Specifications.

• *Range: 0-1000mV
• *Resoulution: 1mV
• *Accuracy: 2mV
• *Calibration: Stored in non-volatile memory
• *Electrode: BNC, external of housing
• *Signal Output: Isolated 4-20mA, software configured over 0-1000mV range
• *Control range: Setpoint range from 0-1000mV
• *Hysteresis: Programmed at 10mV
• *Output Relay: 240VAC @5Amps max. resistive, fused, configured for either dosing up or down
• *Pulsed Output: Adaptively adjusts pulse width from continuously ON to min. of 1.5 secs each 60 second interval
• *Alarm Relay: 240VAC @5Amps max. resistive, potential free contacts
• *Power: 240VAC 50Hz &VA max.
• *Enclosure: Thermoplastic with transparent lid, IP55 rated
• *Dimensions: 130(W)mm x 95(H)mm x 85(D)mm

Features.

The new PMV-1 mV/ORP controller features an easy way for all configuration and calibration procedures. All programmed parameters are stored in non-volatile memory and are not lost if the instrument looses power. The ‘rotary encoder knob’ is used to scroll through setup menus and dial up/down values when prompted to enter values for relay or alarm setpoints etc.

The large LCD display shows signal input, configuration and calibration menus or values (set point etc.) to be configured. Dual coloured LED’s show the operational status of the instrument or setup program currently available.

The relay output is controlled through a complex algorithm that continuously monitors the difference between actual mV and set point. The output starts to pulse and varies the ON/OFF cycle as the mV input approaches the set point value. The ON/ OFF cycle however is also adjusted from a ‘correction factor’.
Dosing for an excessive period of time without a corresponding increase in mV is recognized as a possible failure. The output begins to pulse, preventing a gross overdosing. The pulse output exhibits a very wide duty cycle. The relay output pulse varies from continuously ON, to 1.5 sec ON and 60sec OFF in proportional mode. The ON/OFF times lengthen or shorten depending on the rate of change of mV in adaptive proportional mode.
This makes for a fully dynamic dosing control which adapts for widely varying conditions in industrial plant installations. Low and high setpoints can be selected for the alarm relay. This relay may also be used as an additional set point.

The 4-20mA output range is setup via the program.

A flow switch input locks out the relay output. This input can be configurerd for normally open or normally closed. (N/O or N/C).

Wiring the PMV-1 is easy. Simply remove the front panel to reveal the terminals. The output relay provides switched 240VAC.

PMV-1 Brochure

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PMV-1 Manual

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