Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 183)

<15. OPERATION OF SENCOM pH/ORP>
15-14
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
Browse through the menu items by pressing until you find the desired menu and then press
to enter that menu. It is also possible to enter a desired menu by pressing the ¯ symbol
beside the menu item.
For calibration (HOLD), read chapter 17, and for commissioning, read chapter 16.