D11-044-1: Rapidox 1100ZR-H-OL-LC O
2
Analyser Instruction Manual
D11-044-1
15
Last printed 08/11/2016 12:10:00
O
2
Analogue Outputs
Description
Explanation
Alarms
(3)
Current
(1)
(4-20mA)
Voltage
(2)
(0-10V)
1mA
0.625V
Fault
There is a sensor fault on the oxygen
sensor, and/or the temperature sensor
has a fault condition, and/or the
pressure mode is set to automatic
(pressure compensation active) and
the pressure sensor has a fault
condition.
De-activated
2mA
1.25V
Start up
The analyser is still initialising.
De-activated
2.5mA
1.5625V
Sensor under range
The sensor reading is under range.
Active
3mA
1.875V
Sensor over range
The sensor reading is over range.
Active
3.5mA
2.1875V
Sensor operating out of
specification
The sensor reading is in range but the
temperature sensor reading is out of
range, and/or the pressure mode is set
to automatic (pressure compensation
active) and the pressure sensor is out
of range.
Active
4 to 20mA
0 to 10V
Normal operating output
The O
2
sensor and associated
(1)
sensor(s) are operating normally and
readings are in range.
Active
Pressure Analogue
Outputs
Description
Explanation
Alarms
(3)
Current
(1)
(4-20mA)
Voltage
(2)
(0-10V)
n/a
0.625V
Fault
The pressure sensor has a fault.
De-activated
n/a
1.25V
Start up
The analyser is still initialising.
De-activated
n/a
1.5625V
Sensor under range
The pressure sensor reading is under
range.
Active
n/a
1.875V
Sensor over range
The pressure sensor reading is over
range.
Active
n/a
0 to 10V
Normal operating output
The pressure sensor is operating
normally and readings are in range.
Active
Table 4: Analogue output settings and alarm status for certain conditions
Notes:
1
The current outputs are active self-powered outputs - they are not loop powered.
2
The voltage (0 to10V) outputs produce non-zero voltages during start-up, fault and over/under range conditions - if
1V to 5V outputs are required, with these conditions indicated by corresponding voltages between 0V and 1V, the
current outputs can be used, with a 250 Ohm load resistor.
3
Alarms are de-activated during start up initialisation, and when a fault condition occurs on the assigned sensor.
4
The pressure sensor does not have a 4-20mA output option on analysers coded “OL”
5.11
The notation used by the display is fully programmable to suit your needs using
the keypad (2) or the software provided (section 6.4). The following options are
available to you:
1.
Oxygen:
The oxygen reading can be displayed in percent (e.g. 20.95%),
ppm (e.g. 0.01ppm) or scientific (e.g. 2.095E+05ppm). If percent is selected
the Rapidox will display oxygen as a percentage down to 0.1% and ppm
below this value. There are also options to display the oxygen reading in
terms of a pressure (units will be the same as the units selected for
pressure) or a nitrogen balance (%N
2
) reading. In this case the reading
displayed is 100-O
2
% =N
2
so for example in air 21% the nitrogen balance
reading will display 79% N
2
. Note that this is NOT an actual nitrogen
reading.