Extech Instruments EX420-NIST User Manual page 13

Function Range
Frequency 5.000Hz
50.00Hz
500.0Hz
5.000kHz
50.00kHz
500.0kHz
5.000MHz
10.00MHz
Sensitivity: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5Vrms min @ 20% to 80% duty
cycle and > 100kHz.
Duty Cycle 0.1 to 99.9%
Temp
-20 to 750C
(type-K)
-4 to 1382F
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
Temperature Sensor
Input Impedance
AC Response
ACV Bandwidth
Display
Overrange indication
Auto Power Off
Polarity
Measurement Rate
Low Battery Indication
Battery
Fuses
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Operating Altitude
Weight
Size
Safety
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Resolution
0.001Hz
0.01Hz
0.1Hz
0.001kHz
0.01kHz
0.1kHz
0.001MHz
0.01MHz
0.1%
Pulse width: 100µs - 100ms, Frequency: 5Hz to 150kHz
1C
1F
Test current of 0.3mA maximum, open circuit voltage 1.5V DC typical
Audible signal will sound if the resistance is less than 150 (approx.),
test current <0.7mA
Requires type K thermocouple
>7.5MΩ (VDC & VAC)
Average responding
50Hz to 1kHz
4000 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
One 9 volt (NEDA 1604) battery
mA, µA ranges; 0.5A/250V fast blow
A range; 20A/250V ceramic fast blow
5ºC to 40ºC (41ºF to 104ºF)
o o o
-20 C to 60 C (-4 F to 140
Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC(104ºF)
<80%
2000 meters (7000ft) maximum.
342g (0.753lb) (includes holster).
187 x 81 x 50mm (7.36" x 3.2" x 2.0") (includes holster)
For indoor use and in accordance with the requirements for double
insulation to IEC1010-1 (2001): EN61010-1 (2001) Overvoltage
Category III 600V and Category II 1000V, Pollution Degree 2.
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Accuracy
(1.5% reading + 5 digits)
(1.2% reading + 2 digits)
(1.5% reading + 4 digits)
(1.2% reading + 2 digits)
(3.0% reading + 3 digits)
(probe accuracy not included)
o
F)
EX420-EU-EN v3.3 08/13