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Summary of Contents for Cal Test Electronics CT4028
- Page 1 CT4028 User Manual...
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Page 2: Safety Summary
Safety Summary WARNING CAUTION 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 instrument. Only qualified personnel should use this probe. - Page 3 Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit exists. Do not substitute parts that are not approved by Cal Test Electronics or modify this instrument. Return the instrument to Cal Test Electronics caltestelectronics.com...
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Page 4: Compliance Statements
for service and repair to ensure that safety and performance features are maintained. WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel. 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. - Page 5 1 Introduction Overview The Cal Test CT4028 is a 39 kV High Voltage divider probe for use with both digital and analog oscilloscopes. Features Measures up to: 39 kV (DC + ACpk) or 27 kVrms AC DC to 220 MHz bandwidth...
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Page 6: Using The Probe
Grounding Alligator Clip High Voltage Isolation Head (for use with ≥25 kV) Trimmer Tool Grounding Lead Extension Cable Frequency Compensation Trimmers BNC Cable Main Grounding Lead Hands-Free Bolt-On Probe Tip Standard Probe tip Hands-Free Hook Probe Tip 2 Using the Probe Connect the probe to the BNC input of the oscilloscope. -
Page 7: Frequency Compensation
test. Turn on the high voltage source. You will now be able to analyze the voltage waveform on your oscilloscope. WARNING Always attach the High-Voltage Isolation Head to the probe when working with voltages ≥25 kV. Gently turn the head clockwise to screw onto the tip of the probe. See Figure 2. Figure 2: High Voltage Isolation Head CAUTION Do not exceed 60 seconds of contact between the... - Page 8 200 Hz Adjustment Connect the probe to the oscilloscope. Apply a 200 Hz square wave to the probe tip and adjust the oscilloscope controls to display a few cycles of the waveform. Turn the 200 Hz Trimmer (Figure 3) using the Trimmer Tool, making a flat topped square wave (Figure 4).
- Page 9 Figure 4 shows how over- and under-compensated pulse responses will look. Figure 4: Over/Under Compensation Figure 5 shows a perfectly compensated probe. Figure 5: Good Compensation caltestelectronics.com 800-572-1028...
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Page 10: Specifications
4 Specifications All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 25 °C ± 5 °C. CT4026 Specifications Maximum Input Voltage 39 kV (DC + ACpk) (CAT I) 27 kVrms AC Maximum Loading 45 µA Current... -
Page 11: Voltage Derating Curve
5 Voltage Derating Curve WARNING When measuring higher frequency signals, be sure to comply with the Voltage vs Frequency Derating Curve. Figure 5: Voltage Derating Curve 6 Cleaning Clean only the exterior probe body and cables. Use a soft cotton cloth lightly moistened with a mild solution of detergent and water. -
Page 12: 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 13 NOTES caltestelectronics.com 800-572-1028...
- Page 14 NOTES caltestelectronics.com 800-572-1028...
- Page 15 NOTES caltestelectronics.com 800-572-1028...
- Page 16 450895-001 Rev. A © 2018 Cal Test Electronics...
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