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INZ-TN2ZKJ-E
2. Standard Functions
Output signal holding:
Output signals are held during manual and auto calibrations
by activation of holding (turning "ON" its setting).
The values to be held are the ones just before start calibra-
tion mode.
Indication values will not be held.
Remote output holding:
Output signal is held at the latest value by short-circuiting
the remote output holding input terminals.
Holding is maintained while the terminals are short-cir-
cuited. Indication values will not be held.
Remote range changeover:
Measuring range can be changed according to an external
signal when remote range changeover input is received.
Changeover is effective only when remote range setting is
turned on. In this case, measuring range cannot be
changed manually.
When the contact input terminals for each component are
short-circuited, the first range is selected, and it is changed
over to the second range when the terminals are open.
Range identification signal:
The present measuring range is identified by a contact sig-
nal.
The contact output terminals for each component are short-
circuited when the first range is selected, and when the sec-
ond range is selected, the terminals are open.
Auto calibration:
Auto calibration is carried out periodically at the preset
cycle.
When a standard gas cylinder for calibration and a solenoid
valve for opening/closing the gas flow line are prepared ex-
ternally by the customer, calibration will be carried out with
the solenoid valve drive contacts for zero calibration and
each span calibration turned on/off sequentially at the set
auto calibration timing.
Auto calibration cycle setting:
Auto calibration cycle is set.
Setting is variable within 1 to 99 hours (in increments of
1 hour) or 1 to 40 days (in increments of 1 day).
Gas flow time setting:
The time for flowing each calibration gas in auto calibra-
tion is set.
Settable within 60 to 599 seconds (in increments of 1
second)
Auto calibration remote start:
Auto calibration is carried out only once according to an
external input signal. Calibration sequence is settable in
the same way as the general auto calibration.
Auto calibration is started when a no-voltage rectangular
wave is applied to the auto calibration remote start input
terminals (opened after short-circuiting for 1.5 seconds or
longer).
Auto zero calibration:
Auto zero calibration is carried out periodically at the preset
cycle.
This cycle is independent on “Auto calibration” cycle.
When zero calibration gas and solenoid valve for opening/
closing the calibration gas flow line are prepared externally
by the customer, zero calibration will be carried out with the
solenoid valve drive contact for zero calibration turned on/
off at the set auto zero calibration timing.
Auto zero calibration cycle setting:
Auto zero calibration cycle is set.
Setting is variable within 1 to 99 hours (in increments
of 1 hour) or setting is variable within 1 to 40 days (in
increments of 1 day).
Gas flow time setting:
The timing for flowing zero gas in auto zero calibration
is set. Settable 60 to 599 seconds (in increments of 1
second)
Upper/lower limit alarm:
Alarm contact output turns on when measurement value
is reached to the preset upper or lower limit alarm value.
Contacts close when the instantaneous value of each
component becomes larger than the upper alarm limit
value or smaller than the lower alarm limit value.
Instrument error contact output:
Contacts close at occurrence of analyzer error No. 1, 3 or
10.
Calibration error contact output:
Contacts close at occurrence of manual or auto calibra-
tion error (any of errors No. 4 to 9).
Auto calibration status and maintenance status contact
outputs: Contacts close during auto calibration and
during input of the remote hold signal.
CO concentration peak count alarm:
(added only for CO/O
2
measurement)
Alarm output turns on according to the preset concentra-
tion and count.
Whenever the instantaneous concentration value of CO
exceeds the preset concentration value, count incre-
ments. If the count exceeds the preset value in one hour,
the alarm contacts close.
3. Optical functions
O
2
correction:
Correction of measured NO, SO
2
and CO gas concentra-
tions into values at reference O
2
concentration
Correction formula:
C = –––––––– x Cs
C: Sample gas concentration after O
2
correction
Cs: Measured concentration of sample gas
Os: Measured O
2
concentration
On: Reference O
2
concentration
(value changeable by setting)
* The upper limit value of the fractional part in this cal-
culation is 4.
The result of calculation is indicated and output in an ana-
log output signal.
Average value after O
2
correction and O
2
average value
calculation:
The result of O
2
correction or instantaneous O
2
value can
be output as an average value in the determined period of
time.
Used for averaging is the moving average method in
which sampling is carried out at intervals of 30 seconds.
(Output is updated every 30 seconds. It is the average
value in the determined period of time just before the lat-
est updating.)
Averaging time is settable within 1 to 59 minutes (in incre-
ments of 1 minute) or 1 to 4 hours (in increments of 1
hour).
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