3621

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3621/3631

3621/3631

  • Easy to install 1/8 DIN plastic casing.
  • Clear LCD displays pH, mV or temperature with backlight.
  • Universal power supply input from 100-240VAC.
  • Automatic buffer recognition of US and NIST buffer sets. Calibrated data is stored in memory and ready to for use on power up.
  • Automatic or manual temperature compensation.
  • Displays absolute and relative ORP.
  • Two sets of programmable on/off relays for pH or ORP (3621).
  • Isolated and reversible 4-20mA current output for pH or ORP allows it to be used as a proportional output (3631).
  • RoHs compliant.

Specifications

 

Range

Resolution

Accuracy

pH

-2.00 to 16.00 pH

0.01pH

± 0.1 %±1 digit

ORP

-1999.9 to 1999.9mV

1 mV/0.1mV

± 0.1 %±1 digit

Temp

-10.0 to 120.0 °C

0.1 °C

± 0.3°C

General

  • pH buffer recognition: US(4.01,7.00,10.01) or NIST(4.00,6.86,9.18) user selectable
  • pH Electrode Offset Recognition: ± 100mV at pH 7.00 /-91.7mV to 108.3mV at pH 6.86
  • pH Electrode Slope Recognition: ±30% at pH 4.00 , 4.01, 9.18 or 10.01
  • Temp Compensaton: Auto /manual -10.0 to 120.0 °C(Thermistor , 10K ohm /PT-1000)
  • Input impedance : >10(exp)13 ohms
  • Input Select: User selectable pH or ORP
  • Control Type / Relay Output(3621): 2 ON/OFF controls /5A at 115V AC or 2.5A at 220V AC ,resistive load only
  • Current Output Range /Scale(3631): 4 to 20mA(isolated) / Liner
  • Maximum Load: 500 ohm
  • Isolation Voltage:500 VDC
  • Display: LCD with backlighting
  • Power :100 to 240 VAC at 50/60 HZ
  • Ambient Temperature Range: From 0 to 50 °C
  • Case: 1/8 DIN case , 90mm depth