To complement the Mann series there are calibrators specifically designed for the instrument engineer.
 

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.

Select to view Technical Data

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.

Select to view Technical Data

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.

top back