Equus 4320 User Manual
SAFETY PRECAUTIONS/ WARNINGS
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This Digital Multimeter is intended for INDOOR USE ONLY.
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Pay close attention to WARNINGS stamped on the front and rear of the
meter's case.These warnings, as well as all war nings and precautions used
through out this manual, must be followed to avoid electric shock and/or personal injury.
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The RESPONSIBLE PARTY shall be made aware that, if the equipment is
used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.
To prevent electrical shock and/or damage to the tester or the equipment under
test, observe the following safety precautions:
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DO NOT apply more than the rated voltage, as marked on the meter,
between terminals or between any terminal and earth ground.
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Use caution when working above 30V AC rms, 42 V peak, or 60 V DC.Such
voltages pose a shock hazard.
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To avoid false readings that could lead to possible electric shock or personal
injury, replace the batteries as soon as the low battery indicator displays.
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Use ONLY those test leads or probes provided with the meter.DO NOT use thirdparty test leads or probes.
•
Always inspect the multimeter, test leads and any other accessories for damage
prior to every use.If any damage is found, do not use tester until repairs are done.
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Always consider electrical and electronic equipment to be energized (live).
Never assume any equipment is de-energized.
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Never ground yourself when taking electrical measurements.Isolate yourself
from ground by using dry rubber insulating mats to cover all e xposed/g rounded metal. Stand on rubber mats and wear dry clothing.
SPECIFICATIONS
GENERAL SPECIFICATIONS AND FEATURES
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3-½ digit LCD display (maximum reading of 2000)
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Manual range control
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Automatic negative (-) polarity indication
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Automatic zero adjustment
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Over range indicator (except 10 A function).Displays "1" on LCD
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Low battery indicator.Displays battery symbol on LCD
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Safety standard:CE EMC/LVD.The meter is up to the standards of IEC1010
Pollution Degree 2, over voltage Category II (signifies protection against
transient impulses at the local level mains electrical supply).
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Equipment marked is protected throughout by Double or Reinforced Insulation.
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Operating environment:
Temperature - 32° to 104° F. (0° C to 40° C)
Humidity - Less than 80% relative humidity (non-condensing)
Altitude - up to 6562 ft (2000 meters)
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Storage environment:
Temperature - 4° to 140° F (- 20° to 60° C)
Humidity - Less than 90% relative humidity (non-condensing)
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Power Supply:One 9-volt (6F22) batter y
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Fuse:315mA/250V 5X20 mm (Radio Shack, GMA/217 series;#270-1046) fuse
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Dimensions:
Height - 5.50 in. (139 mm)
Width - 3.50 in. (89 mm)
Depth - 1.25 in. (32 mm)
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Weight (including batteries): approximately 5.7 oz (170 g)
ELECTRICAL SPECIFICATIONS
Accuracy of specifications in the following tables are based on an operating temperature of 64°F to 82°F (18°C to 28°C) and a relative humidity of less than 75%.
Maximum voltage from V ma socket to COM socket is 500V AC/DC;from COM
socket to ground is 300V AC/DC.
DC VOL TS
RESISTANCE (OHMS)
DIODE TEST
CONTINUITY
DC AMPS
BA TTER Y TEST
AC VOLTS
TESTING PROCEDURES
A. AC/DC V OL TAGE MEASUREMENT
1. Plug the BLACK test lead into "COM" jack of the multimeter; plug the RED
test lead into the "V" jack.
2. Set the meter’s Function/Range Selector Switch to the appropriate ACV or
DCV position as desired.
3. Place the RED test lead onto the positive (+) side of the item being tested
and the BLACK test lead onto the negative (-) (across the source/load) side
of the item. BE CAREFUL not to touch any energized conductors with any
part of your body.
4. Read the results on the display.
Range Resolution Accuracy Overload
Protection
200Ω 0.1Ω
±(1% of reading
2KΩ 1Ω
+ 5 digits)
250V DC/AC RMS
20KΩ 10Ω
200KΩ 100Ω
20M Ω 10K Ω ±(2% of reading
+ 5 digits)
Open Circuit Voltage: Approximately 3V
Function Range Resolution Accuracy Overload
Protection
Diode test 1mV 0.5 ~ 0.8V 250V
DC/AC
RMS
Open Circuit Voltage: Approximately 2.8V
Forward V oltage Drop: Approximately 1mA
Range Resolution Accuracy Overload
Protection
2000µA1µA
20mA
10µA
±(1.5% of reading
0.315A/250V fuse
200mA
100µA
+ 5 digits)
10A 10mA ±(2% of reading Non-Protected
+ 5 digits)
Measuring time is equal to or less than 15 seconds and time
interval is equal to or over 15 minutes.
Range Resolution Overload Protection
1.5V
10mV
0.315A/250V fuse
9V
Overload
Range Resolution Accuracy Protection
200V 100mV ±(1.2% of reading
500V DC or AC
500V 1V
+ 10 digits)
Frequency: 40-400Hz
OWNER’S MANUAL
DIGITAL MULTIMETER
MRP #93-0003
Threshold Continuity Beeper Response Time
*100 Ω (ohms) 4.0K Hz <100 ms
*Beeper will sound only if resistance (continuity) being measured is
under 100 Ω
Range Resolution Accuracy Overload
Protection
200mV 100µV 230 Vrms
2V 1mV ±(0.8% of reading
20V 10mV
+ 5 digits)
500V DC
200V 100mV or AC
500V 1V ±(0.8% of reading
+ 5 digits
Input impedance: 10MΩ for all ranges.
WARNING
To a v oid possible electric shoc k,instrument damage and/or equipment
damage, DO NOT attempt to measure voltages ABOVE 500V AC/DC or
take measurements if the voltage is unknown.500V AC/DC between the
COM and V jacks is the maximum voltage that this instrument is
designed to measure.The "COM" terminal potential should not exceed
300V AC/DC measured to ground.
B. RESISTANCE MEASUREMENT ΩΩ(OHMS)
1. Plug the RED test lead into the "ΩΩ" jack of the multimeter; plug the BLACK
test lead into the "COM" jack.
2. Set the meter’s Function/Range Selector Switch to the OHM "ΩΩ" range
function.
3. Place the RED test lead onto one side of the item being tested and the
BLACK test lead onto the other side of the item. (Polarity does not matter
when checking resistance).
4. Read the results on the display.
C. DIODE TEST
1. Plug the RED test lead into the jack of the multimeter; plug the BLACK
test lead into the "COM" jack.
2. Set the meter’s Function/Range Selector Switch to the position.
3. Place the RED test lead onto one side of the diode being tested and the
BLACK test lead onto the other side.
4. Read the results on the display.
5. Reverse the test leads and again read the results on the display. Compare
the two readings. One reading should indicate a voltage drop value; the
other reading should indicate an overrange (1) condition.
D. CONTINUITY TEST
1. Plug the RED test lead into the jack on the Analyzer; plug the BLACK
test lead into the “COM” jack.
2. Set the Function/Range Selector Switch to the position.
3. The beeper will sound only if the continuity of the item under test (resist-
ance between the two test leads) measures less than 30 ohms.
E. DC CURRENT MEASUREMENT (AMPS)
1. Plug the RED test lead into the "mA" or the "DC10A" jack of the multime-
ter, as applicable;plug the BLACK test lead to the "COM" jack.
2. Set the meter's Function/Range Selector Switch to the appropriate Amps
range position as desired.
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To measure from 0 to 200mA, set the Selector Switch to the desired
"DCmA" position.
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To measure from 200mA to 10 Amps DC, set the Selector Switch to the
"DC10A" position.
3. Disconnect the battery, or shut off the power to the circuit being tested.
4. Disconnect one end of the wire or device, from the circuit where current will
be measured.
5. Place the RED test lead on the disconnected wire and place the BLACK
test lead at the location from which the wire was disconnected (series connection).
6. Reconnect the battery, or apply power to the circuit being tested.
7. Read the results on the display.
CAUTION: After the test is completed, shut the power off to the circuit
before removing the test leads and before reconnecting any disconnected
wires or devices.
F . BA TTERY TEST
1. Plug the RED test lead into the "BAT. " jack of the multimeter; plug the
BLACK test lead into the "COM" jack.
2. Determine the voltage rating of the battery to be tested.
3. Set the meter’s Function/Range Selector Switch to the desired "Battery
Test" range.
4. Place the RED test lead on the positive post of the battery under test; place
the BLACK lead on the negative post.
5. Read the results on the display.
MAINTENANCE
1. No periodic maintenance is required other than the replacement of the battery,
the fuse, and visual inspection of the meter.
2. Keep the meter clean and dry. DO NOT use solvent to clean, use a damp
(not wet) cloth and fully dry after cleaning.
BATTERY AND FUSE REPLACEMENT
1. Turn the Digital Multimeter “OFF” and remove the test leads.
2. Remove the two screws on the back of the meter and separate the case.
3. Replace the fuse or battery as necessary:
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For battery replacement: Remove the battery from the battery compartment and replace only with one 9-volt alkaline battery.
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For fuse replacement: Remove the fuse from the fuse holder and
replace with a 0.315A/250V - UL Listed Bussmann, GMA Type
(Radio Shack GMA/270 series; #270-1046 ) fuse.
NOTE: Use a 0.315A/250V, 5x20mm type fuse ONLY - Bussmann, GMA Type
(Radio Shack #270-1046 or similar). Using an incorrect fuse may result in serious injury and/or damage to the unit.
4. Reassemble the case and secure with the two screws.
LIMITED ONE YEAR WARRANTY
The Manufacturer warrants to the original purchaser that this unit is free of
defects in materials and workmanship under normal use and maintenance for
a period of one (1) year from the date of original purchase.
If the unit fails within the one (1) year period, it will be repaired or replaced, at
the Manufacturer’ s option, at no charge, when returned prepaid to the Service
Center with Proof of Purchase. The sales receipt may be used for this purpose. Installation labor is not covered under this warranty. All replacement
parts, whether new or remanufactured, assume as their warranty period only
the remaining time of this warranty.
This warranty does not apply to damage caused by improper use, accident,
abuse, improper voltage, service, fire, flood, lightning, or other acts of God, or
if the product was altered or repaired by anyone other than the Manuf acturer’s
Service Center.
The Manufacturer, under no circumstances shall be liable for any consequential damages for breach of any written warranty of this unit.This warranty gives you specific legal rights, and you may also have rights, which vary
from state to state.This manual is copyrighted with all rights reserved.No portion of this document may be copied or reproduced by any means without the
express written permission of the Manufacturer. THIS WARRANTY IS NOT
TRANSFERABLE. For service, send via U.P.S. (if possible) prepaid to
Manufacturer. Allow 3-4 weeks for service/repair.
SERVICE PROCEDURES
If you have any questions, require technical support or information on
UPDATES and OPTIONAL ACCESSORIES, please contact your local store,
distributor or the Service Center.
USA & Canada:
Technical Service Center
17291 Mt. Herrmann Street
Fountain Vally, CA 92708 U.S.A.
(800) 544-4124 (6:00 AM-6:00 PM, Monday-Friday PST)
All others: (714) 241-6802 (6:00 AM-6:00 PM, Monday-Friday PST)
FAX: (714) 432-7511 (24 hr.)
Web: www
.iEQUUS.com
© Innova 2006
WARNING
Resistance measurements must be made on "de-energized" (dead) circuits ONLY.Impressing a voltage across the multimeter's terminals while
set to any resistance range may result in electric shock,instrument damage and/or damage to equipment under test. MAKE SURE equipment is
completely de-energized before taking any resistance measurements.
WARNING
To avoid electrical shock and/or damage to the multimeter, ensure the
power is removed from the circuit before any DIODE testing procedure
is conducted. Test diodes on de-energized (dead) circuits only, never
on live circuits.
WARNING
To pre vent electrical shock when performing current measurements,follow
all steps as indicated below DO NOT skip any steps or take an y short cuts.
The DC10A range is not fused.To avoid current hazard and/or damage
to the tester, DO NOT try to take measurements on circuits that have
more than 10 amps. DO NOT take more than 15 seconds to take the
reading. A waiting period of AT LEAST 15 MINUTES is necessary
between every 15 second testing period.
WARNING
When replacing the battery or the fuse, remove only the rear panel. Do
not remove or disassemble the circuit board or the front panel, these
items are not serviceable and if disassembled there is the possibility of
loose metal parts shorting the circuit board and causing an electrocution danger to the user.
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