Extech Instruments 421509 - User Manual

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
123
456
789
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

Extech Instruments 421509 Specifications

General

Model	421509
Category	Measuring Instruments
Temperature Range	-4 to 140°F (-20 to 60°C)
Power	9V battery
Operating Temperature	32 to 122°F (0 to 50°C)
Type	Thermometer and Hygrometer
Humidity Range	0 to 100% RH
Resolution	0.1°F/°C; 0.1%RH
Accuracy (Humidity)	±3% RH
Display	LCD
Sampling Rate	1 second
Weight	3.2 oz (91 g)

Summary

Safety Information

Operation

Normal Mode Operation

Explains the default operating mode and its functions.

Limits Function

Describes activating and using the high/low limit alert feature.

Data Read Function

Describes retrieving previously saved data from memory.

Data Log Read Function

Details how to access and view logged measurement data.

HOLD Mode

MIN;MAX;AVG Recording Mode

Shift Mode Operation

Temperature Unit Selection (°C;°F)

Data Save Function

Data Logging Function

Continuously records measurement data at a set interval.

Clear Memory Function

Relative Mode

Auto Power Off Control

Setup Mode

Hi;Lo Limit Setup

Configures high and low measurement limits for alerts.

Hi;Lo Alarm Output Configuration

Sets up external alarm or switching devices via the Mini DIN port.

Interval Time Setting

Auto Power Off Time Setting

Thermocouple Offset Adjustment

Error Messages and Conditions

RS-232 PC Interface and Software

Connecting Meter to PC

Instructions for physically linking the thermometer to a computer.

PC System Requirements

Lists the necessary hardware and software for PC connectivity.