 We're going to calibrate a CBL conductivity probe. To start out, press Apps on your calculator. Select ChemBio, press Enter. Go to Setup Probes, Number Probes, 1. Type of probe, select Conductivity. We're going to set the switch on the conductivity probe to 0 to 2000. It's in Channel 1. We're going to perform a new calibration. We're going to wait 30 seconds for it to warm up. Press Enter. This is a two-point calibration. The first point, I'm going to remove the conductivity probe from the distilled water. The first point will be in Air. We wait for the reading on the CBL to be stable. We press Trigger on the CBL and enter a reference value of 0. We'll place the conductivity probe in the standard solution. Wait until the CBL reading is stable again. Press Trigger on the CBL and enter a reference value of 1,000. We will get a sloping intercept for the calibration line. This will take us back to the main menu.