hama EM393B Digital Multimeter Instruction Manual

: June 3, 2024
: Hama

hama EM393B Digital Multimeter

Controls and Displays

3.5-character display
Measuring range adjustment
COM port
VmA Ω Port
10 A Port

Thank you for choosing a Hama product.
Take your time and read the following instructions and information completely. Please keep these instructions in a safe place for future reference. If you sell the device, please pass these operating instructions on to the new owner.

Explanation of Warning Symbols and Notes

| Warning
This symbol is used to indicate safety instructions or to draw your attention to specific hazards and risks.
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| Note
This symbol is used to indicate additional information or important notes.
| Risk of electric shock
This symbol indicates product parts energized with a dangerous voltage of sufficient magnitude to constitute a risk of electric shock.

Package Contents

1x Digital Multimeter »EM393B«
1x measuring cable, red
1x measuring cable, black
1x E block or 9Vblock
Operating Instruction

Safety Notes

This product is intended for private, non-commercial use only.
Use the product for its intended purpose only.
Protect the product from dirt, moisture and overheating, and only use it in a dry environment.
Do not use the product in the immediate vicinity of heaters or other heat sources or in direct sunlight.
Do not use the product in areas where the use of electronic devices is not permitted.
Do not drop the product and do not expose it to any major shocks.
Do not modify the product in any way. Doing so voids the warranty.
Do not operate the product outside the power limits given in the specifications.
Do not open the device or continue to operate it if it becomes damaged.
Do not attempt to service or repair the product yourself.
Leave any and all service work to qualified experts.
Use the item only in moderate climatic conditions.
Inappropriate use of this measuring device can lead to damage, electric shock, injuries or mortal danger. Please read these operating instructions carefully before using the device for the first time.
Always disconnect the measuring cables before changing the battery or fuse.
Before use, check the measuring cables and the measuring device for any damage. Have any damage repaired and replace defective cables before using the device.
Take special care when handling voltages higher than AC 25 V (root-mean-square value) or DC 35 V . There is a risk of electric shock when handling devices with these voltages.
Discharge all capacitors and disconnect the test object from the mains grid before testing diodes, resistors orcircuit continuity.
This CAT II measuring device must not be used for building installations (sockets, distributors, cables, etc.). You may only use it to take measurements on electrical circuits connected to the low-voltage grid (household appliances, portable tools etc.).
This device is not a toy and must be kept away from children.
It contains dangerous objects and small parts; always make sure that these are not swallowed by children. If a child has swallowed a part of this device, contact a doctor immediately.
Do not leave batteries or packaging material lying around unattended. These can put children at risk if used as a toy.
If you do not plan to use the device for a longer period of time, remove the battery to prevent it from leaking.
Old or damaged batteries can cause chemical burns to your skin.
In such cases, always use protective gloves.
A correct display is only guaranteed for temperatures between 0 °C and +40 °C and for frequencies from 40 Hz to 400 Hz.
The clarity of the display may be impaired by unfavourable lighting (e.g. sunlight), unfavourable locations (e.g. wooden step ladders or insulating floor covering), or by improperly grounded AC grids.
Never exceed the maximum permitted input values for current and voltage.
TAKE SPECIAL CARE when handling high voltages.
DO NOT measure the voltage at the “COM” input socket if the voltage is higher than 300 V above earth connection.
NEVER connect the measuring cables to a voltage source if the function selection switch is set to current, resistor or diode test.
Not following these instructions can result in damage to the measuring device.
ALWAYS discharge the filter capacitors in the power supplies and disconnect the voltage source if you want to measure resistance or test diodes.
ALWAYS disconnect the power and remove the measuring cables before opening the cover to change the fuse or battery.
NEVER use the measuring device unless you have safely locked the cover on the back of the device again.

| Warning – Batteries

When inserting batteries, note the correct polarity (+ and – markings) and insert the batteries accordingly.
Failure to do so could result in the batteries leaking or exploding.
Only use batteries (or rechargeable batteries) that match the specified type.
Before you insert the batteries, clean the battery contacts and the polarcontacts.
Do not allow children to change batteries without supervision.
Do not mix old and new batteries or batteries of a different type or make.
Remove the batteries from products that are not being used for an extended period (unless these are being kept ready for an emergency).
Do not short-circuit batteries.
Do not charge batteries.
Do not throw batteries in a fire.
Keep batteries out of the reach of children.
Never open, damage or swallow batteries or allow them to enter the environment. They can contain toxic, environmentally harmful heavy metals.
Immediately remove and dispose of dead batteries from the product.
Avoid storing, charging or using the device in extreme temperatures and extremely low atmospheric pressure (for example, at high altitudes)

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Replacing the battery:

Disconnect the measuring device from live components and pull off the measuring cables.
Unscrew both screws at the back of the housing.
Remove the rear part of the housing.
Avoid touching the printed circuit board or any parts attached to it, as this may cause damage.
Close the cover and firmly tighten the screws of the housing.

| Warning
To avoid the risk of electric shock, proceed as follows before opening the housing:

Remove the testing probes from the measuring points.
Remove the testing probes from the connection sockets.
Switch the multi-meter off.

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Specifications:

Measuring range for DC voltages V

Set range

| Measuring levels|

Accuracy

200 mV| 100 µV|

+- (0.5 % +5)

2V

| 1 mV| + – (0.8 % +5)
20 V| 10 mV|

+ – (0.8 % +5)

200 V

| 100 mV| +- (0.8 % +5)
Max. 300 V| 1 V|

+ – (1.0 % +5)

Measuring range for AC voltages V ~

Set range| Measuring levels|

Accuracy

200 V

| 100 mV| +- (1.2 % +10)
Max. 300 V| 1 V|

+ – (1.2 % +10)

Measuring range for direct current A

Set range| Measuring levels|

Accuracy

200 µA

| 0,1 µA| +- (1.0 % +5)
2000 µA| 1 µA|

+ – (1.0 % +5)

20 mA

| 10 µA| +- (1.0 % +5)
Max. 200 mA| 100 µA|

+- (1.2 % +5)

Max. 10 A

| 10 mA|

+ – (2.0 % +5)

Overvoltage protection:
Fuse F1: 250mA/300V, fast; Fuse F2: 10A/300V fast Voltage drop during measurements: 200 mV

Measuring range for resistance Ω

Set range| Measuring levels|

Accuracy

200 Ω

| 0,1 Ω| +- (1.2 % +5)
2 kΩ| 1 Ω|

+- (1.2 % +5)

20 kΩ

| 10 Ω| +- (1.2 % +5)
200 kΩ| 100 Ω|

+- (1.2 % +5)

2 MΩ

| 1 kΩ|

+- (1.2 % +5)

Measuring operation

| Warning

Never exceed the maximum permitted input values for current and voltage.
Never grip the test prods outside of the grip area identified with tactile markings while taking a measurement.

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| Risk of electric shock
Only the two measuring cables required for the respective measuring operation may be connected to the measuring device. For safety reasons, remove all measuring cables from the measuring device that are not required.

Voltage measurement „V“

| Warning
Before measuring the voltage, always make sure that the measuring device is not set to the measuring range for current or resistance.
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To measure DC voltages (V ****), proceed as follows:
Switch on the “EM393B” by turning the switch to the largest measuring range (300 V=, DC).
Plug the measuring cables into the measuring sockets according to the colour coding.
Connect the two test prods to the object to be measured (battery, circuit, etc.).
The red test prod corresponds to the positive pole, the black test prod to the negative pole.
The respective polarity of the measured value together with the actual measured value is shown on the display.
Depending on the result, you can now adjust the measuring range by turning the switch.
If you measure the DC voltage and a minus sign “-” is shown in front of the measured value, the measured voltage is negative (or the measuring cables are reversed).
After completing the measuring process, remove the measuring cables from the object to be measured and switch off the “EM393B” (rotary switch in “OFF” position).
To measure AC voltages (V ~), proceed as follows:
Put the “EM393B” into operation as described for the measuring of DC voltage and select the largest measuring range (300 V~, AC).
Connect the two test prods to the object to be measured (generator, circuit, etc.).
The measured value is shown on the display.
Depending on the result, you can now adjust the measuring range by turning the switch.
After completing the measuring process, remove the measuring cables from the object to be measured and switch off the “EM393B” (rotary switch in “OFF” position).

Current measurement „A“

| Warning

The maximum permissible voltage must not exceed 300 V.
Measurements above 200 mA may only be carried out for a maximum of 10 seconds and with a subsequent break of at least 15 minutes between measurements.

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To measure direct currents (A ****, DC), proceed as follows:

Plug the red measuring cable into the 10 A measuring socket (blue, for currents >200 mA) or into the red measuring socket (for currents <200 mA). Plug the black measuring cable into the COM measuring socket.
Select the largest measuring range, i.e., 200 mA for low direct currents; for larger currents, set the selection switch to 10 A.
Connect the two test prods in series to the object to be measured (battery, circuit, etc.); the respective polarity of the measured value together with the actual measured value is shown on the display.
Depending on the result, you can now adjust the measuring range by turning the switch (in this case: direct current less than 20 mA).
After completing the measuring process, remove the measuring cables from the object to be measured and switch off the “EM393B” (rotary switch in “OFF” position)

| Warning

Never measure currents in excess of 10 A in the 10 A range, as this can result in damage to the “EM393B”. Also, never measure currents in excess of 200 mA in the mA range, as this would trip the internal microfuse.
Alternating currents cannot be measured with the “EM393B”!

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Resistance measurement „Ω“

| Warning
Always make sure that all circuitry components, circuits and parts to be measured as well as other objects to be measured are disconnected from the power supply and discharged.
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To measure the resistance “Ω”, proceed as follows:

• Switch on the “EM393B” by turning the switch to the largest measuring range (2 M).
• Plug the measuring cables into the measuring sockets according to the colour coding.
• Check the measuring cables for continuity by connecting the two test prods to one another. This must result in a resistance of about 0.5 ohm (inherent resistance of the measuring cables).
• Then connect both test prods to the object to be measured.
Unless the object has a high resistance or is discontinuous, the measured value appears on the display. Wait until the display has stabilised.
• Depending on the result, you can now adjust the measuring range by turning the switch.
• After completing the measuring process, remove the measuring cables from the object to be measured and switch off the “EM393B” (rotary switch in “OFF” position).

Diode test and continuity check

| Warning
Always make sure that all circuitry components, circuits and parts to be measured as well as other objects to bemeasured are disconnected from the power supply and discharged.
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Switch on the “EM393B” by turning the switch to the diode symbol.

Plug the measuring cables into the measuring sockets according to the colour coding.
Check the measuring cables for continuity by connecting the two test prods to one another. This must result in a value of about 0, and a humming tone must be audible. A measured value of about < 50 ohm is recognized as representing continuity and a continuous tone is emitted.
Connect both test prods to the object to be measured.
After completing the measuring process, remove the measuring cables from the object to be measured and switch off the “EM393B” (rotary switch in “OFF” position).

7.5 Test signal TTL

(Transistor-Transistor Logic):

Function check for transistor control (logic control in digital technology).
Output as 0 (no current) or 1 (current).

Replacing the fuse:

The multimeter is protected by two fuses (F1 250mA/300V fast, Ø 5x20mm and F2 10A/300V, fast, Ø 5x20mm). To replace it, proceed as follows:

Disconnect the measuring device from live components and pull off the measuring cables.
Unscrew both screws at the back of the housing.
Remove the rear part of the housing.
Lift the fuse from its socket with tweezers or a screwdriver.
Insert a new fuse with the same specifications into the socket.
Avoid touching the printed circuit board or any parts attached to it, as this may cause damage.
Close the cover and firmly tighten the screws of the housing.

Cleaning

Before cleaning the device, it is essential that you observe the following safety instructions:

When opening covers or removing parts (unless these can be opened or removed by hand), live parts may be exposed. Before carrying out any cleaning or repair work, the connected cables must be disconnected from the measuring device and all objects to be measured. Switch off the “EM393B”. Do not use carbon-containing cleaning agents, benzines, alcohols or the like for cleaning. These substances have a damaging effect on the surface of the measuring device. Moreover, the vapours are hazardous to health and explosive. Do not use any tools with sharp edges, screwdrivers, metal brushes or the like for cleaning.
To clean the device or the display and the measuring cables, use a clean, lint-free, antistatic and slightly moist cleaning cloth.

Warranty Disclaimer

Hama GmbH & Co KG assumes no liability and provides no warranty for damage resulting from improper installation/ mounting, improper use of the product or from failure to observe the operating instructions and/or safety notes.

Hama GmbH & Co KG
86652 Monheim/ Germany

Service & Support

www.hama.com
+49 9091 502-0

Documents / Resources

| hama EM393B Digital Multimeter [pdf] Instruction Manual
EM393B Digital Multimeter, EM393B, Digital Multimeter, EM393B Multimeter, Multimeter, 081700
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