MINI CONTROLLERS
BL 931700 pH Mini Controller
SPECIFICATIONS
Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy (@20°C/68°F) ±0.02 pH Calibration manual, 2 point, with offset and slope trimmers Dosing Relay 1, max 2A (fuse protected), 250 VAC, 30 VDC Setpoint Dosing Selection adjustable from 0.00 to 14.00 pH acid or alkaline contact open=acid dosage;
activated when reading exceeds setpoint value
contact closed=alkaline dosage; activated when
reading falls below setpoint value Overtime adjustable, typically from 5 to approx. 30 minutes Recorder Output 4-20 mA, accuracy ±0.20 mA, 500 Ohm max load Input Impedance 10
12 Ohm Power Supply BL 931700-0: 12 VDC adapter (included) BL 931700-1: 115/230 VAC; 50/60Hz Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9’’)
BL 931700 mini ph controller has been designed for easy, affordable installation in tightspaces to perform simple yet effective process control. Thanks to its compact size, BL 931700can be installed right next to tanks or vats. This versatile controller is ideal for a wide varietyof applications, such as textiles, papers, photographic solutions, plating baths, chemicals and
water treatment. BL 931700 is provided with a selectable setpoint for acid or basic dosage. Measurements aredirectly acquired from a ph electrode in the range from 0 to 14 with a 0.01 pH resolution.
Accuracy is ensured by the 2 point calibration, performed manually through trimmers on the
front panel. You can also choose automatic or manual dosing mode with a switch on the frontpanel. Manual control is particularly useful during maintenance operations, because it permitsyou to enable or disable the dosing relay according to your need. The overtime control system
advises you 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. Two modelsare available, with different power supply input at 115/230 VAC or 12 VDC.
Weight BL 931700-0: 200 g (7.1 oz.) BL 931700-1: 300 g (10.6 oz.)
ORDERING INFORMATION: ACCESSORIES:
BL 931700-0 is supplied complete with mountingbrackets, transparent cover, 12 VDC power adapter
and instructions. HI 7004L pH 4.01 calibration solution,500 mL bottle BL 931700-1 is supplied complete with mountingbrackets, transparent cover and instructions. HI 7007L pH 7.01 calibration solution,500 mL bottle HI 7010L pH 10.01 calibration solution,500 mL bottle HI 70300L Electrode storage solution,500 mL bottle HI 7061L Electrode cleaning solution,500 mL bottle HI 710005 115 VAC/12 VDC power adapter HI 1001 Dimensions HI 710006 230 VAC/12 VDC power adapter HI 740146 Mounting brackets
For a complete range of pHelectrodes, see pages 63-71 Industrial Products Catalog
• www.hannainst.com
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