Filter
Top Products
ROC827 Instruction Manual
Issued Mar-06 Calibration 7-1
Chapter 7 – Calibration
This section provides information about calibration procedures for the
Analog Input (AI) modules, HART Input module, RTD Input module,
and Multi-Variable Sensor (MVS) Input module. For the full calibration
procedure, refer to the ROCLINK 800 Configuration Software User
Manual (Form A6121).
In This Chapter
7.1 Calibration................................................................................................7-1
7.2 Preparing for Calibration..........................................................................7-1
7.1 Calibration
Use ROCLINK 800 Configuration software to perform initial calibration
or re-calibration of the inputs on the AI, HART, RTD, and MVS
modules. Re-calibration would occur, for example, after a change in an
orifice plate in the meter run handled by the ROC827. Calibration can be
performed on sensor inputs from either orifice meter runs or turbine meter
runs.
The AI and MVS calibration routines support five-point calibration, with
the three mid-points calibrated in any order. The The low-end or zero
reading is calibrated first, followed by the high-end or full-scale reading.
The three mid-points can be calibrated next, if desired. The RTD
calibration routine supports three-point calibrations.
The HART calibration routine supports two-point calibration. The low-
end or zero reading is calibrated first, followed by the high-end or full-
scale reading.
The diagnostic System Analog Inputs are not designed to be calibrated.
7.2 Preparing for Calibration
Before calibrating the inputs from a sensor, HART device, or other
device, you should prepare the ROC827 unit.
1. Verify the inputs are correctly wired. For information on wiring the
inputs, refer to Chapter 4, Input/Output Modules.
2. If calibrating a pressure sensor input, be sure to remove the sensor
from the flow as directed in the calibration procedure in the
ROCLINK 800 Configuration Software User Manual (Form A6121).
3. Verify that any external monitoring devices (such as multimeters) are
connected to the ROC827 unit, if they are required for the calibration.