Delton 770J User manual

DIGITAL AUTO MOTIVE ANALYSER
770J / 770K

1
Thank you for purchasing the product. Manufactured to a high
standard this product will, if used according to these instructions
and properly maintained, give you years of trouble free
performance.
1.1 PERSONAL PRECAUTIONS
√When using this multimeter, please observe all normal safety rules
concerning:
Protection against the dangers of electrical current.
Protection of the meter against misuse.
√Full compliance with safety standards can only be guaranteed if
used with the test leads supplied. If necessary, they must be
replaced with genuine The test leads supplied with the same
electronic ratings.
Failure to do so will invalidate the warranty.
× DO NOT use leads if damaged or if the wire is bared in any way.
×DO NOT use the meter if it has been damaged.
1.2 GENERAL SAFETY INSTRUCTIONS
WARNING! USE EXTREME CAUTION when working with high
voltages.
√Familiarise yourself with the application and limitations of the
multimeter as well as the potential hazards.
IF IN ANY DOUBT CONSULT A QUALIFIED ELECTRICIAN.
1. SAFETY INSTRUCTIONS
IMPORTANT: PLEASE READ THESE INSTRUCTIONS
CAREFULLY. NOTE THE SAFE OPERATIONAL
REQUIREMENTS, WARNINGS & CAUTIONS. USE THE
PRODUCT CORRECTLY AND WITH CARE FOR THE
PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO
SO MAY CAUSE DAMAGE AND/OR PERSONAL INJURY
AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP
THESE INSTRUCTIONS SAFE FOR FUTURE USE.

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√
Before commencing testing, follow instructions below and select
the correct input sockets, function and range on the multimeter.
√
When the meter is connected to a circuit, do not touch any unused
meter terminals.
√
When the magnitude of the value to be measured is unknown
beforehand, set the range selector to the highest value available.
√
Before rotating the range selector to change functions, disconnect
test probes from the circuit under test.
WARNING! Never perform resistance, transistor, diode or
continuity measurements on live circuits.
√
Always take care when working with voltages above 35V DC or 25V
AC rms. These voltages are considered a shock hazard.
√
Always keep fingers behind the probe barriers whilst measuring
and DO NOT use when hands are wet.
×
DO NOT touch the test leads, tips or the circuit being tested.
√
Choose the proper range and function for the required
measurement. Do not try voltage or current measurements that
may exceed the ratings marked on the Function/Range switch.
√
When testing for the presence of a voltage or current, make sure
the meter is functioning correctly. Take a reading of a known voltage
or current before accepting a zero reading.
×
DO NOT test voltages above 1000V DC or 750 AC rms the circuitry
of the multimeter will be destroyed.
WARNING! NEVER connect the multimeter to a voltage source /
live circuit when the rotary switch is set to any other function apart
from Voltage testing..
WARNING! Voltage checks on electrical outlets can be difficult and
misleading because of the uncertainty of connection to the
recessed electrical contacts. Other means should be used to
ensure that the terminals are not “live”.
√
Avoid damaging the meter when testing voltage. Disconnect the
test leads from the test points before changing functions.
×
DO NOT attempt a voltage measurement with the test leads in the
20A or the mA terminal.
√
ALWAYS discharge filter capacitors in power supplies and

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disconnect the power when making resistance or diode tests.
× DO NOT use the multimeter in a potentially explosive atmosphere
or where flammable material is present.
√ ONLY operate the multimeter when the back cover is in place and
fastened securely.
√ If any abnormal readings are observed, the multimeter must be
checked out by an authorised technician.
√ ALWAYS turn off the multimeter and disconnect the test leads,
before opening the back cover to replace the fuse or battery.
√ When not in use, store the multimeter carefully in a safe, dry,
childproof location out of direct sunlight. If storing for a long period
of time, remove the battery. Storage temperature range: -15°C to
50°C.
Note: The warnings, cautions and instructions referred to in this manual
cannot cover all possible conditions and situations that may occur.
It must be understood that common sense and caution are factors
which cannot be built into this product, but must be applied by the
operator.
WARNING! Engines produce carbon monoxide which is odourless
and causes slower reaction time which could lead to serious injury.
An engine which is operating should be in a well ventilated area, or
the vehicle's exhaust should be connected to an adequate fume
removal system.
√When working on a vehicle which is being tested or repaired ensure
that the handbrake is on and the front wheels are chocked to avoid
the vehicle moving and causing injury.
√ Wear suitable eye protection when testing or repairing a vehicle.
√ When measuring current, connect the meter in series with the load.
√ Disconnect the live test lead before disconnecting the common test
lead.
√ The mA and the 20A terminals are protected by fuses. To avoid
possible injury or damage, use only in circuits limited to 800mA or
20A for 30 seconds.
√ To maintain the accuracy of the meter, replace the discharged
battery immediately when the symbol ‘ ' appears on the meter
display.
√ Avoid measurement errors from outside interference. Keep the
meter away from spark plug and coil wires.
√ Exceeding the electrical limits of this meter is dangerous and
will expose you to serious or possibly fatal injury. Carefully
read and understand the specification limits of this meter
together with the warnings and cautions in this safety section.

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2.INTRODUCTION & SPECIFICATION
FUNCTION TERMINAL INPUT LIMIT
DC/AC Volts,1Ohm/Continuity/Diode,
CAP., Hz, % Duty, ms Dwell, RPM VΩHz
CAT III 1000V
DC, 750V AC
rms
AC/DC Current, Type-K TEMP. mA T+ 600mA DC/AC
AC/DC 20A 20A *20A DC/AC
* 20 Amp measurement for 30 seconds maximum.
Ohms can not be measured if voltage is present, ohms can be measured
only in a non-powered circuit. However, the meter is protected to 250 volts.
INTRODUCTION: Includes new generation, 12-function, auto-ranging
automotive diagnostic multimeter. Digital display gives accurate indication of
component outputs. Large, easy to read high contrast display with bright,
white backlight. Workshop-tough, durable bi-composite case with integral
stand and auto power shut-off. High speed processing circuitry reads
standard automotive parameters including duty cycle and pulse width making
this tool ideal for testing fuel injection systems. Features auto-ranging, and
data hold functions with overload protection on all ranges. Includes relative
functions including Min/Max and Peak Hold. Supplied with Inductive Coupler,
test probes and thermocouple in carry case.
SPECIFICATION...............................................Model No: 770J, 770K
Diode Check...........................Yes
Tach (RPM)...2-10cyl, 4-Stroke 60-9000 (x1)rpm, 600-12000 (x10)rpm
Auto Back-Light.....................Yes
Dwell:......................................................................................4/5/6/8cyl
Display Hold:..........................Yes
AC Voltage:...............................................600mV, 6V, 60V, 600V, 750V
Auto Ranging:........................Yes
DC Voltage:............................................600mV, 6V, 60V, 600V, 1000V
Inductive Coupler:..................Yes
AC Current:.............................................60mA, 600mA, 6A, 20A, 600A
Digits Height:......................24mm
DC Current:.............................................60mA, 600mA, 6A, 20A, 600A
Auto Power Off.......................Yes
Capacitance:..........10nF, 100nF, 1000nF , 10μF, 100μF, 10mF, 60mF
NCV detection.......................Yes
Frequency:................................................................0.001Hz-9.99MHz
Low Battery Indicator:.............Yes
Duty Cycle:.............................................................................1.0-99.0%
Batteries (supplied):.......9V (PP9)
Pulse Width:............................................................................0.1-10ms
Hi-Impact Case:......................Yes
Resistance:..........................600Ω, 6kΩ, 60kΩ, 600kΩ, 6MΩ, 60MΩ
Size (LxWxD):.......195x88x40mm
Continuity:....................................<50Ω Continuity Buzzer 2kHz
Weight(Include9V Battery):..350g
Temperature:.....................................-20 to +1000°C, -4 to +1832°F

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3. MAIN METER FEATURES
4. PUSH BUTTON FUNCTIONS
4.1 Manual Range & Stroke
4/2(DIS), DUTY%, ms, CYL
Button（Fig 3）
Press to this button to select:
STROKE 4, 2 DIS, DUTY%,
ms-PULSE, CYL range &
V/A/R/CAP/Hz manual
Range.
Fig.3

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Manual Ranging（Fig 3）
The meter turns on in the auto-ranging mode. Press the Range
button to go to manual ranging. The display icon " " will appear.
Each press of the range button will step to the next range as
indicated by the units and decimal point location. Press and hold
the Range button for two seconds to return to auto-ranging.
4.2 Mode Button（Fig
4）
Press the mode push
button to select the
following functions:
DC/AC Voltage & Current,
Ohm/Diode/Continuity/CA
P, ℃/℉ TEMP.
4.3 Data Hold（Fig 5a）
The Data Hold function
allows the meter to
"freeze" a measurement for later reference.
4.3.1 Press the HOLD button to “freeze” the reading on the display.
The “DH” symbol will appear in the display.
4.3.2 Press the HOLD button again to return to normal operation.
4.4 Peak
Hold (fig.
5b)
The Peak
Hold function
captures the
peak AC
voltage or
current. The
meter can capture negative or positive peaks as fast as 1.28
millisecond in duration.
4.4.1 Turn the function switch to the ACA or ACV position.
4.4.2 Press the PEAK button, Peak MAX will display.
Fig.5a
Fig.5b
Fig.4

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5. METER FUNCTIONS
4.4.3 The display will update each time a higher positive peak
occurs.
4.4.4 Press the PEAK button again, Peak MIN will display. The
display will now update and indicate the lowest negative peak.
4.4.5 To return to normal operation, press and hold the PEAK
button until the Peak MAX or PEAK MIN indicator switches off.
4.5 MAX/MIN button (fig. 6a)
4.5.1 Press the MAX/MIN button to activate the MAX/MIN
recording mode. The display icon "MAX" will appear. Press the
MAX/MIN button again, The display icon "MIN" will appear. The
meter will go to manual ranging & display and hold the maximum
or minimum reading and will update only when a new “max or min”
occurs.
4.5.2. Press the MAX/MIN key again and a blinking “MAX MIN”
will appear. The meter will display the MAX-MIN reading,
To exit MAX/MIN mode press and hold the MAX/MIN key for 2
seconds.
4.6 NCV button (fig. 6b)
4.6.1 Press and hold the “NCV” button, the meter enters Non
Contact AC Voltage (NCV) detection, the NCV green LED light will
light up, free it to exit.
4.6.2 Free the “NCV” button to exit NCV detection.
5.1 DC or AC Voltage (DCV or ACV)
5.1.1 Select the Voltage “V” range with the rotary switch.
Fig.6a Fig.6b

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5.1.2 Press the “SELECT” button to choose DC or AC voltage measurement.
5.1.3 The meter will automatically select the best voltage range.
5.1.4 Insert Black lead in COM terminal.
5.1.5 Insert Red lead in VΩHz terminal.
5.1.6 Touch the Black probe to ground or to the negative (-) circuit.
5.1.7 Touch the Red probe to the circuit coming from the power source.
IMPORTANT: Voltage must be measured in parallel (Red probe
measuring circuit from power source).
WARNING: When measuring voltage, be sure the Red test lead
is in the terminal marked “V”. If the test lead is in an Amp (A) or
Milliampere (mA) terminal, you may be injured or the meter
damaged.
5.2 Resistance (Ω)
IMPORTANT: If you are testing an application that has capacitors in the
circuit, be sure to turn the power OFF on the test circuit and discharge all
capacitors. Accurate measurement is not possible if external or residual
voltage is present.
5.2.1 Select the “ ” range with the rotary switch.
5.2.2 Insert Black lead in COM terminal.
5.2.3 Insert Red lead in VΩHz terminal.
5.2.4 Touch the test lead probes across the resistor to be tested.
5.3 Diode Check ( )
IMPORTANT: Turn the power OFF to the test circuit.
5.3.1 Select the " " function with the rotary switch, press the
“SELECT” button to choose Diode measurement.
5.3.2 Insert Black lead in COM terminal.
5.3.3 Insert Red lead in VΩHz terminal
5.3.4 Touch the Black test probe to the negative (-) side of the diode.
5.3.5 Touch the Red test probe to the positive (+) side of the diode.
5.3.6 Reverse the probes: Black to the positive (+) side and Red to the
negative (-) side.
Note: A "good" diode will read low in one direction and high in the other when the
probes are reversed (or vice versa). A defective diode will have the same reading in
both directions or read between 1.0 to 3.0 V. In both directions.

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5.4 Audible Continuity ( )
IMPORTANT: Turn the power OFF on the test circuit
5.4.1 Select " " function with the rotary switch, press the
“SELECT” button to choose Audible continuity measurement.
5.4.2 Insert Black lead in COM terminal.
5.4.3 Insert Red lead in VΩHz terminal.
5.4.4 Connect one test probe to each end of the circuit to be
tested.
5.4.5 If the circuit is complete, the meter will beep continuously.
5.4.6 If the circuit is open, there is no beep and the
display shows OL (over limit).
DIODE (- to +) Reverse probes (+ to -)
GOOD 0.4 to 0.9V Over Limit (OL)
Over Limit (OL) 0.4 to 0.9V
BAD
Over Limit (OL) 1.0 to 3.0V
1.0 to 3.0V Over Limit (OL)
0.4 to 0.9V 0.4 to 0.9V
Over Limit (OL) Over Limit (OL)
0.000V 0.000V
5.5 Capacitance ( CAP )
IMPORTANT: Turn the power OFF to the test circuit
5.5.1 Select the “ " function with the rotary switch, press the
“SELECT” button to choose Capacitance measurement.
5.5.2 Insert Black lead in COM terminal.
5.5.3 Insert Red lead in VΩHz terminal.
CAUTION: When checking in-circuit capacitance, be sure that the circuit has all
power removed and all capacitors are fully discharged.
5.5.4 Touch the test lead probes across the capacitance circuit to be tested.
5.5.5 Read the measured value from the LCD Display.