Mini pH Controller
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Enhanced Accuracy & Precision
The BL931700 model offers a manual two-point calibration with pH values displayed out to two decimal places.
External Disabling Feature
A normally open contact may connect to a level controller or flow monitor. This safety feature may be used to prevent continuous dosing in the event of specific or undesired system conditions.
Adjustable Dosing Relay
The BL931700 features a dosing relay which may be configured to dose above or below a user programmable pH setpoint.
Selectable Overdose Protection
The mini controller may be programmed to deactivate a valve, pump, or connected device if its activation continues over a selected time; adjustable from 5 to 30 minutes.
Selectable Control Override
With the flick of a switch, normal “Auto” operation may be overridden turning your connected device “Off” from operation or always “On.”
Analog Output Communication
The BL931700 features a 4 - 20 mA analog output for connection to a data logger, chart recorder, or other device.
Matching Pin Connection
An included matching pin option helps protect the sensor from ground loop effects that may lead to erratic readings or system damage.
Fuse Protected Dosing Contacts
The mini controller is protected for up to a 2A load from the connected pump or device.
Easy Peripheral Connection
Quick-connect terminal blocks provide for easy connection to power, communication, dosing control, or sensors.
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Front ViewInstallation cut-out dimensions are provided as well as outside panel dimensions. |
Side ViewAdjustable location brackets allow the controller to slide easily and securely into place. |
Resources
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Specifications
Specification Name Detail SKU BL931700 pH Range 0.00 to 14.00 pH pH Resolution 0.01 pH pH Accuracy (@25°C/77°F) ±0.02 pH Calibration manual, through offset and slope trimmers Dosing Relay maximum 2A (fuse protected), 250 Vac, 30 VDC Dosing Selection acid or alkaline contact open=acid dosage=relay ON if measurement > setpoint contact closed=alkaline dosage=relay ON if measurement < setpoint Setpoint adjustable from 0 to 14 pH Overtime adjustable, typically from 5 to approximately 30 minutes Recorder Output 4 to 20 mA, accuracy ±0.20 mA, 500 Ω maximum load Input Impedance 10^12 Ohm Power Supply BL931700-0: 12 VDC adapter (included); BL931700-1: 115/230 VAC; 50/60Hz Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9’’) Weight BL931700-0: 200 g (7.1 oz.); BL931700-1: 300 g (10.6 oz.) Ordering Information Supplied with mounting brackets, transparent cover and instruction manual. Recommended Probe HI1001 PVDF body pH electrode with 1/2” NPT thread, BNC connector and 3 m (9.8’) cable for continuous flow-thru monitoring (not included). - Product Manuals
