Getting Started - Tektronix 222 Operator's Manual

Section 2-222 DSO Operators Manual
SECTION 2
GETTING STARTED
2.1
SAFETY
Refer to the Operator's Safety Summary (located in front of section 1
of this manual) for safety information about the use of this instrument.
Before connecting the instrument to a power source, read this section
and the Operator's Safety Summary.
2.2 BATTERY-CHARGER ADAPTER
Instruments are shipped with a detachable battery-charger adapter
(wall transformer) that plugs into an ac power-source outlet. The
adapter converts the power-source ac voltage to the 16 to 20 Vac
input voltage needed to operate the instrument (with or without the
battery installed) and charge the oscilloscope's internal battery. Use
the battery-charger adapter to operate the oscilloscope when an ac
line voltage source is available to maintain battery charge for use
when totally portable operation of the oscilloscope is needed. Use
the appropriate battery charger adapter for the available power
source voltage (1 15 Vae and 230 Vac). The adapter plugs into the
instrument's external power receptacle as shown in Figure 2-1. An
optional accessory pouch to carry either the battery-charger adapter
(U.S. model only) or a spare batterymay be ordered (see section 7f0r
the part number). The accessory pouch attaches to the instrument
carrying case.
2.3
EXTERNAL SUPPLY VOLTAGE
The
222
operates on an external supply voltage of either 12 to 28 Vdc
or 16 to 20 Vac (47 to 400 Hz) from a supply that provides at least 15
watts or 16 volt-amperes. If the battery charge state is very low, the
current drawn by a charging battery from the supplied battery-
charger adapter (wall transformer) is current limited, and the crt dis-
play may not be stable. If this effect is seen, either charge the battery
for 1 hour before operating the oscilloscope or operate without the
battery installed until it can be charged.
REV JUN 1989 2-1