Cal Test CT3681 User Manual

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CT3681 & CT3683

User Manual

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Summary of Contents for Cal Test CT3681

Page 1 CT3681 & CT3683 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 CT3681 or CT3683 probe above 5000 Vrms CAT I (1000x attenuation) or 500 Vrms CAT I (100x attenuation) between the two input leads. Do not use the probes above 5000 Vrms CAT I (both 100x and 1000x attenuation settings) between each input lead and earth.
Page 4: Compliance Statements
Use Proper Power Source To ensure this probe function well, use four AA cells or 6VDC/200mA or regulated 9VDC/120mA mains adapter or power leads. Do not operate this probe from a power source that applies more than the 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.
Page 5: Initial Inspection
Differential probes allow safe, accurate measurement between two voltage points where neither point is referenced to ground. The CT3681 and CT3683 both offer a 70 MHz bandwidth and can test up to ±7 kV (DC + AC peak). Compatible with oscilloscopes from all major...
Page 6: Product Description
2.1 Front Panel CT3681 Output BNC cable, 90 cm, Power On/Off Switch with 4 mm Banana Plug Ground Lead Over-range Indicator Off set Adjustment Hook Probes Attenuation Function Switch Leads, LED Power Indicator 60 cm Figure 1 Front Panel Diagram CT3681 caltestelectronics.com 800-572-1028...
Page 7 2.2 Front Panel CT3683 Output BNC cable, 90 cm, Power On/Off Switch with 4 mm Banana Plug Ground Lead Over-range Indicator High Voltage Hook Probes Offset Adjustment Attenuation Function Switch LED Power Indicator High Voltage Input Leads Figure 2 Front Panel Diagram CT3683 caltestelectronics.com 800-572-1028...
Page 8: 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 9: Getting Started
The actual vertical scale of the oscilloscope is equal to the attenuation factor multiplied by the range of vertical scale selected on the oscilloscope. For example, with the CT3681 set on attenuation 100x, the oscilloscope on 0.5 V/div, the real vertical scale is 100 x 0.5 = 50 V/ div.
Page 10 1000 V/div Table 1 Oscilloscope Readings Offset Zero Procedure The CT3681 and CT3683 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 11: 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 CT3681 & CT3683 Bandwidth (-3dB) 70 MHz (driving 1 MΩ oscilloscope input) Rise Time (10%-90%)
Page 12: Mechanical Characteristics
Dimensions 202 x 83 x 38 mm BNC Cable Length 90 cm Input Leads Length 60 cm each CT3681 Probes 1000 V, CAT III, 20 A CT3683 Probes 7000 V, CAT I, 2 A Environmental Characteristics Operating Temp/Humidity -10°C to 40°C / 25% to 85% RH Storage Temp/Humidity -30°C to 70°C / 25% to 85% RH...
Page 13: Voltage Derating Curve
5 Voltage Derating Curve The derating curve of the absolute maximum input voltage in common mode is show as follows: CT3681 & CT3683 Maximum Input Voltage Derating Curve 10,000 5000 5000 2500 1,000 Frequency (Hz) Figure 3 Derating Curve caltestelectronics.com...
Page 14: 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 15 caltestelectronics.com 800-572-1028...

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Ct3683