Wide Range. Accurate. Portable.

The PRS-812 is a wide range portable constant voltage resistance instrument designed for dedicated ESD Auditors and professionals. The PRS-812 is a cost effective choice for those ESD professionals who require outstanding accuracy and performance, but do not require data downloading.Like its big brother the PRS-801, the PRS-812 has an outstanding performance combination of measurement speed, wide range and accuracy. Its constant test voltage system is extremely stable and consistent with lab level, bench top instruments.

Measurement Range

The PRS-812’s accurate wide range of 0.1 to 1.0×10¹² ohms, with capabilities to 1.0×10¹⁴ Ω, offers exceptional flexibility in measurement applications. In effect, it is 3 instruments in one because it functions as:

1. A low resistance range instrument for measurements from 0.1 to 1.0×10⁴ ohms. Most competitive instruments do not measure accurately at or below 1.0×10³ ohms. Thus, the typical ESD practitioner must carry a DMM for low resistance checks of ground connections.To ensure-field accuracy, the PRS-801CC Calibration Shunt is used to confirm and adjust the accuracy of its 0.1 to 10 ohm resistance range.
2. A wide range audit instrument that meets and exceeds requirements for ANSI/ESD S20.20 and TR53 periodic verification (audit) procedures from 1.0×10³ to 1.0×10¹¹ ohms.Measurement guidelines require accurate measurements from one decade below to one decade above the resistance requirements of a facility’s ESD program. The PRS-812 easily exceeds this requirement by as much as 2 decades, depending on program requirements.

Measurement Flexibility

Connect to Virtually any 2-wire Fixture or electrode configuration.

The PRS-812’s simple ¾ inch terminal spacing provides connectivity to a variety of electrodes and fixtures.

• Terminal design allows use of mechanically shielded or non-shielded banana plug leads
• BNC adapters with ¾ inch spacing mount directly to the PRS-812 terminals for measurements with wide range probes and fixtures

Measurement Speed: Electrification Period

Along with the PRS-801, the PRS-812 is one of the fastest measurement instruments in today’s precision measurement market. Laboratory tests confirm the PRS-812 can measure from 0 to 1.0×10¹² ohms in 2.5 seconds. Thus, its specified electrification period (EP) is 8 seconds in accordance with ANSI/ESD STM 11.11 Surface Resistance of Planar Materials. Furthermore, its EP is automatically adjusted to insure a stable measurement is displayed.

Multiple Modes of Operation

The PRS-812 has Automatic, Manual and Auto-Manual operational modes, plus exponential display or standard numeric display in Ω, KΩ, MΩ, GΩ and TΩ. It’s easy to use and read. Measurements are summarized in decades using multiple LED’s from <10³ to >10¹².

Constant Test Voltages

PRS-812 has three Test Voltages ranges that provide stable test references for repeatable measurements. In AUTO mode, the instrument automatically selects the proper test voltage for the resistance being measured.

 

1. <10 Volts: 0.1 to 9.99×10³ Ω
   <10V is variable across this range from 0.1 mV to 9.99V
2. 10 Volts – Constant Voltage under Load
   Constant at 1.0×10⁴ to 9.99×10⁵ Ω
   Target calibration is to within ± 0.01 volt, and always within ±1%
3. 100 Volts – Constant Voltage under Load
   Constant at 1.0×10⁶ to 1.0×10¹² Ω
   Target calibration is to within ± 0.01 volt, and always within ±0.1%

High Quality Test Leads

Prostat’s 10 foot test leads supplied with each PRS-812 consist of hundreds of fine strands of copper that offer flexibility and accuracy. The outer insulation of each test lead is high grade silicon with an extremely high resistance to minimize measurement errors. These leads are designed for convenient audit measurements in the manufacturing environment up to 1.0×10¹² Ω.

Measurement Convenience & Calculations

Not only does the PRS-812 make accurate measurements quickly, it stores up to 80 measurement data points in its memory. Press the RECORD/RECALL button to retrieve information and calculate attributes of the stored data.

• Minimum Recorded Measurement
• Maximum Recorded Measurement
• Average of all Recorded Measurements

Did you store a message in error? It can be simply selected and removed from the memory register without removing other data points.

The PRS-812 is a convenient, accurate instrument that meets virtually every measurement requirement in the ESD standards world.