NanoTron units are designed to automate pH / ORP control and the addition of various chemicals or activate other devices via a relay output. Nano-P and Nano-R units include:
– One totalizing water meter input that can be configured for contacting head or hall effect meter inputs.
– One drum level input that can be set for one of the following: alarm display only, alarm display and force of relay 1, alarm display and force off relay 2 or alarm display and force of relay 1 & 2.
– Two mechanical relay outputs with normally open and normally closed contacts that can be configured for powered or dry contact relay operation (see page 4 diagram). Relay 1 is labeled “pH” or “ORP” and Relay 2 is labeled “Relay 2” if pigtails are provided.
– A “force on” timer that allows for manual activation of the relays for a user defined amount of time.

pH Control (P) – The pH function monitors and controls pH on a scale of 0-14 pH units. The unit can be configured for single or dual set point control. Relay 1 is controlled be the single pH set point with the following settings: Set Point (rising for acid feed or falling for caustic feed); Differential (the amount of reading change that must occur before the relay is turned off); Limit Timer (the relay is forced off if the limit time is met). For dual set point control to feed both an acid and a caustic the Relay 2 Set menu must be configured for Dual pH instead of a timer. This setting will add additional settings in the pH Set menu for the second set point. Relay 1 will operate off of the falling setpoint and Relay 2 off of the rising. The High, Low Alarm settings and limit timer are the same for single or dual pH set point control.

ORP Control (R) – The ORP function monitors and controls ORP on a scale of 0 to +1000 mV using relay 1.

Relay 2 Set – The second relay can be controlled by one of the following modes:
Set Point 2 for pH units, Alarms for P (not doing dual set point) or R units or one of the selectable timers below:

Pulse Timer – Accepts dry contact pulses from a water meter (supplied separately). It can accumulate1-9999 pulses to activate the timer to run from 0-99 minutes, 59 seconds. Timer will store up to 5 additional activations during an individual run time.
Recycle Timer – Provides a user defined “off” time in HH:MM and a user defined “on” cycle in MM:SS that is repeated constantly.
28-Day Timer – 28-day feed timers, typically used for biocide feed are based on a 28-day cycle with two independent programmable feed cycles allowing for feed on selectable days and weeks.
Utility – Relay on all of the time.