DM 3 1/2 and 4 1/2 Digital Voltage Amperage Meter Frequency meter Tachometer Count meter, high accuracy, widely used in industrial
1. Features and advantages:
a). Classical hareware design,stable performance.
 b). High accuracy.
 c). Rich measuring range available.
 d). With decimal point setting function.
2. Model specification:

3. Technical parameter:
1). DC DIGITAL VOLTMETER,AMMETER
Electrical parameter:
| Max.display | 1999 (3 1/2); 19999 (4 1/2 ) | 
| Input mode | Single ended input | 
| A/D converter | Dual integral | 
| Sampling rate | About 2.5 times/second | 
| Overflow indication | 3 1/2:“-1”or“1”; 4 1/2:“0000”or“-0000”LED flash | 
| Polarity display | Only “-”display | 
| Display | Red LED | 
| Power supply | 3 1/2:DC 5V ±10%; 4 1/2:DC 5V ±0.2V | 
| Working invironment | 0~50℃ <85%RH | 
 Measuring range and specification:
◆ DC digital voltmeter:
| Model | Range | Resolution | Input Impedance | Measuring Accuracy | Input protecting | 
| DM3 □-DV0.2 | 199.9mV | 100uV | 5MΩ | ±0.5%F.S ±2Digits | 5V | 
| DM3 □-DV2 | 1.999V | 1mV | 5MΩ | ±0.5%F.S ±2Digits | 5V | 
| DM3 □-DV20 | 19.99V | 10mV | 2MΩ | ±0.5%F.S ±2Digits | 24V | 
| DM3 □-DV200 | 199.9V | 100mV | 2MΩ | ±0.5%F.S ±2Digits | 240V | 
| DM3 □-DV600 | 600V | 1V | 2MΩ | ±1%F.S ±2Digits | 720V | 
| DM4C-DV2 | 1.9999V | 100uV | 2MΩ | ±0.2%F.S ±2Digits | 5V | 
| DM4C-DV20 | 19.999V | 1mV | 2MΩ | ±0.2%F.S ±2Digits | 24V | 
| DM4C-DV200 | 199.99V | 10mV | 2MΩ | ±0.2%F.S ±2Digits | 240V | 
◆ DC digital ammeter:
| Model | Range | Resolution | Input Impedance | Measuring Accuracy | Input protecting | 
| DM3 □-DA0.0002 | 199.9uA | 0.1uA | 10KΩ | ±0.5%F.S ±2Digits | 0.5mA | 
| DM3 □-DA0.002 | 1.999mA | 1uA | 1000Ω | ±0.5%F.S ±2Digits | 5mA | 
| DM3 □-DA0.02 | 19.99mA | 10uA | 10Ω | ±0.5%F.S ±2Digits | 50mA | 
| DM3 □-DA0.2 | 199.9mA | 1mA | 1Ω | ±0.5%F.S ±2Digits | 500mA | 
| DM3 □-DA2 | 1.999A | 1mA | 0.1Ω | ±0.5%F.S ±2Digits | 3A | 
| DM4C-DA20 | 19.999A | 1mA | 5MΩ | ±0.2%F.S ±2Digits | 100mV | 
| DM4C-DA200 | 199.99A | 10mA | 5MΩ | ±0.2%F.S ±2Digits | 100mV | 
2). FREQUENCY,TACHOMETER,COUNTER DIGITAL PANEL METER
Electrical parameter:
| Display | Red LED | 
| Input impedance | >10K | 
| Input electrical lever | 5~25V | 
| Input waves | Square wave | 
| Voltage input limit | 25V | 
| Frequency accuracy | ±0.05 ±1Digit(DM4A-FR1;DM4B-FR1); ±0.05 ±10Digits(DM5C-FR1)  |  		
| Input frequency range | 1~10K HZ | 
| Counting speed | ≤1000CPS | 
| Decimal point | Auto change according to the setting range | 
| Overflow indication | “UUUU”or“UUUUU” | 
| Power supply | DC +5V±10 %(DC 12V or DC 24V can be ordered) | 
| Working invironment | 0~50℃ <85%RH | 
Measuring range and specification:
| Model | Frequency range | Rotary speed range | Counter range | Range conversion | 
| DM4A-FR1 | 1-9999HZ | 60-9999Rpm | 0-9999 | Auto | 
| DM4B-FR1 | 1-9999HZ | 60-9999Rpm | 0-9999 | Auto | 
| DM5C-FR1 | 1-9999HZ | 60-99999Rpm | 0-99999 | Auto | 
4. Appearance and installation dimensions:

5. Connections:

6. Contact:
Sales: bassy shi
Cell phone: +86 13773069136
Email: bassy.shi@youjiazhineng.com