press this keypad button to enable you to cycle through the available fan
models. Devices can be enabled and disabled using the Setup menu.
@ p
ReSSuRe
If Set Speed is used, the first @ setting will be the displayed pressure.
If Set Pressure is used, the first @ setting will be the set pressure. The second @
setting will always be the value entered when the gauge is set up and can differ
for each mode.
DM-2A Mark II Dual-Channel Pressure Gauge User Manual
1:
Getting Started