Specifications.

• *Range: 0-14pH
• *Resolution: 0.01pH
• *Accuracy: 0.05pH
• *Display: 3.5 digit LCD
• *Calibration: Stored in non-volatile memory
• *Electrode: BNC, external of housing
• *Signal Output: Isolated 4-20mA, software configured over 0-14pH range
• *Control Range: Setpoint range from 0-14pH
• *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 secs
• *Alarm Relay: 240VAC @5Amps max. resistive, potential free contacts
• *Power: 240VAC 50Hz 7VA max.
• *Enclosure: Thermoplastic with transparent lid, IP55 rated
• *Dimensions: 130(W)mm x 95(H)mm x 85(D)mm

Features.

The new PPH-1 pH controller features a simple and safe 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, current signal low and high points etc.

Dual coloured LED’s show the operational status of the instrument or setup program currently available. You scroll through setup menus with the encoder knob and once a menu is selected values are then increased or decreased by rotating the encoder knob clock- or anticlockwise. The desired value is selected and saved with the momentary push switch. The rotary encoder only becomes active if invoked through the instrument configuration program. This feature avoids setpoints or calibration values being changed inadvertently.

The PPH-1 features 1 output relay with switched 240VAC. This output can be configured for up/down dosing in on/off mode, proportional dosing or adaptive proportional dosing.
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 pH in adaptive proportional mode. This makes for a fully dynamic dosing control which adapts for widely varying conditions in industrial plant installations.
The alarm relay has potential free contacts. The adjacent 240VAC terminal assists wiring if a 240VAC alarm output is required. A low and high setpoint can be selected for the alarm relay. This output can also be used for an additional setpoint if required.

The isolated 4-20mA signal output is configured via the program. 4mA can be configured between pH0.00 to pH7.00 20mA is configured between pH7.00 and pH14.00 Minimum slope for the signal output however is pH7.00.

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

Wiring the PPH-1 is easy. Simply remove the front panel to reveal the terminals. The output relay provides 240VAC with active, neutral and earth. A pump or valve can be wired directly without the need for additional junction terminals.

PPH-1 Brochure

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PPH-1 Manual

(795Kb)