Teledyne 2000A-EU - General purpose thermal conductivity analyzer User Manual
Page 28
Teledyne Analytical Instruments
3 Installation
Model 2000A-EU
3-6
The signal output for concentration is linear over the currently se-
lected analysis range. For example, if the analyzer is set on a range that
was defined as 0–10 % hydrogen, then the output would be as shown in
Table 3-2.
Table 3-2: Analog Concentration Output—Example
Percent
Voltage Signal
Current Signal
Hydrogen
Output (V dc)
Output (mA dc)
0
0.0
4.0
1
0.1
5.6
2
0.2
7.2
3
0.3
8.8
4
0.4
10.4
5
0.5
12.0
6
0.6
13.6
7
0.7
15.2
8
0.8
16.8
9
0.9
18.4
10
1.0
20.0
To provide an indication of the range, the Range ID analog outputs
are used. They generate a steady preset voltage (or current when using the
current outputs) to represent a particular range. Table 3-3 gives the range
ID output for each analysis range.
Table 3-3: Analog Range ID Output—Example
Range
Voltage (V)
Current (mA) Application
Range 1
0.25
8
0-1 % H
2
in N
Range 2
0.50
12
0-10 % H
2
in N
Range 3
0.75
16
0-1 % H
2
in Air
Range 4 (Cal)
1.00
20
0-1 % H
2
in N
3.3.3.2
Alarm Relays
The nine alarm-circuit connector pins connect to the internal alarm
relay contacts. Each set of three pins provides one set of Form C relay
contacts. Each relay has both normally open and normally closed contact
connections. The contact connections are shown in Table 3-4. They are