EC900 Series Operation Manual V4.7
11.0 PROGRAMME CODES
OL This function returns a two digit code to read and set up the alarm configuration.
The left-hand digit sets whether alarms are high or low. See table below.
The right hand digit sets up whether the alarms are latched or unlatched.
With unlatched alarms, the relay and LED will only change over for the duration of the alarm
condition.
For unattended operation it may be required for the operator to know that the analyzer had seen an
alarm condition, even though the measured value was now normal. Latched alarms remain on until
manually or remotely reset. When an alarm is set to Latched the LED will be on when in alarm
condition, should the measured value go into a non-alarm condition, then the LED will flash to show
that it had been in an alarm condition. (Note: the contacts on the relay will remain switched). Simply
pressing the ENTER button will reset the alarm. Also can be remotely reset using a USB Comms
command.
OPHx Where x=1, 2, or 3. The level of oxygen corresponding to the maximum level of the analogue
output may be set in this mode. However, certain restrictions apply to different configurations.
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