Morris 57266 User manual

OPERATOR’S #57266
INSTRUCTION MANUAL
OPEN JAW DIGIT ELECTRICAL TESTER

CONTENTS PAGE
SAFETY INFORMATION.……..………………….
SYMBOL EXPLANATION ………………………...
SAFETY PRECAUTIONS …………………………
MAINTENANCE ...……………………………….…
GENERAL DESCRIPTION ……………………..
PANEL DESCRIPTION ……....……………….…..
OPERATING INSTRUCTIONS ...…..…………….
SPECIFICATIONS ...…...……………..…………...
AUTO POWER OFF………………………………..
REPLACING THE BATTERY..….………………..
ACCESSORIES..………………..………………...
1
2
2
4
4
5
10
15
18
18
19

SAFETY INFORMATION
The open jaw digit electrical tester has been designed
according to IEC1010 – 1 and IEC1010 – 2 – 032
concerning safety requirements for electrical measuring
instruments and hand – held current clamps with an
overvoltage category (CAT III) and pollution 2.
The open jaw digit electrical tester complies with the
requirements of the following European Community
Directives: 89/336/EEC ( Electromagnetic Compatibility )
and 73/23/EEC (Low Voltage) as amended by 93/68/EEC
(CE Marking).
However, electrical noise or intense electromagnetic
fields in the vicinity of the equipment may disturb the
measurement circuit. Measuring instruments will also
respond to unwanted signals that may be present within
the measurement circuit.
Users should exercise care and take appropriate
precautions to avoid misreadings.
-1-

SYMBOL EXPLANATION
Important safety information, refer to the
operating manual.
Dangerous voltage may be present.
Earth ground.
Double insulation (Protection class II).
AC –Alternating Current.
DC – Direct current.
Battery.
Conforms to European Union directives.
SAFETY PRECAUTIONS
Follow all safety and operating instructions to ensure
maximum personal safety during the operation and to
ensure the meter is used safely and is kept in good
operating condition.
-2-

•
•
•
•
•
•
•
Read these operating instructions thoroughly and
completely before operating your meter. Pay
particular attention to WARNINGS, which will
inform you o
f potentially dangerous procedures.
Follow the instructions in these warnings.
Always inspect your meter and test leads for any
sign of damage or abnormality before every use. If
any abnormal conditions exist (i.e. broken test
leads, cracked cases, display not reading, etc.), do
not attempt to take any measurements.
Do not expose the instrument to direct sunlight,
extreme temperature or moisture.
Never ground yourself when taking electrical
measurements. Do not touch exposed metal pipes,
outlets, fixtures,
etc., which might be at ground
potential. Keep your body isolated from ground by
using dry clothing; rubber shoes, rubber mat, or
any approved insulating material.
Always be
careful when working with voltages
above 60V dc or 30V ac rms. Keep fingers behind
the probe barriers while measuring.
Never use the meter to measure voltages that
might exceed the maximum allowable input value
of any function.
Never touch exposed wiring, connections or any
live circuit when attempting to take measurements.
-3-

MAINTENANCE
•
•
•
•
Before opening the case, always disconnect test
leads from all energized circuits.
Never use the meter unless the back cover is in
place and fastened completely.
Do not use abrasives or solvents on the meter.
Clean using a damp cloth and mild detergent only.
Qualified and trained service technicians should
only perform calibration and repair of the meter.
•Do not attempt calibration or service unless trained
and another person capable of rendering first aid
and resuscitation is present.
GENERAL DESCRIPTION
The meter is an autorange professional open jaw digit
electrical tester with 3999 counts. For measuring DC and
AC voltage, AC current, Resistance, Capacitance,
Frequency, duty cycle, Diode and Continuity Test with
battery operated.
-4-

PANEL DESCRIPTION
1.
2.
3.
4.
4.1
4.2
Transformer jaws
Pick up the AC current flowing through the
conductor.
Hold button
When this button is pushed, the display will keep
the last reading and “ ”symbol will appear on
the LCD until pushing it again.
When this button is pressed more than two
second, the light of display is on until pressing it
more than two second again.
Rotary switch
This Rotary Switch is used to select functions
and power supply of the meter on or off.
Function button
F. Func.
In
Ω
range, press this button to select
or
Ω
function. Different symbol of function
will appear on the LCD.
R. Range
Press this button to select auto and manual
range. When
a function with auto and manual
mode is selected, the meter enters auto range at
first. To change to manual range, push this button
once.
-5-

4.3
4.4
5.
When the meter operates in manual ranging
mode, push this button to change range to the
higher one and hold this button for more than 3
seconds to return to auto range mode.
∆
REL
Push the button to get relative measurement
mode, “REL” annunciate display on LCD. But
store the displayed reading as a reference value.
In the Relative mode
, the value shown on the
LCD is always the difference between the stored
reference value and the present reading. If the
new reading is the same as the reference value,
the display will be zero.
% Hz
Push the button to select frequency or duty cycle
measurement.
LCD DISPLAY
-6-

Lowbattery indication
Auto range indication
Relative measurement indication
Hold data indication
DC input indication
AC input indication
Diode test indication
Continuity indication
Polarity indication
n
µ
F
Capacitance measurement unit
kM
Ω
Ohm measurement unit
Hz
Frequency measurement unit
mVA
Current measurement unit
%
Duty cycle measurement indication
6.
7.
“V
Ω
Hz” jack
This is positive input terminal for volt, diode,
resistance，frequency, duty cycle and capacitance
measurement connection is made to it using the
red test lead.
“COM” jack
This is negative (ground) input terminal for all
measurement modes except current. Connection
is made to it using the black test lead.
-7-

LAYOUT (FORWARD)
-8-

LAYOUT (BACKWARD)
-9-

OPERATING INSTRUCTIONS
DC VOLTAGE MEASUREMENT
1.
2.
3.
4.
5.
6.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired V position. Select
the desired DC voltage range, or set automatic
range.
When the magnitude of voltage to be measured is
unknown, always start with the highest range.
Connect the test lead tips in parallel with the circuit
to be measured. Be careful
not to touch any
electrical conductors.
The polarity of the red lead connection will be
indicated along with the voltage value.
Read the measure result directly from the display.
AC VOLTAGE MEASUREMENT
1.
2.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired V~ position. Select the
desiredAC voltage range, or set automatic range.
When the magnitude of voltage to be measured is
unknown, always start with the highest range.
-10-

3.
4.
Connect the test lead tips in parallel with the circuit
to be measured. Be careful not to touch any
electrical conductors.
Read the measure result directly from the display.
AC CURRENT MEASUREMENT
1.
2.
3.
Set the rotary switch at A~ position.
Clamp one conductor in Transformer jaws, making
sure that the jaw is around the conductor.
Read the measure result directly from the display.
RESISTANCE MEASUREMENT
1.
2.
3.
4.
5.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired
Ω
position.
Push F.FUNC. button to select Ω.
If the resistance being measured exceeds the
maximum value of the range selected or the input
is not connected, an overrange indication “OL” will
be display and the higher range has to be selected.
Read the measure result directly from the display.
-11-

NOTE:
1.
If the resistance being measured exceeds the
maximum value of the range selected or the input is
not connected, an over range indication “OL ”will
be displayed.
2.
3.
4.
When checking in-
circuit resistance, be sure the
circuit under test has all power removed and that all
capacitors have been discharged fully.
For measuring resistance above 1MΩ, the meter
may take a few seconds to get a
stable reading.
This is normal for high resistance measurements.
When the input is not connected, i.e. at open circuit,
the figure “OL” will be displayed for the overrange
condition.
DIODE MEASUREMENT
1.
2.
3.
4.
5.
6.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired
Ω
position.
Push F.FUNC. button to select .
The red lead should be connected to the anode
and the black lead to the cathode of the diode.
The typical voltage drop should be about 0.6V for
silicon diode or 0.3V for germanium diode.
If the diode is reverse biased or there is an open
circuit the reading displayed will be “OL”.
-12-

CONTINUITY TESTING
1.
2.
3.
4.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired
Ω
position.
Push F.FUNC. button to select .
If continuity exists (i.e., resistance less than 30Ω)
built – in buzzer will sound.
CAPACITANCE MEASUREMENT
1.
2.
3.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Turn the rotary switch to position.
Connect test leads across the capacitor under
measurement and be sure
that the polarity of
connection is observed (Note: The polarity of the
red lead connection is positive “+”).
Read the measure result directly from the display.
MEASURING FREQUENCY
NOTE:
The input voltage should be between 1V and 10V rms. ac.
If the voltage is more than 10V rms. Reading may be out
of the accuracy range.
-13-

1.
2.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired Hz position.
3.
4.
5.
6.
Push % Hz. button to select frequency mode and
connect the test lead tips in parallel with the circuit
to be measured. Be careful not to touch any
electrical conductors.
The signal amplitude must also be greater than the
sensitivity level.
Determine that the amplitude level of the signal to
be measured is not greater than the input voltage
limit (250V DC/AC rms.).
Read the measure result directly from the display.
DUTY CYCLE TEST
1.
2.
3.
4.
Insert the black and red test leads into the COM
and V
Ω
Hz input terminals respectively.
Set rotary switch at desired Hzposition.
Push % Hz. button to select % mode and connect
the test lead tips in parallel with the circuit to be
measured. Be careful not to touch any electrical
conductors.
Read the measure result directly from the display.
-14-

SPECIFICATIONS
Accuracy is given as ±(% of reading + number of least
significant digits) at 18℃to 28℃, with relative humidity up
to 80%.
All specifications assume less than 1 year since
calibration.
GENERAL
Maximum voltage
: CAT III 600V.
Display
: LCD3999 counts. updates 2-3/sec.
Ranging method
:Auto / Manual
Polarity indication
: “
−
” displayed for negative polarity
Overrange
indication : Only figure “OL” on the display
Jaw capability
: 12mm (Max conductor size)
Power : Battery 9V IEC 6F22 JIS 006P
NEDA 1604 type.
Low battery
: “ ” appears on the display
Operating
: 0℃to 40℃
Storage temperature
: -10℃to 50℃
Temperature
coefficient
: 0.1×specified accuracy) /
℃
( <18℃or >28℃)
Altitude
: 2000m
Size
: 192mm×68mm×43mm
Weight
:Approx. 230g.
-15-

DC VOLTAGE
Range Resolution Accuracy
4V
1mV
±0.7% of rdg ±1 digit
40V 10mV
400V 0.1V
1000V 1V ±0.8% of rdg ±3 digits
Input Impedance: 10MΩ
Overload Protection: 1000V DC or 700V AC RMS
AC VOLTAGE
Range Resolution Accuracy
4V
1mV
±0.8% of rdg ±5 digits
40V 10mV
400V 0.1V
700V 1V ±1.0 % of rdg ±10 digits
Input Impedance: 10MΩ
Frequency range: 40Hz to 400Hz.
Overload Protection: 1000V DC or 700V AC RMS
AC CURRENT
Range Resolution Accuracy
200A 0.1A ±3.0 % of rdg ±3 digits
Overload Protection: 240Afor 60 seconds maximum.
Frequency range: 50Hz to 400Hz.
-16-

RESISTANCE
Range Resolution Accuracy
400Ω0.1Ω
±1.2% of rdg ±1 digit
4kΩ1Ω
40k
Ω
10
Ω
400kΩ0.1kΩ
4MΩ1kΩ
40MΩ10kΩ±2.0% of rdg ±3 digits
Overload Protection: 250V dc or rms. ac for all ranges.
CAPACITANCE MEASUREMENT
Range Resolution Accuracy
40nF 10pF
±4.0% of rdg ±10 digits
400nF 0.1nF
4
µ
F
1nF
40
µ
F
10nF
−
Overload Protection: 250V dc or rms. ac for all ranges.
FREQUENCY MEASUREMENT
Range Resolution Accuracy
40Hz 0.01Hz
±2.0% of rdg ±1 digit
400Hz 0.1Hz
4kHz
1Hz
40kHz 10Hz
100kHz 0.1kHz -17-

Measurement range: 1V to 10V rms. 10Hz to 100kHz.
AUDIBLE CONTINUITY AND DIODE
Range Description
If continuity exists (about less than 30Ω
),
built-in buzzer will sound.
Show the approx. Forward voltage of the diode.
Duty cycle: 0.1% to 99.9%
AUTO POWER OFF
To extend the battery life, Auto Power Off function is
provided. If no key operations of range changing happen
in about 30 minutes, the meter will be turned off
automatically. To turn it on, rotate the rotary switch or
push any function button.
REPLACING THE BATTERY
WARNING
To avoid electrical shock or personal injury, remove
the test leads and any input signals before replacing
the battery. Replace only with same type of battery.
-18-