Yokogawa IR400 - Manual (Page 97)

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IM 11G02N01-01E
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 be-
fore start calibration mode or setting value.
It is selectable.
Indication of instantaneous values will not
be held.
Remote output holding:
Output signal is held at the latest value or
setting value by short-circuiting the remote
output holding input terminals.
Holding is maintained while the terminals
are short-circuited.Indication of instanta-
neous values will not be held.
Switch ranges:
The switch ranges is available in manual,
auto, and remote modes. Only preset
switch method is effective.
Manual: Allows range to switch by key operation.
Auto: Allows range to switch from low to high
range when 90%FS or more is available in
the low range.
Allows range to switch from high to low
range when 80%FS or less is available in
the low range.
Remote: No-voltage contact input (for measurable
components)
Allows range to switch via an external sig-
nal when remote range switch input is re-
ceived.
When the contact input terminals for each
component are short-circuited, the first
range is selected, and it is switched to the
second range when the terminals are open.
Range identification signal:
The present measuring range is identified
by a contact signal.
The contact output terminals for each com-
ponent are short-circuited when the first
range is selected, and when the second
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 calibra-
tion and a solenoid valve for opening/clos-
ing the gas flow line are prepared externally
by the customer, calibration will be carried
out with the solenoid valve drive contacts
for zero calibration and each span calibra-
tion 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 calibration is set.
Settable within 60 to 900 seconds (in in-
crements 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 by opening the
auto calibration remote start input termi-
nals after short-circuiting for 1.5 seconds
or longer.
Auto zero calibration:
Auto zero calibration is carried out periodi-
cally at the preset cycle.
This cycle is independent on “Auto
calibradion” 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 car-
ried out with the solenoid valve drive con-
tact 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 900 seconds (in increments
of 1 second)
Upper/lower limit alarm:
Alarm contact output turns on when mea-
surement value reach to the preset high or
low limit alarm value.
Contacts close when the channel value of
each channel becomes larger than the
high alarm limit value or smaller than the
low 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 calibration error (any of errors No. 4
to 9).
Auto calibration status contact outputs:
Contacts close during auto calibration.
Pump ON/OFF contact output:
During measurement, this contact close.
While calibration gas is flowing, this con-
tact open. This contact is connected in
power supply of pump, and stop the
sample gas while calibration gas flowing.