Oxford PRECISION OXD-516-6487F User manual

AUTO RANGING
DIGITAL MULTIMETER
OPERATOR’S MANUAL
ORDER CODE: OXD-516-6487F
CZ HU PL SK TH cromwell.co.uk
• Auto Ranging
• Data hold function
• Relative zero mode
• Auto power off and
low battery indication
• Backlight
• Tilt Stand
• CAT III 1000V
• CAT IV 600V
• Test Leads
• Carrying Case

2
SAFETY INFORMATION
The following safety information must be observed to insure maximum personal safety during
the operation of this Multimeter:
• Do not use if the multimeter or test leads look damaged, or if you suspect that the
Multimeter is not operating properly.
• Never ground yourself when taking electrical measurements. Do not touch exposed metal
pipes, outlets, xtures, etc., which might be at ground potential. Keep your body isolated from
ground by using dry clothing, rubber shoes, rubber mats, or any approved insulating material.
• Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit.
Small amounts of current can be dangerous.
• Use caution when working above 60V DC or 30V AC rms. Such voltages pose a shock hazard.
• When using the probes, keep your ngers behind the nger guards on the probes.
• Measuring voltage which exceeds the limits of the Multimeter may damage it and expose
the operator to a shock hazard. Always observe the Multimeter voltage limits as stated
on the front of the unit.
• Never apply voltage or current to the Multimeter that exceeds the specied maximum.
SYMBOLS USED
This symbol adjacent to another symbol, terminal or operating
device indicates that the operator must refer to an explanation
in the Operator’s manual to avoid personal injury or damage to
the Multimeter.
This symbol advises the user that the terminal(s) so marked
must not be connected to a circuit point at which the voltage
with respect to earth ground exceeds (in this case) 1000V AC
or VDC.
This symbol adjacent to one or more terminals identies them
as being associated with ranges that may, in normal use, be
subjected to particularly hazardous voltages. For maximum
safety, the Multimeter and its test leads should not be handled
when these terminals are energised
Never apply voltage or current to the meter that exceeds the
specified maximum:
SAFETY SYMBOLS
This symbol adjacent to another symbol, terminal or
operating device indicates that the operator must
refer to an explanation in the Operating Instructions
to avoid personal injury or damage to the meter.
This WARNING symbol indicates a potentially
hazardous situation which,if not avoided, could
result in death or serious injury.
This CAUTION symbol indicates a potentially
hazardous situation which,if not avoided, may
result damage to the product.
This symbol advises the user that the terminal(s) so
marked must not be connected to a circuit point at
which the voltage with respect to earth ground
exceeds (in this case)1000 VAC or VDC.
This symbol adjacent to one or more terminals
identifies them as being associated with ranges that
may, in normal use, be subjected to particularly
WARNING
CAUTION
MAX
Never apply voltage or current to the meter that exceeds the
specified maximum:
SAFETY SYMBOLS
This symbol adjacent to another symbol, terminal or
operating device indicates that the operator must
refer to an explanation in the Operating Instructions
to avoid personal injury or damage to the meter.
This WARNING symbol indicates a potentially
hazardous situation which,if not avoided, could
result in death or serious injury.
This CAUTION symbol indicates a potentially
hazardous situation which,if not avoided, may
result damage to the product.
This symbol advises the user that the terminal(s) so
marked must not be connected to a circuit point at
which the voltage with respect to earth ground
exceeds (in this case)1000 VAC or VDC.
This symbol adjacent to one or more terminals
identifies them as being associated with ranges that
may, in normal use, be subjected to particularly
WARNING
CAUTION
MAX
Never apply voltage or current to the meter that exceeds the
specified maximum:
SAFETY SYMBOLS
This symbol adjacent to another symbol, terminal or
operating device indicates that the operator must
refer to an explanation in the Operating Instructions
to avoid personal injury or damage to the meter.
This WARNING symbol indicates a potentially
hazardous situation which,if not avoided, could
result in death or serious injury.
This CAUTION symbol indicates a potentially
hazardous situation which,if not avoided, may
result damage to the product.
This symbol advises the user that the terminal(s) so
marked must not be connected to a circuit point at
which the voltage with respect to earth ground
exceeds (in this case)1000 VAC or VDC.
This symbol adjacent to one or more terminals
identifies them as being associated with ranges that
may, in normal use, be subjected to particularly
WARNING
CAUTION
MAX

3
36
9
10
8
4
10A
A
mA
V
Ω
¡ ã¡ ã
μ
11
12
7
REL
1
2
AC
Hz%
DC
AUTO
Hz%
kM
5
hazardous voltages. For maximum safety, the meter
and its test leads should not be handled when these
terminals are energized.
CONTROLS AND JACKS
1. Large 4000 count Liquid Crystal Display
with symbolic signs.
2. Range pushbutton.
PRODUCT FEATURES
1. Large 4000 count Liquid Crystal Display with symbolic signs
2. Range push button
3. Frequency/ % Duty button
4. Mode push button
5. Data Hold push button
6. Relative push button
7. Backlight push button
8. Function switch
9. 10A (positive) input jack
10. µA/mA input jack
11. Positive input jack for DC/AC Voltage, Hz/%duty cycle, Ohms, Diode, Continuity,
Capacitance measurements
12. COM (negative) input jack

4
SYMBOLS AND ANNUNCIATORS
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
Continuity
BAT Low Battery
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
Diode
DATA HOLD Data Hold
AUTO Auto Ranging
AC Alternating Current or Voltage
DC Direct Current or Voltage
SPECIFICATIONS
The instrument
complies with: EN61010-1
Insulation: Class2, Double insulation
Over voltage category: CAT III 1000V, CAT IV 600V
Display: 4000 counts LCD display with function indication
Polarity: Automatic, (-) negative polarity indication
Over range: “OL” mark indication
Low battery indication: The “BAT” is displayed when the battery voltage drops
below the operating level
Measurement rate: 2 times per second, nominal
Auto power off: Meter automatically shuts down after approx.
15 minutes of inactivity
Operating environment: 0°C to 50°C (32 °F to 122 °F) at
<70 % relative humidity
Storage temperature: -20 °C to 60 °C (-4 °F to 140 °F) at
< 80 % relative humidity
For inside use, max height: 2000m
Pollution degree: 2
Power: One 9V battery, NEDA 1604, IEC 6F22
Dimensions: 182 (H) x 82 (W) x55 (D) mm
Weight: Approx.: 375g
Accuracy is given at 18 °C to 28 °C (65 °F to 83 °F), less than 70 % RH
DC Voltage (Auto ranging)
Input Impedance: 7.8MΩ
Maximum Input: 1000V DC or 1000V AC rms
Weight: Approx.: 375g.
Accuracy is given at 18 oC to 28 oC (65
o
F to 83
o
F), less than
70 % RH
DC Voltage (Auto-ranging)
Range
Resolution
Accuracy
400.0mV
0.1mV
+0.5% of rdg +2 dgts
4.000V
1mV
+1.2% of rdg + 2 dgts
40.00V
10mV
400.0V
100mV
1000V
1V
+1.5% of rdg +2 dgts
Input Impedance: 7.8MΩ.
Maximum Input:1000V dc or1000V ac rms.
AC Voltage (Auto-ranging except 400mV)
Range
Resoluti
on
Accuracy
400.0mV
0.1mV
+1.5%of rdg +70 dgts
4.000V
1mV
+1.2% of rdg +3 dgts
40.00V
10mV
+1.5% of rdg +3 dgts
400.0V
100mV
1000V
1V
+2.0% of rdg + 4 dgts
Input Impedance: 7.8MΩ.
AC Response: 50 Hz to 400 Hz
Maximum Input: 1000V dc or 1000V ac rms.

5
AC Voltage (Auto ranging except 400mV)
Input Impedance: 7.8MΩ
AC Response: 50 Hz to 400 Hz
Maximum Input: 1000V DC or 1000V AC rms
DC Current (Auto ranging for µA and mA)
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse
Maximum Input: 400mA DC or 400mA AC rms on µA / mA ranges,
10A DC or AC rms on 10A range
AC Current (Auto ranging for µA and mA)
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse
AC Response: 50 Hz to 400 Hz
Maximum Input: 400mA DC or 400mA AC rms on µA / mA ranges,
10A DC or AC rms on 10A range
Weight: Approx.: 375g.
Accuracy is given at 18 oC to 28 oC (65
o
F to 83
o
F), less than
70 % RH
DC Voltage (Auto-ranging)
Range
Resolution
Accuracy
400.0mV
0.1mV
+0.5% of rdg +2 dgts
4.000V
1mV
+1.2% of rdg + 2 dgts
40.00V
10mV
400.0V
100mV
1000V
1V
+1.5% of rdg +2 dgts
Input Impedance: 7.8MΩ.
Maximum Input:1000V dc or1000V ac rms.
AC Voltage (Auto-ranging except 400mV)
Range
Resoluti
on
Accuracy
400.0mV
0.1mV
+1.5%of rdg +70 dgts
4.000V
1mV
+1.2% of rdg +3 dgts
40.00V
10mV
+1.5% of rdg +3 dgts
400.0V
100mV
1000V
1V
+2.0% of rdg + 4 dgts
Input Impedance: 7.8MΩ.
AC Response: 50 Hz to 400 Hz
Maximum Input: 1000V dc or 1000V ac rms.
DC Current (Auto-ranging for uA and mA)
Range
Resolution
Accuracy
400.0uA
0.1µA
+1.0% of rdg +3 dgts
4000uA
1µA
+1.5% of rdg + 3 dgts
40.00mA
10µA
400.0mA
100µA
10A
10mA
+2.5% of rdg +5 dgts
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse.
Maximum Input: 400mA dc or 400mA ac rms on uA / mA ranges,
10A dc or ac rms on 10A range.
AC Current (Auto-ranging for uA and mA)
Range
Resolution
Accuracy
400.0uA
0.1µA
+1.5% of rdg +5 dgts
4000uA
1µA
+1.8% of rdg + 5 dgts
40.00mA
10µA
400.0mA
100µA
10A
10mA
+3.0% of rdg +7 dgts
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse.
AC Response: 50 Hz to 400 Hz
Maximum Input: 400mA dc or 400mA ac rms on uA / mA ranges,
10A dc or ac rms on 10A range.
DC Current (Auto-ranging for uA and mA)
Range
Resolution
Accuracy
400.0uA
0.1µA
+1.0% of rdg +3 dgts
4000uA
1µA
+1.5% of rdg + 3 dgts
40.00mA
10µA
400.0mA
100µA
10A
10mA
+2.5% of rdg +5 dgts
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse.
Maximum Input: 400mA dc or 400mA ac rms on uA / mA ranges,
10A dc or ac rms on 10A range.
AC Current (Auto-ranging for uA and mA)
Range
Resolution
Accuracy
400.0uA
0.1µA
+1.5% of rdg +5 dgts
4000uA
1µA
+1.8% of rdg + 5 dgts
40.00mA
10µA
400.0mA
100µA
10A
10mA
+3.0% of rdg +7 dgts
Overload Protection: 0.5A / 1000V and 10A / 1000V Fuse.
AC Response: 50 Hz to 400 Hz
Maximum Input: 400mA dc or 400mA ac rms on uA / mA ranges,
10A dc or ac rms on 10A range.

6
Resistance (Auto ranging)
Input Protection: 600V DC or 600V AC rms
Capacitance (Auto ranging)
Input Protection: 600V DC or 600V AC rms
Frequency (Auto ranging)
Sensitivity: <0.5V RMS while ≤1MHz
Sensitivity: >3V RMS while >1MHz
Overload protection: 600V DC or AC rms
Duty Cycle
Pulse width: >100us, <100ms
Frequency width: 5Hz – 150kHz
Sensitivity: <0.5V RMS
Overload protection: 600V DC or AC rms
Resistance (Auto-ranging)
Range
Resolution
Accuracy
400.0Ω
0.1Ω
+1.2% of rdg +4 dgts
4.000kΩ
1Ω
+1.0% of rdg +2 dgts
40.00kΩ
10Ω
+1.2% of rdg +2 dgts
400.0kΩ
100Ω
4.000MΩ
1kΩ
40.00MΩ
10kΩ
+2.0% of rdg +3 dgts
Input Protection: 600V dc or 600V ac rms.
Capacitance (Auto-ranging)
Range
Resolution
Accuracy
4.000nF
1pF
+5.0% of rdg+20 dgts
40.00nF
10pF
+5.0% of rdg +7 dgts
400.0nF
0.1nF
+3.0% of rdg + 5 dgts
4.000uF
1nF
40.00uF
10nF
100.0uF
0.1µF
+5.0% of rdg +5 dgts
Input Protection: 600V dc or 600V ac rms.
Frequency (Auto-ranging)
Range
Resolution
Accuracy
9.999Hz
0.001Hz
+1.5% of rdg +5 dgts
99.99Hz
0.01Hz
999.9Hz
0.1Hz
+1.2% of rdg + 3 dgts
9.999kHz
1Hz
99.99kHz
10Hz
999.9kHz
100Hz
9.999MHz
1kHz
+1.5% of rdg +4 dgts
Resistance (Auto-ranging)
Range
Resolution
Accuracy
400.0Ω
0.1Ω
+1.2% of rdg +4 dgts
4.000kΩ
1Ω
+1.0% of rdg +2 dgts
40.00kΩ
10Ω
+1.2% of rdg +2 dgts
400.0kΩ
100Ω
4.000MΩ
1kΩ
40.00MΩ
10kΩ
+2.0% of rdg +3 dgts
Input Protection: 600V dc or 600V ac rms.
Capacitance (Auto-ranging)
Range
Resolution
Accuracy
4.000nF
1pF
+5.0% of rdg+20 dgts
40.00nF
10pF
+5.0% of rdg +7 dgts
400.0nF
0.1nF
+3.0% of rdg + 5 dgts
4.000uF
1nF
40.00uF
10nF
100.0uF
0.1
µ
F
+5.0% of rdg +5 dgts
Input Protection: 600V dc or 600V ac rms.
Frequency (Auto-ranging)
Range
Resolution
Accuracy
9.999Hz
0.001Hz
+1.5% of rdg +5 dgts
99.99Hz
0.01Hz
999.9Hz
0.1Hz
+1.2% of rdg + 3 dgts
9.999kHz
1Hz
99.99kHz
10Hz
999.9kHz
100Hz
9.999MHz
1kHz
+1.5% of rdg +4 dgts
Resistance (Auto-ranging)
Range
Resolution
Accuracy
400.0Ω
0.1Ω
+1.2% of rdg +4 dgts
4.000kΩ
1Ω
+1.0% of rdg +2 dgts
40.00kΩ
10Ω
+1.2% of rdg +2 dgts
400.0kΩ
100Ω
4.000MΩ
1kΩ
40.00MΩ
10kΩ
+2.0% of rdg +3 dgts
Input Protection: 600V dc or 600V ac rms.
Capacitance (Auto-ranging)
Range
Resolution
Accuracy
4.000nF
1pF
+5.0% of rdg+20 dgts
40.00nF
10pF
+5.0% of rdg +7 dgts
400.0nF
0.1nF
+3.0% of rdg + 5 dgts
4.000uF
1nF
40.00uF
10nF
100.0uF
0.1µF
+5.0% of rdg +5 dgts
Input Protection: 600V dc or 600V ac rms.
Frequency (Auto-ranging)
Range
Resolution
Accuracy
9.999Hz
0.001Hz
+1.5% of rdg +5 dgts
99.99Hz
0.01Hz
999.9Hz
0.1Hz
+1.2% of rdg + 3 dgts
9.999kHz
1Hz
99.99kHz
10Hz
999.9kHz
100Hz
9.999MHz
1kHz
+1.5% of rdg +4 dgts
Sensitivity: <0.5V RMS while ≤1MHz ;
Sensitivity: >3V RMS while >1MHz ;
Overload protection: 600V dc or ac rms.
Duty Cycle
Range
Resolution
Accuracy
0.1%~99.9%
0.1%
+1.2% of rdg +2 dgts
Pulse width: >100us, <100ms;
Frequency width: 5Hz –150kHz
Sensitivity: <0.5V RMS
Overload protection: 600V dc or ac rms.
Diode Test
Test current
Resolution
Accuracy
0.3mA
typical
1 mV
+10% of rdg +5 dgts
Open circuit voltage: 1.5V dc typical
Overload protection: 600V dc or ac rms.
Audible continuity
Audible threshold: Less than150Ω; Test current: <0.3mA
Overload protection: 600V dc or ac rms.

7
Diode Test
Open circuit voltage: 1.5V DC typical
Overload protection: 600V DC or AC rms
Audible continuity
Audible threshold: Less than 150ΩTest current: <0.3mA
Overload protection: 600V AC or DC rms
OPERATION
WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous
and should be measured with great care.
1. ALWAYS turn the function switch to the OFF position when the Multimeter is not in use.
This Multimeter has Auto OFF that automatically shuts the meter OFF if 15 minutes elapse
between uses.
2. If “OL” appears in the display during a measurement, the value exceeds the range you
have selected. Change to a higher range.
NOTE: On some low AC and DC voltage ranges, with the test leads not connected to a device, the
display may show a random, changing reading. This is normal and is caused by the high-input
sensitivity. The reading will stabilize and give a proper measurement when connected to a circuit.
Mode Button
To select Diode/Continuity or DC/AC current
Range Button
When the meter is rst turned on, it automatically goes into Auto Ranging. This automatically
selects the best range for the measurements being made and is generally the best mode for
most measurements. For measurement situations requiring that a range be manually selected,
perform the following:
1. Press the RANGE button. The “AUTO” display indicator will turn off.
2. Press the RANGE button to step through the available ranges until you select the range
you want.
3. Press and hold the RANGE button for 2 seconds to exit the Manual Ranging mode and return
to Auto Ranging. (If backlight is turned on, press BACKLIGHT button to turn off).
Data Hold Button
The Data Hold function allows the Multimeter to “freeze” a measurement for later reference.
1. Press the DATA HOLD button to “freeze” the reading on the indicator. The indicator
“HOLD” will be appear in the display.
2. Press the DATA HOLD button to return to normal operation.
Sensitivity: <0.5V RMS while ≤1MHz ;
Sensitivity: >3V RMS while >1MHz ;
Overload protection: 600V dc or ac rms.
Duty Cycle
Range
Resolution
Accuracy
0.1%~99.9%
0.1%
+1.2% of rdg +2 dgts
Pulse width: >100us, <100ms;
Frequency width: 5Hz –150kHz
Sensitivity: <0.5V RMS
Overload protection: 600V dc or ac rms.
Diode Test
Test current
Resolution
Accuracy
0.3mA
typical
1 mV
+10% of rdg +5 dgts
Open circuit voltage: 1.5V dc typical
Overload protection: 600V dc or ac rms.
Audible continuity
Audible threshold: Less than150Ω; Test current: <0.3mA
Overload protection: 600V dc or ac rms.

8
Relative Button
The relative measurement feature allows you to make measurements relative to a stored reference
value. A reference voltage, current, etc. can be stored and measurements made in comparison to that
value. The displayed value is the difference between the reference value and the measured value.
1. Perform any measurement as described in the operating instructions.
2. Press the RELATIVE button to store the reading in the display and the “REL” indicator will
appear on the display.
3. The display will now indicate the difference between the stored value and the measured value.
4. Press the RELATIVE button to return to normal operation.
Backlight Button
1. Press the BACKLIGHT button for 2 seconds to switch the light ON.
2. Press BACKLIGHT button again to exit the light mode.
Hz/% Duty Button
Press Hz/Duty Button to choose Frequency or Duty Cycle in the range of Frequency; Press
Hz/%Duty Button to measure Frequency or Duty Cycle while measures voltage or Current, the
Voltage/Current requirement and range of Frequency (see the following table), press Hz/%Duty
Button to return to measurement of Voltage or Current.
Note: The above data is only for reference.
DC VOLTAGE MEASUREMENTS
CAUTION: Do not measure DC voltages if a motor on the circuit is being switched ON or OFF.
Large voltage surges may occur that can damage the Multimeter.
1. Set the function switch to the V DC position (“mV” will appear in the display).
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead
banana plug into the positive (V) jack.
3. Touch the test probe tips to the circuit under test. Be sure to observe the correct polarity (red
lead to positive, black lead to negative).
4. Read the voltage in the display. The display will indicate the proper decimal point and
value. If the polarity is reversed, the display will show (-) minus before the value.
AC VOLTAGE MEASUREMENTS
WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts
inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a
result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the probe
tips are touching the metal contacts inside the outlet before assuming that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being switched ON or OFF.
Large voltage surges may occur that can damage the Multimeter.
2. Press the RELATIVE button to store the reading in the display and the
"REL" indicator will appear on the display.
3. The display will now indicate the difference between the stored value
and the measured value.
4. Press the RELATIVE button to return to normal operation.
BACKLIGHT BUTTON
1. Press the BACKLIGHT button 2 seconds to display light ON
2. Press BACKLIGHT button again to exit the light mode.
Hz/%duty BUTTON
Press Hz/Duty Button to choose Frequency or Duty Cycle in the range of
Frequency; Press Hz/%Duty Button to measure Frequency or Duty Cycle
while measures voltage or Current, the Voltage/Current requirement and
range of Frequency see the following form, press Hz/%Duty Button to
return to measurement of Voltage or Current.
Range
( DC/AC )
Sensitivity
Frequency
width
4V
≥
1.5V rms
5Hz~10kHz
40V, 400V
≥
10V rms
5Hz~20kHz
≥
20V rms
5Hz~200kHz
1000V/1000V
≥
420V rms
50Hz~1kHz
400mA
≥
45mA rms
5Hz~5kHz
10A
≥
4A rms
5Hz~1kHz

9
1. Set the function switch to the VAC position.
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead
banana plug into the positive (V) jack.
3. Touch the test probe tips to the circuit under test.
4. Read the voltage in the display. The display will indicate the proper decimal point, value
and symbol (AC, V, etc.).
DC CURRENT MEASUREMENTS
CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the Multimeter and/or the test leads.
1. Insert the black test lead banana plug into the negative (COM) jack.
2. For current measurements up to 4000µA DC, set the function switch to the µA position
and insert the red test lead banana plug into the (µA) jack.
3. For current measurements up to 400mA DC, set the function switch to the mA range and
insert the red test lead banana plug into the (mA) jack.
4. For current measurements up to 10A DC, set the function switch to the A position and
insert the red test lead banana plug into the 10A jack.
5. Press the AC/DC button until “DC” appears in the display.
6. Remove power from the circuit under test, then open up the circuit at the point where
you wish to measure current.
7. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe
tip to the positive side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display. The display will indicate the proper decimal point, value
and symbol.
AC CURRENT MEASUREMENTS
WARNING: To avoid electric shock, do not measure AC current on any circuit whose voltage
exceeds 250V AC.
CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the Multimeter and/or the test leads.
1. Insert the black test lead banana plug into the negative (COM) jack.
2. For current measurements up to 4000µA AC, set the function switch to the µA position
and insert the red test lead banana plug into the (µA) jack.
3. For current measurements up to 400mA AC, set the function switch to the mA range and
insert the red test lead banana plug into the (mA) jack.
4. For current measurements up to 10A AC, set the function switch to the A position and
insert the red test lead banana plug into the 10A jack.
5. Press the AC/DC button until “AC” appears in the display.
6. Remove power from the circuit under test, then open up the circuit at the point where
you wish to measure current.
7. Touch the black test probe tip to the negative side of the circuit. And touch the red test
probe tip to the positive side of the circuit.
8. Apply power to the circuit. Read the current in the display. The display will indicate the
proper decimal point, value and symbol.

10
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any resistance measurements. Remove the batteries and unplug the
power leads.
1. Set the function switch to the Ωposition.
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead
banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best to disconnect one side
of the part under test so the rest of the circuit will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper decimal point,
value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on circuits or wires that have
voltage on them.
1. Set the function switch to the
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
position.
2. Insert the black lead banana plug into the negative (-) jack (COM) and the red test lead
banana plug into the positive (+) jack (Ω).
3. Press the
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
button until the
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal will sound. The
display will also show the actual resistance.
DIODE TEST
WARNING: To avoid electric shock, do not test any diode that has voltage on it.
1. Set the function switch to
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
position.
2. Press the
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
button until the
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal
symbol appears in the display.
3. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead
banana plug into the positive (+) jack (Ω).
4. Touch the test probe tips to the diode or semiconductor junction you wish to test. Note
the meter reading.
5. Reverse the probe polarity by switching probe position. Note this reading.
6. The diode or junction can be evaluated as follows:
• If one reading shows a value and the other reading shows OL, the diode is good.
• If both readings show OL, the device is open.
• If both readings are very small or 0, the device is shorted.
NOTE: The value indicated in the display during the diode check is the forward voltage.
FREQUENCY MEASUREMENT
1. Set the function switch to the Hz position.
2. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead
banana plug into the positive (+) jack (Hz%).
3. Touch the test probe tips to the circuit under test.
4. Read the frequency in the display. The digital reading will indicate the proper decimal
point, symbols (Hz, kHz) and value.
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
and the red test lead banana plug into the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM)
and the red test lead banana plug into the positive (+) jack (Ω).
3. Press the button until the symbol appears in the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 150Ω, the audible signal

11
CAPACITANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any capacitance measurements. Remove the batteries and unplug
the power leads.
1. Set the function switch to the CAP position. (“nF” and a small value will appear in the display).
2. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test
lead banana plug into the positive (+) jack (CAP).
3. Touch the test leads to the capacitor to be tested. The display will indicate the proper
decimal point, value and symbol.
REPLACING THE BATTERY
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the battery cover.
1. When the batteries become exhausted or drop below the operating voltage, the battery
symbol will appear in the left-hand corner of the LCD display. The battery should be
replaced.
2. Follow instructions for installing battery. See the Battery Installation section below.
3. Dispose of the old battery properly.
WARNING: To avoid electric shock, do not operate your Multimeter until the battery cover is in
place and fastened securely.
BATTERY INSTALLATION
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the battery cover.
1. Disconnect the test leads from the Multimeter.
2. Open the battery cover by loosening the screw using a Phillips head screwdriver.
3. Insert the battery into battery holder, observing the correct polarity.
4. Put the battery cover back in place. Secure with the two screws.
WARNING: To avoid electric shock, do not operate the Multimeter until the battery cover is in
place and fastened securely.
NOTE: If your Multimeter does not work properly, check the fuses and battery to make sure
that they are still good and that they are properly inserted.
REPLACING THE FUSES
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the back cover.
1. Disconnect the test leads from the Multimeter and any item under test.
2. Loosen the screws on the back cover using a Phillips head screwdriver.
3. Remove the old fuse from its holder by gently pulling it out.
4. Install the new fuse into the holder.
5. Always use a fuse of the proper size and value (0.5A/1000V fast blow for the 400mA range,
10A/1000V fast blow for the 10A range).
6. Put the fuse back cover back in place. Insert the screws and tighten it securely.
WARNING: To avoid electric shock, do not operate your Multimeter until the back cover is in
place and fastened securely.

THE ENVIRONMENT
DECLARATION OF CONFORMITY
We hereby certify that the AUTO RANGING DIGITAL
MULTIMETER (ORDER CODE: OXD-516-6487F)
Complies with all the relevant provisions of the
EMC Electromagnetic Compatibility Directive 2014/30/EU
Standards Applied: EN61326-1:2013, EN61326-2-1:2013,
IEC61326-1:2012, IEC61326-2-1:2012
LVD Low Voltage Directive 2014/35/EU
Standards Applied: EN61010-1:2010, EN61010-2-033:2012, EN61010-031:2015
RoHS2 Restriction of Hazardous Substances Directive 2011/65/EU
Signed:
Date: September 2019
Name: Toni Johnson
Position: Compliance Director.
Always dispose of unwanted tools, accessories and packaging materials in an
environmentally friendly manner.
In observance of European Directive on Waste Electrical and Electronic
Equipment (WEEE) and its implementation in accordance with national law,
electrical goods that have reached the end of their life must be collected
separately and returned to an environmentally compatible recycling facility.
Do not dispose of electrical goods with domestic waste materials as
inappropriate disposal may cause potential hazards to the environment and
human health.
For further information, please contact your local authority or the retailer from
whom you purchased the product.
QUALITY GUARANTEE & WARRANTY
OXFORD PRECISION products carry a one year manufacturer’s warranty.
OXFORD PRECISION products are designed & manufactured
to the highest standards & specications.
Assuring the quality and performance required by all sectors of industry.
OXFORD PRECISION products are fully guaranteed against faulty materials & workmanship.
Should they be found to be defective, they will either be repaired or replaced
free of charge (fair wear and tear and/or misuse excepted).
Please retain supplier invoice as proof of purchase.
OXFORD PRECISION
P.O. Box 14, Wigston, Leicester,
England, LE18 1AT.