Panel Meters for Scale and Weighing Applications P/N LW1000BSG1

Scale & Weighing Panel Meter Frequently Asked Questions

How does relay setpoint offset actually prevent a fill operation from overshooting its target weight?

It lets the shutoff point be set below the actual target — for example, if a delivery spout is known to dispense an additional 2.5 lbs after the valve closes, an offset of -2.5 lbs against a 100 lb target means the valve shuts off at 97.5 lbs, so the extra material dispensed during valve closure brings the final weight up to the intended 100 lbs.

What's the practical purpose of the count-by function, and when would I use something other than count-by-1?

Count-by rounds the display to a coarser resolution than the meter's raw internal count would otherwise show — useful when the actual measurement noise or mechanical repeatability of a scale doesn't justify displaying single-unit resolution, since showing more digits than are actually meaningful can create a false impression of precision. Selecting count-by-10 or higher for a noisier or lower-resolution scale keeps the displayed reading meaningful rather than jittering between adjacent single-count values.

Why would I use the fixed right-hand dummy zero mode instead of just scaling for a smaller number?

This mode is specifically for applications needing to display very large values (up to 999,990) that exceed the meter's normal 5-digit display range — by fixing a zero on the right and shifting the display left, the meter can represent larger numbers, at the cost of losing the ability to show a decimal point in that mode.

How is the auto-zero limit different from auto-tare, since both seem to zero the display?

Auto-zero is a small, continuous drift-compensation feature — whenever the reading settles within a programmed 0-9 count window of true zero (with nothing on the scale), the meter automatically re-zeros to compensate for gradual load cell drift. Auto-tare is a deliberate, operator-triggered action that captures whatever weight is currently on the scale (such as an empty container) as a stored offset for subsequent net-weight readings — the two serve different purposes and can be used together.

Does using the DC signal conditioner board instead of the load cell board sacrifice much accuracy for weighing?

It depends on the load cell's sensitivity — both boards deliver the same 0.01% of full scale ± 2 counts accuracy, but the DC board's most sensitive range (±200 mV, 10 µV resolution) is coarser than the load cell board's most sensitive ranges (±20 mV/±50 mV, 1 µV resolution), so a very low-output load cell would see more benefit from the load cell board's finer resolution.

Can the count-by function and the fixed right-hand dummy zero mode be used together?

Both features address different aspects of a very large or coarse-resolution weighing display, and while they can be combined, doing so compounds the loss of fine display resolution from both — this combination makes most sense for applications with genuinely large capacity scales where neither single-unit resolution nor a decimal point are practically meaningful.

What happens to a stored tare value if the meter loses power?

The tare value is stored in non-volatile memory, so it's retained through a power interruption rather than needing to be re-entered or re-captured every time the meter is powered up.

Can I toggle between gross and net weight without re-taring the scale each time?

Yes — pressing the Reset button on the front panel toggles the display between gross weight (total weight on the scale) and net weight (gross weight with the stored tare subtracted), without affecting or requiring re-entry of the stored tare value itself.

Is the auto-zero function safe to leave enabled for applications where a small amount of material is expected to remain on the scale at "empty"?

Not necessarily — auto-zero is specifically designed to re-zero whenever the reading settles within the programmed window of true zero, so if a small residual amount is expected to remain and shouldn't be zeroed out, either a tighter auto-zero window or disabling the function (entering 0) would be more appropriate than leaving a generous auto-zero window active.

Does the relay setpoint offset value need to be re-entered if the scale's overall calibration changes?

The offset is a separate configuration value from the meter's underlying scale-and-offset or two-point calibration, so a recalibration wouldn't automatically adjust a previously configured setpoint offset — the offset should be reviewed and potentially re-tuned after any recalibration, especially if the physical dispensing delay being compensated for could have changed.

Scale & Weighing Panel Meter Questions From the Field

What does it actually mean for a scale to be "legal for trade," and does that affect what panel meter I can use?

Legal-for-trade status specifically applies to a complete scale system used in a transaction where price is determined by weight (a deli counter, scrap yard, or truck scale billing by weight), and is documented as requiring the scale to pass NTEP (National Type Evaluation Program) certification and evaluation as a complete system, then be sealed by an authorized technician so its calibration can't be tampered with. This is a certification of the whole scale system as installed, not an inherent property of an individual meter component in isolation.

Does NTEP certification apply to individual meter or load cell components, or only to the complete assembled scale?

Documented NTEP guidance is specific on this point: only the final assembled product requires certification — individual scale components themselves do not require separate certification. This means a meter and load cells combined into a complete scale system need the overall system evaluated and certified, not each individual part independently.

What's the difference between calibration and verification for an industrial scale, and do I need both?

These are documented as two distinct, complementary practices: calibration is performed by an accredited technician using NIST-traceable reference weights, produces a formal certificate, and adjusts the scale if needed; verification is an in-house check using certified test weights that confirms the scale reads within acceptance criteria, without adjustment and without producing a formal certificate. Documented guidance states both are needed in a properly managed scale program, and neither replaces the other.

What tolerance should I expect a commercial-trade industrial scale to be held to during inspection?

Documented tolerances for most industrial floor and truck scales used in commercial trade specify an acceptance tolerance of ±0.1% of the applied load, with a looser maintenance tolerance of ±0.2% — a scale found outside these tolerances during inspection is documented as being condemned and removed from commercial service until recalibrated and re-inspected.

Do internal production or QC scales need NTEP certification, or is that only for scales used in customer transactions?

Documented guidance draws a clear distinction: NTEP certification and state inspection requirements apply specifically to commercial transactions where the scale reading determines a price — internal production monitoring, batch tracking, and quality control applications where no price is set by the reading do not legally require NTEP certification, though calibration traceability is still typically required by most quality management frameworks.

How can I verify whether a specific scale model actually holds valid NTEP certification?

Documented guidance recommends checking for a visible Certificate of Conformance number (CC#) on the scale itself or its most recent calibration report, and independently verifying that number against the National Conference on Weights and Measures' public online database — this cross-check is specifically recommended when purchasing or evaluating older equipment where physical documentation may not be readily available.

Are there different accuracy classes for legal-for-trade scales, and does that affect which one I need?

Yes — documented accuracy classes include Class II (high precision, used for jewelry, laboratory, or pharmaceutical applications), Class III (general purpose, used for grocery, shipping, and industrial applications), and Class IIIL (larger capacity, used for vehicle and floor scales) — each class carries a documented limit on the number of scale divisions, so matching the correct class to the actual application and required precision matters when specifying or verifying a scale system.

Who actually performs the inspection and seals a legal-for-trade scale once it's certified and calibrated?

Documented process describes a state-approved weights and measures inspector who examines the installed scale, and if it meets requirements, applies a physical seal (such as a sticker) over the calibration setting as tamper-evident proof of compliance — since the scale is only legal for trade while that seal remains intact, this same verification is documented as being legally required again at regular intervals based on how frequently the scale is used.