CT238A - Measuring equipment Amprobe - Free user manual and instructions
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| Product type | Clamp meter |
| Brand | Amprobe |
| Model | CT238A |
| Dimensions (L x W x H) | 200 mm x 70 mm x 35 mm |
| Weight | 250 g (with battery) |
| Power supply | 9V battery (type 6LR61) |
| Display | Backlit LCD, 4000 counts |
| Alternating current (AC) | 400 A (accuracy ±2% + 5 digits) |
| Alternating voltage (AC) | 600 V (accuracy ±1% + 5 digits) |
| Direct voltage (DC) | 600 V (accuracy ±0.5% + 3 digits) |
| Resistance | 400 Ω (accuracy ±1% + 5 digits) |
| Continuity test | Yes, with built-in buzzer (< 50 Ω) |
| Diode test | Yes, forward voltage |
| Frequency | Yes, up to 10 kHz |
| Electrical safety | CAT III 600 V |
| Jaw opening | 30 mm max |
| Maintenance and cleaning | Clean with a soft, dry cloth. Do not use solvents. |
| Spare parts and repairability | Not user-serviceable. Contact Amprobe customer service. |
| Warranty | 1 year (parts and labor) |
| Supplied accessories | Clamp meter, 9V battery, test leads, user manual |
| Certifications | CE, RoHS |
Frequently Asked Questions - CT238A Amprobe
How to turn the CT238A on and off?
Press the ON/OFF button (usually located on the side or top of the device) to turn on. Hold for 2 seconds to turn off.
How to select the measurement mode?
Turn the rotary dial to select the desired function: AC current (A~), AC voltage (V~), DC voltage (V---), resistance (Ω), or diode/continuity test.
What does 'OL' on the display mean?
'OL' means Over Limit. It indicates that the measured value exceeds the selected range. Switch to a higher range or reduce the value being measured.
How to replace the battery of the CT238A?
Turn off the device and remove the test leads. Open the battery compartment on the back (Phillips screw). Replace with a new 9V battery respecting polarity. Close carefully.
Can I measure voltages above 600 V?
No, the safety category is CAT III 600 V. Never exceed 600 V relative to earth, risk of electric shock or damage to the device.
How to perform a continuity test?
Select the 'Ω' position with the diode/continuity symbol (usually a diode and a speaker). Connect the test leads to the COM and VΩ terminals. Touch the test probes between two points in the circuit. A beep indicates continuity (resistance < 50 Ω).
The device no longer turns on, what to do?
First check the battery: it may be discharged or incorrectly installed. Replace if necessary. If the problem persists, contact Amprobe customer service.
How to measure current with the clamp?
Ensure the conductor is insulated. Open the clamp and place a single conductor in the center of the jaw. Close the clamp. Select AC current mode (A~) and read the value.
Is the CT238A suitable for industrial use?
Yes, with its CAT III 600 V certification, it is suitable for measurements on lighting circuits, industrial sockets, and secondary electrical panels.
How to clean the housing?
Use a slightly damp soft cloth (soapy water) to wipe the housing. Do not use alcohol, solvents, or abrasive products. Dry thoroughly before storing.
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USER MANUAL CT238A Amprobe
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Product information
Brand : Amprobe
Model : CT238A
Category : Measuring equipment