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3.5.
DIODE TESTING
3.5.1.
Connect the black lead to the 'COM' input socket and the red lead to to the V/Ω input socket (the polarity of the red lead is '+').
3.5.2.
Set the rotary switch to the '
will show the approximate forward voltage of the diode. If the leads are reverse connected, only '1' is displayed.
3.6.
TRANSISTOR TESTING
3.6.1.
Set the rotary switch to the 'hFE' position.
3.6.2.
Determine whether the transistor to be tested in NPN or PNP type and locate the Emitter, Base and Collector leads. Insert leads of the transistor into
the correct holes in the transistor testing socket.
3.6.3.
The meter will show the approximate hFE value at test conditions of base current 10µA and Vce 3.2V.
3.7.
CONTINUITY TEST
3.7.1.
Connect the black lead to the 'COM' input socket and the red lead to the V/Ω input socket (the polarity of the red lead is '+').
3.7.2.
Set the rotary switch to the '
than 50Ω) the built-in buzzer will sound.
3.8.
MEASURING TEMPERATURE
3.8.1.
Set the rotary switch to the '
3.8.2.
Insert the 'K' type thermocouple plug into the temperature socket on the front panel and touch the object to be measured with the thermocouple probe.
WARNING! To avoid electric shock, ensure that the thermocouple has been removed before changing to another function measurement.
!
4.
SPECIFICATION
RESISTANCE
Range
Accuracy
200Ω
±0.8% of reading ±3 digits
2kΩ
±0.8% of reading ±1 digit
20kΩ
±0.8% of reading ±1 digit
200kΩ
±0.8% of reading ±1 digit
2MΩ
±0.8% of reading ±1 digit
20MΩ
±1.0% of reading ±2 digits
200MΩ ±5.0% of (rdg - 10) ±10 digits
On 200 MΩ range,if short input the display will
read 1MΩ, this should be subtracted from the
measurement results.
CAPACITANCE
Range
Accuracy
2nF
±4.0% of reading ± 3 digits
20nF
±4.0% of reading ± 3 digits
200nF
±4.0% of reading ± 3 digits
2µF
±4.0% of reading ± 3 digits
20µF
±4.0% of reading ± 3 digits
DC VOLTAGE
Range
Accuracy
200mV
±0.5% of reading ±1 digit
2V
±0.5% of reading ±1 digit
20V
±0.5% of reading ±1 digit
200V
±0.5% of reading ±1 digit
1000V
±0.8% of reading ±2 digits
Input impedance:
10MΩ for all ranges.
4.1.
Accuracy Calculation
Example: Test reading on 200Vdc range is 56.4V. Accuracy is '±0.5% of reading ±1 digit'.
Reading ±1 digit = 56.4 ±1 on the last figure i.e. 56.3 to 56.5V.
±0.5% on this range gives 56.3 - 0.5% to 56.5 + 0.5% or 56.0 to 56.8V. Therefore the actual voltage lies between 56.0 and 56.8V.
Note:
Accuracy is specified for a period of one year after calibration and at 18
5.
MAINTENANCE
WARNING! Before attempting to open the case, ensure that test leads have been disconnected from measurement circuits to avoid electric shock hazard.
!
5.1.
For continued protection against fire, replace fuse only with another of the same rating (F200mA/250V Quick Acting). Fuse is located under the circuit board. To
gain access to the fuse remove the three screws from the rear of the meter, lift of the rear cover and gently lift the circuit board from the front cover, replace the fuse
and re-asemble in reverse order..
5.2.
If the battery sign '
protective casing. Remove the rear cover retaining screws and lift off the back cover. Replace the battery. (9V PP3)
5.3.
SPARE PARTS
MM19/F - Fuse, 200mA
6.
DECLARATION OF CONFORMITY
Declaration of Conformity We, the sole UK importer, declare that the product listed below is in conformity with the following standards and directives.
DIGITAL MULTIMETER
Model: MM.302.V2
89/336/EEC EMC Directive
93/68/EEC CE Marking Directive
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this equipment.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
' position and connect the red lead to the anode and the black lead to the cathode of the diode under test. The meter
' position and connect the test leads across the two points of the circuit under test. If continuity exists (i.e. resistance less
C' position and the LCD display will show the ambient temperature.
O
AC VOLTAGE
Resolution
Range
0.1Ω
200mV
1Ω
2V
10Ω
20V
100Ω
200V
1kΩ
700V
10kΩ
Input impedance:
100kΩ
Frequency range:
Response: Average, calibrated in rms of sine wave.
DC CURRENT
Range
20µA
200µA
Resolution
2mA
1pF
20mA
10pF
200mA
0.1nF
2A
1nF
10A
10nF
Overload protection: 0.2A/250V fuse.
Resolution
TEMPERATURE
0.1mV
Range
1mV
10mV
0.1V
-20°C
1V
to
1000°C
' appears on the LCD display, it indicates that the battery should be replaced. Remove the meter from the outer
MM30/L - Set of Leads
Sole UK Distributor
Sealey Group,
Bury St. Edmunds, Suffolk.
Accuracy
Resolution
±1.2% of reading ±3 digits
±0.8% of reading ±3 digits
±0.8% of reading ±3 digits
±0.8% of reading ±3 digits
±1.2% of reading ±3 digits
10MΩ for all ranges.
40 - 400Hz
Accuracy
Resolution
±0.8% of reading ±1 digit
±0.8% of reading ±1 digit
±1.5% of reading ±1 digit
±2.0% of reading ±5 digits
±1.5% of reading ±1 digits
±2.0% of reading ±3 digits
±2.0% of reading ±5 digits
10A range unfused.
Accuracy
-20° to 0°C 0° to 400°C 400°C to 1000°C
± 1.0% of
± 5.0% of
± 2.0% of rdg
rdg ± 4
rdg ± 3
digits
digits
C to 28
C with a relative humidity of 80%.
O
O
The construction file for this product is held by the Manufacturer and may be inspected,
by a national authority, upon request to Jack Sealey Ltd.
Signed by Mark Sweetman
For Jack Sealey Ltd. Sole UK importer of Sealey Professional Tools.
01284 757500
01284 703534
AC CURRENT
Range
0.1mV
200µA
±0.8% of reading ±3 digits
1mV
2mA
±1.0% of reading ±3 digits
10mV
20mA
±1.0% of reading ±3 digits
0.1V
200mA
±1.8% of reading ±3 digits
1V
2A
±2.0% of reading ±5 digits
10A
±3.0% of reading ±7 digits
Frequency Range: 40Hz to 400Hz.
Response: Average calibrated in rms sine wave.
0.01µA
0.1µA
1µA
10µA
0.1mA
1mA
10mA
Resolution
1°C
www.sealey.co.uk
Web
sales@sealey.co.uk
email
Accuracy
Resolution
0.1µA
1µA
10µA
0.1mA
1mA
10mA
9th August 2006
MM302.V2 - 2 - 090806
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