Comeco logo

Advantages

  • Input signal from SENSOREX, INGOLD, or compatible probes
  • Temperature compensation input
  • Built-in source for probe polarization voltage
  • Rechargeable battery for probe polarization voltage
  • Standard current or voltage output signal
  • Isolated current output available
  • Polarization-control front-panel switch

Description

PHO2 is an electronic transmitter of dissolved-oxygen measurements. It transforms the signal from a standard INGOLD® or SENSOREX® probe for dissolved O2 or a compatible one, provides the polarization voltage necessary for the INGOLD probe operation, and performs measurement temperature compensation. A built-in rechargeable battery maintains INGOLD probe polarization even in absence of power supply, while a front-panel switch enables turning the polarization voltage off. The PHO2 transducer provides a standard voltage or current output signal that allows connection of any standard control, data logging, or indication device, with its field of application including the biotechnological, chemical, food, etc. industries as well as research.

Additional information

Захранване

115 VAC, 12…24 V, isolated, 230 VAC, 24 VAC, isolated

Аналогов вход

0…50 mV DC linear voltage, O2 input

Аналогов изход

0…2 V, 0…20 mA, 4…20 mA, Other

Монтаж

On panel

Корпус

96x48x107 mm

PHO2 transmitter

Carbon Dioxide

Technical Specifications
Input
Variant‘A’‘B’
Input signal0…50 mV0…67 nA
Dissolved O2 input range0% (pure N2) … 100% (normal air)0% (pure N2) … 100% (normal air)
Temperature compensation inputinternal, 0…50 °Cexternal NTC 22 kΩ, 0…70 °C
Polarization voltage675 mV DC
Accuracy
Measurement error< ± 1% from span
Repeatability< ± 1% from span
Temperature drift0.01% from span for 1 °C
Response time< 30 s (at change 0…95%)
Polarization voltage (1)< ± 0.1 mV
Output
Transmission range0…100%, 0…200% or 0…300%
Output signal4…20 mA0…20 mA0…2 V
Input / output isolation (option)1500 VAC for 1 minnonenone
Minimum output load20 kΩ
Maximum output load350 Ω at 20 mA350 Ω at 20 mA
Power supply
Mains supply voltage230 VAC or 115 VAC
Isolated low voltage12…24 V or 24 VAC
Consumptionmax. 2 VA
Polarization rechargeable battery (1)3,6 VDC
Rechargeable-battery service life (1)min. 3 years
Operating conditions
Ambient temperature0…55 °C
Ambient humidity10…85 %RH

 

Design and materials
Case materialplastic
Mountingin 90×42 mm panel cut-out
Wiringplug-in terminals
Dimensions96×48(front)x107 mm
Mounting depth98 mm
Weightmax. 400 g
Protection, front/terminalsIP54 / IP20
Increased front IP (option)IP65

(1) With INGOLD® probes only!