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

Portacal 275:  Handheld Signal Source and Loop Calibrator

The Portacal 275 is an accurate handheld signal source and loop tester for milliamp, millivolt and voltage signals. It can be used in four modes to suit most current/voltage calibration requirements.

The modes are: Voltage source, which simulates auxiliary powered transmitters with proportional voltage outputs; Millivolt source, which simulates many common plant based signals; Current source, which simulates auxiliary powered transmitters with proportional current outputs; Current sink, which simulates 2-wire (loop powered) transmitter outputs.

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The Portacal 275 has an accurate lockable dial scaled in 0.1% increments from 0 to 100%. By using the dial in combination with the output value switch, you can quickly and accurately (typically within ±0.25%) dial up any signal value in the field without a digital meter for indication. For more accurate bench work (to within ±0.1%), test points are provided for multimeter connection.

Features:

Compact, handheld and light Simulates loop powered transmitter operation LEDs to indicate source/sink operating mode 0-20mA / 4-20mA current ranges 0-5V / 1-5V / 0-200mV voltage ranges

0.1% accurate current source Test points for current output monitoring Switch select 0%, 100% or variable output Powered from two PM3 9V batteries Precision lockable 10-turn dial for variable signal output

Portacal 1000:  Current/Voltage Instrument Calibrator

The Portacal 1000 is a microprocessor based calibrator for milliamp and voltage signals.  It has three output (transmitter simulation) modes: Voltage source, for simulating auxiliary powered transmitters with voltage outputs Current source, for simulating auxiliary powered transmitters with proportional current outputs Current sink, for simulating 2-wire (loop powered) transmitters.

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For each of these modes the most commonly used calibration points are available by pressing one key. There are also nine storage locations for each mode, which you can use to store and recall values that you often use.

You can also program the instrument to repeatedly ramp or step between up to nine stored values in any mode. The values are selected from the stored values and you specify how many values to use and how long (in seconds) between each change.

The signal measuring modes allow you to test or calibrate voltage outputs; current outputs or 2-wire transmitter outputs. When testing a 2-wire (loop powered) transmitter output, the Portacal 1000 also provides power for the device.
 

Features:

Complete diagnostic tool for current/voltage instruments Measures and simulates voltage and current signals Tests and measures loop powered transmitter operation Continous stepping and ramping functions Simulates auxiliary powered and loop powered transmitter operation

Better than 0.05% accuracy in all modes Light and portable Works off NiCd batteries or ordinary alkaline batteries Audible keyclick

The Portacal 1000 is cULus Listed, CE Approved and complies with the RoHS directive for hazardous materials reduction.

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