The PTX series fully programmable totalizers and rate indicators for flow measurement are available in two models:

• PTX800A for analog current/voltage flow-rate signals
• PTX800D for flowmeters with digital pulse outputs.

You can set the basic display units for total or rate indication, then simply hold down the ‘rate/total’ button to check the other value. Both models are also available with optional alarm relays for monitoring and simple batching control and/or an isolated analogue output for retransmission. The display can be scaled in flow units per second, per minute, per hour or per day with the precision required for the application. The totalized flow can be scaled by a factor of 0.001, 0.01, 0.1, 1 10, 100 or 1000 to provide the most convenient display for the application.

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The PTX800A accepts rate signals in standard current/voltage format. It has low-cut out and linearization for square law devices and has a 24Vdc supply for power active input devices.

The PTX800D accepts NPN, PNP, Namur, Voltage pulse, contact closure or a.c. input. The instrument will accept any periodic waveform and totalize the pulses in meaningful engineering units. It also calculates the resultant flow-rate. The input circuit incorporates a comparator with several reference levels and hysteresis settings all switched via software to make set-up as simple and flexible as possible. A 12Vdc supply is provided for powering proximity sensors and other active input devices.

Features:

Display total or rate in any engineering unit Bright 8 digit LED display Up to 2 alarm channels Optional analog output Pulse output Remote or local reset for batching Last count retention in case of power failure AC or DC powered

Fully Isolated LED alarm status indication 1/8 DIN standard facia with IP65 rating Integral power supply for active input devices Easy to use Change configuration without need to recalibrate No internal adjustments needed

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