Oxigraf O2iM NEMA 4X Oxygen Analyzer
February 13, 2007 08-0427-B0, Manual, O2iM.doc Page 15
calibration cycle. A cal gas with an O2 concentration equal to the cal point value should be flowing
through the analyzer.
4.3.5 Gas Sampling - FLOW Key
Press the FLOW key to display the measured sample flow rate and pump drive level. If the autocal
feature is enabled, pressing the FLOW key again will turn on the low cal gas valve and display the
cal gas flow rate and pump drive level. The high cal gas flow and pump level will be displayed if the
key is pressed a third time.
While in FLOW mode press the SETUP key to modify the flow rate, set the pump mode, and to set
up the sample line purge option, if installed. Ordinarily the pump runs continuously under closed
loop control to maintain the sample flow at the desired setpoint. Special applications may require that
the pump be permanently turned off. Setting the flow setpoint to zero disables pump drive. Note that
the Pump Mode function in the Setup menu is for testing only and its setting is not saved in
nonvolatile memory.
4.3.6 Alarm Status Mode – ALARM Key
Press the ALARM key to display the current state of the optional alarm relay outputs. Each press of
the ALARM key shows the on/off status of the next relay. The BACK key can be used to cycle
backwards through the relay list. Pressing the SETUP key while in this state will vector to the start
of the alarm threshold setup list for the various alarm conditions.
Relay Normal Mode Channel Relay Mode
Horn/Strobe
On when limit and warning conditions specified by the Horn/Strobe setup
are true.
System OK
On when self test is good and
absorption line lock achieved.
On when a channel 1 alarm state is
active
Warning
On when warning status is active
for low supply voltage, low sample
flow, high pump drive, high or low
cell pressure, or absorption over
range.
On when a channel 2 alarm state is
active
Limit A
On when O2 is greater than High
Threshold A or lower than Low
Threshold A. Disabled when both
limit values set to zero.
On when a channel 3 alarm state is
active
Limit B
On when O2 is greater than High
Threshold B or lower than Low
Threshold B. Disabled when both
limit values set to zero.
On when a channel 4 alarm state is
active
If the multipoint option is installed and the relays are configured in "Channel Relay" mode then the
right column above indicates the relay state.
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