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C
R
O
HART
ECORDER
Warning
The chart recorder battery backup
feature does not supply the refriger-
ation system with required power for
continuous operation. Precautions
should be taken to prevent any sam-
ple loss.
Warning
DO NOT ATTEMPT to make relay con-
nections while the unit is connected to
the main AC power supply. To avoid
the risk of possible electric shock,
unplug or disconnect the unit from the
main power supply before attempting
to access the alarm cable assembly.
Disconnect the 9 Volt battery to avoid
damaging the recorder and draining
the battery.
18
M
PERATION AND
AINTENANCE
The LED will flash the appropriate number of times to
show the chart rotation speed that is selected. To perma-
nently save the chart rotation speed that has been select-
ed, press and release the "chart change" button (#3) and
the recorder will resume normal operation.
Battery Back-Up
The LED remains a constant green color indicating that
both the battery and the main power to the unit are good.
Refer to Figure 7 for the location of the LED. If the AC
power were to fail or the battery becomes weak, then the
LED will begin "flashing" indicating that either you have
lost the main power to the unit or it is time to replace the
battery. Having a 9 volt DC battery back-up in place will
allow the recorder to continue to function normally for
approximately 24 hours in the event of a power failure.
(Alarming units will drain battery much quicker).
Battery Location and
Replacement
To replace the battery, first open the recorder case door.
The battery will be located in the upper right hand corner
of the unit. Remove the battery from the holder clips.
Disconnect the battery strap. Install a NEW 9 volt alkaline
replacement battery.
Optional Alarm/Control Relay
(For all models equipped with panel mounted chart
recorder with alarm feature)
Connection to the Relay
Recorders with the optional alarm relays provide two out-
puts. First a built in audible 85 db alarm. Second a cable
to connect to a set of NO/NC relay contacts for connect-
ing to a central system. Proper maintenance/electrician
should be consulted to connect these contacts.
The toggle switch mounted on the chart plate turns the
alarm on or off. Toggle the switch up to turn alarms on.
Toggle the switch down to turn the alarms off.
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