User Manual

<16. COMMISSIONING OF SENCOM pH/ORP>
16-3
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
16.1 Sensor setup
“Sensor type” setup is determined by the sensor to be connected to the instrument. Select one of
the following three sensor types:
pH: Only pH is measured.
ORP: OnlyORPismeasured.UsethissettingfortheORPmeasurementonthebasis
of a glass electrode. For the measurement on the basis of a reference electrode,
selectpH+ORPandthenselectORPin[Measurement].
pH+ORP: BothpHandORParemeasuredsimultaneously.ThissetupalsoallowsrHtobe
measured. ORP measurement is based on a reference electrode
Table 16.2 Selecting sensor types
Sensor type Measurement (Sec. 16.2.1) Description
pH + ORP
pH
ORP For the ORP measurement on the basis of
a reference electrode
pH + ORP
pH + rH
rH
pH (not displayed) Same of pH of “pH + ORP”
ORP (not displayed)
For the ORP measurement on the basis of
a glass electrode
NOTE
Thedefaultof[Sensortype]ispH+ORP.Changethissettingforyoursensors.Notallsensor
typesareavailableforsomeSENCOMsensors.Forexample,pHcannotbeselectedwhenan
ORP sensor is connected.
NOTE
The selection of “Sensor type” determines the menu structure throughout the instrument.
WhenpH+ORPisspeciedasthesensortype,theobjectundermeasurementwillbedisplayed
at the top of “Measurement setup.”
IfthesensortypeischangedfrompHtoORP,partoftherelevantsetupisreset,requiring
reconguration.
WhenORPisspecied,andwhenanORPsensordoesn’thaveanytemperatureelement,
setbothof“Temperaturetoohigh/low”in“Errorconguration”toOffsothatnorelatederroris
caused. (Refer to the section 16.4.) Without temperature input, a temperature shown on the Main
displayisthemaximumortheminimumtemperatureofthetemperatureelement’srangeseton
theTemperaturesettings.Settingin“Displaysetup”canmaketemperaturevalueonthedisplay
not to be displayed. (Refer to the section 16.7.)
Setting the Safe sensor disconnection to “Enable” allows operators to disconnect sensors. The
defaultis“Disable.”
Whenthissettingis“Disable,”thesafesensordisconnectionisnotguaranteedbecausesensors
are performing measurement or automatic update parameters are being updated.
When this setting is “Enable,” sensors are not performing measurement or automatic update
parameters are not being updated, thus sensors can be disconnected safely.
16
SENCOM