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Instruction Manual
Type K
Thermocouple Thermometer
68X243624
Rev. 0 02/04
Preface
This manual serves to explain the use of the Digi-Sense® Type K the rmocouple
thermometer.
This manual functions in two ways: first, as a step by step guide to help you
operate the meter; second, it serves as a handy reference guide.
This manual is written to cover as many anticipated applications of the Type K
meter as possible. If there are doubts in the use of the Type K meter, do not
hesitate to contact the nearest Eutech Instruments/ Oakton Instruments Authorized
Distributor.
Eutech Instruments/ Oakton Instruments will not accept any responsibility for
damage or malfunction to the meter caused by improper use of the instrument.
The information presented in this manual is subjected to change without notice as
improvements are made, and does not represent a commitment on the part of
Eutech Instruments Pte Ltd/ Oakton Instruments.
Copyright © 2004
Eutech Instruments Pte Ltd/ Oakton Instruments
Rev 0, 02/04.
Table of Contents
1. INTRODUCTION 1
2. GETTING STARTED 2
2.1 Description of Keypad Functions 2
2.2 Description of LCD Annunciators 2
2.3 Inserting & Removing the Rubber Boot / Stand (Optional
Purchase) 3
2.4 Inserting New Batteries 3
2.5 Battery Replacement 4
2.6 Connecting the Temperature Sensor 4
2.7 Switching the Meter On 4
3. CALIBRATION 5
3.1 Temperature Calibration 5
4. MEASUREMENT 7
4.1 Taking Measurements 7
4.2 Holding a Reading 7
4.3 Releasing a Held Reading 7
5. PROBE CARE AND MAINTENANCE 8
6. TROUBLESHOOTING 8
7. SPECIFICATIONS 9
8. ACCESSORIES 10
9. WARRANTY 11
10. RETURN OF ITEMS 12
Instruction Manual Type K Thermocouple Thermometer
1
1. INTRODUCTION
Thank you for purchasing the Digi-Sense Type K thermocouple thermometer. This
economical microprocessor-based handheld meter works with any type K probe
with color-coded yellow ANSI miniconnectors.
Type K probes (chromel-alumel) offer a wide temperature range from –250 to
1372 °C / –418 to 2502 °F; suitable for use in oxidizing environments
The meter features:
• Large LCD for clear and easy reading
• Readings in
o
C and oF (selectable)
• Low battery indicator
• Hold function, freezes measured reading
• User calibration - offset adjustment
• Built-in non volatile memory to ensure that calibration and other information
are not erased if battery is disconnected
This instruction manual is organized for quick reference with step-by-step
procedures that give you thorough review of the various features and meter
operations.
Included with your meter are 4 alkaline “AAA” batt eries and an instruction manual.
To order Type K thermocouple probes, please refer to Section on Accessories for
more information.
Instruction Manual Type K Thermocouple Thermometer
2
2. GETTING STARTED
2.1 Description of Keypad Functions
The meter has three keys on its splash-proof keypad. These keys include ON /
OFF, HOLD, and
oC/o
F keys.
ON/OFF Powers meter on and shuts the unit
off. Meter directly enters measurement
mode when you turn it on.
oC/o
F Switches between
o
C and oF
measurement mode
Activates the calibration mode when
used with the ON/OFF key.
Decrease the calibration value during
the calibration mode.
HOLD/ENTER Freezes the measured reading.
Confirm calibration value
Increase the calibration value during
the calibration mode.
2.2 Description of LCD Annunciators
The Digi-Sense Type K meter has a large custom LCD that consists of 4-digit
segments and operation annunciators for
o
C and oF. Other indicators include “HO”
(when the HOLD function is activated), “LO” (low battery condition) and “K” (Type K
thermocouple thermometer).
HOKLO
C
°
F
°
Figure 2: LCD Segment
Figure 1: Keypad
Instruction Manual Type K Thermocouple Thermometer
3
2.3 Inserting & Removing the Rubber Boot / Stand (Optional
Purchase)
1. To remove meter from rubber boot, push out from the bottom edges of meter
until it is completely out of boot. Ensure that the connector of temperature
sensor is not connected.
2. To insert meter into rubber boot, slide in from the top of meter before pushing
the bottom edges of meter down to set it into position. Lift up the stand at the
back of meter for bench top applications if necessary.
Figure 3: Inserting meter into the rubber boot
2.4 Inserting New Batteries
The battery compartment is found at the back of instrument. To open the battery
compartment, push in the direction of arrow and lift up the cover. Note the polarity
of battery before inserting into position. After replacement, place cover back and
press down until it locks tight.
Figure 4: Battery compartment at the back of the meter
Instruction Manual Type K Thermocouple Thermometer
4
2.5 Battery Replacement
A “LO” annunciator in the LCD alerts you when battery power is running low.
Replace with the same type as recommended by the manufacturer.
K
LO
o
C
Figure 5: Low battery indicator
Caution: Power off the meter when changing battery.
2.6 Connecting the Temperature Sensor
Insert the yellow 2-pin mini connector plug of the temperature sensor into the
connector socket on the side of the meter.
NOTE: The negative pin is larger than the positive pin, be sure to properly align the
pins. Remove sensor from meter for long periods of non use.
Figure 6: Connecting the temperature sensor
2.7 Switching the Meter On
1. Press ON/OFF key to power up your mete r. The
meter will momentarily display its revision
number and the whole LCD segments before
switching to the measurement mode.
2. The LCD displays “oPEn” if the temperature
sensor is faulty, or there is an open circuit, i.e. no sensor is attached. Please
refer to section on Troubleshooting if in doubt.
Figure 7: "Open" annunciator
Instruction Manual Type K Thermocouple Thermometer
5
3. CALIBRATION
3.1 Temperature Calibration
Your meter is factory calibrated. The meter
allows you to enter a 1-point calibration as fine
adjustment by changing its offset value. This
is useful when using a new probe for the first
time.
1. Connect the temperature probe and
switch on the meter.
2. Dip the probe in a constant
temperature bath, or in liquid whose
temperature can be checked
against another accurate
thermometer. For best accuracy,
place your thermocouple probe and
the reference thermometer in a
constant temperature bath.
3. Note the reading. Power off the
meter once the reading has
stabilized.
4. With the meter powered off, hold
down °C/°F key and press ON/OFF
key to power up the meter.
5. Continue to hold down °C/°F key
until display shows “CA”
momentarily. This is followed by a
blinking value which is with respect
to the factory default calibration.
6. To adjust the display until it matches
the correct temperature:
- Press °C/°F key to decrease
- Press HOLD key to increase
With meter off, Hold
down key and
press to
power on the meter.
Continue hold down
until display
shows CA
momentarily.
°C/°F
ON/OFF
°C/°F
C
°
C°
°C
Press HOLD key to
increase value
To co n fi rm va lu e , wa i t 5
seconds.
CO = confirms
temperature calibration
Back to
measurement
Press °C/°F key
to d ecrease
value
°C°F
°C°F
ON
OFF
HOLD
Figure 9: Calibration
Sequence
Instruction Manual Type K Thermocouple Thermometer
6
7. To confirm value, wait for 5 seconds without any key press. The “CO”
display appears signifying conformation and meter goes back to the
measurement mode.
8. To abort calibration, press ON/OFF key to power off the meter.
NOTE: The offset adjustment window is ±10°C (±18°F) of the factory
default value.
Instruction Manual Type K Thermocouple Thermometer
7
4. MEASUREMENT
4.1 Taking Measurements
1. The meter automatically enters
Temperature mode when powered on. The
“K” annunciator will be displayed.
2. The
o
C or oF annunciator displayed in your
LCD indicates which mode you are taking
measurements in.
3. Press the °C/°F key to toggle between temperature units.
4.2 Holding a Reading
To freeze or hold your reading, press HOLD key
once. The LCD displays ”HO” annunciator to indicate
the HOLD function is activated.
4.3 Releasing a Held Reading
Press HOLD key again to deactivate HOLD function or to release your frozen
reading. The meter returns to measurement mode, and the “HO” annunciator
disappears from the LCD.
KHO
F
o
K
C°
Instruction Manual Type K Thermocouple Thermometer
8
5. PROBE CARE AND MAINTENANCE
For best results, maintain the thermocouple probe as per the manufacturers
instructions.
To remove the probe, simply hold firmly onto the plastic yellow mini-connector and
pull out of the meter’s socket. Store both the probe and meter into its original
packaging when not in use.
6. TROUBLESHOOTING
Problem Cause Solution
No display when
turned on.
a) Batteries not in place. a) Re-insert batteries in correct polarity.
“oPEn” display
on LCD
a) Probe not connected a) Make sure probe is firmly connected or
is not damaged.
“Ur” or “Or”
display on LCD
a) Measurement over
(Or) or Under (Ur) range
a) Ensure temperature taken is within
meter’s specification.
“LO” annunicator
in the LCD
a) Low battery a) Replace batteries with fresh ones.
Inaccurate
readings
a) Wrong thermocouple
probe type used
b) Reading has not
stabilized
c) Temperature
calibration not correct
or new probe used
a) Verify that Type K probe is used.
b) Check time constant of probe &
wait for reading to stabilize
c) Recalibrate
Unstable reading
a) Electrode not deep
enough in sample
b) Dirty connector
c) Broken probe
d) External “noises” or
induction caused by
nearby electrical motor
a) Place probe deeper in sample.
b) Clean probe connector.
c) Replace electrode.
d) Remove or switch off interfering
motor.
Slow response
a) Dirty probe a) Clean probe
Instruction Manual Type K Thermocouple Thermometer
9
7. SPECIFICATIONS
Temperature Range
Type K
-250 to 1372 °C (-418 to 2501 °F)
Resolution
t<-99.0 °C
-99.9 °C<t<299.9 °C
t>299.9 °C
1 °C (1 °F)
0.1 °C (0.1 °F)
1 °C (1 °F)
Accuracy
t<-99.9 °C
t>-99.9 °C
± 0.25% of reading + 1 °C (2 °F)
±0.25% of reading + 0.5 °C (0.9 °F)
Offset Adjustment Window
±10 °C (±18 °F)
Auto Power-Off 17 minutes after last key-press
Hold Function Yes
Display Custom LCD
Low Battery Indicator Yes
Input 2-pin ANSI mini connector
Power Requirement 4 ‘AAA’ Batteries
Battery Life >400 hours continuous operation
Operating Temperature
0 to +50 °C (32 to 122 °F)
Dimension / Weight Meter: 14 x 7 x 3.5 cm / 200 g
Boxed: 24 x 17 x 8 cm / 550 g
Instruction Manual Type K Thermocouple Thermometer
10
8. ACCESSORIES
Item Description Eutech Instruments
Ordering Code
Oakton Instruments
Ordering Code
Digi-Sense Type K Thermocouple
Thermometer
93000-00 93000-00
Type K general purpose probe (immersion
into liquids), 5-ft coiled cable.
EC-TPGLPK-01M 08516-55
Type K penetration probe (meat, semi-soft
materials), 5-ft coiled cable.
EC-TPPENK-01M 08516-65
Type K surface probe (direct contact on
hot surface, no liquids), 5-ft coiled cable.
EC-TPSURK-01M 08516-60
Type K alligator clip-on surface probe, 2”,
(electronics, tubing, no liquids), 5-ft coiled
cable.
EC-TPCLPK-01M 08469-02
Rubber Boot / Stand EC-RUBBERBOOTTC 35627-80
Replacement AAA Batteries 60X023200 09376-00
Instruction Manual Type K Thermocouple Thermometer
11
9. WARRANTY
This meter is supplied with a warranty against significant deviations in material and
workmanship for a period of THREE years from date of purchase.
If repair or adjustment is necessary and has not been the result of abuse or misuse
within the designated period, please return – freight pre-paid – and correction will
be made without charge. Eutech Instruments/ Oakton Instrume nts will determine if
the product problem is due to deviations or customer misuse.
Out of warranty products will be repaired on a charged basis.
Exclusions
The warranty on your instrument shall not apply to defects resulting from:
• Improper or inadequate maintenance by customer
• Unauthorized modification or misuse
• Operation outside of the environment specifications of the product
Instruction Manual Type K Thermocouple Thermometer
12
10. RETURN OF ITEMS
Authorization must be obtained from our Customer Service Department or
authorized distributor before returning items for any reason. A “Return Goods
Authorization” (RGA) form is available through our authorized distributor. Please
include data regarding the reason the items are to be returned. For your protection,
items must be carefully packed to prevent damage in shipment and insured against
possible damage or loss. Eutech Instruments/ Oakton Instruments will not be
responsible for damage resulting from careless or insufficient packing. A
restocking charge will be made on all unauthorized returns.
NOTE: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make
improvements in design, construction, and appearance of products without notice.
For more information on Eutech Instruments/ Oakton Instruments’ products,
contact your nearest distributor or visit our website listed below:
Oakton Instruments
P.O Box 5136,
Vernon Hills, IL 60061, USA
Tel: (1) 888-462-5866
Fax: (1) 847-247-2984
E-mail: info@4oakton.com
Web-sites:
www.4oakton.com
www.oaktoninstruments.com
Eutech Instruments Pte Ltd.
Blk 55, Ayer Rajah Crescent,
#04-16/24 Singapore 139949
Tel: (65) 6778 6876
Fax: (65) 6773 0836
E-mail: marketing@eutechinst.com
Web-site: www.eutechinst.com
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