Tektronix 222 Operator's Manual page 125

Performance Specifications-222 DSO Operators
Either Power Pin-to-EXT
TRIG COMM or RS-232
COMM -0.5 V to
+
42 V peak.1
Current
1 ampere maximum when charging batteries1
Maximum Power Consumption
15 watts or 16 volt-amperes (when charging batteries).l
8.3.7 Internal Batteries
Battery
Sealed, lead-acid battery.'
Charge Time
Three hours for full charge with oscilloscope not operating.1
Battery Excessive Discharge Protection
Instrument operation is automatically interrupted when battery
charge drops to 7.32 V.l
Typical Operating Time
Two hours at maximum sample rate, no trigger, and auto timeout
defeated.1
Battery Capacity versus Temperature
Performance Requirement not checked in manual.
REV JUN 1989