Extech Instruments K.J.E.T. 422324 Manuale utente

TYPE - K.J.E.T.

PRINTING THERMOMETER

Model 422324

INSTRUCTION MANUAL

CONTENTS

Title Page

I. SAFETY INFORMATION ......................................................... 1

II. SPECIFICATIONS ................................................................... 2

2-1 General Information

......................................................... 2

2-2 Electrical Specifications

.................................................. 4

IV.

PRECAUTIONS AND PREPARATIONS FOR MEASUREMENT

V. OPERATIONAL GUIDE ......................................................... 11

VI. INTERVAL PRINTING SETUP....................................... 18

VII. BATTERY REPLACEMENT ........................................... 19

VIII. Calibration and Repair Services ..................................... 19

I. SAFETY INFORMATION



Read the following safety information carefully before attempting to

operate or service the meter.



Use the meter only as specified in this manual; otherwise, the

protection provided by the meter may be impaired.



Use caution when working with voltages above 60V

or 24V

RMS. Such voltages pose a shock hazard.

Environment conditions



Altitude up to 2000 meters



Indoor use only



Relative humidity 90% max.



Operational Temperature

～

122

F (0

～

Maintenance & Cleaning



Repairs or servicing not covered in this manual should only be

performed by qualified personnel.



Periodically wipe the case with a dry cloth. Do not use abrasives

or solvents to clean this instrument.

U.S. Pat. No. Des. 460,923

Safety symbols

Meter is protected throughout by double insulation or

reinforced insulation.

When servicing, use only specified replacement parts.

Complies with EMC

II. SPECIFICATIONS

2-1 General Information

Display: 4-1/2 digit LCD

LCD illustration (see below)

Fig-1

T1-T2 , T2 , T1 Reflects the selected temperature display

configuration

MAX, MIN, AVG Maximum, Minimum or Average reading display

Avg = ½ (Previous reading + Current reading)

K , J , E , T Thermocouple types

HI ALARM Temperature exceeds high alarm limit (setpoint)

LO ALARM Temperature exceeds low alarm limit (setpoint)

Low battery symbol

Negative polarity; positive polarity assumed

℃

℉

Celsius and Fahrenheit temperature units

Printer active

■

Interval printing Start /Stop symbol

TIME Calendar time

INTV Interval printing symbol

h:m Hour : Minutes

m:s Minute: Seconds

m-d Month – Day

yy Calendar year

Seven segment display digit

Over Range or

appears.

Low battery indicator

Sampling Rate 1 reading per second (approx.)

Power Six 1.5V ‘AAA’ cells or 9V (500mA) adaptor

Battery Life (typ.)

30 hours (interval print set to 60 mins. & beeper off)

70 hours (no printing or beeper)

Input protection 60Vdc/24Vrms

Operating Temperature and Humidity

℉

to 122

℉

℃

to 50

℃

) below 90% RH

Storage Temperature and Humidity

℉

to 140

℉

(-10

℃

to 60

℃

) below 70% RH

Dimensions 7.6 (L) x 2.9 (W) x 1.5 (H)” (193

37 mm)

Weight Approx. 12.8 oz. (365g) with batteries & paper.

Accessories Carrying case, batteries, thermo-paper (2), Alarm

DIN cable and temperature probe (type K)

Printer

Thermo-printing type with 16 characters per line using 38mm

width plain thermo-paper.

Instant printing: Print on demand (button press)

Interval printing: Print at desired interval from 00:00:03 to 23:59:59

2-2 Electrical Specifications

Accuracy (23℃

±5℃

, below 80%RH)

Type K: ±( 0.1% rdg + 0.8℃) ( 0～1333℃)

±( 0.1% rdg + 1.4℉) ( 32～2431℉)

Type J : ±( 0.1% rdg + 0.8℃) ( 0～760℃)

±( 0.1% rdg + 1.4℉) ( 32～1400℉)

Type E: ±( 0.1% rdg + 0.8℃) ( 0～703℃)

±( 0.1% rdg + 1.4℉) ( 32～1297℉)

Type T: ±( 0.1% rdg + 0.8℃) ( 0～400℃)

±( 0.1% rdg + 1.4℉) ( 32～752℉)

Type K/J/E/T: ±( 0.5% rdg + 1.0℃) ( -200～0℃)

±( 0.5% rdg + 1.8℉) ( -328 ～32℉)

Resolution：0.1℃

/0.1℉

Temperature Coefficient:

0.1 times the applicable accuracy specification per ℃

from 0℃

to 18℃

and 28

℃

to 50℃

( 32℉to 64℉and 82℉to 122℉)

Measurement Range:

Type K: -200 ～1333℃

( -328～2431℉

)

Type J: -200 ～760℃

( -328～1400℉

)

Type E: -200 ～703℃

( -328～1297℉

)

Type T: -200 ～400℃

( -328～752℉

)

III. Description of Thermometer

Fig-2

LCD

Displays readings, units, symbols, and decimal points

POWER

Powers the unit on/off

UNIT

Selects the temperature units

(

℃

℉

)



Prints current measurement (print format shown below):

LINE 1

1 0 : 5 1 : 1 2 1 1 - 0 2

LINE 2

T 1 K - 0 0 2 3 . 0 C

Line 1: (Time) Hour: minute: second, month- day

Line 2: Measurement channel, thermocouple type, temp., and unit.



Stops interval printing at any time and prints current reading.



Press for 2 seconds to enable interval printing. Unit will remain in

the interval printing mode until this button is pressed again or the

FEED button is pressed.

9V-ADAPTOR SOCKET (3.5

)

FEED PAPER (Fig-3) :



Advances the thermo-paper one line.



Cancels printing.

TIME

：

Calendar program button.

MAX / MIN / AVG

：

Press to scroll through maximum, minimum and

average readings for channels T

/ T

-T

Fig-3

High / Low Alarm output connector

Fig-4

Pin 1: GND ( external supply low voltage )

Pin 2: VCC ( external supply high voltage )

Pin 3: SYNC ( external trigger signal )

Pin4 (High Alarm) and pin5 (Low Alarm) signals must be

synchronized with pin3. Pin5 and pin4 will not function

(always low) unless SYNC (pin3) is high. If SYNC is low, then

pin4 and pin5 will be low.

Pin4

: High Alarm

If the reading is higher than the high alarm setpoint, then (pin 4)

will be high, otherwise, it will be low.

Pin 5

: Low Alarm

If the reading is less than or equal to the low alarm limit, (pin 5)

will go high.

The Pin 4 and 5 outputs may be delayed 0.4 seconds due to the

datalogger’s A/D scanning time.

Description of the DIN cable:



Red wire VCC (external supply high voltage)



Black wire GND (external supply low voltage)



Yellow SYNC (external trigger signal)



White High Alarm



Purple Low Alarm

Note: voltage VCC to GND is 16V Maximum, 5V Minimum.

GND

≦

SYNC

≦

VCC

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