PRS-801 Resistance System Set

The PRS-801 is a unique, wide range ohmmeter with data logging, calculating and computer communication capabilities. Fully portable and battery operated, the PRS-801 measures resistance from 0.1 to 2.0x10¹⁴ ohms with measurement accuracy of ±5%. It can be operated in Automatic, Automatic-Manual and Manual modes.

To enhance accuracy in the 0.1 to 10 ohm ranges, the PRS-801 incorporates an automatic self calibration feature. Low range self calibration is performed using a defined resistance reference supplied with the system.

This sophisticated instrument digitally displays measurements in ohms, kilohms, megohms, gigohms and terohms, and in exponential format, e.g., 1.5E+8. It simultaneously displays data with a fully synchronous analog scale using x1, x10 and x100 multipliers, and a bank of color programmable LED's (<10³ to >10¹⁴ Ohm). Multiple test voltages are available in <10V, 10V and 100V ranges, which may be selected automatically by the instrument to comply with industry measurement practices or manually by the operator.

The PRS-801 records and stores up to 80 measurements, and calculates Minimum, Maximum and Average of all stored data. Data may be downloaded to standard computer systems via the instrument's RS-232 Output Port, serial cable and supplied software for ESD Program documentation in Windows^® Excel^® spread sheets.

Fully automatic, the PRS-801 controls test voltage, resistance ranging and electrification period to make the most accurate and repeatable measurements available to ESD Auditors and laboratory technicians.

® Windows and Excel are registered trademarks of the Microsoft Corporation.

Range:
Resistance from <0.1 (1.0E-1) Ohms to 200 Tera ohms (2.0E+14 ohms). Maximum Resistivity with S11.11 concentric ring 2.0E+15 ohms/square

Test Voltages:
Automatic mode Default: <0.01 to 10 volts Variable 1.0E-1 to 1.0E+4 Ohms
Constant Voltage 10 volts ± <0.2 volts 1.0E+4 to 1.0E+6 Ohms
At 10 & 100 Volts 100 volts ± <2.0 volts 1.0E+6 to 2.0E+14 Ohms

Manual Mode: <0.01 to 10 volts Variable 1.0E-1 to 1.0E+5 Ohms
10 volts ± <0.2 volts 1.0E+3 to 1.0E+9 Ohms
100 volts ± <2.0 volts 2.0E+5 to 2.0E+14 Ohms

Accuracy:
Overall: ± <5% at ambient conditions (at 23oF and 30% Rh).
Specific Range Tolerances:
1.0E-1 to 1.0E+1 ohms: ±5% Corrected for Test Lead Resistance
1.0E+1 to 1.0E+12 ohms: ±2.0% with 10-foot Test Leads
1.0E+12 to 2.0E+14 ohms: ±40% or ±0.25 Decade with Grounded, Shielded Leads

Display:
Multi-function 2-5/8” x 1-5/8” Liquid Crystal Display with 0.5" digit height. Displays 3-1/2 digits in Ohms, or 1.0EXX in exponential format. Ohms Display indicators: W, KW, MW, GW and TW. Includes 19-segment analog scale (1-10 with 0.5 indication) with x1, x10, & x100 multipliers. Number of Data Points in Memory (0 – 80). Automatic Electrification Time (seconds), or Time required to Manually obtain steady state measurement. Displays data HOLD, BATTERY status, MIN, MAX, AVG, REC and Test Voltage (<10, 10, or 100 V)

LED Indicators:
14 Color Programmable LED’s from <103 to >1014 ohms. Colors (RED, GREEN, YELLOW, or Blank/OFF) may be operator programmed in SETUP mode.

Timer:
Times measurements In Seconds up to 99 seconds (Displayed on LCD)

Memory:
Register stores up to 80 data points (MEM # Displayed after RESET)

RS-232 Output:
Digital format: Exponential Power followed by Integer.

Response & Electrification:
Response from >0.1 to <1.0E06 Ohms: <2.0 seconds
Average Measurement Period from 0.1 ohms to 1.0E12 Ohms 2.5 Seconds. Calculated Electrification Period per ESD S11.11, 7.5 seconds 0.1 ohms to 10E+12 Ohms. Programmed Electrification 1.0E+12 to >2.0E14 Ohms: 15.0+ seconds

Power:
Two 9-VDC alkaline batteries. Nominal battery life 25 hours.

Dimensions:
4.0" wide x 6.0" long x 2.0" deep.

Weight:
22 ounces, with batteries

Open Circuit Current (I):
<4 ma @ 100 Volts

Resistance Range Select:
2 Triangular button Arrows: UP ­ and DOWN ¯. Select Resistance
Range in single decades in Manual and Automatic/Manual modes
.
Test Volts:
Manual Selection of <10, 10 or 100 volts in Manual Mode

Record/Recall:
Turns Memory Register ON if OFF. Provides access to all data in Memory Register. Calculates and Displays Minimum, Maximum and Average of data stored in Memory Register.

Send:
Transmits data in Memory Register to RS-232 Output Port

Clear:
Erases data in Memory Register; if in HOLD mode, discards most recent Held Value

ON/OFF:
Power-up, perform functional & Battery tests. Power down if ON.

Batt. Test:
Displays GOOD on LCD if acceptable voltage or Lo if unacceptable

Reset:
Enters (saves) data into Memory Register, Clears HOLD and Display.

Test:
Begins measurement sequence.

Battery Buss Cut OFF:
ON/OFF Switch isolates batteries from instrument circuits for storage & transport

Automatic Function and Unparalleled Accuracy:
The displayed measurement is the average of eight consecutive measurements, all within ±5% of each other. The measurement is “saved” in the Memory Register by pressing RESET.

Data Log, Calculation & Computer Communication:
In RECORD mode, the PRS-801 stores up to 80 measurements, and on demand will calculate and display the Minimum, Maximum and Average measurements stored in the register. Using its RS-232 output and cable accessory, the PRS-801 will communicate with computer serial ports. The instrument is supplied with the new PROSTAT® Audit Program on a 3-1/2 inch disc, which contains spread sheet templates for recording ESD Audit Program Data in Excel® software. The PRS-801 computer output and Program disk are compatible with the Semtronics SCCN® ground monitoring system.