Wholesale high voltage capacitance bridge tester manufacturer: Specification, Ordering and Quality Notes

Scope of Supply and Physical Form

The standard shipment includes the bridge tester mainframe, a calibrated reference capacitor set, high‑voltage output leads rated for 30 kV, a USB‑C firmware interface, and a rack‑mount bracket kit.

The mainframe measures 430 mm wide, 133 mm high, and 450 mm deep, weighing approximately 12 kg in the benchtop configuration.

• Mainframe with integrated high‑voltage isolation barrier
• Reference capacitor bank (0.1 pF–10 µF, ±0.02 % tolerance)
• Output leads with silicone insulation, 30 kV DC rating
• USB‑C port for firmware updates and automated test scripts
• Rack‑mount ears and optional carrying handle

The Problem Buyers Keep Paying For

Aluminum reduces shipping mass and improves heat dissipation, but steel adds 7 dB of EMI shielding that can be decisive in noisy production halls.

How to Choose Before Requesting a Quote

Match the voltage rating to the highest test voltage plus a 20 % safety margin; undersizing leads to premature insulation breakdown and costly downtime.

Select a frequency span that includes the intended test frequency (typically 1 kHz–1 MHz) and verify that the resolution at the low‑end (0.01 pF) meets the tolerance of the smallest devices in the batch.

Assumptions Buyers Should Stop Making

Benchtop Configuration

Best for labs that move the instrument between test stations; the carrying handle adds 0.5 kg but saves crane time.

Requires a dedicated bench space of at least 600 mm depth for safe high‑voltage clearance.

Rack‑Mount Configuration

Fits standard 19‑inch racks; the bracket kit adds 1 kg but eliminates bench‑footprint concerns.

Ensures consistent grounding through the rack chassis, which can improve repeatability by 0.01 % in high‑EMI environments.

How Consistency Is Held Across Batches

Batch repeatability is verified by a three‑step protocol that runs on every lot before release.

• Automated calibration check against a traceable 1 kV reference capacitor; deviation must stay within ±0.03 %.
• High‑voltage withstand test at 1.25 × rated voltage for 60 seconds; no breakdown allowed.
• Temperature cycling from –10 °C to 50 °C over 4 hours; measurement drift recorded and must not exceed 0.02 %/°C.

Results are logged per serial number and stored in the factory MES for full traceability.

Volume Planning and Lead Time

Tooling charges cover custom front‑panel labeling and any non‑standard connector adapters; they are waived for repeat orders exceeding 30 units within 12 months.

Ordering, Tooling and Lead-Time Questions

What is the minimum order quantity for a private‑label front panel?

Five units; the artwork must be supplied as vector PDF with 300 dpi minimum, and a one‑time setup fee of 250 USD applies.

Can the firmware be pre‑loaded with a custom test sequence?

Yes, provided the sequence is delivered as a JSON script at least two weeks before the scheduled build week; no extra charge for up to 20 steps.

What export packaging options exist for sea freight?

Standard wooden crate with desiccant packs and shock indicators; optional vacuum‑sealed barrier bags add 15 USD per unit.

How are calibration certificates handled for private‑label shipments?

Each unit ships with a factory calibration certificate referencing the buyer’s part number; a third‑party ISO‑17025 certificate can be arranged for an additional 120 USD per unit.