Three different pieces of evidence
Beamex's terminology separates 校准 from adjustment: as-found data describe the state before adjustment, and as-left data the state afterwards. These labels identify when measurements were made; they do not replace the actual readings or method.
In a work instruction, reserve one section for initial results, another for any intervention and another for the subsequent verification. If no adjustment was performed, record that fact and follow the agreed reporting procedure. Do not invent a second test or silently duplicate readings to make a form look complete.
Retain comparable paired readings
For a 压力-indicator comparison, record the reference reading and the 仪表 indication in the same 压力 unit and with the same 压力 reference. Add the point identity, direction, time and relevant conditions required by the procedure.
Use a stated sign convention. For the example below:
Indication error = 仪表 indication − reference reading.
If a later calculation uses percentage of span, record the span used as its denominator. Do not switch between percentage of reading and percentage of span without saying so. The linked specification guide explains that distinction.
One hypothetical point, before and after work
Assume the reference reading is 2.000 bar at one test point, on a common agreed 压力 basis:
- Initial 仪表 indication: 2.030 bar; indication error: +0.030 bar.
- After an authorized adjustment, repeat reference reading: 2.000 bar.
- Final 仪表 indication: 2.005 bar; indication error: +0.005 bar.
These invented values demonstrate record separation and arithmetic, not a WESIVO accuracy claim or a customer's test. The smaller final error does not reconstruct the initial state at any unmeasured point or establish the earlier process history. One point cannot establish the behaviour across the entire range.
No pass/fail conclusion is made here. That needs the applicable acceptance requirement, measurement uncertainty and an agreed decision rule for the stated scope.
Record an intervention without erasing the finding
Identify the action actually performed, its authorization and the configuration before and after it. A range change, zero trim, repair and simple data correction are different events. Retain the initial observations and link the repeat test to the same device and job.
If initial readings are unavailable, say so. A final verification cannot be relabelled as a historical as-found result. Let the responsible team decide whether missing evidence requires further investigation or prevents acceptance.
A reference certificate is part of the evidence
NIST's 校准 policies explain that a calibrated reference alone does not establish traceability of every subsequent measurement; the comparison chain and uncertainty of the measurement process also matter. Retain the reference identification, applicable certificate information, method and relevant conditions.
Do not replace the whole comparison uncertainty with a catalogue accuracy number. Nor does citing a metrology source certify the selected WESIVO equipment or a service provider.
Specify the equipment and deliverable separately
For a WESIVO 880 enquiry, state the 压力 type, range, medium, connections and required reference performance. For a WESIVO 521 压力-source enquiry, confirm the required 压力 points, compatible connections and operating method. The 压力 source is not an independent 压力 reference.
Ask separately for the documentation required for the actual comparison and any external 校准 service. Neither a product listing nor this record template establishes accreditation, software integration or a complete automated 校准 system.
三种不同的证据
Beamex 的术语说明将校准与调整分开：As-found 数据描述调整前状态，As-left 数据描述调整后的状态。这些标签说明测量发生的阶段，不能替代实际读数和方法。
作业指导书中，应分别保留初始结果、实施的操作和随后的核查记录。没有调整时，如实记录并执行约定的报告程序。不能虚构第二次测试，也不能为填满表格而无说明地复制读数。
保留可比较的成对读数
比对压力指示仪表时，参考读数与仪表示值应使用相同压力单位和压力基准。附上规程要求的测点、方向、时间及相关条件。
先明确误差正负号的约定。本例采用：
示值误差 = 被测仪表示值 − 参考读数。
后续若换算成量程百分比，应记录作为分母的量程跨度。不能在读数百分比与量程百分比之间无说明地切换，相关规格指南说明了两者区别。
一个测点的假设前后记录
假设某一测点参考读数为 2.000 bar，均采用约定的相同压力基准：
- 初始仪表示值 2.030 bar，示值误差为 +0.030 bar。
- 获准调整后复测，参考读数再次为 2.000 bar。
- 最终仪表示值 2.005 bar，示值误差为 +0.005 bar。
这些虚构数据仅演示记录分离和算术，不是 WESIVO 精度承诺或客户测试。最终误差变小，不能重建未测点的初始状态，也不能证明此前过程历史。单点结果不能代表全量程表现。
本文不作合格或不合格判定。判定需要适用的验收要求、测量不确定度，以及针对既定范围约定的判定规则。
记录操作，但不抹去初始发现
说明实际实施的动作、授权，以及操作前后的配置。改变量程、零点微调、维修和单纯的数据更正，是不同事件。保留初始观测，并将复测关联同一设备和任务。
初始读数缺失时，应如实注明。最终核查不能重新命名为历史调整前结果。缺失证据是否需要继续调查、是否影响验收，应交由责任团队决定。
参考证书只是证据的一部分
NIST 校准政策说明，单有一台经过校准的参考仪表，并不能使后续每次测量自动具备溯源性；比较链和测量过程不确定度也很重要。保留参考仪表身份、适用的证书信息、方法及相关条件。
不能用样册中的精度数字代替整个比对的不确定度。引用计量资料，也不等于认证所选 WESIVO 设备或服务机构。
分别明确设备与交付要求
询价 WESIVO 880 时，说明压力类型、量程、介质、连接及参考性能要求。询价 WESIVO 521 压力源时，确认所需压力点、兼容连接和操作方式。压力源不是独立的压力参考仪表。
实际比对所需文件，以及任何外部校准服务，应另行明确。产品条目或本文记录模板，都不代表认可资质、软件集成或完整自动校准系统。
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。