Model 1600A High Voltage Probe
Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
http://www.keithley.com
Safety and Characteristic Information
PA-148 Rev. B / November 2014 *PPA148B* 1
This high voltage probe is designed to preve nt accidental s hock to the operator when p roperly
used. This operating note must be rea d and fully understood prior to using the probe.
Model 1600A High Voltage Probe Safety and Characteristic Information
Characteristics
Input resistance approximately 1000 MΩ
Division ratio 1000:1
Maximum working voltage 40 kV DC or 28 kV AC 50/60 Hz
Accuracy DC volts: ±1% (1 kV to 20 kV), ±2% (20 kV to 40 kV)
AC volts: Typically 5% at 50/60 Hz
Temperature coefficient Less than 200 ppm / ºC
Operating temperature 0 ºC to +50 ºC
Storage temperature -20 ºC to -70 ºC
Cable length 1 meter
Safety note:
This high voltage probe must only be used by personnel who are trained, experienced, or otherwise
qualified to recognize hazardous situations and who are trained in the safety precautions that are
necessary to avoid possible injury when using such a device.
Do not work alone when working with high voltage circuits.
For your own safety, inspect the probes for cracks and frayed or broken leads before each use. If defects
are noted, DO NOT use the probe.
Hands, shoes, floor, and work bench must be dry. Avoid making measurements under humid, damp, or
other environmental conditions that might affect the safety of the measurement situation.
If possible, always turn the high voltage source off before connecting or disconnecting the probe.
The probe body should be kept clean and free of any conductive contamination.
Operation
1. Connect the plugs to the volts (HI) and corn (LO) input terminals of your voltmeter.
2. Select the desired voltmeter function and range: do not use autoranging.
3. Whenever possible, turn the high voltage source off before making any connections.
4. Connect the divider probe common lead (alligator clip) to a good earth ground or reliable chassis ground
Do not attempt to take measurements from sources where the chassis or returm lead is not
grounded.
This ground connection is critical to the safe operation of the probe. Failure to make this
connection when making high volta g e measurements may result in personal injury o r damage
to the probe or voltmeter. This co nnec tion mus t always be made BEFORE the probe ti p com es
into contact with the high voltage and must not be removed until after the probe tip has been
removed from the voltage source.
Do not connect the ground clip lead to the h igh voltage source or the probe tip to ground for
any reason.
2 PA-148 Rev. B / November 2014
Model 1600A High Voltage Probe Safety and Characteristic Information
Before turning the high voltage on, make sure that no part of your body is in contact with the
device under test.
5. Measure the voltage remembering that the voltage being measured is 1000 times greater then the
voltmeter reading.
6. Turn the high voltage off.
7. Disconnect the probe tip from the high voltage source BEFORE removing the ground clip lead
Cleaning
Clean only the exterior probe body and cables. Use a soft cotton cloth lightly moistened with a mild solution of
detergent and water. Do not allow any portion of the probe to submerge at any time.
Dry the probe thoroughly before attempting to make voltage measurement.
Do not subject the probe to solvent fumes as these can cause deterioration of the probe body and cables.
PA-148 Rev. B / November 2014 3
Safety precaut ions
The following safety precaut ions should be ob served before u sing this product and any associated in strumentation. A lthough some
instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid pos sible injur y. Read a nd follow all install ation, oper ation, an d maintena nce inform ation carefu lly befor e using the
product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to w ork on live circuits, perform safe in stallations, an d repair produ cts. Only proper ly trained serv ice
personnel may perform installation and service procedures.
Keithley Instruments produ cts are designed for use with elect rical signals tha t are measurement, control, and da ta I/O connection s,
with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for hig h transi ent
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instru ment to mains.
Exercise extreme c aution w hen a s hock hazard is pres ent. L ethal v olt age m ay be prese nt o n cabl e connect or ja cks or test f ix tures.
The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30 V RMS,
42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit
before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are
prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human
contact. Product operat ors in these circumstances must be trained to protect th emselves fro m the risk of ele ctric shock. I f the circuit
is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
Do not connect switching card s directly to unlimited power cir cuit s. T hey are inte nded to be used with impedance-limit ed s our ces .
NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to
limit fault current and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment w here acce ss to the main p ower cord is restr icted, su ch as rack moun ting, a separat e main inp ut power
disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the pro duct, test c ables, or any other instr uments while pow er is applied to the circuit un der test.
ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or
jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any ob ject that could provide a current path to the common side of the cir cuit under test or power line (earth) ground.
Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being
measured.
For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
If you are using a tes t fix ture, keep the li d clo sed w hile power is applied to the d evice under t est. Saf e op eration requ ires the use of
a lid interlock.
If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of danger. The user must refer to the operating instructions located in the
user documentation in all cases where the symbol is mark ed on the instru ment .
The symbol on an instrument means caution, risk of electric sho ck. Use standard safety pre cautions to avoid p ersonal cont act
with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.
The WARNING heading in the user d ocu me ntation explains dangers that m ight r es ult i n pe r sonal in jur y or de ath. A lways read the
associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains h az ards that coul d dama ge the instr ume nt. Such dam age may
invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from e lectric shock and fire, replace m ent co mpo nent s in mai ns circ u it s — including the power trans former,
test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. Other components that are not safety-related may be purch ased from
other suppliers as long as t hey are equivalen t to the original c omponent (note t hat selected p arts should be purc hased only t hrough
Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the applicability of a
replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no
case or chassis (e.g., a data acquis ition board for in stallation i nto a computer ) should never r equire cleaning if handled a ccording to
instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper
cleaning/servicing.
Safety precaution revision as of January 2013.
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