6
10545100-Australia Rev.
– 08/2018
Description of Unit
The Digital MDM Mixer is shown in Figure 1. The device permits the operator to adjust the percent of oxygen through a
range of 100% to 30% (and thereby control the ratio of oxygen to nitrous oxide). The operator can also control the total
volume of mixed gas up to 9.9 liters per minute.
Mixture Control
The DIGITAL MDM mixer precisely mixes oxygen and nitrous oxide from local cylinders or pipeline gas systems, and
delivers the electronically controlled mixture to the bag tee outlet.
Built-In Safety
A series of alarms (see Safety Alarm System page 7) alert the user to any problem condition within the DIGITAL MDM mixer
unit or in the gas supply.
Displays and Indicators (Figure 1)
Flow Display:
The LPM FLOW display (4) normally displays the total gas flow rate. It also displays the individual nitrous
oxide or oxygen flow rates when either the N
2
O or O
2
flow display controls (6) are pressed. The gas flow being displayed is
indicated in the flow indicator (5) by O
2
, TOTAL or N
2
O.
% OXYGEN Display:
The % OXYGEN display (3) indicates the oxygen concentration set point in the total flow.
Gas Flow Indicators:
Gas flow is indicated by bar graph LEDs (1). A green bar graph represents O
2
while blue represents
the N
2
O flow. The number of lit bars gives a graphical indication of the flow level of a particular gas.
Figure 1:
Digital MDM Mixer Front Panel (figure shows all LEDs illuminated)
