9 - 3
INZ-TN4ZAFE-E
Explanation of Functions
Output signal
holding
When holding is set (user setting is turned ON), the latest measured value output just before output
signal holding will be held during manual or automatic calibration, or by remote output holding input.
In this status, indicated values will not be held.
Remote output
holding input
Upon short-circuiting the remote output holding input terminal when holding is set (user setting is
turned ON), the latest measured value output will be held.
Holding continues while the contact input terminal is close-circuited.
In this period, indicated values will not be held.
Remote range
changeover input
When remote range setting is selected (user setting is turned ON) for two rang type, range will be
changed over according to the external signal input (non-voltage contact) applied to the remote range
changeover input terminal.
In this mode, range cannot be changed manually.
When close-circuiting the contact input terminal, the first range is selected, and the second range is
selected at open circuit.
Range identification
signal output
With two rang type, the current measuring range identification is output in contact signal.
The contact output terminal is closed for the first range, and open for the second range.
Upper/lower limit,
upper limit and lower
limit alarm output
Alarm contact output is issued with reference to the set upper/lower limit for alarm. Hysteresis is
settable.
When measuring value exceed alarm setting value, contacts close, and open when not exceeded.
SPST contact
Automatic
calibration
Zero and span calibrations are automatically carried out by outputting the signal for driving the
externally installed solenoid valves for calibration gases at the set start time and interval or through
input of the remote calibration start signal.
• Calibration channel: 1 component
• Calibration accuracy: 0.2% of F.S.
• Zero calibration point settable range: 0 to 100% of F.S.
• Span calibration point settable range: 1 to 100% of F.S.
• Calibration interval settable range: 1 to 99 hours (1 hour step) or 1 to 40 days (1 day step)
• Calibration gas injection time settable range: 60 to 599 sec (in sec)
• Calibration start: Internal timer or remote calibration start input
• Solenoid valve drive signal output: SPST contact (zero x 1, span x 1)
• Suction pump OFF output in calibration: SPST contact (suction pump OFF x 1)
• Remote calibration start input: No-voltage contact input
Automatic calibration is started by applying a non-voltage rectangular wave to the remote calibration
start input terminal (opened after close-circuiting for 1.5 sec or longer).
When contacts open, automatic calibration is carried out once.
• Automatic calibration error alarm output: SPST contact
Contacts close when the quantity of zero or span calibration exceeds 50% of full scale from the level of
previous calibration, and contacts open when there is no abnormalities.
When automatic calibration is abnormal, measurement output depends on the previous calibration
values.
• Automatic calibration status output: SPST contact
During automatic calibration, contacts close, and open when within 50%.
Interference
correction by
interference gas
measured value
input
Correction is made using either CO
2
or CH
4
component for H
2
measurement.
Measured H
2
gas concentration is corrected in response to a concentration change of interference gas
within its concentration range measured and set in advance.
External interference gas measured value input : 1 to 5 V DC, 1range
Interference gas fluctuation range : Reference concentration 20% F.S.
H
2
gas concentration correcting range : Reference concentration 25% F.S.
Correction accuracy : 5% F.S.
(Note 1) Enter in the sample gas component check list on the back cover.
(Note 2) Correction accuracy value is larger when other interference gas is contained in the sample gas.
Analyzer error
When the analyzer or automatic calibration is abnormal, contacts close, and open when normal.
SPST contact
Table 1: Measurable Component and Measurable Range
Measured gas
Reference gas
component (Note 1)
He
Ar
CH
4
CO
2
Measurable range
Range
ratio(Note 2)
0 to 5
,
10
,
20
,
30
,
40
,
50
,
80
,
100%
100 to 90
,
100 to 80%
1 : 10
N
2,
(CO
2,
Ar) O
2,
Air
0 to 10
,
20
,
50
,
80
,
100%
100 to 90
,
100 to 80%
1 : 05
N
2,
O
2,
Air
,
(He)
0 to 20%, 100 to 90% : Linear
Other : Nonlinear
100 to 90% : Linear
Other : Nonlinear
H
2
0 to 3
,
5
,
10
,
20
,
50
,
80
,
100%
100 to 90
,
100 to 80%
1 : 10
N
2,
(CO
2,
Ar
,
He)
100 to 90% : Linear
Other : Nonlinear
0 to 10
,
20
,
50
,
100%
100 to 90
,
80%
1 : 05
N
2,
O
2,
Air
,
(He)
0 to 10, 20% : Linear
Other : Nonlinear
0 to 20
,
40
,
50
,
60
,
80
,
100%
100 to 80%
1 : 05
N
2,
(CO
2,
Ar
,
He)
Nonlinear
Output signal characteristic
without linearization (Note 3)
(Note 1) The parenthesized gases require inquiry.
(Note 2) Range ratio stands for maximum value.
(Note 3) “Linear” indicates an accuracy within 2.5% of full scale.
