Mastech M266F Assembly instructions

02
M266F
1. Safety information
DIGITAL CLAMP MULTIMETER
OPERATOR'S INSTRUCTION MANUAL
01 03 0 5
2.1 Function and Range selec tor
A rotary switch is used to measurement functions and
ranges. When the switch is set to OFF position, the
meter does not operate.
FRO N T PA NEL
The meter is completely portable, LCD, 3 1/2 digit clamp
meter with insulation test function (with option 500V
insulation tester unit). It has been designed according
to IEC1010-1 IEC1010-2-032 concerning electro nic
measuring instruments with an overvoltage category
(CAT II 1000V & C AT III 6 00V) an d pollu tion 2 an d safet y
requirements for hand-held current clamps for electrical
measurement and test.
Follow all safety and operating instructions to ensure
that the meter is used safely and is kept in good
operating condition.
1.1 Prelimina ry
When using this meter, the user must observe all normal
safety rules concerning:
Protection against the dangers of electronic current.
Protection of the meter against misuse.
Full compliance with safety standards can be
guaranteed only if used with test leads supplied. If
necessary, th ey must b e repla ced wit h the sam e model
or same electronic ratings. Measuring leads must be in
good condition.
1.2 During Use
Never exceed the protection limit values indicated in
specifications for each range of measurement.
When the meter is linked to measurement circuit, do not
touch unused terminals.
When the value scale to be measured is unknown
beforehand, set the range selector at the highest position.
Before rotating the range selector to change function,
disconnect test leads from the circuit under test.
When carrying out measurements on TV or swit ching
power circuits always remember that there may be high
amplitude voltage pulses at test points, which can
damage the meter. Never perform resistance
measurements on live circuits.
Always is careful when working with voltage above 60V
dc or 30V ac rms. Keep fingers behind the probe barriers
while measuring.
1.3 Symbols
Important safety information, refer to the
operating manual.
Dangerous voltage may be present.
Double insulation ( Protection class II ).
Application around and removal from
HAZARDOUS LIVE conductors is permitted.
Earth ground.
1.4 Maintenan ce
2. Description
This meter is one of a series portable 3 1/2 digital clamp
meter for measuring DC and A C Voltag e, AC curr ent,
resistance, continuity test and insulation test. Some models
also provide frequency or temperature test. Full overload
protection. Low battery indication and over-range indi catio n
are providing. Following table shows function of the serie s
of clamp meter.
FUNCTION
TEMPERATURE
M266 M266F M266C
ACV DCV
ACA
Ω
INSULATION
FREQUENCY
※
※
※
※
※
※
※
※
※
※
※
※
※
※
※
※
※
※
1. TRAN SFORM ER
JAW S
3. DATA HOLD SWITCH
4. TEMP ERATURE
MEASURING SOCKET
2. BARRIER OR
TACT ILE IND ICATOR
5. ROTARY SWITCH
6. LCD DISPLAY
7. DROP-PROOF
WRIST STRAP
8. INPUT JACKS
9. TRIG GER
Pick up the AC current flowing through the conductor.
Press the TRIG GER to op en the tr ansfo rmer ja ws.
When the finger press on the TRI GGER is r eleas ed, the
jaws will close again.
2.3 Data Hold
Depress HOLD Button Switch to toggle in and out of the
Data Hold mode. Releasing Data Hold mode again p ress
the button.
2.2 Transforme r Jaws
2.4 Input Jacks
This meter has three input jacks that are protected
against overload to the limits shown.
During use connect the black test lead to COM jack and
connect red test lead to V jack. The red te st lead i s
depended on function selected.
The EXT jack is us ed for ac cept in sulat ion tes ter uni t
EXT ban ana Plu gs, whe n measu remen t insul ation
resistance.
Ω
3. Operating Instruction
3.1 Measuring C urrent
1. Set the rotary switch at desired A ~ range p ositi on.
Press the trigger to open the transformer jaws and
clamp onto one conductor only (Fig1), The
transformer jaws pick up the AC cur rent fl owing
through the conductor.
04
Before opening the meter, always disconnect test leads
from all sources of electric current.
If any faults or abnormalities are observed, the meter
can not be used any more and it has to be checked out.
Never use the meter unless the back cover and the
battery cover are in place and fastened fully.
Do not use abrasives or solvents on the meter, use a
damp cloth and mild detergent only.
HOLD
BAT
OFF 2000M
20M
2M
200
2k
20
V~
200
2
1000
200
2k
200
750
1000
200
20
A~
EXTERNAL
UNIT
MAX 100 0A~
CAT ll 100 0V
CAT lll 60 0V
266F C LAMP MET ER
Ω
CAT ll 6100V
VΩCOM EXT
CAT ll
750V~
1000V
MAX
Ω
V~
V
WITH 261 OPTION(500V)
INSULATION TESTER
Hz
HOLD
BAT
OFF 2000M
20M
2M
200
2k
20
V~
200
2
1000
200
2k
200
750
1000
200
20
A~
EXTERNAL
UNIT
MAX 1000A ~
CAT ll 1000V
CAT lll 600V
266F CLA MP METE R
Ω
CAT ll 6100V
VΩCOM EXT
CAT ll
750V~
1000V
MAX
Ω
V~
V
WITH 261 OPTION(500V)
INSULATION TESTER
Hz

Range Accuracy
Resolution
2V 1mV
20V 10mV
200V
±0.5% of rdg ±3 digits
0.1V
1000V ±0.8% of rdg ±3 digits 1V
Range Accuracy
Resolution
200V ±1.0% of rdg ±5 digits 0.1V
750V ±1.2% of rdg ±5 digits 1V
Range Accuracy
Resolution
±2.0% of rdg ±2 digits
±4.0% of rdg ±2 digits
±5.0% of rdg ±2 digits
Note
20MΩ
2000MΩ 1MΩ
1kΩ
>500MΩ
< 500MΩ
06 0 7
4.3 Insulatio n Test
(With option 500V insulation tester unit)
Input Impedance: 9M on all ranges
Overload protection: 1000V DC or 750V AC on all ranges
Frequency Range:(50Hz to 400Hz) /≤ 600V;
(50Hz to 200Hz) / 750V.
Response: Average, calibrated in rms of sine wave
≥Ω
Range Accuracy
Resolution
200Ω±1.0% of rdg ±5digits 0.1Ω
2kΩ1Ω
20kΩ
200kΩ
2MΩ
±1.0% of rdg ±8digits
10Ω
100Ω
1kΩ
Display
Terminals and
earth ground
Measuring Method
Overrange Indication
Polarity indication
Operating Temperature
Storage Environment
Power
Accessories
Low Battery Indication
Optional Accessories
Dimension
Weight
3 1/2 digit LCD,
with automatic polarity indication
1000V dc or 750V rms ac (sine)
“1” Figure only in the display
“-” displayed for negative polarity
0°C to 40°C (32°F to 104°F)
9V alkaline or carbon-zinc battery
(6F22 or equivalent )
Operating manual ,set of test leads
“BAT” to left of display
Thermocouple ( K type )
96(W) X 235(D) X 46(H) mm
330g( including battery )
Dual-slope integration A-D converter
-10°C to 50°C (14°F to 122°F)
3.6 Continuit y Test
1. Connect the black test lead to the COM jack and the
red test lead to the V jack. (The polarity of the red
lead is positive“ + ”)
2. Set the rotary switch at position and connect test
leads across two points of the circuit under testing.
If continuity exists (i.e., resistance less than about
100 ), built -in buzzer will sound.
Ω
Ω
10 1 1
Accuracy is specified for a period of one year after calibration
and at 18°C to 28°C (64°F to 82°F) with relative humidity
to 80%.
Frequency Range: 50Hz to 60Hz
Response: Average, Calibrated in rms of sine wave
Overload protection: 1200A within 60 seconds. Jaw Opening:
Ф50mm
HYS007039
2. When only the figure“1”displayed, it indicates overra nge
situation and the higher range have to be selected.
WRONG CORRECT
3.2 Insulatio n Test(O ption 5 00V insulation tester unit)
1. Connect the insulation tester unit VΩ, COM,
EXT thr ee-ba nana pl ugs to th e clamp m eter VΩ,
COM, EXT.
2. Set the rotary switch of clamp meter at 2000MΩ position.
3. Set the insulation tester unit range switch to the
2000MΩ position.
4. Uses the insulation tester unit of the test leads
connects its L, E input connect to being tested
installations. (Test in stall ation 's must b e power O FF)
5. Set the insulation tester power switch to the ON position.
6. Depress the PUSH 500V push-push switch; the 500V
on red LED lamp will light. Clamp meter display reading
is the insulation resistance value. If the reading is
below 19MΩ, change clamp meter and insulation tester
unit to 20MΩ range, can be increasing the accuracy.
7. If the insulation tester unit is not use, the power switch
must shift to power OFF position, and the test leads
must leave the E. L inp ut conn ect. That can be increase
battery life and prevent electrical shock hazard.
3.7 Measuring Temperatu re
1. Set the rotary switch at °C or °F position and the LCD
display will show the current environment temperature.
2. Insert “ K ” type thermocouple into the temperature
measuring socket on the front panel and contact the
object to be measured with the thermocouple probe.
Read LCD display.
WARNING:
To avoid electric shock, be sure the thermocouple has been
removed before changing to another function measuremen t.
3.8 Measuring F requency
1. Connect the black test lead to the COM jack and the red
test lead to the V jack.
2. Set the rotary switch at Hz position and connect test
leads across the source or load under measurement.
NOTE:
1. Reading is possible at input voltage above 10V rms.
but the accuracy is not guaranteed.
2. In noisy environment, it is preferable to use shield
cable for measuring small signal.
Ω
4. Specifications
4.2 AC Cu rrent
Range Accuracy
Resolution
200A
1000A
±2.5% of rdg ±5 digits
±3.0% of rdg ±10 digits
0.1A
1A
4.1 General
4.4 AC Voltage
4.5 Dc Volta ge
Input Impedance: ≥9M
Overload protection: 250Vrms AC for 200mV range,
1000V DC or 750V
Ω
AC for other range.
4.6 Resistanc e
Overload protection: 250V DC or 250Vrms AC on all ranges.
Open circuit voltage: 700mV
4.7 Frequency
08 0 9
Range Accuracy
Resolution
2kHz ±2.0% of rdg ±5digits 1Hz
5. Accessories
COME WITH THE CLAMP METER
Test Leads Model: T3000
Battery 9V 6F22 or equivalent
Operation Manual
6. Battery Replacement
If the sign“BAT”appears on the LCD display, it indicates that
battery should be replaced. Remove the battery cover of case.
Replace the exhausted battery with a new one.
WAR NING
Before attempting to open the battery cover, be sure that test
leads have been disconnected from measurement circuits to
avoid electric shock hazard.
WAR NING
Using this appliance in an environment with a
strong radiated radio-frequency
electromagnetic field (approximately 3V/m)
may influence its measuring accuracy.
3.3 Measuring Voltage
1. Connect the black test lead to the COM jack and the
red test lead to the V jack .
2. Set the rotary switch at the desired V or V range
position and connect test leads across the source or
load under measurement. Th e polar ity of th e red lea d
connection will be indicated along with the voltage
value when making DC voltage measurement.
3. When only the figure“ 1 ”is displayed, it indicates
overrange situation and the higher range has to
be selected.
Ω
1. Connect the black test lead to the COM jack and the
red test lead to the V jack .
2. Set the rotary switch at desired Ω position and connect
test leads across the resistor under measurement.
Note:
1. If the resistance being measured exceeds the
maximum value of the range selected or the input is
not connected, an overrange indication“ 1 ”will
be displayed.
2. When checking in - circuit resistance, be sure the
circuit under test has all power removed and that all
capacitors have been discharged fully.
Ω
3.4 Measuring R esistance
3.5 Testin g Diode
1. Connect the black test lead to the COM jack and the red
test lead to the V jack. (T he pola rity of r ed lead i s“ + ”)
2. Set the rotary switch at position and connect red
lead to the anode, black lead to the cathode of the
diode under testing. The met er will s how the a pprox .
forward voltage of the diode. If the lead connection is
reversed, only figure“ 1 ”displayed.
Ω