Apex Classic Setup and Programming Guide v2.2
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ports and calibration of the connected probes is the same for all probes on the
system. The Base Module ORP probe will be identified as “ORP”, the ORP probe
on the PX1000 Probe Expansion as “ORPA”, “ORPB” and so on, and probes on
Apex Probe Module 1 (PM1) as “ORPx3”, “ORPx4” and so on.
The ORP probe is connected to the port labeled “pH/ORP” on the Apex Base
Module and Probe Module 1. Push the BNC female connector on to the male
connector and turn ¼ turn clockwise to lock the connector place. To remove the
probe, turn ¼ turn counter clockwise and gently pull the connector straight off
the base module.
All new probes should be rinsed in clean tap water before placing in the
aquarium. Place the ORP probe in an area with high flow that is continuously wet
(not an overflow that may drain dry, for example). Maintain a drip loop in the
wire back to the Apex Base or Probe Module.
NOTE: New ORP probes typically read low and require a break-in period. It may
take as long as a week to break-in the ORP probe. During this break-in period
control functions based upon ORP are not recommended.
WARNING: We do not recommend fully submerging the ORP probe as this
will cause the probe to fail prematurely.
To enable ORP probes:
Apex Display: Setup – ORP Setup – ORP Enable – If you have more than
one ORP port on your system, use the up/down arrow keys to choose the
port you wish to configure, press Select, then use the up/down arrow keys
to select on/off for that port, press Save when done or Exit to discard
changes.
Web Interface: This option is not available from the Web Interface.
NOTE: To configure the pH/ORP port on an Apex Base Module to be used for ORP,
simply set ORP ON in the ORP Enable menu. Similarly, to configure the pH/ORP
port on a Port Module 1 to be used for an ORP probe, simply set ORPx3, ORPx4,
etc to the ON setting in the ORP Enable menu.
ORP PROBE CALIBRATION
ORP probes do not need to be calibrated to operate properly, they should operate
normally for the life of the probe without calibration. However, the
