SPM-32A ... SPM-36A 3.2 Power supplies
3-3
• Even if you only intend to operate the instrument from the
a.c. line power supply, batteries or NiMHs should be fitted
to prevent loss of stored data in the event of a power
supply failure.
If no batteries are fitted, or if the batteries are flat, the
"BATTERY?" warning message will be displayed even if the
instrument is connected to the a.c. adapter/charger (see
section “Low batteries“).
• The auto-off circuit which normally operates after 15
minutes when batteries are used is disabled when
theinstrument is operated from an a.c. adapter/charger.
(see section 3.3 on page 3-10).
3.2.2 Battery power
Two 9 V dry batteries or two rechargeable batteries are
required. The following are suitable:
– Manganese/alkaline batteries (IEC 6LF22 or 6LR61);
these give an operating time of about 8 hours, or
– Rechargeable NiMH batteries (same size as 6LF22);
these give an operating time of about 2 hours.
Acterna supply suitable rechargeable batteries, see
accessories (Specifications).
Fig. 3-2 Terminals of 9 V rechargeable battery with charger contact
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