Orp Calibration Routine - Emerson 1057 Instruction Manual

MODEL 1057
7.3 ORP CALIBRATION
7.3.1 DESCRIPTION
For process control, it is often important to make the measured ORP agree with the ORP of a standard solution. During
calibration, the measured ORP is made equal to the ORP of a standard solution at a single point.
THIS SECTION DESCRIBES HOW TO CALIBRATE THE MODEL 1057 WITH AN ORP SENSOR. THE FOL-
LOWING CALIBRATION ROUTINE IS COVERED.
TABLE 7-2

ORP Calibration Routine

Measure Sec.
ORP 7.3.2
A detailed flow diagram is provided at the end of Sec. 7 to guide you through the calibration routines.
To calibrate ORP:
1. Press the MENU button
2. Select Calibrate. Press ENTER.
3. Select Sensor 1 or Sensor 2 corresponding to
ORP. Press ENTER.
4. Select ORP. Press ENTER.
The following sub-sections show the initial display screen that appears for each calibration routine. Use the flow
diagram for ORP calibration at the end of Sec. 7 and the live screen prompts to complete calibration.
7.3.2 STANDARDIZATION — ORP
For process control, it is often important to make the
measured ORP agree with the ORP of a standard
solution. During calibration, the measured ORP is made
equal to the ORP of a standard solution at a single
point. This screen appears after selecting ORP calibra-
tion:
If the ORP Cal is successful, the screen will return to the
The following screen may appear if ORP Cal is
unsuccessful.
42
Menu function: default
Standardization — ORP
Description
1 point buffer calibration with manual buffer value entry
The following screen will appear. To calibrate ORP or
Temperature, scroll to the desired item and press
ENTER.
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN Calibrate?
ORP
Temperature
Cal sub-menu.
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN Enter Value
+0600 mV
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN Standardize
Offset Error
Calculated: 61.22mV
Max:
Press EXIT
SECTION 7.0
CALIBRATION
1.234ºC
1.234ºC
1.234ºC
60.00mV