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A Showa load cell replacement changes the measurement chain even when the replacement fits the original fixture. The old calibration certificate remains useful for identifying test points and required performance, but it does not certify the new sensor. Plan the replacement around the machine's required force measurements and the evidence needed to release it back into service.
Use the old certificate to recover the test requirements
Read what was calibrated: the bare transducer, a sensor-and-indicator pair, or the complete machine. Note serial numbers, loading direction, reference equipment, units and the reported results. An entry belonging to the old assembly must not be relabelled with the new serial number. If a customer specification requires a particular calibration scope, confirm it with the calibration provider before ordering.
The METRAVON MV-LC0099 is an S-type axial tension/compression candidate with listed capacities from 500 to 2000 kg. Its nominal 2 mV/V sensitivity is not the individual correction coefficient for your machine. Thread geometry, engagement and alignment must be approved before a calibration appointment is meaningful.
Showa load cell replacement: define the new calibration chain
| Record | What must describe the replacement |
|---|---|
| Identity | New sensor serial number, capacity, indicator and relevant firmware or configuration. |
| Fixture | Adapters and load direction used during testing, including any permanent preload. |
| Points | Applied forces spanning the actual working interval and the required loading sequence. |
| Results | As-found and adjusted readings where applicable, unloading behaviour and agreed acceptance limits. |
Do not assume that a tension-only certificate establishes compression performance. A reversing test fixture may change contact faces, take up clearance or introduce bending as the force changes direction. Specify both directions when both are used, and include the region near zero if that affects the process decision.
Retire the old coefficients without losing the history
Back up the existing instrument configuration before alteration. Identify which coefficients are factory sensor data and which are machine-level adjustments. Enter replacement data only through the instrument's documented procedure, then verify the assembled response. Keep the superseded record marked as belonging to the removed sensor rather than deleting it.
Schedule the mechanical installation, electronics setup and calibration in that order. If an adapter is changed after calibration, assess whether the change affects the force path and requires another test. A certificate dated before the final fixture revision cannot by itself demonstrate the finished assembly's performance.
Questions before booking calibration
Q1. Can the previous span factor be used temporarily?
It may help an authorised diagnostic comparison, but it is not an accepted calibration for the replacement. Keep the machine out of measurement-dependent production until the required checks establish the new relationship between force and indication.
Q2. Is sensor accuracy the machine acceptance limit?
No. Fixture behaviour, electronics and the test method also contribute. Derive the machine limit from its intended measurement task and contractual requirements, then agree how it will be demonstrated.
Q3. Does replacing the cable require another review?
Identify whether the cable is part of the calibrated assembly and follow the instrument's connection requirements. Cable changes can affect excitation or signal conditions; the calibration provider should determine the checks needed for the modified chain.
Summary
A replacement is complete when the calibration evidence identifies the new assembled chain. Provide the original certificate, fixture details and required force directions when requesting an MV-LC0099 suitability assessment.
