ThermoWorks 271-3XX 3001 DRY-WELL PORTABLE MINI HEAT SOURCE User Manual
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2 SAFETY
Operate dry-blocks in an ambient temperature between
+50°F and 86°F (+10 and +30°C) (+15 to +25°C for optimum
accuracy) and humidity between 5 to 95% (non condensing).
Note: High humidity will cause icing of the well when operated
below zero. The fan runs continuously to moderate the
internal unit temperature. Always ensure the air vents and
fan aperture are clear and have at least 6 inches (150mm) of
space between them and any obstructions. NEVER cover the
unit while in operation or operate if the fan stops.
The calibrator can operate at high and low temperatures.
Precautions MUST be taken to prevent personal injury or
damage to surrounding objects. Probes may be hot or cold
when removed from the unit and should be placed on a heat
resistant surface and handled with care. The unit may remain
hot for several minutes after switching off. DO NOT switch off
at temperatures above +212°F (+100°C). Allow to cool before
storage.
Care must be taken when removing probes and inserts from
the units. If the unit is set at a high temperature the inserts
will be very hot and could cause burns to the hands. Please
use the insert removal tool supplied. After removal place hot
probes and inserts only on a suitable heatproof surface.
Only place temperature probes in dry-block holes. These units
are designed to be operated dry. DO NOT introduce any liquid
into any of the dry-block holes.
These dry-blocks are designed to be rugged and durable
but contain electronics. DO NOT operate in dirty, dusty or
very damp environments or near liquids that could present a
hazard from electric shock.
Connect input power lead to only a 110-115V or 230 V, 50-60
Hz (model dependant) grounded AC power supply. The unit
requires up to 200 watts of power.
3000 Series dry-block heat sources are programmed and
calibrated at the factory for optimum performance and should
not need adjusting. If the unit is out of calibration or is in need
of repair please return to the supplier. The dry-block unit
is equipped with an internal electrical fuse. If a fuse blows,
return to the supplier for inspection and repair. THERE ARE
NO USER SERVICEABLE PARTS INSIDE.
3 OPERATION
3.1 Parts and Controls
3.1.1 AC Power
The power cord is clamped through the rear panel of the unit
and is not removable. Plug into a standard 110-115V or 230 V
(model dependant) grounded power outlet socket.
3.1.2 Power Switch
The power switch is located on the rear panel of the unit and
is indicated with a 1 and a 0.
3.1.3 Fan
The internal fan runs continuously when the unit is operating.
This provides cooling for the internal electronic components.
Allow at least 6 inches (150mm) of space in front and behind
the unit and DO NOT obstruct any of the ventilation holes.
3.1.4 Stand
The stand can be folded flat against the under side of the unit
when not in use or if the unit is to be operated in a horizontal
position. It can be swung down and forward until it hits the
stops so that the unit can be used in an inclined position. The
stand was not designed to be a carrying handle and should
NOT be forced past the stops for this purpose.
3.1.5 Dry-Block
The aluminum Dry-Block is located on the right hand side of
the front panel. Dry-Well models have blocks with holes in to
accept temperature probes.
Model3 004: Inserts are available to suit standard probe
diameters. Use the nearest, larger size insert to probe
diameter being checked. The inserts are a close fit in the dry-
block to give good thermal conduction. Keep the inserts clean
and avoid damage by storing carefully. The inserts MUST be
regularly removed and cleaned to ensure they do not seize
in the dry-block. DO NOT introduce any liquids or substance
into the dry-block or inserts as this may result in the inserts
sticking in the dry-block.
3.1.6 Temperature Controller
In normal operating mode the numeric LED display shows the
actual block temperature. A Control Output Indicator light is
located in the top left corner of the display. This indicates the
on/off state of the heater element in the block.