20 DF-310E Options
configuration (see Table 1). Battery charging occurs only while the analyzer
is connected to power and the power switch is turned on. The batteries can be
charged while the instrument is not in service by turning off power to the
oxygen sensor. See the Controls Menu as shown in Figure 34. Approximately
12 hours is required to fully charge a battery pack (16 hours if the pump is
running) and several charge and discharge cycles may be required for
optimum battery operation.
During battery operation “BAT” is displayed down the right side of the
display. When the battery power is low, “LOW” is displayed down the right
side of the display. In addition, the analyzer will beep. When the battery is too
low, the analyzer will shut down automatically.
When operating on AC power, and the battery is low, “CHG” is displayed on
the right side of the display. When the battery is fully charged nothing is
displayed down the right side of the display.
Turning off the backlighting conserves battery power.
Analyzer State Length of Time the Battery
will Provide Power
Options and Outputs off, Backlight in Auto Mode 8 hours
Options and Outputs off, Backlight On 4 hours
Pump On, Backlight in Auto Mode 4 hours
Outputs on, Backlight in Auto Mode 6 hours
Table 1: Battery Operation Time
Use only Servomex P/N 16337070 when replacing the NiMH
battery pack.
In the event that the NiMH Battery Option is installed in an
analyzer that also has the Case Purge Option, the NiMH Battery
system must be disabled. This will enable the analyzer to shut down
properly in case the purge gas flow is reduced or lost completely.
5.3 Low Flow Alarm
The optional low flow alarm includes a flow switch that is located in the
enclosure on the right side. It is connected with vinyl tubing to the outlet of
the flowmeter. If enabled, the option sounds an alarm when flow drops below
a factory-set value and the O2 reading is covered by a reverse video block
indicating ALM F FLOW. The switch can also be used with an optional
alarm relay, if enabled. See Figure 7 for examples of various Analyzer
plumbing configurations. The optional low-flow switch is included in
configurations c and d.
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