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Radical Signal Extraction Pulse Oximeter Operator’s Manual 53

specifications

ANALOG OUTPUT

Radical can interface with various analog recording devices and/or strip chart recorders

through its Analog Output connector located on the back of the Docking Station. SpO

and

pulse rate parameters are output simultaneously and continuously. The

output signals vary from approximately 0 to 1 volt in a linear fashion.

NOTE: The actual SpO

and Pulse Rate voltages will vary from approximately 40mV to

980mV in 3.9mV steps.

SpO

0 volts represents either 0% SpO

or 50% SpO

. In either case, 1 volt is used to represent

100% SpO

. The range mapping for %SpO

can be selected by accessing the menu

system under Output-Analog Output Mode.

PULSE RATE

For Pulse Rate, 0 volts represents 0 BPM, while 1volt is used to represent 250 BPM.

CALIBRATION

For measurement device calibration purposes, the analog output signals can be set to either

0 volts or 1 volt in the menu system under Output/Analog Output Mode.These settings affect

both channels. Calibrate your analog recording system to those levels before use.

NURSE CALL

The nurse call feature is available when Radical is operating in its standalone configuration.

The nurse call feature on the Radical Pulse Oximeter is based on the relay closing or

opening depending on alarm events. For maximum flexibility, either normally open (pin 6)

or normally closed (pin 7) signals are available. Only qualified personnel should connect

one of these two signals and common (pin 12) to a hospital’s nurse call system. During an

alarm condition, the normally open pin will be connected to the common pin and the

normally closed will be disconnected.

The nurse call relays have the following electrical specifications per switch:

PARAMETER SPECIFICATION

Max Voltage 100VDC or AC

peak

Max Current 100mA

WARNING: THE NURSE CALL FEATURE IS DISABLED WHEN THE AUDIBLE

ALARMS ARE SILENCED.

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