Emerson Process Management 53eA Manual De Usuario
11
MODEL 54eA
SECTION 3.0
WIRING
3.3.3 Wiring 499ACL-01 (free chlorine) sensors and pH sensors for automatic pH correction.
If free chlorine is being measured using the 499ACL-01 sensor and the pH of the liquid varies more than 0.2 pH
unit, a continuous correction for pH must be applied to the chlorine reading. Therefore, a pH sensor must also be
wired to the 54eA controller. This section gives wiring diagrams for the pH sensors typically used.
unit, a continuous correction for pH must be applied to the chlorine reading. Therefore, a pH sensor must also be
wired to the 54eA controller. This section gives wiring diagrams for the pH sensors typically used.
When using the 499ACL-01 sensor (free chlorine) with a pH sensor, use the RTD in the pH sensor for meas-
uring temperature. DO NOT use the RTD in the free chlorine sensor.
uring temperature. DO NOT use the RTD in the free chlorine sensor.
The pH sensor RTD is needed for temperature measurement during buffer calibration. During normal operation,
the RTD in the pH sensor also provides the temperature measurement required for the free chlorine membrane
permeability correction.
the RTD in the pH sensor also provides the temperature measurement required for the free chlorine membrane
permeability correction.
NOTE
When wiring a pH and a 400ACL-01 amperometric sensor to the controller, connect the anode
and reference terminals (TB3-1 and TB5-1) with the 10M
and reference terminals (TB3-1 and TB5-1) with the 10M
Ω jumper (PN 23980-00) provided with
the analyzer.
Refer to the table to select the appropriate wiring diagram. Most of the wiring diagrams require that two or more
shield wires be attached to a single terminal. Use the pigtail wire and wire nuts packed with the chlorine sensor to
make the connection.
shield wires be attached to a single terminal. Use the pigtail wire and wire nuts packed with the chlorine sensor to
make the connection.
Free chlorine sensor cable
pH sensor
Figure
Standard
399VP-09
3-5
Standard
399-14
3-6
Standard
399-09-62
3-7
EMI/RFI or Variopol
399VP-09
3-8
EMI/RFI or Variopol
399-14
3-9
EMI/RFI or Variopol
399-09-62
3-10
FIGURE 3-5. 499ACL-01 sensor with standard cable
and 399VP-09 pH sensor without internal preamplifier.
DWG. NO.
REV.
4054eA01
B