1. Start with the 压力 medium
Choose an air-operated pump when the procedure requires pneumatic 压力 or vacuum. Choose a hydraulic pump when the 仪表 and procedure require a liquid medium. The medium must also be compatible with the test 仪表, seals and reference 仪表. A 压力 range alone cannot establish that a pump is suitable.
2. Separate working range from safety limit
The WESIVO 521 is listed at -0.095 to 6 MPa, while the WESIVO 522 is listed at -0.08 to 60 MPa. The 522U has selectable 0–160, 0–260 and 0–300 MPa configurations. These are working-range choices from the product information. A maximum safe 压力, where stated, is a safety boundary and must not be treated as the normal operating range.
3. Define the test points
List the lowest, normal and highest points, and state whether the procedure requires increasing points, decreasing points, vacuum points or a zero check. Fine adjustment helps approach a test point; it does not define the accuracy of the 校准. The reference 仪表 and the complete test method determine how the result is evaluated.
4. Check connections and adapters
Provide the test 仪表 and reference-仪表 connection standards, thread sizes, seals and any manifold arrangement. WESIVO product information lists different connection arrangements across the 521, 521S, 522 and 522U. Confirm the ordered configuration and 压力 rating; a matching thread name by itself does not prove mechanical or sealing suitability.
5. Select the complete measurement system
The pump is a 压力 source, not automatically the reference standard. Specify the reference 表压 or calibrator, adapter set, hoses, procedure and required record. Ask for confirmation of the complete setup when the result will support acceptance, maintenance release or traceable 校准.
6. What to send with an RFQ
Include the 仪表 model, range, medium, target points, positive or vacuum requirement, connection, reference 仪表, quantity and delivery country. This information lets WESIVO review a suitable pump family and identify missing configuration details before quotation.
1. 先确认传压介质
需要气压或真空时，优先核对气压泵；被测仪表和程序要求液体介质时，核对液压泵。介质还必须与被测仪表、密封件和标准仪表兼容，不能仅凭压力范围判断泵是否适用。
2. 区分工作范围与安全边界
WESIVO 521 资料列出 -0.095~6 MPa，WESIVO 522 资料列出 -0.08~60 MPa，522U 可核对 0~160、0~260 和 0~300 MPa 量程选项。这些是产品资料中的工作范围选择。资料注明的最高安全压力属于安全边界，不能当作日常工作量程使用。
3. 明确校准点
列出最低、正常和最高校准点，并说明是否需要升压点、降压点、真空点或零点检查。微调功能用于接近校准点，不代表整套校准的准确度。结果如何评价，还取决于标准仪表和完整测试方法。
4. 核对接口与转接件
提供被测仪表和标准仪表的连接标准、螺纹尺寸、密封方式及阀组结构。521、521S、522 和 522U 的资料列有不同接口方案，应确认订购配置和承压等级；螺纹名称一致本身不能证明机械和密封适配。
5. 选择完整测量系统
校验泵是压力源，不能自动等同于标准仪表。应同时明确标准压力表或校验仪、转接件、软管、程序和记录要求。如果结果用于验收、维护放行或可追溯校准，应要求供应商确认完整配置。
6. 询价时提供什么
请提供被测仪表型号、量程、介质、目标压力点、正压或真空要求、接口、标准仪表、数量和收货国家。这样 WESIVO 才能核对合适的泵系列，并在报价前指出缺少的配置条件。
沟通您的应用需求
请提供介质、工况、连接、输出、数量及收货地区，WESIVO 将在报价前核对配置。