อุปกรณ์วัด pH (pH Mini Controller with 4-20 mA Recorder Output)

BL 931700

pH Mini Controller with 4-20 mA Recorder Output

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.

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  See Chart
Dimensions  79 x 49 x 95 mm (3.1 x 1.9 x 3.7’’)
Weight  See Chart

Accessories

Solutions
HI 7004L  4.01 pH Buffer Solution
1 x 500 mL bottle
HI 7007L  7.01 pH Buffer Solution
1 x 500 mL bottle
HI 7010L  10.01 pH Buffer Solution
1 x 500 mL bottle
HI 70300L  Electrode Storage Solution
1 x 500 mL bottle
HI 7061L  General Purpose Cleaning Solution
1 x 500 mL bottle
Accessories
HI 740146  Mounting Brackets for BL 931700 Housing
HI 710005  Power Adapter, 115 Vac to 12 VDC, US Plug
HI 710006  Power Adapter, 230 Vac to 12 VDC, European Plug
Probes
HI 1001  Flow-thru Monitoring pH Electrode with BNC Connection and 3 m Cable