Honeywell SPM, Technical Handbook

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SPM Single Point Monitor
SPM Technical Handbook 5-11
the display reads (ERROR), you made an invalid
entry in one of the fields. Repeat steps 3 through
7 to find and correct the error.
8. Close the tape load lever (18) to begin
monitoring.
5.6 Portable Operation
The Portable option of the SPM operates directly from
the battery charger assembly. The Portable SPM should
be connected to an AC power source via its battery
charger at all times to maintain a full charge. When not
in use as a portable monitor, the Portable SPM should
be connected to AC power source via its battery charger
to keep the batteries fully charged. For ease in transport,
the Portable SPM incorporates a carrying handle and
a carrying strap.
5.6.1 Battery Operation
When fully charged, the internal batteries provide up to
eight hours of continuous monitoring, but frequent alarm
conditions or the operations of some options will reduce
operating time under battery power.
The Battery Backup and Portable SPM change to battery
power when disconnected from the charger.
The Battery Backup and Portable SPM automatically
switch to battery backup mode when there is an
interruption on the AC line. When the Battery Backup
SPM changes to battery power, there is no display or
relay signal to report that this condition has occurred.
5.6.2 How to Extend Battery Life
The SPM instrument fault relay is a “fail-safe” relay.
The relay remains asserted until the SPM detects an
instrument fault condition or if the instrument power is
turned off or lost.
To extend battery life, disable the instrument fault relay by
pressing the relay disable key (14). With the instrument
relay disabled, the battery life can be extended from
eight hours up to nine hours.
Note:
If the relays are disabled, the external alarm(s)
will not activate. The relays will also be
disabled if the SPM enters a fault condition or
if power is turned off or lost.
5.6.3 Battery Power Status
The front panel display (19) will show battery condition.
There are three possible messages:
(BATT OK): When the tape load lever (18) is open, this
message reports that the battery voltage is in the normal
range for portable or battery backup operation.
(BATT LOW): This message appears when there is 60
to 90 minutes of running time left on the batteries.
(RECHARGE BATTERY NOW): This message scrolls
across the display when battery power is insufficient
for monitoring. The System LED flashes, the audio
alarm sounds, and the instrument relay de-energizes.
Monitoring stops until the instrument is reconnected to
AC power via the battery charger and the alarm reset
key (11) is pushed.
If the batteries fail to hold a charge, they may need to be
replaced. Replace only with P/N 104403 sealed lead acid
battery, 12 VDC, 2.7 Ah. Two batteries are required.
5.6.4 Battery Charger