Basic Operation; Installing And Using The Batteries - Respironics 920M PLUS Operator's Manual

Basic Operation

Installing and Using the Batteries

The 920M PLUS Handheld Pulse Oximeter can be powered by 4 AA-size
alkaline batteries (which will typically provide 100 hours of continuous
operation), or by the optional Rechargeable NiMH Battery Pack. (See
"Accessories" on page 22.) Respironics does not recommend the use of any other
battery types.
When the batteries are low, the low battery indicator (a yellow LED) will be
steadily illuminated. (See Figure 2 on page 4.) Replace the batteries as soon as
possible. When the batteries are critically low, the low battery indicator will
flash and the pulse oximeter will not operate. The digital displays will go
blank, and the pulse quality indicator will blink yellow or red, but not green.
Replace the batteries immediately.
1. Press the battery cover latch (see Figure 3 on page 5), and remove the
battery cover on the bottom of the 920M PLUS.
2. Insert four new AA-size alkaline batteries or a Rechargeable NiMH
Battery Pack. Be sure to insert the batteries in the correct position, as
indicated by the polarity markings (+ and -) inside the battery
compartment. Refer to Figure 4 on page 8 for an illustration of correct
battery orientation. Proper battery positioning is essential for correct operation.
3. Replace the battery cover and turn on the 920M PLUS. If the unit does
not turn on, see "Troubleshooting Guide" on page 24.
6 Basic Operation