Extech Instruments K.J.E.T. 422324 User manual

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 10
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
DC
or 24V
AC
RMS. Such voltages pose a shock hazard.
Environment conditions
 Altitude up to 2000 meters
 Indoor use only
 Relative humidity 90% max.
 Operational Temperature 32 ～ 122
ο
F (0 ～ 50
ο
C)
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
32
℉
to 122
℉
(0
℃
to 50
℃
) below 90% RH
Storage Temperature and Humidity
14
℉
to 140
℉
(-10
℃
to 60
℃
) below 70% RH
Dimensions 7.6 (L) x 2.9 (W) x 1.5 (H)” (193
×
74
×
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
1. LCD
Displays readings, units, symbols, and decimal points
2. POWER
Powers the unit on/off
3. UNIT
Selects the temperature units
(
℃
/
℉
)

4. PRINT

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.
5. 9V-ADAPTOR SOCKET (3.5
φ
)
6. FEED PAPER (Fig-3) :

Advances the thermo-paper one line.

Cancels printing.
7. TIME
：
Calendar program button.
8. MAX / MIN / AVG
：
Press to scroll through maximum, minimum and
average readings for channels T
1
/ T
2
/ T
1
-T
2
.
Fig-3

9. 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
1
: 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
1
: Low Alarm
If the reading is less than or equal to the low alarm limit, (pin 5)
will go high.
1
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