Hirel HH972 Operating Manual
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Hirel HH972 Operating Manual

Digital pocket oscilloscope, oscilloscope mode, meter mode
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Summary of Contents for Hirel HH972

  • Page 1 Rev. A.5...

  • Page 2: Table Of Contents

    For warranty service or repair, this instrument or accessories must be returned to a service facility or a local representative designated by Hirel. Buyer shall prepay shipping charges to Hirel or its local representative, Hirel or its local representative shall pay shipping charges to return it to buyer.

  • Page 3: Safety Instructions

    § Use only the AC ADAPTER provided with the scope or the ST972 BATTERY STAND to supply the HH972 unit. Use only the same adapter to charge the ST972 or ST972-EC internal 9V battery. § Never permit water to enter the interior of the instrument and accessories and never subject them to severe mechanical shock.

  • Page 4: Pocket Scope Overview

    § Test leads included (test probe not required). Because of its low cost, small size and technical performances, the HH972 is well suited for educational purposes. Applications cover digital and analog signals, telecommunication, GPS, TV and audio, line-operated equipment, sensors, signal analysis in automotive (with optional ST972-EC), car stereo etc.

  • Page 5: C- Back Panel

    HH972 is continuously catching and displaying the incoming signal. For a clear view of the waveform, press the HOLD button. This causes the HH972 to store and display the waveform just captured. The mark "fRUN" changes to "fHOLD".

  • Page 6: C- Measure Tools

    The manual settings of scales can be operated by selecting SCALE mode or by directly using when in AUTO mode. In the later case, the HH972 directly enters SCALE mode. Enter AUTO mode. In case it is desired to see displayed waveform in a different scale from what the HH972 automatically sets, press MODE twice to enter SCALE mode.

  • Page 7: E- Dc Offset Control

    Figure 3 "ZERO" before going back to AUTO mode. Otherwise the HH972 may behave erroneously. -F- MENU selection Use the MENU button, to access the HH972 operating modes. Refer to the contents displayed in the following table. → ← DIODE →...
  • Page 8 SLOPE Select POS. (positive) or NEG. (negative) slope for triggering point. The HH972 unit will capture the incoming waveform according to your choice, at a point close to zero, on the slope of the signal waveform specified here. To access SLOPE parameter, use the MENU button.

  • Page 9: G- Meter Mode

    A and K plugs become active with a sweeping voltage of +/-5V on A plug, referenced to K plug. I/V curve is now shown as illustrated by dotted line in Fig.7, for diode testing. For resistor testing, the HH972 displays a linear curve and a rounded value in the bottom right corner of the panel. (see Fig.8) Warning: It is recommended to attach probes to semiconductor devices through a resistor for current limitation (as shown in Fig.6).
  • Page 10 Insert the HH972 unit into the ST972 holder, making sure to properly align the registration pins during the insertion (see Fig.10). Pins are positioned to hold the scope in place. Then, plug the left-hand side 9V battery output jack into the HH972 connector to get it powered (see Fig.11).

  • Page 11: Specifications

    This Vertical Stand includes an approx. 10-hour rechargeable battery Battery Stand with the AC adapter. It provides an easy way to handle the HH972 (OPTIONAL) and see the display. Size: 7.9" x 4.5 " x 3" (20 x 11.4 x 7.6 mm).
  • Page 12 The information in this guide is subject to change without notice and should not be construed as a commitment by the HIREL CORPORATION. HIREL CORPORATION AND ITS REPRESENTATIVES SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR THE INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS DOCUMENT.

This manual is also suitable for:

St972

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