• Compare the pressure values against a calibrated portable standard.
• Clean the barometer enclosure with a soft, lint-free cloth moistened with mild
detergent.
5.6.12 Adding PTB330 to System
Before configuring the new sensor, complete the mechanical installation.
1. In AWS Client, select
Settings > Parameters > Static
.
2. In the
CFG
parameter set, select
PTB330
.
3. To enable the sensor, type
1
in the
Value
field, and select
Save
.
4. Select
Settings > Parameters > Common
, and set the following:
Altitude (m)
The station altitude from mean sea level.
Pressure sensor level (m)
The installation height of the pressure sensor distance from the ground.
5. To activate the new configuration, reset the QML data logger. Select
Maintenance >
Reset > Immediate
.
5.6.13 UHF Radio Modem Maintenance
The UHF radio modem requires no field maintenance.
5.7 WMT700 Maintenance
WMT700 is a very reliable and rugged sensor. Since no moving or consumable parts are
used, only minimal periodic maintenance is required.
Periodic maintenance for WMT700 includes:
• Checking that the transducers are not bent, twisted, or rotated. All transducers must be
parallel to each other. Damaged array may cause inaccurate readings.
• Checking that the transducers have not been scraped or touched with sharp objects.
The silicon rubber coating must be undamaged. If the transducers or the coating is
damaged, send the sensor to Vaisala for repair.
• Verifying functionality by using the optional verifier to check the distance between
transducers.
WMT700 has been calibrated at the factory, and recalibration is not required. Periodic
calibration of WMT700 is not required for technical reasons. However, some quality
management systems may require regular calibration of the measuring instruments. To fulfill
these requirements, it is recommended that you recalibrate the sensor every 24 months. For
more information, contact Vaisala.
If the sensor becomes contaminated, clean the sensor carefully using a soft, lint-free cloth
moistened with mild detergent. Do not use solvents or a pressure washer to clean the
sensor, since they may damage the silicon rubber transducer sleeve.
Chapter 5 – Maintenance
99
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