Extech Instruments EX845 User Manual page 14

Function Range and Resolution
-4 to 1400
Temperature
(type-K)
-20 to 760
Temp
-58 to -4°F
(IR)
-4 to 518°F
-50 to -20°C
-20 to 270°C
Clamp jaw opening
Display
Continuity check
Diode test
Low Battery indication
Over-range indication
Measurement rate
Bluetooth range
PEAK
Thermocouple sensor
IR Spectral response
IR Emissivity
IR distance ratio
Input Impedance
AC bandwidth
AC response
Crest Factor
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Operating Altitude
Battery
Auto power OFF
Dimensions & Weight
Safety
Patent notice
Accuracy (% of reading + digits)
o
F
o
C
±2.0% reading or ±2°C
1.7" (43mm) approx.
3-3/4 digits (4000 counts) backlit LCD
Threshold 40Ω; Test current < 0.5mA
Test current of 0.3mA typical;
Open circuit voltage < 3VDC typical
Battery symbol is displayed
'OL' display
2 readings per second, nominal
32 feet (10 meters) approximately
Captures peaks >1ms
Type K thermocouple required
6 to 16µm
0.95 fixed
8:1
10MΩ (VDC and VAC)
50 to 400Hz (AAC and VAC)
True rms (AAC and VAC)
3.0 in 40A and 400A ranges, 1.4 in 1000A range (50/60Hz
and 5% to 100% of range)
41°F to 104°F (5°C to 40°C)
-4°F to 140°F (-20°C to 60°C)
Max 80% up to 87°F (31°C) decreasing linearly to 50% at
104°F(40°C)
<80%
7000ft. (2000meters) maximum.
One (1) 9V Battery (NEDA 1604)
After approx. 10 minutes
10.6x4.3x2" (270x110x50mm); 13.6 oz. (386g)
For indoor use and in accordance with the requirements for
double insulation to IEC1010-1 (2001): EN61010-1 (2001)
Overvoltage Category IV 600V and Category III 1000V,
Pollution Degree 2.
U.S. Patent 7163336
14
o
± (3%rdg + 9 F)
o
± (3%rdg + 5 C)
± 9 °F
±2.0% reading or
± 4°F
whichever is >
±5°C
whichever is >
EX845-EN V2.1 02/10