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 position and connect the red lead to the anode and the black lead to the cathode of the diode under test. The meter
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 position and connect the test leads across the two points of the circuit under test. If continuity exists (i.e. resistance less
than 50
Ω
) the built-in buzzer will sound.
3.8.
MEASURING TEMPERATURE
3.8.1.
Set the rotary switch to the
O
C position and the LCD display will show the ambient temperature.
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.
p
WARNING!
To avoid electric shock, ensure that the thermocouple has been removed before changing to another function measurement.
5. MAINTENANCE
4. SPECIFICATION
6. DECLARATION OF CONFORMITY
p
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 appears on the LCD display, it indicates that the battery should be replaced. Remove the meter from the outer
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
MM30/L - Set of Leads
For Jack Sealey Ltd. Sole UK importer of Sealey Professional Tools.
MM302.V2 - 1 - 210904
01284 757500
01284 703534
E-mail:
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.
Sole UK Distributor,
Sealey Group,
Bury St. Edmunds, Suffolk.
Declaration of Conformity
We, the sole UK importer, declare that the product listed below is in conformity with the following standards and directives.
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.
DIGITAL MULTIMETER
Model: MM.302.V2
89/336/EEC EMC Directive
Signed by Mark Sweetman
1st September 2004
DC VOLTAGE
Range
Accuracy Resolution
200mV
±0.5% of reading ±1 digit
0.1mV
2V
±0.5% of reading ±1 digit
1mV
20V
±0.5% of reading ±1 digit
10mV
200V
±0.5% of reading ±1 digit
0.1V
1000V
±0.8% of reading ±2 digits
1V
Input impedance:
10M
Ω
for all ranges.
AC VOLTAGE
Range
Accuracy Resolution
200mV
±1.2% of reading ±3 digits
0.1mV
2V
±0.8% of reading ±3 digits
1mV
20V
±0.8% of reading ±3 digits
10mV
200V
±0.8% of reading ±3 digits
0.1V
700V
±1.2% of reading ±3 digits
1V
Input impedance:
10M
Ω
for all ranges.
Frequency range:
40 - 400Hz
Response: Average, calibrated in rms of sine wave.
RESISTANCE
Range
Accuracy Resolution
200
Ω
±0.8% of reading ±3 digits
0.1
Ω
2k
Ω
±0.8% of reading ±1 digit
1
Ω
20k
Ω
±0.8% of reading ±1 digit
10
Ω
200k
Ω
±0.8% of reading ±1 digit
100
Ω
2M
Ω
±0.8% of reading ±1 digit
1k
Ω
20M
Ω
±1.0% of reading ±2 digits
10k
Ω
200
M
Ω
±5.0% of (rdg - 10) ±10 digits
100k
Ω
On 200 M
Ω
range,if short input the display will
read 1M
Ω,
this should be subtracted from the
measurement results.
DC CURRENT
Range
Accuracy
Resolution
20µA
±0.8% of reading ±1 digit
0.01µA
200µA
±0.8% of reading ±1 digit
0.1µA
2mA
±1.5% of reading ±1 digit
1µA
20mA
±2.0% of reading ±5 digits
10µA
200mA
±1.5% of reading ±1 digits
0.1mA
2A
±2.0% of reading ±3 digits
1mA
10A
±2.0% of reading ±5 digits
10mA
Overload protection: 0.2A/250V fuse.
10A range unfused.
AC CURRENT
Range
Accuracy Resolution
200µA
±0.8% of reading ±3 digits
0.1µA
2mA
±1.0% of reading ±3 digits
1µA
20mA
±1.0% of reading ±3 digits
10µA
200mA
±1.8% of reading ±3 digits
0.1mA
2A
±2.0% of reading ±5 digits
1mA
10A
±3.0% of reading ±7 digits
10mA
Frequency Range: 40Hz to 400Hz.
Response: Average calibrated in rms sine wave.
CAPACITANCE
Range
Accuracy Resolution
2nF
±4.0% of reading ± 3 digits
1pF
20nF
±4.0% of reading ± 3 digits
10pF
200nF
±4.0% of reading ± 3 digits
0.1nF
2µF
±4.0% of reading ± 3 digits
1nF
20µF
±4.0% of reading ± 3 digits
10nF
Range Accuracy
Resolution
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 ±1on 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
O
C to 28
O
C with a relative humidity of 80%.
-20° to 0°C 0° to 400°C 400°C to 1000°C
1°C
-20°C
to
1000°C
± 5.0% of
rdg ± 4
digits
± 1.0% of
rdg ± 3
digits
± 2.0% of rdg
TEMPERATURE
