Logger Status LEDs
Red Green Meaning
5 flashes, alternating
with green LED
5 flashes, alternating with
red LED
Logger successfully reset
Flashing, alternating with
green LED, at sample
interval *
Flashing, alternating with red
LED, at sample interval *
Logger awaiting trigger
On Flashing at sample interval * Logger awaiting trigger but one or
more thermocouples is open circuit
Flashing together with
green LED, at sample
interval *
Flashing together with red
LED, at sample interval *
All probes are above trigger
temperature, and thus data-recording
cannot be triggered by rising
temperature (or, if falling trigger is set,
all probes are below trigger point)
Off Flashing at sample interval * Logger acquiring data
Flashes 5 times (once
per second)
Off Connection between communications
lead (attached to an active PC) and
logger has been made
Flashing every second Off Internal error
Flashing every 5
seconds
Off Logger has data in memory which has
not been downloaded
2 quick flashes every
second
Off Logger too hot to start logging (after
pressing Start button)
*
Flashing interval will actually fall in range 1–5 s.
Battery
The logger uses a pack of three rechargeable 1.2 V nickel-metal-hydride
(NiMH) cells. Only battery packs supplied by Datapaq are suitable.
Service life of the rechargeable NiMH battery is about three years or 1,000
charge/discharge cycles. The logger must be returned to Datapaq for battery
replacement.
For subsidiary power, the logger also contains a lithium AA battery. This will
normally last for the life of the logger, but, if replacement is needed, the logger
must be returned to Datapaq.
Battery Life
Battery life (discharge time) of NiMH rechargeable batteries is affected by the
following factors.
DATAPAQ XDL12 Specifications and Operation 13
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