Metrix MX 67 User manual

PRESS TO RE-POWER
TESTER
MX67
METRIX
ELECTRONICS
OPERATING
INSTRUCTIONS
MX 67
DIGITAL TESTER
(WITH BACK LIGHT)
SAFETY INFORMATION
The following safety information must be
observedtoinsuremaximumpersonalsafety
during the operation of this meter:
1. Do not use if the meter or test leads look
damaged,orifyou suspectthatthemeter
is not operating properly.
2. This meter is not recommended for high
voltage industrial use; for example, not
for measurements of 440 VAC or 600
VAC industrial power mains. The unit is
intended for use with low energy circuits
to 600V AC/DC or high energy circuit to
250 VAC or DC.
3. Use caution when working above 60V dc
or 30V ac rms. Such voltages pose a
shock hazard.
4.Whenusingtheprobes,keepyourfingers
behind the finger guards on the probes.
5. Measuring voltage which exceeds the
limits of the meter may cause damage
and expose the operator to a shock haz-
ard. Always respect the voltage limits as
stated on the meter.
6. If the equipment is used in a manner not
specified by the manufacturer, the pro-
tection provided by the equipment may
be impaired.
7. Fused test leads in accordance with
H.S.E. guidance note GS38 should be
used in high energy circuits.
SPECIFICATIONS
Display: 3½ digit liquid crystal display (LCD) with a maximum reading of
3200.
Analogbargraph: 32segmentswithmeasurements12timespersecond.
Polarity: Automatic, (-) negative polarity indication.
Overrange: "OL" mark indication.
Low battery indication: The " " is displayed when the battery voltage
drops below the operating level.
Auto power-down: After 10 mins, Back-Light after 30 secs approx.
Measurement rate: 2 times per second, nominal.
Operating environment: 0°C to 40°C at <70% relative humidity.
Storage environment: -20°C to 60°C at <80% relative humidity.
Safety: According to EN61010-1 protection class II overvoltage category
(CAT II 600V) pollution degree 2.
Power: 4 pcs 1.5V (AAA size) UM-4 R03.
Battery life: 500 hours typical with alkaline.
Dimensions: 170mm (H) x 44mm (W) x 40mm (D).
Weight: 140g including batteries.
VOLTAGE
(40 / 500Hz)
Range DC Accuracy AC Accuracy Input impedance Maximum input
320mV
0.25%rdg+1dgt
No range >1000ΜΩ
600VDC or ACrms
3.2V
1.0%rdg+4dgts
11ΜΩ
32V
10ΜΩ
320V
600V
OHM
Range Resolution Accuracy Test Current Input protection
320Ω 0.1Ω 0.3%rdg+3dgts < 0.7mA
500VDC or ACrms
3.2ΚΩ 1Ω
0.3%rdg+1dgt
< 0.13mA
32ΚΩ 10Ω < 13µA
320ΚΩ 100Ω < 1.3µA
3.2ΜΩ 1ΚΩ 1.2%rdg+1dgt < 0.13µA
32ΜΩ 10ΚΩ 3.0%rdg+1dgt
DIODE Test 0-2.0 1mV 3.0%rdg+3dgts 0.8mA±0.6mA 500VDC or ACrms
CONTINUITY
Check Range Resolution Audible indication Test Current Input protection
320Ω 0.1Ω <20Ω±5Ω <0.7mA 500VDC or ACrms
OPERATION
Before taking any measurements, read the Safety Information Section.
Always examine the instrument for damage, contamination (excessive
dirt,grease, etc.) anddefects.Examine the testleads for crackedorfrayed
insulation. If any abnormal conditions exist do not attempt to make any
measurements.
Autoranging
The meter defaults to autorange when you turn it on. In autorange, the
meter selects the range automatically.
MX 67-MOD (NSN 6625-99-0834221)

Manually Selecting a Range
Themeteralso hasamanualrangemode.Inmanualrange, youselectand
lock the meter in a range. To manually select a range:
Press [RANGE] button to hold the selected range. The symbol is
displayed. Subsequently pressing the [RANGE ] button will select each
range in sequence from the lowest to highest range. Hold the button for 2
seconds to return to the Autorange Mode.
Mode Switch ( ), (W)
Press this switch to toggle between DC and AC in the voltage measure-
ments. Press this switch to toggle between the W/continuity/diode modes,
if the function switch is set to Wposition.
Back-Light and Data-Hold Switch ( >2sec),( H):
PressthisbuttonbrieflytoactivateDATA-HOLDmode.The Hannunciator
is displayed.
Press this button for two seconds to turn the Back-Light on. As this also
activates the DATA-HOLD mode, briefly press the button to return to
normaldisplay.To turnthe Back-Lightoffpress againfor twoseconds.The
Back-Light will switch-off automatically after about 30 seconds.
Auto Power-Down Mode:
If unused for about 10 minutes, the tester will power-down automatically.
Press any of the three button switches to resume power-on mode.
Voltage Measurements
1. Connect a red test probe to the "VW" jack and the black test lead to the
"COM" jack.
2.SettheFunctionswitchtothedesiredvoltageandpressthemodeswitch
to select DC or AC.
3. Touch the probes to the test points, the range will change automatically
to the level that will display the input voltage with best resolution.
4. The value indicated in the display window is the measured value of
voltage with proper decimal point and annunciator indication.
5. For dc, a (-) sign is displayed for negative polarity; positive polarity is
implied.
Resistance Measurements
1. Set the Function switch to the " W" position.
2. Turn off power to the circuit under test. External voltage across the
components causes invalid readings.
3. Connect a red test probe to the "VW" jack and the black test lead to the
"COM" jack.
4. Connect the test leads to the measurement points and read the value
from the display.
Testing Diodes
1. Set the Function switch to Wposition.
2. Turn off power to the circuit under test. External voltage across the
components causes invalid readings.
3. To toggle between the W/continity/diode modes, press Mode Switch.
4. Touch probes to the diode. A forward-voltage drop is about 0.6V (typical
for a silicon diode).
5. Reverse probes. If the diode is good, "OL" is displayed. If the diode is
shorted, a value near 0mV will be displayed.
6. If the diode is open, "OL" is displayed in both directions.
Continuity Measurements
1. Set the Function switch to Wposition.
2. Turn off power to the circuit under test. External voltage across the
components causes invalid readings.
3. To toggle between the W/continity/diode modes, press Mode Switch.
4. Connect the test leads to the two points at which continuity is to be
tested. The buzzer will sound if the resistance is less than approxi-
mately 20W±5W.
MAINTENANCE
Battery Replacement
Power is supplied by four 1.5V (AAA size) batteries. The " " appears on
the LCD display when replacement is needed.To replace the batteries,
remove the screw from the back of the meter and lift off the battery cover
case. Remove the batteries from battery contacts.
Cleaning
Periodically wipe the case with a damp cloth and detergent, do not use
abrasives or solvents.
WARNING
Remove test leads before changing batteries
or performing any servicing.
METRIX ELECTRONICS LTD
Minchens Court, Michens Lane, Bramley
Tadley, Hampshire, RG26 5BH, U.K.
Tel: [phone] Fax: [phone]
E-mail:[email protected]
DEC. 04