User Manual

<1. INTRODUCTION AND GENERAL DESCRIPTION>
1-1
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
1. INTRODUCTION AND GENERAL
DESCRIPTION
ThismanualdescribeshowtousetheFLXA21withYokogawa’sorothercompanies’sensors.
Please read carefully this manual and the instruction manual of the relevant sensor before using
this instrument.
ForthespecicationsoftheFLXA21,pleaserefertotheGeneralSpecications(GS12A01A02-
01E)intheattachedCD-ROM.
TheFLXA212-WireAnalyzercanperform4kindsofmeasurements–pH/ORP(oxidation-
reduction potential), contacting conductivity (SC), inductive conductivity (ISC) or dissolved
oxygen(DO)–withtherespectivesensormodule.
For the pH/ORP measurement, the FLXA21 can be connected to conventional analog pH/ORP
sensors,andtoYokogawa’sdigitalsensor,FU20FpH/ORPSENCOMSensorwiththerespective
sensor module.
The FLXA21 can perform single or dual sensor measurement. For dual sensor measurement,
the combination of two same type sensor inputs – pH/ORP and pH/ORP (analog sensor only),
SCandSC,andDOandDO–areavailablewithtwosensormodules.
WhenusingwiththepH/ORPSENCOMsensor,pleaserefertothesection15,16and17ofthis
manual for the operation, commissioning and calibration respectively.
1
ON
2
ON
Cable entry holes
Wiring cover 1 (for the first module)
Jumper holder
(provided only for
pH measurement)
Front view
Front view with the front panel opened
Front view with all wiring covers removed
Reboot switch
(Do not use it)
Terminal block
for power supply
LCD display (not provided in some models)
Slide switch
(for HART only)
Wiring cover 2
(for the second module)
Front panel
The first module
(The second module if any
is installed here.)
Nameplate
(Wiring cover 3 for power
supply and grounding is
under the wiring cover 2.)
Figure 1.1 Parts names and descriptions
1
PH
SC
ISC
DO
SENCOM