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USER GUIDE 

 

 

 
 
 
 
 
 
 

Dual Input, 3-Display Thermometer/Datalogger 

 

Model 421509

 

 
 

 

Accepts J, K, T, E, R, S, & N thermocouples 

  Internal Memory stores up to 16 data sets, 

with 1024 maximum data capacity 

 

Backlit LCD Display 

 

T1 / T2 / T1 – T2 displays 

 

MIN / MAX / AVG Record/Recall 

 

Selectable temperature units (C/F) 

 

Data Hold, Relative Mode, Elapsed Timer 

 PC 

Interface 

 
 
 
 
 
 
 
 
 
 
 

ESC -

0

ENTER

1

2

3

4

5

6

7

8

9

DISPLAY

¡C/¡F

[Limits]

LOG

READ

TYPE

T1/T2

REL

HOLD

SHIFT

[OFS]

CLR ?

SET[ ]

SAVE

READ

[TIME]

T1-T2

[APO]

MAX/MIN

[INVT]

TYPE

T1/T2

MAIN

SECOND

THIRD

421509

T1

¡F T1-T2

K

APO

¡F T1

Summary of Contents for 421509

Page 1: ...imum data capacity Backlit LCD Display T1 T2 T1 T2 displays MIN MAX AVG Record Recall Selectable temperature units C F Data Hold Relative Mode Elapsed Timer PC Interface ESC 0 ENTER 1 2 3 4 5 6 7 8 9 DISPLAY C F Limits LOG READ TYPE T1 T2 REL HOLD SHIFT OFS CLR SET SAVE READ TIME T1 T2 APO MAX MIN INVT TYPE T1 T2 MAIN SECOND THIRD 421509 T1 F T1 T2 K APO F T1 ...

Page 2: ... device WARNING To avoid electrical shock do not use this instrument when working near voltages over 24V AC DC WARNING To avoid damage or burns do not make temperature measurement in microwave ovens CAUTION Repeated flexing can break the thermocouple leads To prolong lead life avoid sharp bends in the leads especially near the connector This symbol on the instrument indicates that the operator mus...

Page 3: ...ith the Save function in the Shift Mode 1 Press the SAVE READ button to activate the read data function The word READ will be displayed on the LCD 2 Press the SECOND button until the sign is displayed in the bottom left display The location of the read pointer within the saved data table will be displayed 3 Press the 3 or 6 button to display the next data location Press the 2 or 5 button to increm...

Page 4: ...With the REC MAX MIN icon on the display the main display shows the difference between Max and Min 5 With the REC AVG icon on the display the main display shows only the average of all the readings recorded Note that the averaging limit is 22 hours After 22 hours the last average reading display is held on the LCD The meter emits a tone when a new minimum or maximum value is recorded Use the HOLD ...

Page 5: ...ed in one log session Press the LOG button again to exit the data log function CLR Button The CLR function clears all the saved and logged data in memory When the CLR button is pressed MEM is displayed and CLR flashes on the upper right of the LCD Press the overlay ENTER button to clear all saved and logged data or the ESC button to exit the function REL Button Press the REL key to enter the Relat...

Page 6: ...ress the number buttons printed in white on the overlay to set Hi and Lo limit values The button same as the ESC overlay can be used to set a negative value Setting is from left to right digit Press the ENTER button to confirm each setting Mini DIN Hi Lo Alarm Output The alarm output jack refer to Figure 1 located on the top of the meter can be used to power external warning or switching devices w...

Page 7: ...ain display will blink showing the previous setting Press the number buttons printed in white on the overlay to change the offset The resolution is 0 1 Use the button to set a negative value Press the ENTER button to confirm MAX 1999 9 C F System Time Setting To set or change the system time press the TIME button in Setup Mode The time and date in the bottom right display will blink Enter from lef...

Page 8: ...red as text files on a PC The data files can then be exported to spreadsheet or other programs for further manipulation graphing sorting filing etc Connecting the Meter to a PC Connect the Optical Interface connector to the 421509 Thermometer The IR2 label should be facing up Connect the USB connector to the PC COM port 1 16 PC Requirements Note Please visit the www extech com website for the late...

Page 9: ...o F 0 1o C 1o F 2000 J type 346 to 2192o F 210 to 1200o C 0 1o F 0 1o C 1o F 2000 T type 328 to 752o F 200 to 400o C 0 1o F 0 1o C E type 346 to 1832o F 210 to 1000o C 0 1o F 0 1o C R type 32 to 3212o F 0 to 1767o C 1o F 1o C S type 32 to 3212o F 0 to 1767o C 1o F 1o C N type 58 to 2372o F 50 to 1300o C 0 1o F 0 1o C Accuracy Specifications Thermocouple Accuracy K J T E types 0 05 rdg 0 6o F 58o F...

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