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5.
Maintenance and calibration
5.1
Maintenance
There is no specific maintenance or adjustment required other inspection of
the battery compartment to ensure no corrosion due to battery leakage is
present and battery replacement when necessary.
Batteries
Most transmitters are supplied with a pack of 4 or 6 low cost AA LR6 primary
cells
–
that is non rechargeable. These should be replaced when the LCD
battery gauge (if fitted) is flashing. The battery voltage can be interrogated
using RxConfig software but is not available on the ModBus output. Failure
to replace exhausted cells can lead to leakage and corrosion which can
damage the transmitter circuity and enclosure.
Always replace with high quality LR6 batteries e.g. GP®Super. It is good
practice to replace the battery cassette or holder, this is available at low cost
from Eltek direct or an authorised distributor.
Mandatory battery change at the time of calibration can be cost effective.
The battery chemistry for devices that are AC powered with built in back-up
batteries (e.g. RX250AL, GD47, GW47 and RP250GD) is NiMh and should be
reliable for many years. It is suggested that they are replaced after 5 years.
5.2
Calibration
Calibration of your wireless telemetric system is essential to maintain accurate
and reliable readings. We recommend annual on-site calibration of RH,
temperature, Lux, and UV. Equipment can be returned to an accredited Eltek
distributor or direct to Eltek for transmitters with built in CO2 sensors.
Transmitters that include RH and temperature are best calibrated using the
sensor exchange procedure. Calibrated digital RH and temp sensors are plug-
in. The original sensor should then be disposed of responsibly or returned to
UK for safe disposal. Alternatively Eltek can test the returned sensor and issue
a report for your audit purposes. This service is chargeable.
Transmitters with Lux or Lux and UV sensors are digital devices and can be
checked against a known light source and calibrated meter. Alternatively they
can be returned to Eltek for calibration. There is a charge for this service.
