Using the Computer Interface

4

General Information (RS-232 and IEEE-488)

loaded, the Message Available (MAV) bit in the Status Byte Register is set true. (For more information, see "Status Byte Register" later in this chapter.)

Numeric output from the instrument is returned as shown in the following examples:

∙Integer Values Examples

3 In response to RANGE? query, range is 3 for the selected function.

0 In response to ALARMS? query, there are no alarms on this channel.

∙Scientific Notation Values

+1.2345E+6 Measured value of 1.2345 X 106

+12.345E+6 OHM

Measured value of 12.345 X 106 ohms (format 2)

+1E+9

Positive overload (“OL” appears on the display).

-1E+9

Negative overload (“-OL” appears on the display).

+9E+9

Open thermocouple indication (“otc” appears on the display).

Service Requests (IEEE-488 only) and Status Registers

Service requests let an instrument on the IEEE-488 bus get the attention of the host. Service requests are sent over the service request (SRQ) line.

Note

If the instruments is in the remote state without front panel lockout (i.e., REMS), a service request can be sent from the front panel by pressing (up button picture).

If more than one instrument on the bus is capable of sending service requests, the host can determine which instrument made the request by taking a "serial poll". Each instrument on the bus responds to the poll by sending the contents of its Status Byte Register (STB). If an instrument on the bus has made a service request, the request service bit (RQS, bit 6) of its Status Byte Register (STB) will be set to 1, identifying it as an instrument that requested service.

The contents of the Status Byte Register (STB) are defined by the Service Request Enable Register (SRE), Event Status Register (ESR), Event Status Enable Register (ESE), and the output buffer. These status registers are discussed in the following paragraphs. Figure 4-4 shows the relationship of these registers.

4-17

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Fluke 2620A, 2625A user manual Service Requests IEEE-488 only and Status Registers
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2625A, 2620A specifications

The Fluke 2625A is a sophisticated data logger designed for a wide range of industrial and laboratory applications. This versatile instrument excels in capturing and monitoring temperature and voltage measurements with precision and reliability. One of its standout features is its ability to record data from various sensors, making it ideal for environments where comprehensive data acquisition is critical.

Equipped with a large LCD display, the Fluke 2625A provides clear and user-friendly access to real-time measurement data. Its graphical interface allows users to visualize trends and monitor readings easily, which significantly enhances usability. The device supports a variety of input types and can connect to thermocouples, RTDs, and other sensors, offering great flexibility for various measurement tasks.

The Fluke 2625A employs advanced measurement technologies that ensure accuracy in data logging. With a high sampling rate, it captures fast-changing signals while maintaining data integrity. The device features a built-in memory that allows for extensive logging, accommodating long-term monitoring tasks without requiring constant oversight. Users can set it to log data at specified intervals, offering customizable solutions for different monitoring needs.

Another significant characteristic of the Fluke 2625A is its robust communication capabilities. The device supports USB and RS-232 interfaces for easy connectivity with computers and other devices, making data transfer and analysis seamless. This feature is especially beneficial for users who need to compile or analyze large sets of data quickly.

Furthermore, the Fluke 2625A is designed with durability in mind. Its rugged construction makes it suitable for challenging environments, including those with high levels of vibration, dust, or moisture. This reliability ensures that the device can withstand the rigors of fieldwork while still delivering accurate measurements.

In summary, the Fluke 2625A is a powerful data logger that combines versatility, accuracy, and reliability. Its user-friendly interface, advanced measurement technologies, and robust design make it an essential tool for professionals in various industries, from manufacturing and HVAC to research and development. Whether monitoring temperature changes in a laboratory or assessing voltage levels in an industrial setting, the Fluke 2625A stands out as a trusted solution for effective data logging and analysis.
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