ROTRONIC MBW 373 - Manual (Page 35)

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Installation
Facility Requirements
Environmental
Your 373 is a precise laboratory quality instrument. While it does not require any special
environmental control, it works best when the temperature is stable and free of rapid
transitions. For operation, it is best to keep the operating conditions within the following
parameters if possible.
Operating Temperature 15 to 35°C
Operating Humidity 5 to 95%RH non-condensing
Power
373L and LX systems have specific power requirements due to the internal refrigeration
compressors. Power requirements will be identified on the back panel label.
373S, H, and HX systems are equipped with universal power supplies capable of operation
from 100 to 250 VAC at 50 to 60 Hz. However, if these systems are used with external
heated hoses, these hoses must be ordered to match your local power source since they
operate from the line voltage.
Cooling Water
Cooling water is not required for 373L and LX systems since they are equipped with internal
refrigeration systems. The 373S, H, and HX systems are generally equipped with cooling
water connections. However, cooling water is rarely required unless you intend to make dew
or frost point measurement below approximately –40°C. When used, a recirculating water
chiller, or standard tap water, of a temperature between approximately 10 and 20°C may be
used. The water cooling connections are either ¼” or 6 mm Swagelok fittings.
Preparation for Use
Prior to first use, the system should be bench or rack mounted and allowed to rest in its
normal upright position for several hours prior to applying power. This allows the oil within the
compressor of the 373L and LX systems to drain back to its normal location if the system had
inadvertently been tipped during transportation. For the 373S, H, and HX systems, this
upright requirement does not apply since they have no internal components that are position
sensitive.
Benchtop Use
All 373 models are ready for benchtop use. Bench space of at least 24” x 24” (0.6 x 0.6 m) is
recommended.