DMM 249.
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DMM 249
CHARACTERISTICS
DC Volts
Range
300 mV
3 V
30 V
300 V
1000 V
Resolution
0.1 mV
1 mV
10 mV
100 mV
1 V
Accuracy:
±(0.3% of rdg + 2 cts).
Input Impedance: 10 megaohm paralleled by < 100 pF.
Overload Protection: 1100 VDC or VAC peak-topeak.
AC Volts
Range
3 V
30 V
300 V
750 V
Resolution
1 mV
10 mV
100 mV
1 V
Frequency Response:
3 V range: 40 to 300 Hz;
Other ranges: 40 Hz to 1 kHz.
Accuracy: ±(1.3% of rdg + 3 cts).
Input Resistance: 10 megaohm paralleled by < 100 pF.
Overload Protection: 1100 VAC peak-to-peak.
DC Current
Range
300 µA
3 mA
30 mA
300 mA
20 A
Accuracy:
300 µA: ±(1% of rdg + 2 cts).
3 mA: ±(1.2% of rdg + 2 cts).
30 mA: ±(1% of rdg + 2 cts).
300 mA: ±(1.2% of rdg + 2 cts).
20 A: ±(2% of rdg + 3 cts).
Burden Voltage:
Resolution
0.1 µA
1 µA
10 µA
100 µA
10 mA

300 µA, 30 mA: 200 mV max;
3 mA, 300 mA, 20 A: 2 V max.
Overload Protection: mA ranges: 1 A (600 V) fast-blow fuse;
20 A range: 15 A (600 V) fast-blow fuse.
AC Current
Range
300 µA
3 mA
30 mA
300 mA
20 A
Resolution
0.1 µA
1 µA
10 µA
100 µA
10 mA
Accuracy:
300 µA, 3 mA, and 30 mA ranges: ±(1.5% of rdg + 4 cts).
300 mA: ±(2% of rdg + 4 cts).
20 A: ±(2.5% of rdg + 5 cts).
Burden Voltage:
300 µA, 30 mA ranges: 200 mV max;
Other ranges: 2 V max.
Frequency Response: 40 Hz to 1 kHz.
Overload Protection: mA ranges: 1 A (600 V) fast-blow fuse;
20 A range: 15 A (600 V) fast-blow fuse.
Resistance
Range
300 Ohm
3 kilohm
30 kilohm
300 kilohm
3 megaohm
30 megaohm
Resolution
0.1 Ohm
1 Ohm
10 Ohm
100 Ohm
1 kilohm
10 kilohm
Accuracy:
300 Ohm: ±(1.2% of rdg + 4 cts).
3 kilohm, 30 kilohm, and 300 kilohm ranges: ±(1.0% of rdg + 2 cts).
300 megaohm: ±(1.5% of rdg + 3 cts).
30 megaohm: ±(2.5% of rdg + 5 cts).
Overload Protection: 600 VDC/AC RMS.
Test Voltage (open circuit): approximately equal to
1.3 V.
Continuity
Buzzer sounds if resistance < 30 Ohm.
Input Protection: 600 VDC/AC RMS.
Diode Test
Max Test Current: 1.5 mA.

Test Voltage (open circuit): 3.3 V.
Resolution: 1 mV.
Input Protection: 600 VDC/AC RMS.
Safety
UL1244, CSA231, EN61010-1.
Physical Characteristics
Dimensions
Length
Width
Depth
Net Weight with battery with holster mm
192
95
50 kg
0.36
0.56
Display: 3200 count LCD.
Sampling Rate: 2 S/s for digital display; 12 S/s for analog bar graph.
Operating Ambient Temperature: 0 to 50°C (0 to
80% R.H.).
Automatic Power Off: After 10 minutes.
Power Supply: 9 V battery.
Battery Life: 350 hours typical (alkaline).
in.
7.5
3.7
1.9
lb.
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Features
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Product manufactured in ISO 9001 registered facilities
49A-10733-3p481, 06/1997, 09/01/1999
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