Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 119)

IM 11M13A01-02E 8-2
Setting example 2
If the setting (for a 4 mA current) is 75% O
2
, you must set the oxygen concentration for
the maximum (20 mA) point at more than 98% O
2
(75
ϫ 1.3). (Numbers after the
decimal point are rounded up.)
5
15
25
35
45
55
65
75
85
95
5 15 25 35 45 55 65 75
Minimum oxygen concentration, %O 2 (for a minimum current of 4 mA)
Maximum oxygen concentration, %O
2
(for a maximum current of 20 mA)
Ranges over which oxygen
concentrations can be set
Outside ranges
F8.0E.EPS
8.1.3 Entering Output Damping Constants
If a measured value which is adversely affected by rapid changes in the measurement-
gas oxygen concentration is used as the basis for control, frequent on-off actions of the
output may result. To avoid this, the converter allows the setting of output damping
constants ranging from 0 to 255 seconds. Select the appropriate output damping constant
from the numeric-data entry display. To set 30 seconds, enter 030.
8.1.4 Selection of Output Mode
You can select linear or logarithmic output mode. The former provides a linear relation-
ship between the analog output signal and oxygen concentration. The latter provides
logarithmic characteristic. Press the [Enter] key in the output mode display. A linear/
logarithmic selection display then appears. Select the desired mode.
CAUTION
• When you select logarithmic mode, the minimum output remains constant at 0.1% O
2
,
and the minimum oxygen concentration value remains unchanged.