Digital Thermometer Manual
DT1 Version B
Model
DT1
S/N
Congratulations on your purchase of a Helmer DT1 solar-powered digital thermometer. The digital thermometer has been designed for use with
the Helmer QuickThaw™ Plasma Thawing System.
1 Recordingidenticationinformation
For easy reference, write the model and serial number on this
manual. Both the model and serial numbers are needed to
provide efcient service.
REF
A
B
C
Product Specication label (sample)
DT 1
SN
000000
Digital Thermometer
Label Description
A Model
B Serial number (S/N)
C WEEE symbol. For more information, see
Section 8, “Technical specications.”
D Date of manufacturing
E CE symbol. For more information, see Section 8,
“Technical specications.”
Noblesville, IN USA
2009
www.helmerinc.com
2 Installing the digital thermometer
1 Using a cleaner suitable for
stainless steel, clean the top section
of your Helmer thawer. Do not use
a cleaner that leaves a slippery lm
on the surface, which will prevent
the hook and loop fastener from
adhering.
2 Peel the
liner off
the hook
and loop
fastener to
expose the
adhesive.
3 Carefully insert the probe of the
digital thermometer through the
holes in the brackets in the thawer.
Align the digital thermometer
as desired, then press it onto the
surface of the thawer to adhere it in
place.
D
E
3 Using the digital thermometer
The stainless steel probe on the DT1 immerses in the water
in the chamber, and the display shows the temperature in
increments of 0.1 °C. For the display to work, there must be
enough light in the work area (at least 35 Lux).
When the digital thermometer is rst exposed to light, the
message “---oE” is displayed for about 12 to 15 seconds while
the thermometer initializes.
4 Calibrating the digital thermometer
Refer to the policy for your organization to determine how much
variance is acceptable. If the variance is within acceptable limits
for your organization, you may not need to change the setting.
You must have a thermometer to complete this procedure. The
thermometer must be independent of the digital thermometer,
and be calibrated and traceable according to the policy of the
National Institute of Standards and Technology (NIST), or to
the equivalent national or international measuring equipment
standards as identied in regulations for your organization.
To measure the temperature
1 Place the independent thermometer in the water chamber so
the tips of both thermometers are at the same depth.
2 Allow the temperature readings to stabilize.
3 Compare the reading of the digital thermometer to that of the
independent thermometer. If the difference is greater than
the acceptable tolerance for your organization, calibrate the
digital thermometer.
To calibrate the digital thermometer
1 Remove the back cover of the digital
thermometer by prying the back plate
off the housing.
2 Using a at-head screwdriver, turn
the calibration adjustment dial
slightly to change the readout value.
► To increase the value, turn the
dial clockwise.
► To decrease the value, turn the
dial counter-clockwise.
3 Allow the temperature readings
to stabilize for 15 to 30 seconds.
This will also allow the calibration
changes to take effect.
4 Repeat steps 1 to 3 as necessary until
the readout is acceptable.
5 Install the back cover by aligning the
mounting buttons with the holes on the housing, then pressing
the buttons into the holes.
360012-1/H
5 Removing the digital thermometer
8 Technicalspecications
To remove the digital thermometer, carefully lift up on the
housing to separate the hook and loop fastener, and pull
upwards.
6 Cleaning the digital thermometer
WARNING:
!
Clean and disinfect the digital thermometer regularly as necessary.
Clean the housing with a soft cloth and a non-abrasive liquid
cleaner. Clean the stainless steel probe with a general-purpose
laboratory cleaner suitable for stainless steel. Disinfect using a
mild disinfectant solution.
► Follow all chemical handling
and disposal requirements and
procedures specied by your
organization.
► Use specic cleansers and
cleaning supplies specied by
your organization.
7 Addressing operational issues
Problem Possible Cause Action
The
temperature is
not displaying.
The
temperature
does not seem
accurate.
There is not enough
light in the work
area to power the
digital thermometer.
The digital
thermometer is not
calibrated.
Conrm that the light
level in the room is at
least 35 lux. Increase
the light if necessary.
Verify the temperature
with an independent
thermometer and
calibrate the digital
thermometer if
necessary.
Power
Solar (minimum illuminance of 35 lux)
Weight
2.2 lb (1 kg)
Size
Width: 3.25 in (8 cm)
Height: 12.25 in (31 cm)
Depth: 4 in (10 cm)
Operating conditions
Ambient temperature range: 5 °C to 35 °C
Temperature detection range: -50 °C to 70 °C
Accuracy: ± 1 °C
Energy conservation and regulatory compliance
This device complies with the requirements of the
ROHS Directive 2002/95/CE.
The WEEE (waste electrical and electronic
equipment) symbol indicates compliance with
European Union Directive WEEE 2002/96/EC
and applicable provisions. The directive sets
requirements for the labeling and disposal of
certain products in affected countries.
When disposing of this product in countries affected by this
directive, ensure the following:
► Do not dispose of this product as unsorted municipal waste.
► Collect this product separately.
► Use the collection and return systems available to you.
For more information on the return, recovery, or recycling of this
product, contact your local distributor.
Warranty
USA and Canada: The Helmer DT1 is warranted for one (1) year for materials and labor at our factory. Contact Helmer for details.
Outside of USA and Canada: Contact your local distributor for warranty information.
Copyright © 2009 Helmer, Inc.
QuickThaw™ is a trademark of Helmer, Inc. All other trademarks and registered trademarks are the property of their respective owners.
HELMER, INC. 14395 BERGEN BLVD., NOBLESVILLE, IN 46060 USA
PHONE (317) 773-9073 FAX (317) 773-9082
USA and CANADA (800) 743-5637
www.helmerinc.com
ISO 13485:2003 CERTIFIED
360012-1/H
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