Teledyne 3060e - Ultra Trace oxygen analyzer - Manual (Page 23)

Teledyne Electronic Technologies
Analytical Instruments
2-13
Operational Operational Operational Operational Operational Theor Theor Theor Theor Theory y y y y Ultra Ultra Ultra Ultra Ultra T T T T Trace Oxyg race Oxyg race Oxyg race Oxyg race Oxygen Anal en Anal en Anal en Anal en Analyz yz yz yz yzer er er er er
lyzer has been zeroed with a gas that contains a significant concen-
tration of O
2
(Figure 2-3).
• 0-1V Range Identifier
This 0 to 1 volt output represents each range with a particular
voltage as shown in Table 2-1.
• Isolated 4-20 mA Signal (Oxygen Measurement)
This is a 4 to 20 mA output representing 0 to 100% of the scale,
with 4 mA equal to 0%, and 20 mA equal to 100% of that range.
This output may also range lower than 4 mA, especially if the
analyzer has been zeroed with a gas that contains a significant
concentration of O
2
(Figure 2-5).
• Isolated 4-20 mA Range Identifier
This 4 to 20 mA output identifies individual ranges with discrete
current output as shown in Table 2-1.
Identifier Identifier
Range Voltage (V) Current (mA)
50 PPB 0.0 4.0
100 PPB 0.2 7.2
1 PPM 0.4 10.4
10 PPM 0.6 13.6
30 PPM 0.8 16.8
Table 2-1. Range Identifier
Figure 2-5. Analog Signal Output Offset
- 1/4
Full Scale
Value
- 1/4
Full
Scale
Value
-0.25
1 V
(0,0) (0,0)
Full
Scale
Full
Scale
20 mA
Voltage (V) Current (I)
O2 O2