TB 28 - Measuring equipment Testboy - Free user manual and instructions
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| Product Type | Digital Multimeter |
| Brand | Testboy |
| Model | TB 28 |
| Category | Measuring Equipment |
| Dimensions (approx.) | 150 x 70 x 30 mm (5.9 x 2.8 x 1.2 in) |
| Weight (approx.) | 200 g (7.1 oz) |
| Power Supply | 9V block battery (6F22 or equivalent) |
| Display | LCD, 3 1/2 digits (max 1999) |
| DC Voltage Range | 200 mV - 600 V |
| AC Voltage Range | 200 V - 600 V |
| DC Current Range | 200 µA - 10 A |
| Resistance Range | 200 Ω - 2 MΩ |
| Additional Functions | Diode test, continuity buzzer, transistor test (hFE), battery test |
| Safety Category | CAT II 600V |
| Maintenance & Cleaning | Wipe with a dry cloth; do not use solvents. Replace battery when low. |
| Spare Parts / Repairability | Test leads, battery, fuses (if internal). Refer to manual for service. |
| Included Accessories | Test leads, 9V battery, manual (PDF) |
| Manual Languages | DE, EN, PT, RU (available) |
Frequently Asked Questions - TB 28 Testboy
How do I measure DC voltage with the Testboy TB 28?
Set the rotary switch to the V (DC) position. Connect the black lead to COM and red lead to V/Ω. Touch the probes to the circuit. Read the display.
What does 'OL' on the display mean?
OL stands for Overload. The measured value exceeds the selected range. Switch to a higher range.
How do I test continuity with the TB 28?
Turn the dial to the continuity symbol (usually a diode or sound wave). Connect probes as for resistance. A beep indicates continuity (typically < 30 Ω).
What battery does the TB 28 use?
The TB 28 uses a standard 9V block battery (6F22). Replace when the battery indicator appears.
How do I replace the battery?
Remove the screw on the back cover, lift off the cover, replace the 9V battery, and close the cover securely.
Can I measure AC current with the TB 28?
Yes, but only up to 10 A. Set to AC A range, connect leads in series with the load. Note: For high current, limit measurement time.
What is the maximum voltage the TB 28 can measure?
The maximum DC voltage is 600 V, and AC voltage is 600 V (CAT II). Do not exceed these limits.
How do I measure resistance?
Set the dial to Ω, connect leads across the resistor. Ensure the circuit is de-energized. Read the value on the LCD.
Is the TB 28 suitable for automotive diagnostics?
It can measure basic parameters like voltage, resistance, and continuity. For advanced automotive tests, a dedicated tool may be needed.
Where can I download the manual?
The manual in PDF format is available on notice-facile.com for the Testboy TB 28.
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Product information
Brand : Testboy
Model : TB 28
Category : Measuring equipment