| Parameter | TRM14 | TRM104 | TRM25 | 
        
            | Resistance Channels | Two | Two | Three | 
        
            | Temperature Channel | Not Available | Yes | 
        
            | Current Ranges | 1A, 0.1A, 0.01A | 10A, 1A, 0.1A, 0.01A | 25A, 10A, 5A, 1A, 0.1A, 0.01A | 
        
            | Maximum Resistance Range | 2000Ω | 2000Ω | 2000Ω | 
        
            | Best Resolution | 1μΩ | 1μΩ | 1μΩ | 
        
            | Accuracy | Value ± 0.5% ± 2 digits | 
        
            | O/C Voltage | 30V DC | 50V DC | 
        
            | Protection | Back EMF, Over Temperature, Accidental Disconnection of Lead | 
        
            | Discharge | Automatic | 
        
            | OLTC Discontinuity indication | Yes | 
        
            | Temperature Correction | No | Yes | 
        
            | Display | 4 Line 20 character backlit LCD for Resistance & Test Current | 256 X 128 pixel, backlit graphic LCD for Resistance & Test Current | 
        
            | Memory | No | 5000 results | 
        
            | Inbuilt Printer | No | Yes | 
        
            | PC Connectivity | No | Yes | 
        
            | Dimension | 475 x 405 x 175 mm | 475 x 405 x 230 mm | 585 x 480 x 195 mm | 
        
            | Instrument Weight | 10 kg | 15 kg | 20 kg | 
        
            | OLTC Dynamic Test | No | Yes (Optional) |