Orp Calibration - Emerson Rosemount 1057 Instruction Manual

Section 7: Calibration
April 2017
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 ORP sensor. The following calibration
routine is covered.
Table 7-2 ORP calibration routine
Measure Section Menu Function
ORP 7.3.2 Standardization
A detailed flow diagram
ORP 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 adjacent screen appears. To calibrate ORP or Temperature, scroll to
the desired item and press ENTER.
The following sub-sections show the initial display screen that appears for each calibration routine.
Use the flow diagram
prompts to complete calibration.
7.3.1 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.
The adjacent screen appears after selecting ORP calibration.
If the ORP Cal is successful, the screen returns to the Cal sub-menu.
The adjacent screen appears if ORP Cal is unsuccessful.
44
Default
Description
Settings
ORP One point buffer calibration with manual buffer value entry
(Figure 7-2) is provided at the end of this section to guide you through the
(Figure 7-2) for ORP calibration at the end of this section and the live screen
Instruction Manual
LIQ-MAN-1057
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Calibrate?
ORP
Temperature
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Enter Value
+0600 mV
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Standardize
Offset Error
Calculated: 61.22mV
Max: 60.00mV
Press EXIT
Section 7: Calibration