Maxwell MX-25 302 User Manual

MX-25 302
User’s guide for 3 1/2 digits multimeter

Description:

1.1 General description

2 Display: ½ digits liquid crystal display, with 26 mm characters max. displayable …1999

Polarity: Automatic negative polarity display
Null: Automatic
Measuring method: A/D converter
Measurement rate: 3/seconds
Overload Display: only the “1/-1” symbol is shown
Low Battery : the battery symbol is shown on the display

Security requirements: CE EMC/ LVD. The instrument corresponds to the IEC1010 standard.

Designed to Protection Class II requirement : Double insulation

Operating environment:0°...40 C°, relative humidity :<80%

Storage Temperature: Temperature: -10 C°…+50 C°. relative humidity :<80%

Battery: 9 V, IEC6F22 type battery
Dimensions: 189mm×92,5mm×35mm
Weight: 375g (with battery)

Accessories: Users guide, instrument cable (red and black, 1 pair), Plastic case,K type Thermo sensor,

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2.1 Electronic characteristics

Punctuality +/- (displayed value’s rate(%) + the number of the digits) 23 +/-5 C°, if the humidity is lower than 75%.

DC Voltage

Measuring range Accuracy Resolution

200 mV 0,1 mV

2 V 1 mV

20 V 10 mV

200 V

+/- (0,5%+3)

100 mV

1000 V +/-(1,0%+5) 1 V

Input Impedance: 10 M
Overload Protection: 200 mV range : 250V DC/AC RMS

2-1000 V range : 1000 V DC/AC RMS

AC Voltage

Measuring range Accuracy Resolution

2 V 1 mV

20 V 10 mV

200 V

+/- (0,8%+5)

100 mV

750 V +/-(1,2%+5) 1 V

Input impedance: 2 V range:10 M
20-700 V range :10M
Overload protection: 1000V DC/AC RMS
Frequency range: 2-200 V range :40-400 Hz
750 V range :40-200 Hz
Shown value : average rate (in case of RMS sinus sign)

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Resistance
Measuring range Accuracy Resolution

200 +/- (0,8%+5) 0,1 

2 1 

20  10 
200  100 
2 M 

+/- (0,8% + 3)

1 k 

200 M  +/-(5,0%(rdg-10) + 20) 100 k 

output voltage : <3V
Overload protection: 250 V DC/AC RMS

DC Current

Measuring range Accuracy Resolution

20 mA +/- (0,8% + 3d) 10 uA

200 mA +/- (1,2% + 4d) 100 uA

20 A +/- (2,0% + 5d) 10 mA

Max : 200 mV
Max input current: 20A (maximum 10 seconds)
Overload protection: 0,2 A/250 V “F” fusion
20A measuring range not ensured!

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