Digital field meter with Charge Plate Set CPS

The Safeguard SFM PRO CPS combines a precise field meter with a Charge Plate Set (CPS), becoming a charge plate monitor for verifying air ionizers per DIN EN 61340-5-1 and EOS/ESD S3.1. The conductive plastic housing and high-grade components ensure reproducible measurements within the ESD control concept.

At the top sits a star-shaped induction electrode in front of which an earthed modulation impeller rotates (field mill principle); a ring electrode system protects impeller and field plate. With the CPS the unit measures the decay time from +1,000 V to +100 V and -1,000 V to -100 V via an integrated start-stop timer; charging is performed by an external HV converter. In CPS mode voltages up to max. 2 kV are shown.

Key benefits

• Two instruments in one: field meter and charge plate monitor
• Ionizer verification: decay time measurement per IEC 61340-5-1 / EOS-ESD S3.1
• Reproducible measurements via the plate capacitor at 20 pF +/- 2 pF
• Hold function to freeze the reading in hard-to-reach places
• Very high zero-point stability: no adjustment needed before each measurement
• One-button operation with battery monitoring and automatic shut-off

Applications

• Periodic verification of ionizers (decay time and offset) in the EPA
• Measuring electrostatic fields and charges on surfaces and components
• Audits and routine checks in ESD workplace management

Standards and compliance

The charging electrode capacity (20 pF) complies with IEC 61340-5-1 and EOS/ESD S3.1; the dimensions (75 x 150 mm instead of 150 x 150 mm) deviate. Reproducible measurements are readily possible; fully standard-compliant measurements require the larger Charge Plate Monitor CPM.