35.6 Test Selection Method ........................................ 225.7 Units ....................................................................... 235.8 Dilution Factor ...................................................... 235.9 System Lock ......................................................... 245.10 User Defined Tests ............................................ 245.11 Language ............................................................ 255.12 Set Time/Set Date/Date Format ...................... 265.13 Time Out ............................................................. 265.14 Back Light ........................................................... 275.15 LCD Contrast ...................................................... 275.16 Version ................................................................ 276. Analysing Samples ........................................................ 286.1 Selecting Test Parameters ................................. 286.2 Dilution Factor ...................................................... 296.3 Blanking the Photometer 7500 Bluetooth ........ 306.4 Reading Results with the Photometer 7500Bluetooth ...................................................................... 316.5 Timer ...................................................................... 326.6 Changing Result Units of Expression ............... 337. Calibration/Validation .................................................... 357.1 Check Standard Mode ........................................ 35Enter Check Standard Values .................................. 36