Hotline: 0904.754.399

Công ty TNHH Công nghệ ATP Việt Nam

Tiếng việtEnglish

Hướng dẫn lựa chọn máy ghi dữ liệu

1345
com_content.article
(0 votes, average 0 out of 5)
Hướng dẫn lựa chọn máy ghi dữ liệu0 out of 50 based on 0 voters.


Types of Recorders

Flatbed Recorders are designed for easy transportability. Use them on the benchtop to perform short-term monitoring. These recorders normally record less than five channels at a time and do not have spools or trays to collect recorded paper.

Modular Recorders offer the flexibility of using the same recorder for different types of inputs by simply changing the input module. Installing the module is easy—just slide it into the guide rails of the recorder.

Vertical Recorders feature multiple recording channels, wall-mount capabilities, and paper spools. Vertical recorders are ideal for long-term monitoring in industrial settings.

Circular Recorders allow you to record data on a single sheet of chart paper. Recorders typically record for a specific amount of time such as one hour, 24 hours, one day, or seven days.

Paperless Recorders represent the latest in data recording technology. View, analyze, and manipulate graphs and other representations of your data as it is being recorded. Paper records are replaced by onscreen trending and data is stored on 3.5" disks or memory cards.

Dataloggers are a paperless alternative to chart recorders with better resolution and accuracy. They're ideal for logging data in remote locations for extended periods of time. Download stored data to a PC for easy analysis.

Common Recorder Terms

Attenuation: to weaken a signal by reducing the set range. For example, a span of 0 to 10 V with an attenuation of 2, the overall range becomes 0 to 5 V.

Gain: to increase a signal by amplifying the set range. For instance, a span of 0 to 1 V with gain set at 2, the overall range is 0 to 2 V.

Hybrid: a recording method that combines analog results with digital measured data printing on the same chart paper, without interfering with trend recording.

Input impedance: the resistance measured across the excitation terminals of a transducer when the output terminals are short circuited. Devices such as pressure transducers, pH transmitters, and thermocouples almost always meet this criterion.

Pen offset compensation: each pen in a recorder has the capability to travel the full width of the chart paper. In order to avoid pen collisions, recorders with multiple channels must physically offset the pens from one another resulting in different starting times. To compensate and synchronize traces into the same time line, a buffer zone thus stores the data of the front—most pen and delays its printing.

Zero setting: selects pen location with 0 V input. Use to fine tune input range, especially when the output range of the input device does not quite match the input range of the recorder.

Zero suppression: a multiple by which the zero position of the input signal is elevated. For example, with span selected at 0 to 10 V and zero suppression selected at +2 V, the overall input range is 20 to 30 V.

Related Products

Humidity Recorders: Place these recorders in computer rooms or museums, where monitoring humidity level is important for everyday operation. Many recorders also record temperature and calculate dew point.

Pressure Recorders: These recorders update you on the pressure conditions and help you assess problem areas quickly. Record pressure trends in your water, steam, or gas pipelines.

Temperature Recorders: Recorders help you keep track of production or storage temperatures to ensure product quality and safety. Perfect for pharmaceutical, food, or any industry where temperature monitoring is crucial.

Reference source: http://www.coleparmer.com/TechLibraryArticle/689