Associated Research 620L Operation manual

OPERATION AND SERVICE MANUAL
MODEL 620L
Line Leakage Tester
Fully Automated Line Leakage Tester
SERIAL NUMBER
Model 620L
Item 38837, Ver. 1.24
Printed July 20, 2017
Associated Research
28105 North Keith Dr. - Lake Forest, IL 60045 USA
T. 1-847-367-4077 F. 1-847-367-4080
[email protected] www.arisafety.com

2
DECLARATION OF CONFORMITY
Manufacturer: Associated Research, Inc.
Address: 13860 W. Laurel Dr.
Lake Forest, IL 60045 USA
Product Name: Line Leakage Tester
Model Number: 620L
Conforms to the following Standards:
Safety: IEC 61010-1:2010, IEC 61010-2-030:2010
EN 61010-1:2010, EN 61010-2-030:2010
UL 61010-1:2012, UL 61010-2-030:2012
CAN/CSA-22.2 NO. 61010-1-12
CAN/CSA-22.2 NO. 61010-2-030-12
EMC: EN 61326-1:2013
(EN 55011:1998/A2:2002 Class A,
EN 61000-3-2:2006,
EN 61000-3-3:1995/A1:2001/A2:2005,
IEC 61000-4-2:1995/A2:2000,
EN 61000-4-3:2002,IEC 61000-4-4:2004,
IEC 61000-4-5:1995/A1:2000,
IEC 61000-4-6:2003,
IEC 61000-4-8:1993/A1:2000,
IEC 61000-4-11:2004)
Supplementary Information
The product herewith complies with the requirements of the Low Voltage Directive
2014/35/EU, EMC Directive 2014/30/EU and the RoHS Directive 2011/65/EU with respect
to the following substances: Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent
chromium (Cr (VI)), Polybrominated biphenyls (PBB), Polybrominated diphenyl ethers
(PBDE), Deca-BDE included.
Last two digits of the year in which the CE marking was affixed: 08
The technical file and other documentation are on file with Associated Research,
Inc.
______________________________
Joseph Guerriero,President
Associated Research, Inc.
Lake Forest, Illinois USA
July 20, 2017

TABLE OF CONTENTS
1. INTRODUCTION ..........................................................................................................1
1.1. Warranty Policies...........................................................................................1
1.2. Safety Symbols...............................................................................................3
1.2.1. Product Marking Symbols....................................................................3
1.2.2. Caution and Warning Symbols...........................................................3
1.3. Glossary of Terms..........................................................................................3
1.4. Safety...............................................................................................................5
1.4.1. Service and Maintenance....................................................................5
1.4.2. Test Station............................................................................................6
1.4.3. Test Operator.........................................................................................7
1.5. Key Features of the 620L............................................................................8
2. GETTING STARTED .................................................................................................10
2.1. Unpacking and Inspection..........................................................................10
2.1.1. Packaging.............................................................................................10
2.1.2. Contents of Carton..............................................................................10
2.2. Installation.....................................................................................................11
2.2.1. Work Area ............................................................................................11
2.2.2. Power Requirements..........................................................................11
2.2.3. Basic Connections..............................................................................12
2.2.4. Environmental Conditions..................................................................13
3. SPECIFICATIONS AND CONTROLS....................................................................14
3.1. 620L Functional Specifications..................................................................14
3.2. Instrument Controls .....................................................................................20
3.2.1. Front Panel Controls...........................................................................20
3.2.2. Rear Panel Controls...........................................................................22
4. PROGRAMMING INSTRUCTIONS.........................................................................27
4.1. Power Up.......................................................................................................27
4.2. Setup System ...............................................................................................27
4.2.1. Setup System Keys ............................................................................28
4.2.2. Time and Date.....................................................................................28
4.2.3. Calibration Alert...................................................................................29
4.2.4. Hardware..............................................................................................32
4.2.5. Security.................................................................................................34
4.2.6. Power-On Screen ...............................................................................36
4.2.7. Default System Parameters ..............................................................38
4.3. Setup Tests Menu........................................................................................38
4.3.1. Add........................................................................................................39
4.3.2. Edit ........................................................................................................39
4.3.3. Delete....................................................................................................39
4.3.4. Prompt ..................................................................................................39
4.3.5. File.........................................................................................................41

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4.3.6. Fail Stop ...............................................................................................42
4.4. Test Parameters...........................................................................................43
4.4.1. Description of Test Parameters........................................................43
4.4.2. Default Parameters.............................................................................45
4.5. Setting Up a Test .........................................................................................47
4.5.1. General Test Procedures...................................................................47
4.5.2. Line Leakage Test ..............................................................................49
5. OPERATING INSTRUCTIONS................................................................................56
5.1. Instrument Connections..............................................................................56
5.1.1. DUT-Input Voltage Connections.......................................................56
5.1.2. Connecting the Test Leads ...............................................................57
5.1.3. DUT Output Connections...................................................................57
5.1.4. Adapter Box Connections..................................................................58
5.1.5. Interlock Connector.............................................................................59
5.2. Perform Tests Menu....................................................................................59
5.2.1. Load File...............................................................................................60
5.2.2. Single Step...........................................................................................60
5.2.3. Fail Stop ...............................................................................................61
5.2.4. Results..................................................................................................61
5.3. Performing a Test.........................................................................................63
5.4. Perform Tests Metering...............................................................................64
5.5. Displayed Messages ...................................................................................65
5.5.1. Test Status Messages........................................................................65
5.5.2. Error Messages...................................................................................65
6. CONNECTION OF REMOTE I/O.............................................................................69
6.1. Remote Signal Outputs...............................................................................69
6.2. Remote Signal Inputs and Memory Access.............................................70
6.3. Remote Interlock..........................................................................................71
7. BUS REMOTE INTERFACE GPIB / RS-232.........................................................73
7.1. RS-232 Interface..........................................................................................73
7.1.1. RS-232 Connector..............................................................................73
7.1.2. Communications Port Configuration................................................74
7.1.3. Sending and Receiving Commands.................................................75
7.2. GPIB Interface..............................................................................................75
7.2.1. GPIB Connector..................................................................................75
7.2.2. GPIB Address......................................................................................76
7.3. Interface Functions......................................................................................76
7.4. RS-232 / GPIB Interface Command List..................................................76
7.4.1. Echo and Response Considerations ...............................................76
7.4.2. Test Execution Commands...............................................................77
7.4.3. File Editing Commands......................................................................77
7.4.4. Test Parameter Editing Commands and Companion Queries ....83

7.4.5. System Parameter Editing Commands and Companion Queries84
7.4.6. Query Commands...............................................................................85
7.4.7. IEEE 488.2 Common Commands....................................................87
7.4.8. Status Reporting .................................................................................89
7.4.9. GPIB Service Request.......................................................................90
7.5. Non-Volatile Memory...................................................................................92
8. OPTIONS.....................................................................................................................95
8.1.1. GPIB Interface.....................................................................................95
8.1.2. Functional Run Test Function...........................................................95
8.1.3. Hipot/Ground Bond Interconnect......................................................97
8.1.4. Scanner ..............................................................................................102
8.1.5. LineChek to APT 7 Memory...............................................................104
9. CALIBRATION PROCEDURE...............................................................................145
9.1. Warranty Requirements............................................................................145
9.2. Calibration Initialization.............................................................................146
9.2.1. Calibration of Run Test Voltage......................................................147
9.2.2. Calibration of Run Test Current......................................................148
9.2.3. Calibration of Run Test Current......................................................149
9.2.4. Calibration of Run Test Power........................................................150
9.2.5. Calibration of Run Test Power........................................................151
9.2.6. Calibration of Run Test Leakage....................................................152
9.2.7. Calibration of LLT MD V Offset.......................................................153
9.2.8. Calibration of LLT MD Volts x 0.1...................................................154
9.2.9. Calibration of LLT MD Volts x 1......................................................155
9.2.10. Calibration of LLT MD Volts x 4....................................................156
9.2.11. Calibration of LLT MD Volts x 16..................................................157
9.2.12. Calibration of LLT MD Volts x 64..................................................158
9.2.13. Calibration of LLT MD Volts x 256 ...............................................159
9.2.14. Calibration of LLT MD Volts x 0.1.................................................160
9.2.15. Calibration of LLT MD Volts x 0.1.................................................161
9.2.16. Calibration of LLT MD Volts x 1....................................................162
9.2.17. Calibration of LLT MD Volts x 1....................................................163
9.2.18. Calibration of LLT MD Volts x 4....................................................164
9.2.19. Calibration of LLT MD Volts x 4....................................................165
9.2.20. Calibration of LLT MD Volts x 16..................................................166
9.2.21. Calibration of LLT MD Volts x 16..................................................167
9.2.22. Calibration of LLT MD Volts x 64..................................................168
9.2.23. Calibration of LLT MD Volts x 64..................................................169
9.2.24. Calibration of LLT MD Volts x 256 ...............................................170
9.2.25. Calibration of LLT MD Volts x 256 ...............................................171
9.2.26. Calibration of LLT MD: UL544NP measuring device ................172
9.2.27. Calibration of LLT MD: UL 544P measuring device..................173
9.2.28. Calibration of LLT MD: ICE601-1 measuring device.................174
9.2.29. Calibration of LLT MD: UL1563 measuring device....................175
9.2.30. Calibration of LLT MD: External ...................................................176
9.2.31. Calibration of LLT MD: IEC60990 FIG4 measuring device......177

iv
9.2.32. Calibration of LLT MD: IEC 60990 FIG5 measuring device.....178
10. REPLACEMENT PARTS LIST............................................................................179
11. INDEX.......................................................................................................................215

1
1. INTRODUCTION
1.1. Warranty Policies
Associated Research, Inc., certifies that the instrument listed in this manual meets or
exceeds published manufacturing specifications. This instrument was calibrated using
standards that are traceable to the National Institute of Standards and Technology
(NIST).
Your new instrument is warranted to be free from defects in workmanship and material
for a period of (3) year from the date of shipment. You must complete the online
registration at www.asresearch.com/register or call 1-800-858-TEST (8378) ext. 0 to
register over the phone.
5-Year Program
All Associated Research instruments include the opportunity to extend the standard
warranty for up to a period of 5 years. Returning instruments to Associated Research
for their annual calibration and inspection will extend the instrument's warranty for an
additional year. This warranty is extendable for up to five years and annual returns
must be made in succession starting one year after the original purchase date. There
are no additional costs for the 5 year product warranty. The only annual costs to the
customer are the standard calibration fees and shipping costs. This extended warranty
is non-transferable and is offered only to the original purchaser. A return material
authorization (RMA) must be obtained from Associated Research, Inc. before
returning this instrument for warranty service. Please contact our customer support
center at 1-800-858-TEST (8378) to obtain an RMA number. It is important that the
instrument is packed properly for safe transport. Please contact our customer support
center for proper instructions on packaging. Damages sustained as a result of
improper packaging will not be honored. Transportation costs for the return of the
instrument for warranty service must be prepaid by the customer. Associated
Research, Inc. will assume the return freight costs when returning the instrument to
the customer. The return method will be at the discretion of Associated Research,
Inc.
Except as provided herein, Associated Research, Inc. makes no warranties to the
purchaser of this instrument and all other warranties, express or implied (including,
without limitation, merchantability or fitness for a particular purpose) are hereby
excluded, disclaimed and waived.

2
Operator Modifications
Any non-authorized modifications, tampering or physical damage will void this
warranty. Elimination of any connections in the earth grounding system or bypassing
any safety systems will void this warranty. This warranty does not cover accessories
not of Associated Research, Inc. manufacture. Parts used must be parts that are
recommended by Associated Research, Inc. as an acceptable specified part. Use of
non-authorized parts in the repair of this instrument will void the warranty.
Associated Research, Inc. will not be responsible for any injuries sustained due to
unauthorized equipment modifications or use of parts not specified by Associated
Research, Inc. Instruments returned to Associated Research, Inc. with unsafe
modifications will be returned to their original operating condition at the customer’s
expense.

3
1.2. Safety Symbols
1.2.1. Product Marking Symbols
Product will be marked with this symbol when it is necessary to refer to the
operation and service manual in order to prevent injury or equipment
damage.
Product will be marked with this symbol when hazardous voltages may be
present.
Product will be marked with this symbol at connections that require earth
grounding.
1.2.2. Caution and Warning Symbols
Calls attention to a procedure, practice, or condition that could
possibly cause bodily injury or death.
Calls attention to a procedure, practice, or condition that could
possibly cause damage to equipment or permanent loss of data.
1.3. Glossary of Terms
(As used in this manual)
Alternating Current, AC: Current that reverses direction on a regular basis. Utility power is
usually generated in the form of a sinusoid at a frequency of 60 times per second in the United States
and 50 times per second in other countries.
Arc: A partial momentary breakdown due to the force of a strong electric field on closely spaced
conductors, sometimes evidenced by corona or a luminous flashover.
Breakdown: The failure of insulation to effectively prevent the flow of current. If the test voltage is
gradually raised, breakdown will begin suddenly at a certain voltage level and current flow will not be
directly proportional to voltage. Once a breakdown occurs, especially for a period of time, the next
gradual application of voltage will often cause a breakdown to begin at a lower voltage.
Conductor: A solid or liquid material which permits the flow of electrons. A material which has a
volume resistivity of no more than 103 Ω-cm.
Current: The movement of electrons through a conductor. Current is measured in amperes (A),
milliamperes (mA), microamperes (uA). Symbol = I
Dielectric: An insulating material that is positioned between two conductive materials in such a way
that a charge or voltage may appear across the two conductive materials.

4
Direct Current, DC: Current that flows in one direction only. The source of direct current is said to
be polarized and has one terminal that is always at a higher potential than the other.
Frequency: The number of cycles an AC waveform repeats over time. Usually given in Hertz (Hz).
Ground: Refers to the point of low potential in a circuit to which all other voltages are referenced.
May or may not be tied to the earth. Also referred to as Earth.
Hot: Used to refer to the test lead or output side of an instrument that is at high potential.
Impedance: The property of capacitive or inductive items to limit certain frequencies.
Insulation: Gas, liquid or solid material which has a volume resistivity of at least 1012 Ω-cm and is
used for the purpose of restricting current flow between conductors.
Leakage: AC or DC current flow through insulation and over its surfaces. Current flow is directly
proportional to voltage. The insulation is thought of as a constant impedance unless breakdown
occurs.
Neutral: The point of low potential in a circuit to which all other voltages are referenced. Also known
as Common.
Peak Current: The maximum amplitude of an AC current waveform. For a sinusoid, 1.414 x the
RMS value.
Power: The amount of work performed by an energy source over time, given in Watts (W).
PF (Power factor): Power Factor = W/VA where W =Watts (Real Power) and VA =Volts x Amps
(apparent power). It is important to note that the closer the power factor is to "1" the more resistive the
DUT is. The closer the power factor is to 0 the more reactive (inductive or capacitive) the DUT is.
Reactive Current: The current component due to the reactive impedance of a load. Also called
imaginary current.
Real Current: The current component due to the resistance of a load.
Resistance: The property of a substance that impedes current and results in the dissipation of
power in the form of heat. The practical unit of resistance is the ohm (Ω). Symbol = R
Return: The path by which current returns to a source.
RMS: The Root Mean Squared value of a voltage or current waveform. An RMS waveform delivers
the same amount of energy to a load as a DC waveform of the same value. For a sinusoid, the RMS
value is .707 x the peak value.
Total Current:The vector sum of the real current component and the reactive current component
produced by an applied voltage.

5
The 620L produces voltages
and currents that can cause
harmful or fatal electric
shock. To prevent
accidental injury or death,
these safety procedures
must be strictly observed
when handling and using the
test instrument.
PHONE: [phone]
1 (800) 858-TEST (8378)
FAX: [phone]
E-MAIL: in[email protected]
This instrument
meets UL
requirements for
audible and visual
failure indication.
SAFETY
VA: A rating of instantaneous power found by multiplying an instrument’s maximum output current by
its maximum output voltage.
Voltage: The force which causes current through an electrical conductor, given in volts (V).
Symbol = V
1.4. Safety
This product and its related documentation
must be reviewed for familiarization with
safety markings and instructions before
operation.
This product is a Safety Class I instrument
(provided with a protective earth terminal).
Before applying power verify that the
instrument is set to the correct line voltage
(115 or 230) and the correct fuse is
installed.
This product carries an NRTL (Nationally
Recognized Testing Laboratory) and
comes equipped with an audible and visual failure indicator.
1.4.1. Service and Maintenance
User Service
To prevent electric shock do not remove the
instrument cover. There are no internal user
serviceable parts. Routine maintenance or
cleaning of internal parts is not necessary. Avoid
the use of cleaning agents or chemicals on the
instrument, as some chemicals may damage
plastic parts or lettering. Any external cleaning
should be done with a clean, dry or slightly damp
cloth. Schematics, when provided, are for
reference only. Refer servicing and certification to an Associated Research, Inc.
authorized service center.
Service Interval
Associated Research, Inc. will not be held liable for injuries suffered if the instrument
is not properly maintained and safety checked annually. See section 1.1. Warranty
Policies for more information.
ASSOCIATED RESEARCH, INC.
13860 WEST LAUREL DRIVE
LAKE FOREST, IL 60045-4546 U.S.A.

6
ESD TESTING
1.4.2. Test Station
Location
Select an area away from the mainstream of activity where employees do not walk
while performing their normal duties. If this is not practical because of production line
flow, then the area should be roped off and marked for HIGH VOLTAGE TESTING.
No employees other than test operators should be allowed inside.
If benches are placed back-to-back, be especially careful about the use of the bench
opposite the test station. Signs should be posted: “DANGER – HIGH VOLTAGE
TEST IN PROGRESS –UNAUTHORIZED PERSONNEL KEEP AWAY.”
Work Area
When possible, use the instrument on a non-conducting table or workbench. If you
cannot avoid using a conductive surface, be certain that it is connected to a good
earth ground and the high voltage connection is insulated from the grounded surface.
There should not be any metal in the work area between the operator and the location
where products being tested will be positioned. Any other metal in the work area
should be connected to a good ground, never left “floating”.
Keep the area clean and uncluttered. All test equipment and unnecessary test leads
should be removed from the test bench and put
away. It should be apparent to both the operator
and to any observers which product is under test,
which product is waiting to be tested and which
product has already been tested.
Power
Power to the test station should be arranged so that
it can be shut off by one prominently marked switch
located at the entrance to the test area. In case of
an emergency, anyone should be able to cut off the
power before entering the test area to offer
assistance.
More Information
For more information on setting up a safe work station, please visit the Events and
Training section of our website at http://www.asresearch.com/events-
training/Default.aspx
Electrical safety tests
should not be
performed in or around
ESD testing areas.
ESD methods should
not be employed during
electrical safety testing,
as this could cause a
hazardous condition for
equipment and test
operators.

7
KEY SAFETY POINTS TO
REMEMBER
1.4.3. Test Operator
This instrument generates voltages and currents that can cause
harmful or fatal electric shock and must only be operated by a
skilled worker trained in its use. The operator should
understand the electrical fundamentals of voltage, current, and resistance.
Do not touch the device under test, high voltage test lead,
alligator clip, or clip insulator once the test has been
started.
Do not touch the front panel when testing or after a
malfunction has occurred.
Rules
Operators should be thoroughly trained to follow all national safety standard
guidelines for electrical safety testing in the workplace. Defeating any safety system
should be considered a serious offense with severe penalties. Allowing unauthorized
personnel in the area during a test should also be dealt with as a serious offense.
Test operators should be familiar with methods to properly discharge a device under
test in case test leads become disconnected during testing.
Refer to the following standards for more information:
NFPA 70E
OSHA 1910 subpart (S)
EN50191
Dress
Operators should not wear jewelry that could accidentally complete a circuit.
ESD protocols should not be observed while performing
electrical safety tests. Intentionally grounding the test operator
could lead to a harmful or fatal electric shock.
Medical Restrictions
Personnel with heart ailments or
devices such as pacemakers should
be informed that the voltages and
currents generated by the instrument
are very dangerous. If contacted, the
instrument may cause heart-related
problems. Please have the test
operator consult a physician for
recommendations.
1.5.
Keep unqualified and
unauthorized personnel away
from the test area.
Arrange the test station in a safe
and orderly manner.
In case of any problem, turn off
the high voltage first.

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1.5. Key Features of the 620L
ENHANCED GRAPHIC LCD
DISPLAY
Provides the operator with the ability to complete
test setups and review results in an easy-to-use
interface. Eliminates the need to decipher cryptic
abbreviations. The graphic display makes testing
safer, easier and more reliable than ever before.
CAL-ALERT
Alerts the operator that the machine is due for
calibration in advance of the calibration due date.
SECURITY ACCESS
This allows the instrument to be setup to allow for
different levels of access to the instruments setup
programs. Users can setup passwords for
restricting access to certain parts of the menu.
50 PROGRAMMABLE TEST
SETUPS WITH 30 STEPS PER
SETUP
Each test setup can store up to 30 steps which
can be configured to perform any of the safety
tests. All steps can be linked together to form a
complete automated test routine. Each setup can
be named for easy identification and recall.
EXCLUSIVE PROMPT AND
HOLD FUNCTION
The 620L allows operators to setup a user-
configured message that is displayed in between
test steps. This is a very convenient feature for
applications where test leads need to be moved or
when DUT switches need to be activated as part
of the test cycle.
PLC REMOTE INPUTS &
OUTPUTS
Two standard 9 pin interfaces provide outputs for
PASS, FAIL, RESET and TEST IN PROCESS
signals. Inputs include TEST, INTERLOCK,
RESET and remote recall of MEMORIES 1 - 10.
Provides the user with the ability to operate the
620L through simple PLC relay control.
6 BUILT-IN MEASURING
DEVICES WITH EXTERNAL
CONNECTION CAPABILITY
The 620L has 6 built-in measuring devices as
specified by the most common industry standards.
In addition, operators may connect a custom
measuring device of their own to the external
measuring device inputs.
INTERCONNECTION
CAPABILITY WITH HIPOT
AND GROUND BOND
TESTERS
The 620L may be connected to a Hypot III, Hyamp
III, HypotULTRA III, or HypotMAX safety tester to
form a complete electrical safety testing system.

9
INTERCONNECTION
CAPABILITY WITH
MODULAR SCANNER
The 620L can be connected to an Associated
Research, Inc. SC6540 Modular Scanner for
multi-point testing capability.
RMS AND PEAK LEAKAGE
CURRENT READINGS
Select to monitor leakage current using RMS or
Peak readings during Line Leakage testing.
40 AMP CONTINUOUS
CURRENT CAPABILITY
The 620L can handle loads that require up to 40
Amps of continuous current during Line Leakage
and Run testing.
CONTINUOUS POWER
OUTPUT SELECTION
Power runs continuously between test steps for
more efficient testing.
INTERCONNECTION
CAPABILITY WITH
ASSOCIATED POWER
TECHNOLOGIES AC POWER
SOURCE
The 620L may be connected with an Associated
Power Technologies power source for clean DUT
power. Up to 7 pre-set memories may be
selected from the 620L menu system DUT’s that
require multiple input waveforms.
BUILT IN GFI CIRCUIT
The 620L contains a built-in GFI circuit that
monitors DUT input power. This feature
safeguards the operator if excessive current
flowing to ground is detected.

10
2. GETTING STARTED
Introduction
This section contains information for the unpacking, inspection, preparation and
storage of your Associated Research, Inc., product.
2.1. Unpacking and Inspection
2.1.1. Packaging
Your instrument was shipped in a custom foam insulated container. If the shipping
carton is damaged, inspect the contents for visible damage such as dents, scratches
or a broken display. If the instrument is damaged, notify the carrier and Associated
Research, Inc.’s customer support department. Please save the shipping carton
and packing material for the carrier’s inspection. Our customer support
department will assist you in the repair or replacement of your instrument. Please do
not return your product without first notifying us and receiving an RMA (return material
authorization) number. To receive an RMA number, please contact our customer
support department at 1-800-858-TEST (8378).
2.1.2. Contents of the Carton
Inside the carton should be the following:
Description
AR Part Number
The Instrument
00620L
Probe Cable (Qty 2)
02100A-13
High Current Input LINE Cable
38841
High Current Input NEUTRAL Cable
38842
High Current Output LINE Cable
38833
High Current Output NEUTRAL Cable
38834
High Current GND Cable Red
CBLHC40-10TLR
Fuse 2A 250V Slow Blow 20mm
37923
USB Cable AB-Type 1.8m
39066
Line Cord Standard *
33189
Adapter Box *
38777
Interlock Connector
38705
Bracket Rack Mount 3U (Qty 2)
38788
Handle Rack Mount 3U (Qty 2)
38787
Screw M4 x 12mm FHMS (Qty 4) for Rack
Mount Handle
38549
Only accessories which meet the manufacturer’s specification
shall be used.

11
Note: The Adapter Box (universal US polarity) and line cord listed are
American. Other combinations of line cord and Adapter Box are available upon
request.
2.2. Installation
2.2.1. Work Area
Locate a suitable testing area and be sure you have read all
safety instructions for the operation of the instrument and
suggestions on the test area setup in section 1.4. Safety.
Make sure the work area you choose has a three-prong grounded outlet capable of
supplying the necessary input current to the power source. Be sure the outlet has
been tested for proper wiring before connecting the instrument to it.
The mains plug is used as the disconnecting device and shall
remain readily operable. The socket-outlet shall be installed.
Near the equipment and shall be easily accessible.
2.2.2. Power Requirements
This instrument requires a power source of either 115 volts AC ± 10%, 50/60 Hz
single phase or 230 volts AC ±10%, 50/60 Hz single phase. Before applying power
verify that the instrument is set to the correct line voltage (115 or 230 volts). Adjust
the voltage select switch to 115 for use with a 115 volt input. Adjust the voltage select

12
switch to 230 for use with a 230 volt input. See section 3.2.2. Rear Panel Controls
for an image of the rear panel.
Do not replace the power supply cord with an improperly rated
cord. For North American: A UL listed and CSA labeled power
cord must be used with the instrument in the United States and
Canada. The power cord must include a NEMA5-15 style male plug, SVT or SJT cord
sets, and be rated for at least 125VAC, 10A, number 16 gauge (or 125VAC, 15A,
number 14 gauge) wire or larger, and the length of the cord does not exceed 2 m must
be used. For European: A certified power supply cord not lighter than light PVC
sheathed flexible cord according to IEC 60227, designation H03 VV-F or
H03 VVH2-F (for equipment mass not exceeding 3 kg), or H05 VV-F or H05 VVH2-F2
(for equipment mass exceeding 3 kg), and be rated for at least 3G 0.75 mm² (for rated
current up to 10 A) or 3G 1.0mm² (for rated current over 10 A up to 16 A) wire or
larger, and the length of the cord does not exceed 2 m must be used.
Do not switch the line voltage selector switch located on the
rear panel while the instrument is on or operating. This may
cause internal damage and represents a safety risk to the
operator.
The 620L must be connected to a good ground. Be certain that
the power wiring is properly polarized and that the proper low
resistance bonding to ground is in place.
2.2.3. Basic Connections
Power Cable
The instrument is shipped with a line cord containing a protective earth ground. When
the line cord is connected to an appropriate AC power source the cable will connect
the chassis to earth ground.
The main plug shall only be inserted in a socket outlet with a
protective ground (earth) contact. This protective ground must
not be defeated by the use of an extension cord without a
protective conductor.
Return Connection
When the instrument’s return is grounded, any internal and external stray leakage will
be monitored due to currents that flow from high voltage to earth ground (such as from
high voltage to the chassis of the instrument). These currents are inherent and will
cause errors when trying to monitor very low leakage currents in the micoamp range.

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The output power supplies of this instrument are referenced directly to earth ground.
Any conductor that completes a path between the high voltage and earth ground will
form a completed circuit.
2.2.4. Environmental Conditions
This equipment is intended for indoor use only. The equipment has been evaluated
according to Installation Category II and Pollution Degree 2 as specified in IEC 664.
This instrument may be operated in environments with the following limits:
Temperature….................. 41° - 104° F (5° - 40°C)
Relative humidity…........... 0 – 80%
Altitude…......................... 6560 feet (2,000 meters)
Keep the ventilation slits uncovered during operation. Failure to
do so could cause the instrument to overheat and may damage
internal components.
Storage and Shipping Environment
This instrument may be stored or shipped in environments with the following limits:
Temperature….................. -40° - 167° F (-40° - 75°C)
Altitude…......................... 50,000 feet (15,240 meters)
The instrument should also be protected against temperature extremes that may
cause condensation within the instrument.
Failure to operate this instrument within the specified conditions
could result in damage.
If the instrument is used in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired.
More Information
For more information on test operator and workstation safety please visit the Events
and Training section of our website at http://www.asresearch.com/events-
training/Default.aspx

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3. SPECIFICATIONS AND CONTROLS
3.1. 620L Functional Specifications
INPUT
Voltage
115/230 VAC ± 10%, User selection
Frequency
50/60 Hz ± 5%
Fuse
2A Slow-Blo 250V AC
LINE CONDITION
Reverse Power Switch
Reverse polarity switch setting select ON/OFF/AUTO
ON: Reverse power
OFF: Normal
AUTO: Automatic Reverse Polarity. With AUTO mode,
the polarity switches for normal conditions in one step
setting menu but will run two steps for both conditions.
In this mode, the unit only records and displays the
maximum leakage current value.
Neutral Switch
ON/OFF selection for single fault condition
Ground Switch
ON/OFF selection for Class I single fault condition
PROBE SETTING
Surface to Surface (PH –PL)
Surface to Line (PH –L)
Ground to Line (G –L)
LEAKAGE LIMIT SETTING
Touch Current High Limit (RMS)
Range:
0.0uA ~ 999.9uA
1000uA ~ 9999uA
10.00mA ~ 20.00mA
Resolution:
0.1uA / 1uA / 0.01mA
Touch Current Low Limit (RMS)
Range:
0.0uA ~ 999.9uA
1000uA ~ 9999uA
10.00mA ~ 20.00mA
Resolution:
0.1uA/1uA/0.01mA
Touch Current High Limit (Peak)
Range:
0.0uA - 999.9uA
1000uA - 9999uA
10.00mA - 30.00mA
Resolution:
0.1uA/1uA/0.01mA
Touch Current Low Limit (Peak)
Range:
0.0uA - 999.9uA
1000uA - 9999uA
10.00mA - 30.00mA
Resolution:
0.1uA/1uA/0.01mA