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PHYSICSPHYSICS

PHYSICS

U17450 Analog Multimeter with Zero-point Center/Left

1 Rotary switch to select the

measurement range

2 Rotary knob to set the

electrical zero-point in the

center of the scale

3 Safety connection sockets

4 Slide switch to select the

operating mode

5 Adjustment screw to set the

zero-point mechanically

6 Nub to latch the housing

shut

Instruction Sheet

10/04 MC/ALF

Handheld meter for current and

voltage measurement.

1. Safety instructions

• Before using the analog multime-

ter, make sure you read the oper-

ating instructions carefully and

that you comply with them com-

pletely.

• The safety of the multimeter and

the person operating it can only

be guaranteed if it is used in ac-

cordance with the instructions. Do

not operate or handle this unit

incorrectly or inappropriately.

• The device may only be used by

persons, who are aware of the haz-

ards of contact (for voltages over

30 V rms) and can undertake the

appropriate safety precautions.

This also includes the appearance

of unforeseen voltages e.g. in de-

fective units or charged capacitors.

• In the case of voltage and current

measurements the nominal volt-

age between the phase and neu-

tral conductor may not exceed 300

V according to CAT II (in circuits

that are directly connected to the

mains) and CAT III (in building wir-

ing installations) 300 V.

• The analog multimeter may be

used for measurements in circuits

with corona discharge (high volt-

age).

• In measurements involving RF cir-

cuits special care must be taken

due to the existence of dangerous

hybrid voltages.

• The appropriate permissible mea-

surement range may not be ex-

ceeded. Always change from a

higher measurement range to a

Summary of content (5 pages)

PAGE 1
3B SCIENTIFIC SCIENTIFIC® PHYSICS U17450 Analog Multimeter with Zero-point Center/Left Instruction Sheet 10/04 MC/ALF 1 Rotary switch to select the measurement range 3 knob to set the 6 2 Rotary electrical zero-point in the center of the scale 4 3 Safety connection sockets 5 4 Slide switch to select the 2 1 operating mode 5 Adjustment screw to set the zero-point mechanically 6 Nub to latch the housing shut Handheld meter for current and voltage measurement. of unforeseen voltages e.g.
PAGE 2
lower measurement range. • Before using the device, check the housing and the measurement cables for any damage. • Do not conduct measurements in a damp environment. Workplace, hands, shoes and floor must be dry. • Before opening the housing all measurement leads are disconnected from the device. caused by mechanical stress. Measurement ranges: Voltage measurement: DC Meas. range Internal resistance 100 mV 10 MΩ 300 mV 10 MΩ 1V 10 MΩ 3V 10 MΩ 10 V 10 MΩ 100 V 10 MΩ 300 V 10 MΩ 2.
PAGE 3
• Check the electrical zero-point. Set the slide switch (4) into the “ ” position. Select the measurement range, the needle must be set to zero-point in the center of the scale, otherwise correct using the rotary knob (2). • Check the battery. To do this set the slide switch (4) to “ ” , and then adjust the rotary switch (1) to“ ”. If the needle does not deflect into the battery test zone designated “ ” the battery must be replaced.
PAGE 4
3.3.1 Operating mode: electrical 3.3.2 Operating mode: electrical zero-point center • Set the slide switch (4) to the “ ” setting. • Using the rotary switch (1) select the corresponding measurement range “V ...”. • The needle should now be positioned in the center of the scale. • Connect the multimeter and take a reading from the lower scale. ble to isolate DC-voltage components in an amplifier output stage, for example. The resultant measurement error is less than 0.2% at a measurement frequency of 50 Hz.
PAGE 5
3.6.1.2 Operating mode: electrical zero-point center • Adjust the slide switch (4) to the “ ” setting. • Using the rotary switch (1), select the corresponding measurement range “A ...”. • The needle should be located in the center of the scale. • Connect the multimeter and take a reading from the lower scale. 3.6.3 Measuring AC current ~ • Set the slide switch (4) to the “ ” setting. • Use the rotary switch (1) to select the corresponding measurement range “A~”.