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1
1. Introduction
The 870ITPH Intelligent Transmitter converts pH, ORP, or Ion Selective Electrode
measurements to a 4 to 20 mA and/or digital output signal depending on the model selected and
the configuration implemented.
The analog only output version (Model 870ITPH-A) supports configuration, calibration, and
diagnostic troubleshooting locally at the front panel. The transmitter has one 4 to 20 mA dc
output which can be software configured (connected) to temperature compensated measurement,
uncompensated (absolute) measurement, or temperature.
The digital output version (Model 870ITPH-F) supports configuration, calibration, and
diagnostic troubleshooting locally at the front panel, via a PC-based configurator anywhere on the
signal leads, or from any I/A Series workstation via an Intelligent Transmitter Fieldbus Module.
The digital output version supports either digital only communication or a hybrid 4 to
20 mA dc/digital communication as configured. When operating in either of these modes, the
transmitter continuously outputs three digital measurement values: temperature compensated
measurement, uncompensated (absolute) measurement, and temperature. In the 4 to 20 mA
mode, you may assign the output to any one of the three measurement parameters.
Quick Start
The purpose of this section is to:
Help you to wire your transmitter
Familiarize you with the instrument configuration as received from the factory
Assist you in verifying that your transmitter is in calibration
Explain normal operation in Measure mode.
Wiring
Your 870IT is a 2-wire transmitter. As such, it transmits output over the same two wires through
which it receives power. If your transmitter was specified with analog communications
(870ITPH-A), you must supply its power source. If it was specified with digital communications
(870ITPH-F), power can be provided via the I/A Series Fieldbus Module. Connect this
power/output signal to the power terminals and the signals from your measurement sensor to the
appropriate terminals near the top of the case as shown in Figure 1.
WARNING
!
Wiring installation must comply with any existing local regulations.
WARNING
!
A safety agency certified energy barrier must be used with this apparatus to meet
agency certification requirements. See MI 611-206 (FM/CSA) or MI 611-208
(ATEX) for details.
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