Calibrating The Transmitter; Overview; Zero Calibration; Table 7-8: Advanced Options - Honeywell SmartLine STIW400 User Manual

Item
Read Power Level
Read Tag Name
Write Tag Name
7.5

Calibrating the transmitter

Overview

Calibration by the user is optional, performed with the OneWireless user interface. The
transmitter is calibrated at the factory and will operate within its specified tolerances without any
additional calibration by the user. Performing a calibration through the OneWireless interface
will not affect the factory calibration. Clearing any calibration through the OneWireless
interface will not affect the default factory calibration, it will only remove the calibration
performed by user through this interface. Performing a calibration may increase the accuracy of
measurement, and/or adjust the measurement to match known setpoints.
There are 2 types of calibration possible on any AITB (Voltage, Temperature, Current,
Resistance) in the transmitter. Each of these are mutually exclusive; you can either apply a Zero
Calibration OR Two Point Calibration, not both. These are:

1. Zero Calibration

2. Two Point Calibration
Note: Calibration is only supported while the transmitter is connected to the WDM. Local / Offline
calibration using the provisioning device is not supported.
Zero Calibration
For Zero Calibration, the user applies a signal to the input which is the desired Zero value for the
PV. This could be zero mV or mA etc or it could be a baseline value for which all measuremnts
should be referenced to. In the WDM interface for the channel that is being calibrated, the user
should select 'CAL ZERO' from the Cal Cmd combo box and click apply. The unit will then
measure the input and then subtract that value from all PVs. The Cal Status will change to USER
indicating the calibration is complete and is active.
Revision 1

Table 7-8: Advanced Options

Description
Reads the transmission power level of the transmitter radio.
Reads the transmitter's tag name
Write the transmitter's tag name with the entered text, maximum 16
characters
1. Set the process input to the transmitter to the desired zero state.
2. Ensure the transmitter channel mode is Out of Service.
3. In the WDM interface, select the transmitter channel. In the Calibration
Menu set "Cal Cmd" to "Cal Zero" and press Apply.
4. Ensure that the "Cal Status" changes to "User"
SmartLine Wireless Temperature and Universal I/O User's Manual
7. Operation
7.5. Calibrating the transmitter
57