4 System Overview
12
1 Air supply control elements: primary dilution air feed and secondary dilution
2
Evaporation Tube control elements (conditioner parameters)
3
Remote control LED green: remote dark: local
4
Secondary dilution air supply ON/OFF switch
5
Sec. dil. air supply LED
green: OK
red:
flow error dark: OFF
6
testo MD19-3E air supply ON/OFF switch
7
testo MD19-3E air supply LED
green: OK
red:
flow error dark: OFF
8
10 turn potentiometer for secondary dilution air supply setting
9
High excess gas flow LED
yellow: excess gas flow
>
1.5
l/min
10 Sufficient excess gas flow LED
green: excess gas flow
=
0.3...1.5
l/min
11 Low excess gas flow LED
red:
excess gas is critically low: <
0.3
l/min
12 Excess measuring gas output
13 Quick coupling for measuring gas output to sensor(s)
14 Heating current too high LED
red:
current too high (short circuit)
15 Heating current OK LED
green: current within range
16 Heating current too low LED red:
current too low (interrupt)
17 Evaporation tube heating ON/OFF swich
18 Actual evaporation tube temperature (red)
19 Evaporation tube temperature setpoint (green)
20 Temperature controller status field
21 Temperature controller control field
4.5.3.
Gas Connectors
The excess gas port 12) and measuring gas port 13) of testo ASET15-1 can be connected to an
offtake and to the subsequent sensor(s) using the connectors shown in Fig. 4.4.
Fig.4.4 : excess and measuring gas connectors
22 Female gas coupling for connecting a 6
mm ID tube to excess gas port
23 Male gas plug for connecting a 6
mm ID tube to measuring gas port
(delivered with testo MD19-3E Rotating Disk Diluter)
Connecting any device to the front aerosol output of the testo MD19-3E would affect the flows
inside and therewith the dilution properties of the system. The testo MD19-3E is internally
connected to the testo ASET15-1 and no additional connection is needed. The gas plug 23) out
of the testo MD19-3E delivery is used to connect any measuring instrumentation to the testo
ASET15-1.
