The CEM DT-987H is a high – performance True – RMS Digital Multimeter, engineered to meet the diverse needs of professionals in the electrical and electronics fields.
Key Features
1. Accurate True – RMS Measurement
This multimeter is designed to precisely measure the true root mean square (RMS) value of alternating current (AC) voltage or current. Even when dealing with distorted waveforms, which are common in non – ideal power supplies, it can provide accurate readings. This makes it an essential tool for working in industrial environments, power grids, and electronic equipment testing.
2. Large and Clear Display
Featuring a large 60,000/6000 – count LCD display with an analog bargraph and backlight, the DT – 987A offers clear and easy – to – read measurements. The analog bargraph provides a quick visual indication of the measured value’s magnitude, while the backlight ensures visibility in low – light conditions.
3. Wide Bandwidth
With a 10kHz bandwidth for voltage and current measurements, it can effectively measure signals within this frequency range, making it suitable for a variety of electrical applications, from basic electrical circuit testing to more complex electronic device debugging.
4. Low – Pass Filter
Equipped with a low – pass filter (VFD), the multimeter can reduce high – frequency noise in the measured signals. This is particularly useful when measuring signals in environments with electrical interference, ensuring more stable and reliable measurement results.
5. Fast Sampling and Transient Capture
The A/D convert has a fast sampling time, and it also features a peak capture function that can record transients as fast as 500μs. This allows users to capture and analyze short – term voltage or current spikes, which are crucial for detecting and diagnosing potential electrical problems.
6. Min/Max/Average with Time Stamp
The DT – 987H can record the minimum, maximum, and average values of a signal along with a time stamp. This function is handy for monitoring signal fluctuations over time, helping technicians and engineers identify trends and anomalies in electrical signals.
Specifications | |||||||
Function | Maximum | Max, resolution | Basic Accuracy | 985 | 987A | 987BT | 987H |
Voltage DC | 1000V | 10mV | ±(0.9% + 5) | * | * | * | |
100mV | * | * | * | * | |||
Voltage AC | 1000V | 10mV | ±(1.0% + 5) | * | * | * | |
100mV | * | * | * | * | |||
Current DC | 10A | 0.01μA | ±(1.5% + 5) | * | * | * | |
0.1μA | * | * | * | * | |||
Current AC | 10A | 0.01μA | ±(2.5% + 5) | * | * | * | |
0.1μA | * | * | * | * | |||
Resistance | 60MΩ | 10 mΩ | ±(1.2% + 5) | * | * | * | |
100 mΩ | * | * | * | * | |||
Temperature | 760ºC/1400ºF | 0.1ºC/ºF | ±(2.0% + 3º) | * | * | * | * |
Capacitance | 10mF | 0.01nF | ±(2.5% + 5) | * | * | * | * |
Frequency | 10MHz | 0.01Hz | ±(1.0% + 2) | * | * | * | * |
Diode and Continuity | Yes | ||||||
Power Supply | 1.5Vx4 “AAA” batteries. |
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