Mindray PM-60 Service Manual

2-7
2.3.2.1 Input
The pulse oximeter runs on a chargeable lithium-ion battery or three alkaline AA size
batteries.
 Lithium-ion battery: voltage 3.7V, capacity 1800mAh;
 Alkaline AA size batteries: three batteries in series, the total voltage 4.5V.
Connect the pulse oximeter to the charger stand and then connect the AC mains. The battery
will be charged automatically if a lithium-ion battery is used. However, if alkaline batteries
are used, the batteries will not be charged.
2.3.2.2 Output
1. SpO2 circuit
3.3V 20mA (Peak 120mA)
±2.5V 10mA
2. Main control circuit
3.1V 5mA (Peak 150mA)
2.5V 50mA (Peak 150mA)
0.9V 20mA (Peak 50mA)
3. LCD backlight and speaker are directly run by the power supply.
2.3.2.3 Power Supply Management
1. Shutdown delay
When the battery voltage is too low, an alarm message “Battery Too Low” is presented
and the pulse oximeter will shut down automatically in maximum 10 minutes.
2. Run time
In the case that SpO
2
is monitored continuously, audio indicators are off and backlight
brightness is set to minimum, the run time of alkaline batteries is 36 hours and
lithium-ion battery 24 hours, using a new, fully charged battery at ambient temperature
25℃.
3. The power supply efficiency is not less than 80 percent.

Mindray PM-60 Specifications

General

Data Storage	Up to 72 hours of trend data
Device Type	Handheld Pulse Oximeter
Display	TFT LCD
Measurement Range	SpO2: 0-100%
Power Supply	AC Adapter