中文摘要：

基于PC的多路定标系统是BESⅢ触发系统的检测及监视手段之一，由PC机、两块PCI总线定标器卡和相应的驱动及应用软件构成。该系统可以实现对64路信号的定标、实时监控和记录，并通过网络向在线系统分发相关数据。本文介绍该定标系统的硬件结构、软件设计及长期运行稳定性测试结果。

英文摘要：

A multi-channel scaler system was designed for system check and status monitoring of the BESⅢ trigger system. It is composed of a PC, two PCI interface multi-channel scaler cards, the corresponding drivers and user programs. A total of 64 signals can be scaled and monitored in real time. The scaled data are recorded locally and some of them are distributed to the online system In this paper, the hardware structure, software development and long time stability of the system are introduced.