Operator`s manual

vi
CAUTIONARY NOTES
1. Damage will occur to the analog input
circuitry if voltages in excess of ±16 V are
applied for a sustained period. Voltages in
excess of ±8V will cause errors and
possible overranging on other analog input
channels.
2. There are frequent references in this
manual to Storage Modules. The Storage
Modules referred to are the SM192 and
SM716. The old SM16 and SM64 Storage
Modules cannot perform many of the
functions available with the SM192 and
SM716.
3. The sealed lead acid batteries used with the
21XL are permanently damaged if
discharged below 11.76 V. The cells are
rated at a 2.5 Ahr capacity but experience a
slow discharge even in storage. It is
advisable to maintain a continuous charge
on the 21XL battery pack, whether in
operation or storage (Section 14).