Instruction manual

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MODEL XMT-P pH/ORP SECTION 3.0
WIRING
3.3 SENSOR WIRING
3.3.1 Sensor Wiring Information
pH and ORP sensors manufactured by Rosemount Analytical can be wired to the Model XMT-P transmitter in three ways:
1. directly to the transmitter,
2. to a sensor-mounted junction box and then to the transmitter,
3. to a remote junction box and then from the remote junction box to the transmitter.
The pH (or ORP) signal can also be preamplified in one of four places. See Section 7.4.3 for set-up. The transmitter is fac-
tory configured with a preamplifier.
1. in the sensor (a, d),
2. in a junction box mounted on the sensor (c),
3. in a remote junction box (e).
4. at the transmitter (b).
NOTE: For 22K NTC RTDs, wire leads to TB1-1 and TB1-3.
3.3.2 General Wiring Configurations
Figure 3-5 illustrates the various wiring arrangements for Xmt-P.
FIGURE 3-5. Wiring and Preamplifier Configurations for pH and ORP Sensors.
The asterisk identifies the location of the preamplifier. In (a) and (b) the sensor is wired directly to the transmitter. The signal is ampli-
fied at the sensor (a) or at the transmitter (b). In (c) the sensor is wired through a sensor-mounted junction box to the transmitter.
The preamplifier is in the sensor-mounted junction box. In (d) and (e) the sensor is wired through a remote junction box to the trans-
mitter. The preamplifier is located in the sensor (d) or the junction box (e).
Refer to the Instruction Sheet provided with each sensor for specific wiring instructions.