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Ratio:Guard

®

Advanced EC & pH Monitor

Designed for stand alone monitoring or for automatic control of EC & pH when

used with the Anderson J+ Advanced Injector controller

GETTING TECHNICAL ASSISTANCE

The H.E. Anderson Company

 is dedicated to assisting our customers with installation and use of our 

products. Our technical staff are available each weekday from 8:30am to 4:30pm central time. You may 
call us toll free at 

1-800-331-9620

 from anywhere in the U.S.A.. and Canada. If no one is available, we 

will promptly return your call.

Before you call,

 we suggest that you review this manual. You may find the answer to your question here.

But even if you do not, reviewing the manual will help us to help you.

There is some information

 you should have available when you call. You should know the software 

version and serial number of your control unit. Also, you should note the number of pumpers of each type,
and their model numbers. We may not need all this information, but having it available at the start can 
some times save a lot of time and trouble for you. You may record the information on the information page
below for convenient reference.

If you need an additional owners manual for any H.E. Anderson Company product, please visit our 
website at 

http://heanderson.com/manuals.php

03/18/21

UNPACKING

Please open and inspect your 
package upon receipt. Your 
package was packed with great 
care and all the necessary 
packing materials to arrive to you
undamaged. If you do find an 
item that is broken or damaged, 
you must contact the delivering 
carrier to report the claim.

ATTENTION!

Your pH electrodes must 
be calibrated before use. 

Summary of Contents for Ratio:Guard Advanced

Page 1: ...information you should have available when you call You should know the software version and serial number of your control unit Also you should note the number of pumpers of each type and their model...

Page 2: ...with the following sensors accessories Anderson Digital EC Transmitter W Cable Mounting Tee for above Anderson Digital Temperature Transmitter W Cable Mounting Tee for above 4 20 ma Toroidal EC Transm...

Page 3: ...check the wiring Mounting Ensure the installation location has all the following Allow easy access to front panel Must have access to 120 VAC power outlet R Close proximity to other injector component...

Page 4: ...sponding numbers on the terminal block 1 Signal Ground 2 Signal Input 3 5 VDC supply 4 Sample valve for taking water samples Valve provides restriction to main water line to force flow through sensor...

Page 5: ...sensor cable to the corresponding numbers on the terminal block 1 Signal Ground 2 Signal Input 3 5 VDC supply Powering Up The Unit Plug the controller A surge suppressor uninterrupted power supply sho...

Page 6: ...lacement Other repairs are made by replacing complete circuit board assemblies This should be done only by an authorized repair person or under the direction of our technical staff Factory Service Sho...

Page 7: ...rmal base display Line 1 shows the pH value and source electrode 1 2 or Avg Line 3 shows the EC and temperature F if a digital temperature probe is present Lines 2 4 will show pH EC alarms Lines 2 4 m...

Page 8: ...electrode attached will show as not calibrated on this screen An input which has not been assigned to a digital or analog input will be shown as such Unassigned inputs cannot be calibrated Press Enter...

Page 9: ...y the best choice is a contactless toroidal EC sensor It is more expensive but provides superior reliability and much lower maintenance With an analog input you must also enter the EC range limit This...

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