Durite 0-798-50 User manual

WARNING
Be sure to read the warnings and follow the instructions in this
leaflet. Incorrect use may put the user in danger.
he following legends apply to this leaflet and multimeter:
Danger High voltage
Ground/Earth
Warning! Refer to the instruction leaflet
Direct Current (DC)
Alternating current (AC)
Fuse with correct amp rating
Double insulated
10amps Maximum!
o avoid electrical shock, remove test leads before opening the
case.
Do not use abrasives or solvents to clean the case!
Gordon Equipments Limited, England 0-798-50 LEAF1
Digital hand held multi-meter
Part 0-798-50
Introduction
This meter is designed to measure DC and AC voltage, DC and AC current, Resistance, Frequency and Duty Cycle,
Temperature, Capacitance, Diode and Audible Continuity test. t features a separate On/Off switch, large LCD display
with backlight, multi-function switch and 5 buttons select the various functions and ranges. Red and black leads with
test probes and push on crocodile clips are provided for electrical measurements and a contact temperature probe
are included. The meter switches off after approximately 30 minutes if no section has been made, this function can
be overridden by pressing the blue button when turning the meter on.
WARNING
Be sure to read the warnings and follow the instructions in this manual. ncorrect use may put the user in danger.
Safety rules and warnings!
1. Do not operate unit with rear cover removed, high voltage circuitry may be exposed!
2. Before use ensure that battery and leads are serviceable and connect leads to appropriate sockets.
3. Select correct function and manual range if required.
4. Do not attempt to measure values in excess of the maximum.
5. Do not switch between functions when connected to circuits being tested.
6. Use only new fuses of correct rating in the event of a fuse failure.
7. The battery must be renewed when the battery symbol is displayed otherwise accuracy will be affected.
8. Switch off unit when not in use to reduce battery drain.
9. Do not use this multi-meter in wet conditions.
10. Observe safety warnings in these instructions as danger to user could be present when testing some circuits
or components.
General features
Maximum display: ‘±3999’
DC Voltage Range: 400mV to 1000V
DC Current Ranges: 4A to 10A, 40mA to 400mA, 400µA to 4000µA
AC Voltage Range: 4V to 750V
AC Current Ranges: 4A to 10A, 40mA to 400mA, 400µA to 4000µA
Resistance Range: 400Ωto 40MΩ
Capacitance Range: 40nF to 100µF
Temperature Range: -40˚C to 1000˚C
Frequency Range: 10Hz to 10Mhz
Auto Polarity ndicator
Over range Display: ‘OL’
Diode Forward Voltage Drop and Continuity Buzzer
Sampling Time around 0.3 seconds
Energy: 9v Battery (NEDA 1604, PP3, 6F22 or equivalent)
Low Battery Voltage ndication
Auto Off: Approximately 30minutes
Overload Protection (internal fuses)
Operating Temperature: 0°C to 40°C
Storing Temperature: -10°C to 50°C
Operating Relative Humidity: <75% @ 0°C to 30°C, <50% @ 31°C to 40°C
Dimension: 177 x 85 x 40mm (L x W x H)
Weight: Approximately 300 grams
Fuses: µA and mA range 0.5A 250V, 5 x 20mm fast acting, 10A range 10A 250V, 5 x 20mm fast acting
Gordon Equipments Limited, England

Measuring procedure
Switch on the unit, replace battery if ‘‘symbol appears. The sign near the test lead socket is a warning not to
input values of Voltage or Current higher than the maximum. Ensure correct function is selected before connecting
the unit to a circuit or component being tested. Connect the red test lead to the correct input socket and the black
lead to the ‘COM’ socket. The meter automatically defaults to auto ranging and displays ‘AU O’, to select a manual
range press the ‘RANGE’ button repeatedly until the desired range is selected, to reselect auto ranging press and hold
the ‘RANGE’ button. When using manual range selection and the magnitude of the voltage or current is unknown,
always start with the highest range and reduce until a satisfactory reading is obtained. Do not change ranges whilst
connected to a circuit always disconnect first. ‘OL’ is displayed when a range is overloaded. The ‘HOLD’ and ‘REL’
function operates in all ranges (except frequency/duty cycle in ‘REL’), press ‘HOLD’ to hold the present reading, press
again to cancel, press ‘REL’ to subtract a stored value from the present value to display the relative value (note,
pressing ‘REL’ turns the auto ranging off). To operate the backlight press and hold the ‘HOLD’ button for 2 seconds,
to turn off press and hold again.
Voltage measurement DC/AC
Connect the black test lead to the ‘COM’ socket and the red test lead to the ‘HzVΩ’socket. Set the rotary switch to ‘V’
and press the blue button to select DC or AC, manual ranging can be selected by pressing the ‘RANGE’ button.
Connect the test probes across the circuit to be measured. The measured value and polarity is displayed with
reference to the red test probe. A EN ION! Do not exceed the maximum input limit - Maximum 750 VDC and
1000VAC, otherwise it will damage the unit. Frequency response 40-400Hz, displays effective value of sine wave
(mean value).
Current measurement DC
Connect the black test lead to the ‘COM’ socket. f measuring below 400mA, then connect the red test lead to the
‘µAmA˚C’ socket, otherwise connect to the ‘10A’ socket if measuring between 400mA to 10A. Set the rotary switch to
the ‘µA’ (400µA, 4000µA), ‘mA’ (40mA, 400mA) or ‘A’ (4A, 10A) range and press the blue button to select DC or AC,
manual ranging can be selected by pressing the ‘RANGE’ button. Connect the test probes in series with the load to
be measured, the measured value and polarity is displayed with reference to the red test probe. A EN ION! Never
attempt to measure current in a circuit where the open-circuit voltage between the circuit and ground is greater than
250V. f the magnitude of the current is unknown, always start with the highest range and reduce until a satisfactory
reading is obtained. Two fuses protect the current ranges and should only be replaced with a fuse of the correct
rating. Current measurement in the 10A range must not last more than 10 seconds in any 15 minute period.
Resistance measurement
Connect the black test lead to ‘COM’ socket and the red test lead to ‘HzVΩ’socket. Set the rotary function switch to
‘Ω ’and press the blue button to select Ω; the default is Ω.Manual ranging can be selected by pressing the
‘RANGE’ button. Connect the test probes across the device being measured. f ‘OL’ is displayed it means there is an
open circuit or the resistance is greater than 40MΩ. A EN ION! Make sure there is no voltage present and
capacitors are discharged before attempting to measure resistance.
Continuity check and Diode test
Connect the black test lead to ‘COM’ socket and the red test lead to ‘HzVΩ’socket. Set the rotary function switch to
‘Ω ’and press the blue button to select ‘ ‘ (continuity) or ‘ ‘ (diode); the default is Ω.Connect the test
probes across the circuit to be measured, if the resistance between the probes is less than 70Ω, the buzzer is
activated. When testing a diode, with the red lead connected to the anode, the ‘forward voltage’ of the diode is
displayed, with the black lead connected to the anode ‘OL’ is displayed. A EN ION! Make sure there is no voltage
present and capacitors are discharged before attempting to measure resistance.
Capacitance measurement
Connect the black test lead to ‘COM’ socket and the red test lead to ‘HzVΩ’socket. Set the rotary function switch to
‘Ω ’and press the blue button to select ‘nF ‘; the default is Ω.Connect the test probes across the capacitor to
be measured, if the capacitor is polarity conscience ensure the red lead is connected to the anode and black lead to
the cathode. A EN ION! Make sure there is no voltage present and capacitors are discharged before attempting to
measure.
Frequency and Duty Cycle measurement
Connect the black test lead to ‘COM’ socket and the red test lead to ‘HzVΩ’socket. Set the rotary function switch to
the ‘Hz’ and press the ‘Hz%’ button to select ‘Hz’ (frequency) or ‘%’ (duty cycle); the default is ‘Hz’. Connect the test
probes across the device to be measured. To measure frequency or duty cycle where the amplitude of the signal is
<30Vrms set the rotary switch to ‘V’ then press the ‘Hz’ button to select Hz or % as required.
emperature measurement
Connect the temperature probe black test lead to ‘COM’ socket and the red test lead to ‘µAmA˚C’ socket. Set the rotary
function switch to the ‘˚C’. The tip of the probe must be held firmly in contact with the surface to be measured, wait
until the reading stabilises. When no leads are connected the ambient temperature is shown. A EN ION! The point
contact temperature probe can only be used to measure temperatures up to 250˚C.
Always switch the multi-meter off when not in use to conserve the battery.
Mode Range Measuring Conditions Remarks
Diode Open circuit voltage about 1.48V. Displays diode forward voltage drop.
Buzzer Open circuit voltage 0.45V. Buzzer sounds when testing object
resistance <70Ω, display shows
approximate value.
Frequency Hz nput sensitivity <1MHz: <300mV Maximum input amplitude 30V rms
>1MHz: <600mV
Mode Range Accuracy Resolution /P mpedance Circuit overload protection
400mV ±(0.8%+3) 0.1mV
4V 1mV
Voltage DC 40V ±(0.8%+1) 10mV 10MΩ1000VDC
400V 100mV 750VAC rms
1000V ±(1%+3) 1V
4V 1mV
Voltage AC 40V ±(1%+5) 10mV 1000VDC
400V 100mV 10MΩ750VAC rms
750V ±(1.2%+5) 1V
400µA ±(1%+2) 0.1µA
Current DC 4000µA 1µA 0.5A 250V fast acting
40mA ±(1.2%+3) 0.01mA fuse, 5x20mm
400mA 0.1mA
4A ±(1.5%+5) 0.001A 10A 250V fast acting
10A 0.01A fuse, 5x20mm
400µA ±(1.5%+5) 0.1µA
Current AC 4000µA 1µA 0.5A 250V fast acting
40mA ±(2%+5) 0.01mA fuse, 5x20mm
400mA 0.1mA
4A ±(2.5%+5) 0.001A 10A 250V fast acting
10A 0.01A fuse, 5x20mm
Continuity (400Ω) <100Ω0.1Ω
Diode Diode N/A 1mV
Resistance 400Ω±(1.2%+2) 0.1Ω1000Vp
4kΩ1Ω
40kΩ±(1%+2) 10Ω
400kΩ100Ω
4MΩ±(1.2%+2) 1kΩ
40MΩ±(1.5%+2) 10kΩ
40nF ±(3%+10) 10pF
Capacitance 400nF 100pF
4µF ±(3%+5) 1nF 1000Vp
40µF 10nF
100µF ±(4%+5) 100nF
Frequency 10Hz-40MHz ±(0.1%+3) N/A 1000Vp
Duty Cycle 0.1%-99.9% N/A 0.01%
Temperature -40˚C-1000˚C -40-0˚C ±(3%+4)
0-400˚C ±(1%+3) 1˚C 0.5A 250V fast acting
400-1000˚C fuse, 5x20mm
±(2%+10)
Specifications