Digi-Sense Type K Manual de usuario

Technolo

ade

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.

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. 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. 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

Figure 2: LCD Segment

Figure 1: Keypad

Instruction Manual Type K Thermocouple Thermometer

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

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

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

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

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

OFF

HOLD

Figure 9: Calibration

Sequence

Instruction Manual Type K Thermocouple Thermometer

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

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

C°

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