Campbell Scientific CR23X Micrologger - Manual (Page 10)

viii
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
±
8 V will cause errors and
possible overranging on other analog input
channels.
2. Do not download an operating system (OS)
written for a particular datalogger model into
the hardware of another datalogger model.
The datalogger will sustain damage and
must be returned to the factory for repair.
This is of concern only when updated
operating systems are purchased from
Campbell Scientific.
3. When using the CR23X with the
rechargeable battery option, remember that
the sealed lead acid batteries are
permanently damaged if deep discharged.
The cells are rated at a 7 Ahr capacity but
experience a slow discharge even in
storage. It is advisable to maintain a
continuous charge on the battery, whether
in operation or storage (Section 14).
4. When connecting external power to the
CR23X, first, remove the green power
connector from the CR23X panel. Then
insert the positive 12 V lead into the right-
most terminal of the green connector. Next,
insert the ground lead to the left terminal.
Double check polarity before plugging the
green connector into the panel.
5. Voltages in excess of 5 volts should not be
applied to a control port.
6. The CR23X contains desiccant to protect
against excess humidity. To reduce vapor
transfer into the ENC 12/14 or ENC 16/18
enclosure, plug the cable entry conduit with
Duct Seal, a putty-type sealant available at
most electrical supply houses. DO NOT
totally seal enclosures equipped with lead
acid batteries. Hydrogen concentration may
build up to explosive levels.