Cal Test CT3686 User Manual

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CT3686 & CT3687

User Manual

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Summary of Contents for Cal Test CT3686

Page 1 CT3686 & CT3687 User Manual...
Page 2: Safety Summary
Safety Summary To 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. WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in...
Page 3 Observe Maximum Working Voltage Do not use the CT3686 or CT3687 probes above their maximum working volatage ranges. See “Electrical Specifications” on page 10. Use Proper Power Source To ensure this probe functions well, use four AA cells or 6 VDC/200 mA or regulated 9 VDC/120 mA mains adapter or power leads.
Page 4: Compliance Statements
voltage specifi ed. Must be Grounded This probe is grounded by the shell of the BNC connector through the grounding conductor of the power cord of the measurement instrument. Before making connections to the input leads of this probe, ensure that the output BNC connector is attached to the BNC connector of the measurement instrument, and that the measurement instrument is properly grounded.
Page 5 Differential probes allow safe, accurate measurement between two voltage points where neither point is referenced to ground. The CT3686 and CT3687 both offer 100 MHz bandwidth and can test up to ±700 V (DC + AC peak) and ±1400 V (DC + AC peak), respectively.
Page 6: Initial Inspection
1.2 Initial Inspection This 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: Differential probe (2) Hook probes, black &...
Page 7: Using The Probe
3 Using the Probe 3.1 Replacing the Batteries Before using the differential probe for the first time, the batteries supplied with the device must be inserted in the battery compartment (unless you are using the power adapter or USB power lead). WARNING At the time of inserting or replacing the batteries, the input leads must not be connected to an item to be tested.
Page 8: Getting Started
3.3 Getting Started Connect the hook probes to the leads. Connect the probe to the oscilloscope with the BNC cable. When using a portable or ungrounded oscilloscope, connect the output ground lead to ground. Switch the probe “ON.” Switch to the desired attenuation ratio. Use the hook probes to contact the circuit to be tested.
Page 9 100 V/div Table 1 Oscilloscope Readings Offset Zero Procedure The CT3686 and CT3687 can be adjusted to zero the probe’s offset voltage using the offset adjustment tool supplied with the probe. Follow this procedure to perform the offset adjustment. Connect the probe to Channel 1 of the oscilloscope. Turn on the probe power.
Page 10 instrument and the probe turned on for 30 minutes to stabilize. Press [Default Setup] and [Auto] on the oscilloscope. Press the Channel 1 button, then press the Probe softkey and set the attenuation to match that of the probe. Set the oscilloscpe to DC coupled mode and the scope offset to 0 volts.
Page 11: Electrical Specifications
Specifications All specifications apply to the unit after a temperature stabilization time of 20 minutes over an ambient temperature range of 25 °C ± 5 °C. Electrical Specifications CT3686 CT3687 Bandwidth (-3dB) 100 MHz (driving 1 MΩ oscilloscope input) Rise Time (10%-90%) 3.5 ns...
Page 12: Environmental Characteristics
5 Voltage Derating Curve The derating curve of the absolute maximum input voltage in common mode is show as follows: CT3686 & CT3687 Maximum Input Voltage Derating Curve 10,000 1000 1000...
Page 13: Service And Warranty Information
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.
Page 14 caltestelectronics.com 800-572-1028...
Page 15 caltestelectronics.com 800-572-1028...

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Ct3687