Extech 421509 Specifications
Specifications subject to change without notice.
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5/13/09 - R1
Built-in PC interface with internal memory stores up to 16 data sets,
1024 maximum capacity
With Programmable Hi/Lo audible alarm
Dual Input Datalogging Thermometer w/ Alarm
Ordering Information:
421509 ................Dual Input Thermometer
421509-NIST ......Dual Input Thermometer with NIST Certificate
153117 ................117V AC adaptor
Features:
• Seven Thermocouple type selections: K, J, T, E, R, S, N
• Large backlit LCD with two secondary displays for
simultaneous T1, T2, T1-T2, Time and advanced readouts
• T/C offset adjustment
• REC, MAX, MIN, MAX-MIN, AVG and °C/°F switchable
• Data Hold and Relative Function
• Built-in bi-directional RS-232 PC interface
• Real time clock with calendar
• Selectable auto power off function, disable capability
• Complete with two Type-K bead wire temperature probes
(-4 to 482°F /-20 to 250° C), Windows®95/98/ME/NT/
2000/XP compatible software, RS-232 cable, protective holster,
and 9V battery
Specifications Range Resolution
K type -328 to 2501oF (-200 to 1372oC) 0.1o (0.2°>700oF)
J type -346 to 2192oF (-210 to 1200oC) 0.1o (0.2o>500oF)
T type -328 to 752oF (-200 to 400oC) 0.1o (0.2o>600oF)
E type -346 to 1832oF (-210 to 1000oC) 0.1o (0.2o>450oF)
R type 32 to 3212oF (0 to 1767oC) 1o
S type 32 to 3212oF (0 to 1767oC) 1o
N type -58 to 2372oF (-50 to 1300oC) 0.2oF (0.1oC)
Accuracy
K, J, T, E types ±(0.05% rdg + 0.6oF) -58oF to 2501oF
±(0.05% rdg + 1.4oF) -58oF to -346oF
±(0.05% rdg + 0.3oC) -50oC to 1370oC
±(0.05% rdg + 0.7oC) -50oF to -210oC
N type ±(0.05% rdg + 1.6oF) -58oF to 32oF
±(0.05% rdg + 0.8oF) 32oF to 2372oF
±(0.05% rdg + 0.8oC) -50oC to 0oC
±(0.05% rdg + 0.4oC) 0oF to 1300oC
R, S types ±(0.05% rdg + 4.0oF) 32oF to 3212oF
±(0.05% rdg + 2.0oC) 0oC to 1767oC
Supplied Thermocouples 4', type K (with teflon insulation) Max insulation temp: 500oF (260oC)
Accuracy: ± 4oF (±2.2oC) or ± 0.75% of rdg
(whichever is greater) from 32 to 1472oF (0 to 800oC)
Battery Life 100 hours typical
Dimensions/Weight 7.5x3.6x2.1” (192x91x52.5mm); 11.7oz. (365g)
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