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MAINTENANCE
Wet Bulb
Operation of the Wet Bulb with a fouled wick (e.g. discolored, stiff or will not wet) may lead to errant (high) readings.
Wick Replacement
To replace a fouled wick, pull it and its sponge straight upward over the sensor. Slide a new proper fitting 3M wick over the sensor such that it is snug over the tip and
reaches the bottom of the reservoir. To prevent water spillage, a snug fitting 3M sponge should be placed over the wick encased sensor and positioned in the mouth of the
reservoir. Dampening the sponge and wick facilitates removal and replacement.
Water Treatment
For maximum accuracy and extended wick life, distilled water should be used (available from most pharmacies). Alternately, demineralized tap water may be used. Be sure
to follow instructions supplied with the demineralizer carefully.
Cleaning
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the surfaces and damage the display window,
labels, or monitor housing.
To clean external surfaces, use a soft wipe/tissue dampened with a mild detergent in warm water solution.
Storage
Remove each sensor by pulling straight up (DO NOT TWIST) on its connector collar. Empty the Wet Bulb reservoir and squeeze excess water from its sponge. Return all
items to their proper location in the carrying case.
BATTERY
CAUTION
Observe proper polarity when inserting the battery. Polarity is marked on the inside of the battery compartment.
This instrument may contain a nickel metal hydride (NiMH) battery. Dispose of battery in accordance with local regulations.
The WIBGET monitor is powered by a rechargeable 9v (8.4v) Ni-MH battery and comes with an external charger. In addition the WIBGET monitor can operate on a non-
rechargeable 9v alkaline battery or the charger (AC adapter).
Charging
When the battery nears full discharge, “LOBAT” appears in the upper right-hand corner of the display. For continued/continuous operation or to simply recharge the battery,
connect the charger via its receptacle (12vdc) located on the lower left side of the monitor. Recharging requires a minimum of 12 hours. Although Ni-MH batteries may be
recharged many times, they eventually degrade, requiring replacement.
Replacement
With the power ‘OFF’, remove all four screws from the rear case and open the instrument. Noting the battery’s location, replace it. Reinstall the rear case using the reverse process.
CALIBRATION
The WIBGET monitor base unit and all three sensors can be returned to 3M for calibration to NIST standards. A CERTIFICATE OF INSTRUMENT CALIBRATION will be issued
only if the WIBGET base unit along with all three of its sensors have passed calibration. Traceable certification and before/after data can also be provided at an additional
cost. It is recommended that the WIBGET monitor be calibrated yearly.
WARNING
Never alter or modify this instrument. Substitution of components may impair intrinsic safety. Doing so may adversely affect product performance and result in sickness or death.
Repair or replace parts only with the 3M components approved for this unit.
Failure to do so may adversely affect product performance and result in sickness or death.
WARNING
Battery must be replaced in a non-hazardous area only. Battery replacement is not an intrinsically safe operation. Use only approved battery. Failure to do so may
result in sickness or death.
Only charge the instrument in non-hazardous areas using a 3M battery charger (AC adapter). Battery charging and operating with AC adapter is not an intrinsically safe
operation. Do not attempt to charge alkaline batteries. Doing so may adversely affect product performance and result in sickness or death.