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The PRS-812 is a constant voltage, wide range ohmmeter with data logging ��nd calculating capabilities. Fully portable ��nd battery operated, the PRS-812 measures resistance from 0.1 to 1.0x10¹² ohms with measurement accuracy of ��5%. It can be operated in fully Automatic, Automatic,-Manual ��nd Manual modes.

This sophisticated instrument digitally displays measurements in ohms, kilohms, megohms, gigohms ��nd terohms, ��nd in exponential format, e.g., 1.5E8.

It simultaneously displays data with a fully synchronous analog scale using x1, x10 ��nd x100 multipliers, ��nd a bank of color coded LED\��s (10³ to 10¹² Ohms). Multiple test voltages include 0.01-10V, constant 10V ��nd 100V ranges, which may be selected automatically by the instru-ment to comply with industry measurement practices, or manually by the operator.

The PRS-812 records ��nd stores up to 80 measurements, ��nd calculates minimum, maximum ��nd average of all stored data.

Fully automatic, the PRS-812 controls test voltage, resistance ranging ��nd electrification period to make the most accurate ��nd repeatable measurements available to ESD Auditors ��nd technicians.

Range: Optimal Resistance Range from 0.1 (1.0E-1) Ohms to 1 Tera ohms (1.0E+12 ohms). Maximum resistance indication: 200 Tera ohms (2.0E+14 ohms).

Test Voltages: Automatic mode Default: 0.01 to 10 volts Variable 1.0E-1 to 1.0E+4 OhmsConstant Voltage 10 volts �� 0.2 volts 1.0E+4 to 1.0E+6 OhmsAt 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+4 Ohms10 volts �� 0.2 volts 1.0E+2 to 1.0E+9 Ohms100 volts �� 2.0 volts 1.0E+5 to 2.0E+14 Ohms

Accuracy: Overall: �� 5% at ambient conditions (at 23oF ��nd 30% Rh).Specific Range Tolerances:1.0E-1 to 1.0E+1 ohms: ��5% Corrected for Test Lead Resistance1.0E+1 to 1.0E+12 ohms: ��2.0% with 10-foot Test Leads1.0E+12 to 2.0E+14 ohms: ��40%

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 ��nd TW. Includes 19-segment analog scale (1-10 with 0.5 indication) with x1, x10, x100 multipliers. Number of Data Points in Memory (0 �C 80). Automatic Electrification Time (seconds), or Time required to Manually obtain steady state measurement. Displays data HOLD, BATTERY status, MIN, MAX, AVG, REC ��nd Test Voltage (10, 10, or 100 V)

LED Indicators: 14 Color LED��s from 103 to 1014 ohms. Colors (RED, GREEN, YELLOW, or Blank/OFF).

Timer Memory: Times measurements In Seconds up to 99 seconds (Displayed on LCD)Register stores up to 80 data points (MEM # Displayed after RESET)

Response Electrification: Response from 0.1 to 1.0E06 Ohms: 2.0 secondsAverage 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 batteriesOpen Circuit Current (I):4ma @ 100 VoltsFunction/ Mode: Toggles Through Six (6) Operation Modes:

Resistance Range Select: 2 Triangular button Arrows: UP ��nd DOWN . Select ResistanceRange in single decades in Manual ��nd Automatic/Manual modesTest Volts: Manual Selection of 10, 10 or 100 volts in Manual Mode

Record/Recall:Turns Memory Register ON if OFF. Calculates ��nd Displays Minimum,Maximum ��nd Average of data stored in Memory Register.

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 ��nd Display.

Test: Begins measurement sequence.

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

Automatic Function ��nd Exceptional Accuracy:The PRS-812��s Automatic mode is designed to simplify ESD Auditors�� measurement ��nd data recording challenges, while enhancing measurement reproducibility ��nd accuracy. During power-up, the instrument automatically checks its measurement functions, multiple displays ��nd performs a Battery Test. Once ��GOOD�� is displayed, the operator simply presses the TEST button to obtain an accurate measurement. The instrument automatically selects ��nd adjusts test voltage, resistance range, electrification period, then displays ��nd Holds the measurement. 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. The instrument is now ready for the next measurement.

Data Log Calculation:In RECORD mode, the PRS-812 stores up to 80 measurements, ��nd on demand will calculate ��nd display the Minimum, Maximum ��nd Average measurements stored in the register.