IEK MAS838L Digital Multimeter Instruction Manual

IEK MAS838L Digital Multimeter

DIGITAL MULTIMETERS MAS830L, MAS838L MASTER SERIES

Basic information about the product

Digital multimeters MAS830L, MAS838L MASTER series of IEK trademark (hereinafter referred to as multimeters) equipped with 3 ½ digits LCD display. The devices perform the following functions:

• measurement of DC strength ;
• measurement of DC voltage values ;
• measurement of AC voltage ;
• measurement of electrical resistance ;
• measurement of capacitance of capacitors ;
• check of diodes and transistors test ;
• check of circuit continuity (sound continuity test) ;
• temperature measurement ;
• generation of signals with frequency of 50 Hz (square signal) –

Multimeters conform to the requirements LVD Directive No. 2014/35/EU,

EMC Directive No. 2014/30/EU and EN 61010-1, EN 61010-2-030, EN 61326-1, EN 61326-2-2.

Front panel elements are shown in the figure 1.

1.  3 ½ digits LCD, height of characters 12.7 mm. Display shows measurement results in digital form.

2. Display backlight button “BACK LIGHT”. When you press this button, the backlight turns on. The backlight automatically blinks off in 15 seconds.
   To switch on the backlight, press the button again.

3. Rotary range switch is used to select the functions and the limit of measurement, as well as to enable/disable the device. The multimeter does not work when the switch is in the “OFF’ position.

4. “HOLD” button. When you press this button, the display “holds” the measurement indications and an icon appears on the display until the button is not pressed again.

5.  Input jack “10 A” to connect the positive polarity probe when measuring the current strength up to 10 A.

6. Sockets for measuring the amplification gain of transistors hFE.

7. “COM” input jack to connect the negative polarity probe.

8. “VnmA” input jack to connect the positive polarity probe when measuring the voltage, resistance and current strength (except for 10 A range).

9. Holster. Enables you to easily set the multimeter on the table, fix the probes and is used for additional protection during operation.
   Figure 1 – Elements of multimeters front panel

Technical characteristics

Main technical pararnetets are presented in the table 1.

Table 1

Teclmical specilications of the multimeter MAS830L model are presented in the table 2.

Table 2

FUNCTION :

Technical specifications of the multimeter MAS838L model are presented in the table 3,

Table3

FUNCTION:

Technical characteristics of the 6020 stylus set are presented in tl1e tatJle 4,

Table 4

Complete set

he scope of multimeter delivery is presented in the table 5,

Table 5

Optionally the scope of MAS838L multimeter delivery includes a thermocouple type “K”: TP-0 1 A-1 Pcs,

Stylus set is presented in the table 6 (purchased separately), Stylus specifications are given in section 2,

Table6

Safety information

Measures for the protection against electric shock
When working with the digital multimeters follow all the rules of work with the device and salety instructions to avoid the risk ol electric shock:
do not use the multimeter if its casing is damaged. Pay special attention to the connection jacks; use original probes for this model of multimeter; do not use (Refective prohes. Regularly check the isolation of prohes, if necessary, replace the probes with those of the same model or same electric parameters; do not exceed the t11reshold values listed in the table 7;

Table 7

• if tile value measured is not known beforehancl, set the maximum range; do not touch the unused jacks when the multimeter is connected to a measured circuit;
• do not use the multimeter when the back cover is not closed or the casing is loosely closed; connect the test probe after connecting the basic one. Disconnect them in reverse order;
• do not measure the resistance in the circuit uncler tension;
• to avoid t11e risk of electric sl1ock due to incorrect readings, replace the hattery irmnediately when the “ ” icon appears; always be careful when working with voltages over 42 V, when making measurements keep yow fingers behind the barrier edge of probes.

Measures to protect the multimeter against improper use
To avoid the damage to the multimeter; follow these guidelines:

• To avoid the damage to the multimeter, follow these guidelines:
  – disconnect the power and discharge the high-voltage capacitors when
  measuring the electrical resistance, checking the circuits integrity and diodes;
  – use the jacks, functions and ranges of measurements in accordance with
  the regulations;

• – before turning the range switch to change functions and ranges of
  measurement, disconnect the measuring probes from the tested circuit;
  – when working with television receivers, monitors and pulsed power sources
  remember that in some points of their electrical circuits there is a high voltage
  pulse amplitude that can damage the multimeter;
  – protect the multimeter from direct sunlight, high temperature and humidity.
  Safety symbols are presented in the table 8.

Table8

Care and maintenance

ATTENTION

• In the case of breaches of service regulations specified by the manufacturer the protection of this device can be compromised.
• If malfunctions or errors occur in the work of the multimeter immediately discontinue its use.
• Check of work and repairs must be carried out in special workshops.
• Wipe the multimeter with a soft cloth, do not use abrasives or solvents for cleaning. Electronic circuit of the multimeter does not need to be cleaned.

Storage after operation

During storage after operation, please observe the following recommendations:

• disconnect the test probes from the multimeter;
• make sure that the multimeter and accessories are dry;
• if for a long time, you are not going to use the multimeter, remove the battery, otherwise it may leak and pull the device out of order.

How to work with multimeter

Measurement of DC strength
When measuring the current strength up to 200 mA, insert the connector of black test probe into the “COM” jack, and insert the connector of red test probe into the “VSmA” jack. The polarity of the red probe is considered positive.
If you suspect that the measured current is within the range from 200 mA to 10 A, you must insert the red probe into the “10 A” jack.
Use the rotary switch to select the desired limit of DC A -. Shut off the circuit to be measured and connect the test probes of the device in series on load which is used to measure the current.
Read the indications of magnitude and polarity of the measured current strength on the display.
Upon completion the work, set the rotary switch in the “OFF” position.

Notes

1. If the current value is not known beforehand. set the limits switch to the position 10 A (insert the red probe into the jack “10 A”), and then, switching to smaller limits, adjust the required accuracy of measurements.
2. If the display shows only the digit “1” in the left digit, it means that there is an overload and it is necessary to set the range switch to a higher volume.

Measurement of DC and AC voltage
Insert the connector of black test probe in “COM” jack and insert the connector of red test the probe into “VS2mA” jack. The polarity of the red probe is considered positive.
With the use of the rotary switch select the desired limit of measurement of DC V-. or AC V~ voltage.
Connect the test probes in parallel to the voltage source or load.
On the display read the indications of value and polarity of the measured voltage.
Upon completion the work, set the rotary switch in the “OFF” position.

Notes

1. When you install the switch in position “600 V”, “HV” and “4” signs will appear on the display, reminding of the work with high voltage. Caution is required.
2. If the voltage is not known beforehand, set the switch of limits to the position of maximum voltage, then, switching to smaller limits, adjust the required accuracy of measurements.
3. If the display shows only the digit “1” in the left digit, it means that there is an overload and it is necessary to set the range switch to a higher volume.

Measurement of electrical resistance

• Insert the connector of black test probe in “COM” jack and insert the connector of red test the probe into “VSmA” jack. The polarity of the red probe is considered positive.
• Select the desired measuring range of resistance “” with the rotary switch.
• Connect the test probes to different ends of the conductor to be measured and read the display indications.
• Upon completion the work, set the rotary switch in the “OFF” position.

ATTENTION

• If the measured resistance is found in the circuit, before the measurements turn the power off and discharge all the containers in the circuit.
  Note – If the measured resistance value is greater than the maximum value of the selected measure limit, the display will show the digit “1” in the higher order.

Check of circuit continuity (sound continuity test) Insert the connector of black test probe in “COM” jack and insert the connector of red test the probe into “VSmA” jack. Turn the rotary switch to “•) ” position. Connect the test probes to two points of the circuit to be checked. If the resistance is less than 1.5 kOhm, you hear a sound signal. Upon completion the work, set the rotary switch in the “OFF” position.

Diode check
Insert the connector of black test probe in “COM” jack and insert the connector of red test the probe into “VSmA” jack. The polarity of the red probe is considered positive. Set the function switch to “-»* ” position. Connect the red probe to the anode of the diode and the black probe to the cathode. Read on the display the approx. forward voltage drop of the diode when the flow of direct current through it. If the polarity of the diode is reversed, then the display will show the digit “1” in the left order. Upon completion the work, set the rotary switch in the “OFF” position.

Transistor test
Set the switch in “hE” position.
Determine the type of transistor as NP or PNP and determine the outlets of emitter, base and collector. Correctly insert the transistor connector into the corresponding jacks on the front panel: “E” – emitter, “B” – base, “C” – collector of the transistor.
On the display read the approximate hE value at the current of the base of 10 MA and Vce voltage of 3 V.
Upon completion the work, set the rotary switch in the “OFF” position.

NOTE – Before the transistor testing remove the probes from the multimeter jacks.

Temperature measurement (only for M838L model)
Set the range switch to “TEMP” position, and the indicator will show the ambient air temperature.
Connect the thermocouple of “K” type to the jack on the front panel of the device.
Press the thermocouple to the object to be measured and read on the display the temperature value in Celsius degrees.
Upon completion the work, set the rotary switch in the “OFF” position.

ATTENTION

To avoid electrical shock while changing the functions and measurement range, make sure that the thermocouple is removed from the jack of the device.

Replacing the battery and fuse
If the display indicates the symbol “ “, you must replace the battery.
To replace the battery, remove the screws on the back cover of the multimeter.
Remove the back cover from the multimeter casing.
Remove the dead batterv and install a new one as per the specs: 9 V “KRONA” type (NEDA 1604, 6F22). Replace the back cover, tighten the screws.

ATTENTION

Before opening the back cover of the multimeter, make sure that the probes are disconnected from the tested devices and range switch is in the “OFF” position.
When installing a new battery observe the correct polarity.
The fuse goes down only in the event of a heavy and prolonged overloading of the device due to the erroneous selection of measurina ranges To replace the fuse remove the back cover of the multimeter as and when you replace the batteries, then replace the fuse by a new one of the type: 500 mA/250 V. Close the casing.

ATTENTION

To prevent the risk of fire, use fuses with current/voltage values similar
to the values of the current/voltage of the fuse installed at the factory.

Transportation, storage and disposal

1. Transportation of multimeters is allowed by any kind of enclosed transport ensuring protection of packaged multimeters from mechanical damage, dirt, and moisture.
2. Transportation of multimeters with regard to the influence of mechanical factors is to be carried out at a temperature from -10 °C to +35 °C.
3. Storage of multimeters is to be carried out in the manufacturer’s package in rooms with natural ventilation at an ambient temperature from -10 °C to + 45 °C and relative humidity not more than 80 %.
4. Multimeters shall not be disposed as household waste. In order to dispose handle the device to a specialized company for recycling in accordance with the legislation of the Russian Federation.
5. Remove the battery before disposal of the device. You can deliver the batteries to the specialized collection points responsible for collection of this type of waste, at the place of residence.

During the period of warranty and in case of claims, contact your dealer or responsible organization:

Asian countries
Republic of Kazakhstan «TH IEK.KAZ» LLP 71A mkr. Akzhol, s. Irgeli, Karasaiskiy district, Almaty region, 040916
Tel.: +7 (727)) 237-92-49, 237-92-50
infokz@iek.ru
www.iek.kz

Europe
Republic of Latvia SIA “IEK Northern Europe”
Address: Maskavas iela 497, Rumbula, Stopinu pagasts, Ropazu novads, LV-2121, Latvija
Tel: +371 67205159,
Mob: +371 28684723
E-mail: infoneu@iek.group
www.iek.group

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