Manual Part Number:
5-06-4900-65-0
Revision Level: A
ECO 8541
File Name: MN-A-0177
Page 20
Analog Voltage & Analog Current Output
The analog voltage and analog current output produce either a voltage or a current output
proportional to the measured oxygen concentration. For the analog voltage, the zero scale is
always 0 volts. The full scale is programmed at the factory to be either 1, 5, or 10 volts. For the
analog current output, the zero-scale output is 4 milliamperes and the full-scale output is 20
milliamperes.
The measurement scale is also preprogrammed at the factory to one of the following:
ANALOG FULL SCALE
1 PERCENT
10 PERCENT
25 PERCENT
AUTO RANGING
When the measurement scale is auto-ranging, the analog output automatically scales to the
smallest relevant measurement range. For example, When the measured oxygen concentration
is 9.9 percent, the analog output will scale to 0
–10 percent. When the measurement increases
to 11 percent, the analog output will rescale to 0-25 percent.
Use the Range ID voltage output to identify the active measurement scale.
Range ID Voltage
The Range ID voltage is used to identify the oxygen concentration at which the analog voltage
and analog current outputs are at their full scale. This information is useful if the analog outputs
are set to auto-ranging.
The following is a list of all possible Range ID voltages. Actual measured voltage may be within
+/- 0.2 volts of indicated voltage.
RANGE ID VOLTAGE
ANALOG FULL SCALE
5.63 VOLTS
1 PERCENT
6.25 VOLTS
10 PERCENT
6.88 VOLTS
25 PERCENT
RS-232 Port
The Model 5124BE-N1-WO Analyzer port will transmit information to a host computer via the RS-
232 port. The information includes the oxygen concentration, fault status and oxygen alarm
status. For more information on the RS-232 communications, see Appendix D.
