อุปกรณ์วัด Control System (pH Analog Controller with Dual Output and Self-Diagnostic Test)

อุปกรณ์วัด Control System (pH Analog Controller with Dual Output and Self-Diagnostic Test)

HI 8711

pH Analog Controller with Dual Output and Self-Diagnostic Test

HI 8711 allows the selection of two set points with two independent outputs for acid and alkaline dosages.
Each model accepts either a direct input from a pH or ORP electrode or from a transmitter through 4-20 mA input. The instrument also provides ±5V power output and input terminals for amplified electrodes. In addition, you can choose the output configuration for connecting a recorder or a PLC, between 0-20 or 4-20 mA.
The HI 8711 incorporates adjustable overtime dosing protection from 5 to 60 minutes. If dosing exceeds selected time, the alarm will be triggered and the dosing contact will deactivate. This feature can be activated or deactivated.

  • Specifications

Range  0.00 to 14.00 pH
Resolution  0.01 pH
Accuracy
@ 20 °C  ±0.02 pH (0 to 100 °C)
±0.05 pH (-20 to 0 °C)
±0.5% (input from transmitter)
Input  high impedance 1012 Ohm; reference and matching pin inputs are available; 4-20 mA
Power Output  ±5 Vcc; 150 mA max load for amplified electrodes
Calibration  offset: ±2 pH with OFFSET trimmer
slope: 80 to 110% with SLOPE trimmer
Temperature
Compensation  fixed or automatic with Pt100, from -20 to 100°C (-4 to 212°F)
Recorder Output  0-20 mA or 4-20 mA (isolated)
Setpoint Relay  2, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected)
Setpoint Range  alk. set: from 0.00 to 14.00 pH
acid set: from 0.00 to 14.00 pH
Alarm Relay  1, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected)
Alarm Range  0.2 to 3.00 pH
Dosing Control  OFF/AUTO/ON with selection switch
Over Dosing Control  adjustable, from 5 min to 60 min with knob or disable by wire strap – on rear panel
Backlight  continuous on
Power Supply  115 VAC ±10% or 230 VAC ±10%; 50/60 Hz
Enclosure  flame retardant ABS body and front panel; transparent splash-proof front cover
Environment  -10 to 50°C (14 to 122°F); RH max 95% non-condensing
Panel Cutout  141 x 69 mm (5.6 x 2.7″)
Weight  1 kg (2.2 lb.)

  • Accessories

Solutions
HI 7004/1L  4.01 pH Buffer Solution
1 x 1 L bottle
HI 7007/1L  7.01 pH Buffer Solution
1 x 1 L bottle
HI 7010/1L  10.01 pH Buffer Solution
1 x 1 L bottle
Accessories
HI 8427  pH and mV Precision Simulator
HI 931001  pH and mV Precision Simulator

Quotation and Ordering

131 Thailand Science Park. Innovation Cluster 1 Building, Klong 1, Klong Luang, Pathumthani 12120 Thailand.Tel. +6681-847-6768, +662-191-3928 Fax +662-191-3929 Mr.Thoniwadh +6685-811-4779, Ms.Nareerat +6685-814-9653Email:info@highents.com

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131 อุทยานวิทยาศาสตร์ประเทศไทย อาคารกลุ่มนวัตกรรม 1 ต. คลองหนึ่ง อ. คลองหลวง จ. ปทุมธานี 12120โทร. 081-847-6768, 02-191-3928 แฟกซ์ 02-191-3929 คุณโทณิวัฒน์ 085-811-4779, คุณนารีรัตน์ 085-814-9653Email : info@highents.com

 

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