CT2700User Manual

800-572-1028 caltestelectronics.com 1

Safety SummaryTo avoid personal injury and/or product damage, review and comply with the following safety precautions. These precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this probe.

A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.

A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of parts or the entire product.

Do Not Work AloneDo not work alone when working with high voltages.

Inspect the ProbeInspect the probe and accessories for cracks and frayed or broken leads before each use. If defects or damages are noted, DO NOT USE the probe.

Dry ConditionsHands, shoes, floor and work bench must be dry. Avoid making measurements under humidity, dampness or other environmental conditions that might affect safety.

Do Not Remove the Probe CasingRemoval of the probe’s casing may expose you to electric shock. If necessary, disconnect the inputs and outputs of the probe before opening the case.

Hazardous ContactTo avoid injury, remove jewelry such as rings, watches, and other metallic objects. Do not touch exposed connections and components when power is present.

Unexpected ChargesHazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit exists. Capacitors

800-572-1028 caltestelectronics.com 2

inside the instrument may retain a charge even if the instrument is disconnected from its source of supply.

Not for Critical Applications This probe is not authorized for use in contact with the human body or for use as a component in a life-support device or system.

Do Not Substitute PartsDo not install substitute parts or perform any unauthorized modification to the instrument.

Only Qualified PersonnelOnly qualified personnel should use this probe. This differential voltage probe is designed to be used by personnel who are trained, experienced, or otherwise qualified to recognize hazardous situations and who are trained in the safety precautions necessary to avoid possible injury when using such a device.

Observe Maximum Working VoltageDo not apply to the input any potential that exceeds the maximum voltage rating of the probe. See Electrical Specifications, page 8.

Use Proper Power SourceDo not operate this probe from a power source that applies more than the voltage specified.

Must be GroundedAlways properly ground the probe with the probe’s ground lead alligator clip before contacting high voltage circuits with the probe tip. Always disconnect the probe tip from high voltage circuits before disconnecting the ground lead. Do not connect the probe ground lead to any point which is at a potential other than earth ground. Use only on test equipment where the chassis or return lead is properly grounded.

CAT I Usage OnlyThis probe is intended for use in measurement Category I (CAT I). Dot not use for measurements on mains circuits. This probe is not intended for usage within Measurement Categories II, III, & IV.

Finger GuardKeep fingers behind the probe’s finger guard during use.

800-572-1028 caltestelectronics.com 3

Connecting and Disconnecting from High VoltageTurn the high voltage source off before connecting or disconnecting the probe whenever possible.

Keep the Probe CleanThe probe body should be kept clean and free of any conductive contamination.

Use Only in Offi ce-Type Indoor SettingThe probe is designed to be used in offi ce-type indoor environments of Pollution Degree 2. Do not operate the probe:

z In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-divided particulates.

z In environments where there is a danger of any liquid being spilled on the probe.

z In air temperatures exceeding the specified operating temperatures.

z In atmospheric pressures outside the specified altitude limits or where the surrounding gas is not air.

Measurements May Be CompromisedMeasurements made by this probe may be outside specifi cations if the probe is used in non-offi ce-type environments. Such environments may include rapid temperature or humidity changes, sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise, strong electric fi elds, or strong magnetic fi elds.

800-572-1028 caltestelectronics.com 4

Compliance StatementsDisposal of Old Electrical & Electronic Equipment(Applicable in the European Union and other European countries with separate collection systems). This product is subject to Directive 2012/19/EU of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.

This probe is in compliance with IEC-61010-031 CAT I, Pollution Degree 2.

800-572-1028 caltestelectronics.com 5

IEC Category RatingThe IEC 61010 standard defines safety category ratings that specify the amount of electrical energy available and the voltage impulses that may occur on electrical conductors associated with these category ratings. The category rating is a Roman numeral of I, II, III, or IV. This rating is also accompanied by a maximum voltage of the circuit to be tested, which defines the voltage impulses expected and required insulation clearances. These categories are:

Category I

(CAT I)

Measurement instruments whose measurement inputs are not intended to be connected to the mains supply. The voltages in the environment are typically derived from a limited-energy transformer or a battery.

Category II

(CAT II)

Measurement instruments whose measurement inputs are meant to be connected to the mains supply at a standard wall outlet or similar sources. Example measurement environments are portable tools and household appliances.

Category III

(CAT III)

Measurement instruments whose measurement inputs are meant to be connected to the mains installation of a building. Examples are measurements inside a building’s circuit breaker panel or the wiring of permanently-installed motors.

Category IV

(CAT IV)

Measurement instruments whose measurement inputs are meant to be connected to the primary power entering a building or other outdoor wiring.

800-572-1028 caltestelectronics.com 6

1 Introduction

1.1 Product OverviewThe Cal Test CT2700 is a 40 kV High Voltage divider probe for use with analog or digital multimeters.

1.2 Features z Measures up to: 40 kV (DC+Peak AC) or 28 kVrms AC. z Voltage dividing of 1000:1 z Retractable sleeve 4 mm banana plugs

1.3 Initial InspectionThis probe is tested prior to shipment. It is therefore ready for immediate use upon receipt. An initial physical inspection should be made to ensure that no damage has been sustained during shipment. After the inspection, verify the contents of the shipment. The kit contains:

z CT2700 high voltage probe z User manual z Standard probe tip z Hands-free hook probe tip z Bolt-on probe tip

2 Using the Probe1. Connect the red banana plug to the volts terminal and the

black banana plug to the COM terminal of your multimeter.

WARNINGConnect the CT2700’s common lead (alligator clip) to earth ground or reliable chassis ground before use. This ground connection is critical to the safe operation of the probe. This connection must always be made BEFORE the probe tip comes into contact with the high voltage and must not be removed until after the probe tip has been removed from the high voltage source.

800-572-1028 caltestelectronics.com 7

2. Select the voltage range. Do not use autoranging.3. Whenever possible, turn the high voltage source off before

making any connections.4. Before turning on the high voltage source, be certain the

operator is not touching the device under test. 5. Turn on the high voltage source.6. You can now analyze the voltage on your multimeter.7. Turn off the high voltage source.8. Disconnect the probe from the high voltage source BEFORE

disconnecting the ground clip lead.

3 CleaningClean only the exterior probe body and cables. Use a soft cotton cloth lightly moistened with a mild solution of detergent and water.

WARNINGDo not allow any portion of the probe to be submerged at any time.

WARNINGDry the probe thoroughly before attempting to make voltage measurements.

CAUTION Do not subject the probe to solvents or solvent fumes as these can cause deterioration of the probe body and cables.

800-572-1028 caltestelectronics.com 8

4 SpecificationsAll specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 25 °C ± 5 °C.

Electrical SpecificationsMaximum Input Voltage (CAT I) 40 kV (DC+Peak AC)

28 kVrms AC

Division Ratio 1000:1

Bandwidth 300 Hz (-3 dB)

Temperature Coefficient ≤200 ppm/ºC

Input Resistance 1000 MΩ

DC Volts Accuracy ±1% (<20 kV) ±3% (20 kV to 40 kV)

≤0.5% (with 10 MΩ input impedance DMM only)

AC Volts Accuracy 5% at 60 Hz (1 to 28 kV)

Maximum Loading Current ≤40 µA (at 40 kV DC)

Maximum Loading Power ≤1.6 W

Source Impedance 10 MΩ

Mechanical CharacteristicsDimensions (Lenth x Diameter) 340 x 80 mm

Cable Length 3.3 ft (1 m)

Weight 0.66 lbs (300 g)

Environmental CharacteristicsDesigned for Use in Pollution Degree 2

Operating Environment 32ºF to 122ºF (0ºC to 50ºC)

Storage Temperature -4ºF to 158ºF (-20ºC to 70ºC)

Humidity ≤80% relative humidity at 104ºF (40ºC)

Safety SpecificationsIEC 61010-031 CAT I

Specifications are subject to change without notice. To ensure the most current version of this manual, please download the current version from our website: caltestelectronics.com.

800-572-1028 caltestelectronics.com 9

5 Service & Warranty Information

5.1 Limited One-Year WarrantyCal Test Electronics warrants this product to be free from defective material or workmanship for a period of 1 year from the date of original purchase. Under this warranty, Cal Test Electronics is limited to repairing the defective device when returned to the factory, shipping charges prepaid, within the warranty period.

Units returned to Cal Test Electronics that have been subject to abuse, misuse, damage or accident, or have been connected, installed or adjusted contrary to the instructions furnished by Cal Test Electronics, or that have been repaired by unauthorized persons, will not be covered by this warranty.

Cal Test Electronics reserves the right to discontinue models, change specifications, price, or design of this device at any time without notice and without incurring any obligation whatsoever.

The purchaser agrees to assume all liabilities for any damages and/or bodily injury which may result from the use or misuse of this device by the purchaser, his employees, or agents.

This warranty is in lieu of all other representations or warranties expressed or implied and no agent or representative of Cal Test Electronics is authorized to assume any other obligation in connection with the sale and purchase of this device.

5.2 ServiceIf you have a need for calibration or repair services, technical or sales support, please contact us:

22820 Savi Ranch ParkwayYorba Linda, CA 92887

800-572-1028 or 714-221-9330caltestelectronics.com

800-572-1028 caltestelectronics.com 10

© 2016 Cal Test Electronics450855-001 20170110