Hantek HT300B Passive Probes User Guide

Hantek HT300B Passive Probes

Specifications

• Probe Models: Hantek HT300B (300 MHz) and HT500B (500 MHz)
• Attenuation Ratio: 1:1 and 10:1 (switchable)
• Input Impedance : 1MΩ paralleled by 20pF (recalibratable for 15 to 40pF instruments)
• Compatibility : Hantek digital storage oscilloscopes or similar oscilloscopes with 1 Mohm BNC input

Product Usage Instructions

Handling and Maintenance

The probe cable is sensitive, avoid excessive bending or pulling. Do not use it if the red wear indicator is visible. Handle sharp accessories with care to prevent injury. Keep surfaces dry and clean.

Grounding and Connection

Use only Grounded instruments. Connect the probe to the oscilloscope and ground lead to earth ground before connecting to the circuit under test. Disconnect the probe input and ground lead before disconnecting from the circuit.

Safety Information

Operate indoors only, avoid wet/damp environments and explosive areas. Follow the safety and regulatory information provided.

Cleaning Instructions

If cleaning is needed, disconnect from the instrument and clean it with mild detergent and water. Ensure the probe is completely dry before reconnecting.

Adjusting Probes for Low-Frequency Compensation:

1. Connect the probe to the oscilloscope’s front-panel calibration
   output (square wave label).

2. Use the adjustment tool to optimize LF compensation for a square wave response.

FAQ:

• Q : What should I do if the red wear indicator on the probe cable is visible?
• A : Do not use the probe assembly if the red wear indicator is visible to prevent damage.
• Q: Can I recalibrate the probes for use with instruments having different input capacitance?
• A : Yes, the probes can be recalibrated for use with instruments having an input capacitance of 15 to 40.

CAUTION

The probe cable is a sensitive part of the probe and, therefore, you should be careful not to damage it through excessive bending or pulling. Avoid any mechanical shocks to the product to guarantee accurate performance and protection. Do not use the probe assembly if the red wear indicator in the cable has become visible

WARNING

• Some of the probe tips/accessories are very sharp. You should handle these with care to avoid personal injury.
• Use only Grounded instruments. Do not connect the probe’s ground lead to a potential other than Earth’s ground. Always make sure that the probe and oscilloscope are grounded properly
• Connect the probe to the oscilloscope and connect the ground lead to earth ground before connecting the probe to the circuit under test. Disconnect the probe input and the probe ground lead from the circuit under test before disconnecting the probe from the oscilloscope.
• Indoor Use Only. Do not operate in wet/damp environments. Keep product surfaces dry and clean
• Do not operate in an explosive environment

Safety and Regulatory Information

• The CE mark is a registered trademark of the European Community. ISM GRP 1-A denotes the instrument is an Industrial Scientific and Medical Group 1 Class A product. ICES/NMB-001 indicates product compliance with the Canadian
• This symbol indicates the Environmental Protection Use Period (EPUP) for the product’s toxic substances for the China RoHS requirementsInterference-Causing Equipment Standard
• CATII IEC Measurement category II is for measurements performed on circuits directly connected to the low voltage installation. Example. Household appliances portable tools, and similar equipment
• NOTE If your probe requires cleaning, disconnect it from the instrument and clean it with mild detergent and water. Make sure the probe is completely dry before connecting it to the instrument

The Hantek HT300B 300 MHz and HT500B 500 MHz passive probes are high-impedance probes with switchable attenuation ratio (1:1 and 10:1). These are compatible with hantek digital storage oscilloscopes or similar oscilloscopes with 1 Mohm BNC input

NOTE

The BNC connector of these probes has a pinhole without a pin. This is as per the design and does not indicate any damage or fault in the probe

Table 1 – Probe and its Supplied Accessories

These probes have been designed and calibrated for use with instruments having an input impedance of 1M Ω paralleled by 20pF. However, these may be recalibrated for use with instruments having an input capacitance of 15 to 40pF.

Adjusting Probes for Low-Frequency (LF) Compensation

The probe should be adjusted for LF compensation when it is connected to an oscilloscope input for the first time. LF compensation matches the probe cable capacitance to the oscilloscope input capacitance. This matching assures good amplitude accuracy from DC to the upper bandwidth limit frequencies. A poorly compensated probe influences the overall system performance (probe and oscilloscope) and introduces measurement errors resulting in inaccurate readings and distorted waveforms.

To perform LF compensation:

1.  Connect the probe to the oscilloscope’s front-panel calibration output (a square wave label is usually seen near this output).
2. Use the supplied adjustment tool to adjust the LF compensation to an optimum square wave response as shown in the figure below.

Table 2 – Electrical Characteristics

Table 3 – Physical & Environmental Characteristics

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