Yokogawa SPS24 - Manual (Page 18)

<3. Sensor Management>
3-1
IM 12A01S02-01E 1st Edition : May 10, 2013-00
3. Sensor Management
Clicking on [Sensor management] from the toolbar will display “Current measurement readings,”
which shows the measurement value of sensors connected to the PC.
With this function, users can view sensor measurements, adjust sensor performance and
settings, or calibrate sensors.
By default, measurement targets and calibration objects are as shown in Table 3.1.
Table 3.1 Measurement targets and calibration objects
Sensor type *1 pH+ORP measurement *2 Measurement Target Calibration object *3
pH Functions as a pH sensor
regardless of the setting
pH, Temperature pH, Temperature
ORP *4 Functions as an ORP sensor
regardless of the setting
ORP, Temperature ORP, Temperature
pH+ORP pH pH, Temperature pH, Temperature
ORP *4 ORP, Temperature ORP, Temperature
pH+ORP pH, ORP, Temperature pH, ORP, Temperature
pH+rH pH, rH, Temperature pH, rH, Temperature
rH rH, Temperature rH, Temperature
*1: “Sensor type” options of [Sensor management] – [Sensor setup].
*2: “pH+ORP measurement” options of [Setup] – [pH/ORP] – [pH/ORP common settings].
*3: “Calibration object” options of [Sensor management] – [Start calibration] – [Calibration wizard].
*4: In the case of the ORP measurement on the basis of a reference electrode, please choose “ORP” of Sensor type “pH+ORP.”
In the case of the ORP measurement on the basis of a glass electrode, please choose Sensor type “ORP.”
For details, refer to User’s Manual of Model FLXA21 2-Wire Analyzer (IM 12A01A02-01E).
3.1 [Performance]
Clicking on [Performance] in “Current measurement readings” will display the sensor
performance screen, which shows the sensor information.
Table 3.2 Sensor performance
Item Description
Calibration /
Maintenande
information
Last calibration pH, ORP, rH,
Temperature
Date/time of last calibration and type of calibration
Projectes replacement Date of sensor replacement required for measurement accuracy,
which is predicted based on the preventative maintenance
function.
Calibration
data
pH zero, slope Calibration value and date/time of last update
ORP zero, slope
rH zero, slope
Temperature offset
Sensor
wellness
Zero, Slope, Impedance 1,
Impedance 2
Sensor health
Higher % value of each gauge means superior parameter health.
Measuring
data
pH sensor Electromotive force of the pH sensor
ORP sensor Electromotive force of the ORP sensor
rH sensor Electromotive force of the rH sensor
Impedance 1 Glass membrane resistance (for detecting possible damage to
the glass electrode)
Impedance 2 Impedance of the reference electrode junction