3 Installation
Model 3000MB
3-6
Teledyne Analytical Instruments
Table 3-1: Analog Concentration Output—Example
Voltage Signal
Current Signal
% O
2
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, a second pair of analog output
terminals are used. They generate a steady preset voltage (or current when
using the current outputs) to represent a particular range. Table 3-2 gives the
range ID output for each analysis range.
Table 3-2: Analog Range ID Output—Example
Range
Voltage (V)
Current (mA)
LO
0.25
8
MED
0.50
12
HI
0.75
16
CAL (0-25%)
1.00
20
3.3.4 Alarm Relays
There are three alarm-circuit connectors on the alarm relays block
(under RELAY OUTPUTS) for making connections to internal alarm relay
contacts. Each provides a set of Form C contacts for each type of alarm.
Each has both normally open and normally closed contact connections. The
contact connections are indicated by diagrams on the rear panel. They are
capable of switching up to 3 amperes at 250 V ac into a resistive load. See
Figure 3-6.
