Obsnap Instruments Sdn Bhd
29A, Jalan SS 15/4C,
47500 Subang Jaya,
Selangor, Malaysia.
+603-5621 5786
+603-5621 5829

pH Digital Controllers pH 500

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pH Digital Controllers pH 500 Process Instrumentation Water / Liquid Analysis

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  • Single or dual set point
  • Fully programmable
  • mA and VDC recorder output or RS232
  • Differential input for ground loop protection
  • Automatic three point calibration
  • Last calibration data
  • Automatic Temperature Compensation
  • Simple wiring with removable terminal modules

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output,  115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:
Each pH 500 model is supplied complete with mounting brackets and instructions.

Specifications

Range pH 0.00 to 14.00 pH
  Temperature -9.9 to 120°C
Resolution pH 0.01 pH
  Temperature 0.1°C
Accuracy @ 20°C pH ±0.02 pH
  Temperature ±0.5°C
Input Impedance   1012 Ohm
pH Calibration   automatic, one, two or three point, at pH 4.01, 7.01, 10.01
Temperature
Compensation
  automatic (with Pt100 probe) or manual from -9.9 to 120°C
Outputs   digital: RS232 bi-directional optoisolated; or analog, galvanically isolated: 0-1 mA, 0-20 mA and 4-20 mA, 0-5 VDC, 1-5 VDC and 0-10 VDC
Set Point Relay   1 or 2 contact outputs SPDT 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected (2A, 250V fast fuse)
Alarm Relay   1 contact output SPDT, 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected (2A, 250V fast fuse)
Power Supply   115 VAC ±10% or 230 VAC ±10%; 50/60 Hz
Power Consumption   15 VA
Over Current
Protection
  5A 250V fast fuse
Max Oscillation
Frequency
  4 MHz
Environment   0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions   panel cutout: 140 x 140 mm, instrument: 144 x 144 x 170 mm
Weight   1.6 kg (3.5 lb.)
Ordering Information   Each pH 500 model is supplied complete with mounting brackets and instructions.


 

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