Prostat Corporation | ESD Blog

One thing I get asked quite often; how do I set up my Prostat PRS-801 or PRS-812 Resistance Meter for low resistance range calibration? In order to setup your Prostat resistance meter for Low Resistance Range (<10 Ohms) calibration, follow the steps below:

• Install the calibration shunt (PRS-801CC) across the Negative (-) and Positive (+) Lead Terminals (Figure 1, below).

Figure 1: Low Resistance Range Calibration Shunt Installation

• Press the Red ON/OFF power button. The instrument display should become energized, each LED will be tested in sequence, and GOOD will is displayed in the LCD if the batteries have sufficient test capacity (figure 2).
  

  Figure 2: GOOD will is displayed in the LCD

• Allow the instrument circuits to warm-up for a few minutes; approximately 2 – 3 minutes are sufficient, prior to completing the calibration sequence.

• Press MODE once to shift display to ohms mode (Ω).

• Press the Yellow RESET, then the Gray CLEAR button within ½ second. The message CAL will be displayed in the LCD. (See Figure 3).

Figure 3: Complete Calibration Sequence by Pressing RESET. To confirm Calibration, press TEST to measure the Calibration Shunt resistance. Shunt resistance should display 1.02 Ohms ±0.02 Ohms

• Press the Yellow RESET button to complete low range (0.1 to 10 ohm) calibration. The will automatically be cleared when RESET is pressed. (See Figure 8).

• Press the Green TEST button. Indicated resistance should be 1.02 (±0.02) ohms as shown in Figure 8. Press RESET to clear the display
  
  NOTE: If 1.02 (±0.02) ohms is not displayed, repeat the calibration process.

• Remove the calibration shunt assembly from the lead terminals

• The PRS-801 or PRS-812 is now ready for wide range measurements from 0.1 to 2.0E+14 Ohms