Maintenance 7

Calibration

External Trigger Input Test

The External Trigger Input Test verifies that the rear panel trigger input of Hydra Series II is functioning properly.

1.Switch OFF power to the instrument and disconnect all high voltage inputs.

2.Remove the Alarm Output eight terminal connector module from the rear of Hydra Series II and all external connections to it. Connect short wires (to be used as test leads) to the GROUND and TR terminals. Leave other ends of wires unconnected at this time. Reinstall the connector. Refer to Figure 7-5.

3.Switch power ON.

4.On Hydra Series II, select the VDC function, 30V range for channels 0 through 5.Select a scan interval of 30 seconds.

5.Select trigger ON to enable the external trigger input. Press the Kand M (TRIGS) buttons (the display shows TRIG), then press either the up or down arrow buttons to display ON. Press E.

6.Press Hydra Series II’s Qbutton. Hydra Series II should scan channels 0 through 5 once every 30 seconds.

7.During the interval when scanning is not occurring, connect (short) the test leads of the TR and ground Alarm Output terminals.

Ensure the connection causes a single scan to occur.

8.Disconnect (open) the TR and ground connection.

Ensure the scan continues to execute at its specified interval.

 

 

ALARM OUTPUTS

DIGITAL I/O

+ – 0 1 2 3 TR

0 1 2 3 4 5 6 7 Σ

+

–

0

1 2 3 TR

 

9-16 V

 

+30V

!

 

 

 

DC PWR

 

 

op67f.eps

Figure 7-5. External Trigger Test

Calibration

Note

Refer to the Fluke Hydra Series II Service Manual (P/N 688868) for calibration procedures. The instrument must be stabilized in an environment with an ambient temperature of 22 to 24ºC and a relative humidity of less than 70% and must have been turned on for at least 30 minutes prior to calibration.

The instrument features closed-case calibration controlled over the Computer Interface. Using known reference sources, closed-case calibration has many advantages. There are

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Fluke 2635A user manual Calibration, External Trigger Input Test
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2635A specifications

The Fluke 2635A is a highly advanced multichannel data acquisition system designed for engineers and technicians requiring precision and versatility in their measurement tasks. This instrument excels in monitoring and capturing data from various sources, making it a valuable tool in laboratories, production environments, and field applications.

One of the standout features of the Fluke 2635A is its ability to support up to 20 measurement channels. Users can simultaneously monitor multiple signals, which is crucial for complex testing scenarios where numerous variables need to be tracked. The device is equipped with a 6.5-digit precision measurement capability that ensures high accuracy and resolution in readings. This level of precision is particularly beneficial in applications such as environmental monitoring, research and development, and industrial process control.

The unit incorporates a variety of measurement modes, including voltage, current, temperature, and resistance, making it exceptionally versatile. The Fluke 2635A not only handles standard signals but also integrates with various transducers, providing extensive compatibility for users engaged in diverse testing applications.

To enhance data management, the Fluke 2635A offers advanced data logging capabilities. Data can be stored internally or transferred to external devices for further analysis. The internal memory can accommodate extensive datasets, which can be crucial in long-term monitoring tasks. Integration with external software enables users to analyze and visualize data effectively, allowing for informed decision-making based on comprehensive results.

The user interface is designed for ease of use, featuring a large, bright LCD display that clearly presents measurements and status information. The device is also equipped with a simple navigation system, allowing users to switch between channels and measurement types without hassle.

In terms of construction, the Fluke 2635A is built to withstand rigorous environments. It features a robust design that ensures reliability and durability, making it suitable for both laboratory settings and field operations. Furthermore, the device supports a wide temperature range, thus enabling usage in diverse conditions.

Overall, the Fluke 2635A is a powerful and flexible instrument that provides precise measurements across multiple channels, supporting a wide range of applications. Its advanced technology, combined with user-friendly features, makes it an essential tool for professionals in various fields. The combination of accuracy, flexibility, and durability solidifies its standing as a trusted choice for data acquisition and monitoring tasks.
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