Kipp & Zonen LAS, Instruction Manual

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The RF telemetry link can also be verified by looking at the LAS / XLAS channels on the
display of the COMBILOG. If the LAS channels say ‘ no answer ’ the RF link is not working. If
this is case check:
•
The connectors and antenna cables (also at LAS receiver site). Verify that all connectors
have no water leakages (if necessary use ‘self-amalgamating’ tape to make the
connectors waterproof) and check the condition of the antenna cables (damages).
•
Check the condition and orientation of the antennas. Note that the antennas are
directional antennas, which means that a slight miss-alignment of the antenna can
lead to communication failure!
•
Intensive rainfall, fog or high objects (trees, in particularly when the leaves are wet),
commercial communication towers can also disturb the communication link.
•
Check the power source of the RF-modem. No power means no RF-communication. In
necessary replace broken fuses (and solve short-circuit problems) (see Figure 38).
5. Clean sensors, check signal/power cables and connectors
Check the physical condition of all sensors to prevent malfunctioning (radiation sensor, wind
direction, wind speed, air temperature, relative humidity). If necessary, clean sensors and
remove any dirt (e.g. dust, spider webs and droppings). Check the condition of all cables and
wires (also inside the stainless steel housing), including the various connections (over voltage
protection and data logger. Finally check the leveling of the radiation sensor and the mast (see
next step).
6. Check the condition of the tower, guys, spanner and anchoring
Important:
The wire tension has to be moderate and equal. By no means bending forces are
allowed to be applied to the mast!
Important: It is very important to check the anchoring for correct and tight position,
frequently. Especially after high wind speeds occurred. If the soil seems not to be tight
enough to keep the loads, the anchoring has to be replaced by concrete foundations. If
the load lengthens the wires, their length has to be readjusted. The wire condition has to
be checked frequently. Damaged wires have to be replaced at once!
7. Download the data from the COMBILOG: a) replace the PCMCIA Flash Card b) connect a
computer to the RS-232 interface of the COMBILOG.
a) For replacing the PCMCIA Flash Card proceed as follows:
•
Remove the ‘full’ PCMCIA card from the COMBILOG
•
Insert the new PCMCIA card in the COMBILOG
When the display shows: “
FLASH card not empty ”
•
Rotate the press/rotary knob on the data logger, “ FLASH card: Append data? ” or
“ FLASH card: Delete Card? ” will appear. Select “ FLASH Card: Delete card? ” and
press the knob briefly to confirm, the FLASH card will be deleted and new data (plus
header) will be stored in the empty FLASH card (this will take about 16 seconds).
When nothing happens:
•
First, enable the press/rotary knob of the data logger.