Digi-Sense Type K User manual
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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 thermocouple
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
oC 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” batteries 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/oF keys.
ON/OFF Powers meter on and shuts the unit
off. Meter directly enters measurement
mode when you turn it on.
oC/oF Switches between
oC 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 oC 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 meter. 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 confirmvalue, wait 5
seconds.
CO = confirms
temperature calibration
Back to
measurement
Press °C/°F key
to decrease
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
oC or oF annunciator displayed in your
LCD indicates which mode you are taking
measurements in.
3. Press the °C/°Fkey 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°
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