• It's easy to handle
• Fire retardant casing
• Selectable overdose protection system
• Splash resistant cover

The BL 931700 mini pH controller has been designed for easy, affordable installation in tight spaces to perform simple yet effective process control. Thanks to its compact size, the BL 931700 mini pH controller can be installed right next to tanks or vats.

This versatile controller is ideal for a wide variety of applications, such as textiles, papers, photographic solutions, plating baths, chemicals and water treatment.This

BL 931700 is provided with a selectable set point for acid or basic dosage.

Measurements are directly taken from a pH electrode in the range from 0 to 14 with a 0.01 pH resolution. Accuracy is ensured by two point calibration, performed manually through trimmers on the front panel.

Users can choose automatic or manual dosing mode with a switch on the front panel. Manual control is particularly useful during maintenance operations, because
it permits operators to enable or disable the dosing relay according to need. The overtime control system advises users when the relay is active for too long, helping to prevent overdosing.

In addition, this model features a 4-20 mA analog output for recorder connection.

Order Information:
BL 931700-0 (12 VDC) and BL 931700-1 ( 115/230V) are supplied with mounting brackets, transparent cover and instruction manual.

Specifications

Range	0.00 to 14.00 pH
Resolution	0.01 pH
Accuracy @ 25°C	±0.02 pH
Calibration	manual, 2 point, with offset and slope trimmers
Dosing Relay	max 2A (fuse protected), 250 Vac, 30 Vdc
Dosing Selection	acid or alkaline contact open=acid dosage=relay ON if measurement > set point contact close=alkaline dosage=relay ON if measurement < set point
Setpoint	adjustable from 0.00 to 14.00 pH
Overtime	adjustable, typically from 5 to approx. 30 minutes
Recorder Output	4-20 mA, accuracy ±0.20 mA, 500 Ohm max load
Input Impedance	102 Ohm
Power Supply	BL931700-0: 12 VDC adapter (included); BL931700-1: 115/230 VAC; 50/60Hz
Dimensions	79 x 49 x 95 mm (3.1 x 1.9 x 3.7’’)
Weight	BL931700-0: 200 g (7.1 oz.); BL931700-1: 300 g (10.6 oz.)
Warranty	2 years