Ametek mAcal Operating Manual

User manual

mA Loop Calibrator

Jofra mAcal

User Manual

mAcal

mA loop Calibrator

 Copyright 2005 AMETEK DENMARK A/S

LIST OF CONTENTS

1.

INTRODUCTION

1.1 PACKING LIST ................................................................................ 2

2. SAFETY INSTRUCTIONS .................................................... 2

3. OPERATION ........................................................................ 4

3.1 DISPLAY AND KEYBOARD ........................................................... 4

3.2 SWITCHING THE MA

3.3 HOW THE CURRENT IS GENERATED .......................................... 6

3.4 HOW THE CURRENT IS MEASURED ............................................ 7

3.5 HOW THE VOLTAGE IS MEASURED ............................................ 7

3.6 HOW NEW PARAMETERS ARE SELECTED (SETUP) ................ 8

3.6.1 S

3.6.2 S

3.6.3 S

3.6.4 S

3.6.5 S

ELECTION OF
ELECTION OF
ELECTION OF
ELECTION OF
ELECTION OR DE-SELECTION OF AUTOMATIC

CAL

ON/OFF .................................................. 6

MODE .......................................................... 8

SLOPE TIME................................................ 8

STEP SIZE ................................................... 9

STEP TIME .................................................. 9

OFF

FUNCTION

9

4. ERROR SITUATIONS ........................................................ 10

4.1 TEST FOR “OPEN LOOP” ........................................................... 10

4.2 TEST FOR INCORRECT POLARITY ............................................ 10

4.3 TEST FOR “OVERRANGE”.......................................................... 10

4.4 INDICATION OF BATTERY STATUS ........................................... 11

5. HOW mAcal IS ADJUSTED (service mode) .................... 12

6. TECHNICAL SPECIFICATIONS (23°C±3°C) .................... 14

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1. INTRODUCTION
The mAcal is a loop calibrator for measuring and generating mA. The

mAcal is specially designed for use in industrial plants with 4-20mA
signals. The mAcal can be operated with one hand, and operation is simple

and intuitive.

1.1 PACKING LIST

When the instrument is received, the box should contain the following:

• mAcal

• Bag

• 2 test leads with crocodile clip

• 4 batteries, type LR6, AA

• 1 USB key containing documentation

2. SAFETY INSTRUCTIONS

Read this manual carefully before using the instrument!

In order to avoid any personal injuries and/or damage to the instrument
all safety instructions and warnings must be observed.

Disposal – WEEE Directive
These calibrators contain Electrical and Electronic circuits and must be

recycled or disposed of properly (in accordance with the WEEE
Directive 2012/19/EU).

WARNING:

• The calibrator must not be used for any purposes other than those
described in this manual.

• Follow all equipment safety procedures.

• The calibrator has been designed for interior use only and should

not be used in hazardous areas, where vapour or gas leaks, etc.
may constitute a danger of explosion.

• Do not apply more than the rated voltage. See specifications for
supported ranges.

• Do not use the calibrator if it is damaged. Before you use the
calibrator, inspect the case. Look for cracks or missing plastic. Pay

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