ETI 3000 Series User manual

User Manual
3000 Series
dry-well heat source
models 3001, 3002, 3003 & 3004

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CONTENTS
introduction 4
safety 4
parts & controls 5
power lead 5
power switch 5
fan 5
stand 6
dry-well 6
temperature controller 6
operation 7
dry-well set-up 7
temperature setting 7
probe testing 7
maintenance 8
care of the 3000 series dry-wells 8
guarantee 8
specification 9

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INTRODUCTION
The 3000 Series dry-well heat sources allow users to check the accuracy
of thermometers and sensors as a system, on site, without the need for
heavy, expensive equipment. The dry-wells are high accuracy portable
heat sources that are extremely easy to use. Simply plug in, switch on
and set the dry-well to the temperature that you wish to check, insert
your probe into the correct size well and take the reading. Compare the
temperature reading of your thermometer and probe to the displayed
temperature of the dry-well and the difference is the error of your
instrument. For optimum accuracy and UKAS traceability use an ETI
Reference Thermometer or similar to make comparison measurements.
The 3000 Series dry-wells are controlled by a closed loop microprocessor
based digital PID temperature controller system incorporating a heater
and a precision platinum RTD sensor housed in the aluminium block.
Fan cooling allows rapid changes in well temperature upon demand.
The required temperature may be adjusted in 0.1 °C increments across
the range of the instrument using the buttons on the front panel.
These units are ideal for use in a variety of industrial and process
applications. Each unit is supplied with a traceable certificate of
calibration showing actual test data, which can be used as part of quality
assurance programmes.
SAFETY
Operate dry-wells in an ambient temperature between 10 and 30 °C
(15 to 25 °C for optimum accuracy) and humidity between 5 to 95 %
(non condensing). The fan runs continuously to moderate the internal
unit temperature. Always ensure the air vents and fan aperture are clear
and have at least 150 mm of space between them and any obstructions.
NEVER cover the unit while in operation or operate if the fan stops. If
the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
!The calibrator can operate at very high temperatures. Precautions
MUST be taken to prevent personal injury or damage to
surrounding objects. Probes may be hot when removed from the unit
and should be placed on a heat resistant surface. The unit may remain
hot for several minutes after switching off. DO NOT switch off at
temperatures above 100 °C. Allow to cool before storage.

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!
!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 heat proof surface.
Only place temperature probes in dry-well holes. These units are
designed to be operated dry. DO NOT introduce any liquid into any of
the dry-well holes.
These dry-wells 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 230 volt, 50-60 Hz or 110-115
volt 50-60 Hz (model dependant) grounded AC power supply. The unit
requires up to 200 watts of power. Mains plug fuse rating is 3 amps.
The dry-well 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-wells are 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.
PARTS AND CONTROLS
POWER LEAD
The power lead is clamped through the rear panel of the unit and is
not removable. Plug into a standard 230 volt or 110-115 volt (model
dependant) grounded AC power outlet socket.
POWER SWITCH
The power switch is located on the rear panel of the unit and operation
is indicated with a 1 and a 0.
FAN
The internal fan runs continuously when the unit is operating. This
provides cooling for the internal electronic components. Allow at least
150 mm of space in front and behind the unit and DO NOT obstruct
any of the ventilation holes.

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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.
DRY-WELL
The aluminium dry-well is located on the right hand side of the front
panel. Dry-well models have blocks with holes in to accept temperature
probes.
The 3001 dry-well is designed to accept four different probe sizes: two
Ø3.3, 4.0, 4.76 and 6.35 mm.
The 3002 dry-well is designed to accept four different probe sizes: Ø3.3,
4.76, 6.35 and 9.5 mm.
The 3003 dry-well is designed to accept two different probe sizes: 4.76
and 12.7 mm.
In addition to the Ø3.3 mm reference hole, the 3004 dry-well is designed
to accept a 13 mm removable brass insert for probe sizes Ø3.3, 4.1,
4.76, 6.4 and 9.5 mm and is supplied with an insert of the customer's
choice.
Use the nearest, larger size insert to the probe diameter being checked.
The inserts are a close fit in the dry-well 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-well. Do not introduce any liquids or substance into the
dry-well or inserts as this may result in the inserts sticking in the dry-well.
TEMPERATURE CONTROLLER
In normal operating mode the numeric LED display shows the actual
well temperature. A Control Output Indicator light (O1) is located in the
top left corner of the display. This indicates the on/off state of the heater
element in the block.
To show the set point temperature in the display press and release either
the up or down arrow button (˄˅). Press and hold either the up or down
arrow button (˄˅) to change the set-point value.

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A shift can be entered into the controller by pressing the scroll (left-hand)
button. Press and hold either the up or down arrow button (˄˅) to
change the shift value. A factory set value will be entered at the time of
certification. The shift value should only be adjusted if the unit is being
monitored by an ETI Reference Thermometer or similar.
All other functions of the controller have been factory set and locked to
maintain accuracy and repeatability.
OPERATION
DRY-WELL SET-UP
Place the dry-well unit on a flat level surface with at least 150 mm of
space in front and behind. The stand may be swung out to lift the front
of the unit. Plug the power lead into a suitable grounded AC power
outlet socket. Check for and remove any foreign objects prior to switching
on. Turn the instrument on using the switch located on the rear panel,
below the power lead. The fan will start immediately and the controller
display will illuminate after approximately three seconds.
TEMPERATURE SETTING
The dry-well may be set to any temperature between 33 and 300 °C in
0.1 °C increments (see 3.1.6 Temperature Controller for details). The
control will cause the unit to heat to the set point temperature. A control
indicator light will show in the top left corner of the display when the
heater is active. The dry-well temperature is displayed in operation. A
small overshoot and undershoot will occur when the well reaches the
set point temperature. Ten minutes are normally required to reach a
higher set point temperature. It will take longer to reach a lower set point
temperature. Once the set point temperature is reached a further ten
minutes should be allowed to achieve stability. For optimum accuracy
and stability allow the unit to warm up for 30 minutes after power up.
The displayed well temperature should stay within ±0.5 °C of the set
point temperature.
PROBE TESTING
Insert the probe to be tested into one of the holes in the dry-well. The
probe should be a snug fit for good heat transfer but should not be so
tight that it cannot be removed easily. Best results will be obtained when
the probe is inserted to the full depth of the dry-well hole of closest size

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to the probe diameter. Allow the reading from the probe to stabilise
and then compare the reading with either the temperature controller
display or an external reference thermometer. For optimum comparison
accuracy use a high precision ETI Reference Thermometer or similar.
If probes with a large mass are inserted into the dry-well holes the unit
will require up to 10 to 15 minutes to re-stabilise.
MAINTENANCE
CARE OF THE 3000 SERIES UNITS
The 3000 Series of dry-wells require very little maintenance. Avoid
operation in dusty, dirty, oily or wet environments. If the case becomes
dirty it may be cleaned using a damp cloth and mild detergent. Do not
allow moisture to enter the case. It is important to check for and remove
any foreign objects in the dry-well holes.
WARNING: Never introduce any fluids or other foreign material into
the dry-well. This will damage the dry-well and could cause probes to
become lodged. It could also cause a potential electric shock hazard.
In the event that the heat source should require service or repair, please
contact ETI for assistance. There are no user serviceable parts inside
and any attempted repair will void any guarantee.
GUARANTEE
This instrument carries a two-year guarantee against defects in either
components or workmanship. During this period, products that prove to
be defective will, at the discretion of ETI, be either repaired or replaced
without charge. The product guarantee does not cover damage caused
by fair wear and tear, abnormal storage conditions, incorrect use,
accidental misuse, abuse, neglect, misapplication or modification.
Full details of liability are available within ETI's Terms & Conditions
of Sale at www.etiltd.com/terms. In line with our policy of continuous
development, we reserve the right to amend our product specification
without prior notice.

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SPECIFICATION
temperature range 33 to 300 °C (at 20 °C ambient)
resolution 0.1 °C
accuracy 33 to 199.9 °C ±0.5 °C
200 to 300 °C ±1 °C
holes greater than 6.35 mm ±2.0 °C
stability ±0.5 °C
heating times Ambient to 300 °C after 10 minutes
stabilisation 5 minutes
cooling times 300 to 100 °C after 15 minutes
3001 hole dimensions* 2 x Ø3.4, 1 x 4.1, 4.9 & 6.4 mm
3002 hole dimensions* 1 x Ø3.4, 4.9, 6.4 & 9.6 mm
3003 hole dimensions* 1 x Ø4.9 & 12.8 mm
3004 hole dimensions* 1x Ø3.4&13.0mm thatwill acceptvarious inserts
well depth 100 mm
power 230 volt AC 50-60 Hz (110-115 volt
50-60 Hz available) 200 watt
display 10 mm LED
case dimensions 57 x 125 x 158 mm
weight 900 grams
*hole dimensions given are nominal

Serial No. _____________________________________________________
Calibrated by ________________________Date _____________________
This instrument has been checked or calibrated against reference instrument(s) calibrated
by a UKAS Accredited Calibration Laboratory at 50 °C, 100 °C and 150 °C.
To BS EN 60584
INSTRUMENT RECORD CARD
3001 Dry-Well order code 271-301
3002 Dry-Well order code 271-302
3003 Dry-Well order code 271-303
3004 Dry-Well order code 271-304
manufactured by
Electronic Temperature Instruments Ltd
Easting Close, Worthing, West Sussex BN14 8HQ
tel: [phone] · fax: [phone]
email: [email protected] · www.etiltd.com
545-124/18.02.15