Introduction; Repairs; Safety Information - Ecom MA 400 Operating Instructions Manual

1. Introduction

The MA 400 is designed to be a complete 4 to 0mA current calibrator for both troubleshooting
and calibrating current loops. Very high accuracy combined with several unique features makes the
MA 400 an easy to use and highly flexible calibration tool.
The MA 400 can source, simulate (-wire) or measure loop currents up to 4mA. It can also measure
process signal voltages up to 8VDC with the same 0.015% of reading accuracy. A digital knob user
interface combined with decade output control allows the user to make both large or small output
changes with ease.
Several unique functions such as the autostep/ramp modes allow the MA 400 to test valve
actuators for smoothness and proper operation. The MA 400 can also power two-wire transmitters
while simultaneously reading the resultant loop current. All readings are displayed in both milliamps
and % of span.

1.1 Repairs

Repair work is subject to the nationally valid regulations and directives. We therefore recommend that
such work be performed by ecom instruments GmbH, Germany, as all repairs must be examined to
ensure functional safety.

1.2 Safety information

These operating instructions contain information and safety regulations that must be followed to ensure
safe and reliable operation of the unit under the described conditions. Failure to follow the information
and instructions can have dangerous consequences or may contravene applicable regulations. Please
take the time to carefully read through the owner's manual before you start using the unit. In the event
of any doubt or discrepancies (e.g. due to translation or printing errors), the German version of these
operating instructions shall govern.
Symbols Used
The following table lists the International Electrical Symbols. Some or all of these symbols may be used
on the instrument or in this manual.
Symbol Description
AC (Alternating Current)
AC-DC
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