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.
Installation cut-out dimensions are provided as well as outside panel dimensions.
Adjustable location brackets allow the controller to slide easily and securely into place..
Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy (@25°C/77°F) ±0.02 pH Calibration manual, 2 points 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 Input Impedance 10¹² Ohm Analog Output 4 to 20 mA, accuracy ±0.20 mA, 500 Ω maximum load 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 BL931700-0 (12 VDC) and BL931700-1 (115/230 VAC) are supplied with mounting brackets, transparent cover and instruction manual.