LI-COR LI-7815, Instruction Manual

Page: 26 / 98

Section 2. Getting started
Status codes are additive: if multiple codes are active, the displayed value is the sum
of the codes. For example, a display code of 23 indicates that the instrument is ini-
tializing the start-up mode (16), it has an incomplete scan (4), laser temperature
adjustment is underway (2), and a start frequency adjustment is underway (1). Non-
zero status codes are displayed during warmup and any time the instrument is not in
a normal state. Typically, status codes will be resolved by the instrument. Occa-
sionally, you may need to restart the instrument to resolve the code. If your instru-
ment displays a status code that does not resolve itself for several hours or after
restarting the instrument, contact technical support.
Powering off the instrument
The instrument can be powered off with the power button or through the software
interface. To
Power Off
the instrument with the button, press it three times within 5
seconds. To enter
Sleep Mode
, press the power button twice within 3 seconds. In
sleep mode, the instrument will power off the pump but maintain power to the heat-
ers. Sleep mode is to silence the pumps, if, for example, you want to hear the birds
singing while you walk between measurements. To
Exit Sleep Mode
, press the
power button after waiting at least 5 seconds after the previous press.
Caution: While in sleep mode, the instrument will stop drawing in air, which
may affect the pressure and flow in your air supply system. Do not enter sleep
mode when the air inlet or outlet is subject to positive or negative pressure. Pres-
sures exceeding 110 kPa absolute pressure may damage the instrument.
If a battery becomes depleted during normal operation, the instrument will com-
plete the dry-down cycle before shutting itself down. If the instrument is inad-
vertently powered off and prevented from completing the dry-down cycle (by
removing the batteries and power cable, for example), power it back on and off
again so it can complete the dry-down cycle.
Caution: Failure to complete the dry-down while powering off the instrument
may result in condensation in the optics, which may damage the instrument and
require repairs.
2-10 LI-7815 CO₂/H₂O Gas Analyzer