Extech Instruments 450 User Manual page 6

Function Range
Resistance
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
20MΩ
Temp
-58 to 518°F 1°F
(IR)
-50 to270°C 1°C
NOTE: Accuracy specifications consist of two elements:
• (% reading) – This is the accuracy of the measurement circuit.
• (+ digits) – This is the accuracy of the analog to digital converter.
Diode Test
Continuity Check
IR Spectral response
IR Emissivity
IR distance ratio
Input Impedance
AC Response
ACV Bandwidth
Display
Overrange indication
Auto Power Off
Polarity
Measurement Rate
Low Battery Indication
Resolution
±(0.8% reading + 4 digits)
0.1Ω
±(0.8% reading + 2 digits)
0.001kΩ
0.01kΩ
±(1.0% reading + 2 digits)
0.1kΩ
0.001MΩ
±(3.0% reading + 5 digits)
0.01MΩ
±2.0% reading or ±2°C, ± 4 °F
Test current of 0.3mA maximum,
open circuit voltage 1.5V DC typical
Audible signal will sound if the
resistance is less than 150Ω
(approx.), test current <0.7mA
6 to 16µm
0.95 fixed
8:1
>7.5MΩ (VDC & VAC)
Average responding
50Hz to 1kHz
2000 count backlit liquid crystal
"OL" is displayed
15 minutes (approximately)
Automatic (no indication for
positive); Minus (-) sign for negative
2 times per second, nominal
" " is displayed if battery voltage
drops below operating voltage
6
Accuracy
EX450V5.0V 10/06