Computer Upgrade for a Varian CFT-20 FT-NMR Spectrometer forUndergraduate Instruction

化学系正在为目前用于本科教学的瓦里安CFT-20傅里叶变换核磁共振（NMR）系统购买TECMAG Mercury-S12/LoEC计算机升级。该设备取代了当前的瓦里安620微型计算机，配备了一台Macintosh 710080 /80计算机和专门设计的光谱采集板、接口、Deskwriter 660打印机和MacNMR软件。这次升级到行业标准的32位计算机，具有多种低成本I/O设备，使学生能够在最少的监督下获得一维或二维碳和质子核磁共振光谱。目前的仪器是PPG工业公司的礼物，具有可靠的电磁体和固态仪器控制电路，但在嵌入式微型计算机、示波器可视化界面和笨重的核磁共振光谱采集软件方面存在问题，这些软件难以编程，并且包含在磁带和8英寸软盘上。这次升级延长了现有仪器的使用寿命，改进了用户界面，扩大了常规和高级光谱采集的使用范围，并作为Appalachian学院协会其他学院使用类似的电磁体核磁共振光谱仪的升级模型。

The chemistry department is purchasing a TECMAG Mercury-S12/LoEC computer upgrade for the Varian CFT-20 Fourier-transform nuclear magnetic resonance (NMR) system currently used for undergraduate instruction. This equipment replaces the current Varian 620 minicomputer with a Macintosh 7100/80 computer and specially designed spectral acquisition boards, interfaces, Deskwriter 660 printer, and MacNMR software. This upgrade to an industry standard 32-bit computer with a wide selection of low-cost I/O devices, enables students to obtain one-dimensional or two-dimensional carbon and proton NMR spectra with a minimum of supervision. The current instrument, a gift from PPG Industries, has reliable electromagnet and solid-state instrument control circuitry but suffers from problems with the embedded minicomputer, oscilloscope visual interface, and cumbersome NMR spectral acquisition software that is difficult to program and is contained on cassettes and 8-inch floppy disks. This upgrade extends the life of the current instrument, improves the user interface, expands its use for both routine and advanced spectral acquisition, and serves as an upgrade model for other colleges in the Appalachian College Association with similar, failing electromagnet NMR spectrometers.