Gossen Metrawatt SECULIFE HIT AM User manual

Operating Instructions

SECULIFEHITAM HITMD

METRAHIT AM BASE, AM PRO, AM TECH, AM XTRA
METRAHIT X-

Advanced Multimeters / Special Multimeters

TRA OUTDOOR TECH PRO BASE

3-349-352-03

14/5.18

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Standard Equipment Contact Persons

1kHz

1kHz

1kHz

1kHz

1kHz

1kHz

1kHz

1kHz

Standard Equipment

Function

1multimeter
1 measurement cable set
2 batteries
1 DAkkS calibration certificate
1 abbreviated operating instructions
–

Function

V AC / Hz TRMS
(Ri  9 M)

V AC TRMS
(Ri = 1 M)

V AC+DC TRMS
(Ri  9 M)

V DC (  9 M) 

... 1 MHz 5 V AC
Duty cycle as % ———

Hz (V AC) ... 100 kHz ... 100 kHz ... 100 kHz ... 100 kHz ... 100 kHz

Bandwidth V AC

A AC / Hz TRMS

A AC+DC TRMS —

A DC —

Fuse 10 A/1000 V 10 A/1000 V 10 A/1000 V 10 A/1000 V —

Transformation
factor

A AC / Hz
TRMS

A AC+DC

S

TRM

2 GMC-I Messtechnik GmbH

SECULIFE
HITAM/HIT

M687A/M687B M240A/M240O

&Filter&Filter&Filter&Filter

&Filter&Filter&Filter&Filter

15 Hz ... 20 kHz 15 Hz ... 20 kHz 15 Hz ... 10 kHz 15 Hz ... 10 kHz

100 A

1/10/100 mA
1 A / 10 (16)

METRAHIT

MD

AM XTRA
X-

TRA

OUTDOOR







———

100 A

1/10/100 mA
1 A / 10 (16)

A

——  — 

——

——

METRAHIT
AM TECH

/

ECH

T

M243A M242A M241A

10/100 mA

1 A / 10 (16)

A

A

mV/A
mA/A

mV/A
mA/A

METRAHIT
AM PRO

RO

P

1 A / 10 (16)

A

—

—

METRAHIT
AM BASE
B

ASE



—

15 Hz ... 1 kHz

—

mV/A

Ri = 1 M

mV/A

Ri = 1 M

A DC

Hz (A AC) ... 30 kHz ... 30 kHz ... 30 kHz ... 30 kHz ... 30 kHz
Resistance 
Continuity 
Diode ... 5,1 V 
Temperature TC (K) 

Temperature RTD
Capacitance ——
MIN/MAX/data hold 

4 MBit memory
IR Interface ———

Power pack
adapter socket

Protection

Antimicrobial
properties

Measuring
category

Rubber holster ———

Measurement cable
set

DAkkS calibr. certifi­cate

Hygiene Expertise — /  ————

1)

For 15,400 measured values, sampling rate adjustable from 0.1 second to 9 hours

SECULIFE
HITAM/HIT

M687A/M687B M240A/M240O

1)

600 V CAT II I
300 V CAT IV

KS17-2AMB/

KS17-2

METRAHIT
AM XTRA

MD

X-

TRA

OUTDOOR

——

———

———

———

IP65

/ —————

X-TRA: IP52

OUTDOOR:

1000 V CAT III

600 V CAT IV

KS17-2 KS17-2 KS17-2 KS17-2



METRAHIT
AM TECH

/

ECH

T

M243A M242A M241A

mV/A
mA/A

IP65

IP52 IP52 IP52

1000 V CAT III

600 V CAT IV

METRAHIT
AM PRO

RO

P

—

1000 V CAT II I

600 V CAT IV

METRAHIT
AM BASE
B

ASE

mV/A

Ri = 1 M

1000 V CAT III

600 V CAT IV

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Table of Contents

Contents Page Contents Page

1 Safety Features and Precautions ....................................... 8

1.1 Use for Intended Purpose ................................................................10

1.2 Meanings of Danger Symbols ..........................................................10

1.3 Meanings of Acoustic Warning Signals ............................................10

2 Operating Overview – Connections, Keys, Rotary Switch, Symbols . 12

3 Initial Start-Up .................................................................. 16

3.1 Inserting Batteries or Rechargeable Batteries ...................................16

3.2 Activation .......................................................................................16

3.3 Setting the Operating Parameters ....................................................16

3.4 Switching the Instrument Off ...........................................................17

4 Control Functions ............................................................. 18

4.1 Selecting Measuring Functions and Measuring Ranges .....................18

4.1.1 Automatic Range Selection .............................................................18

4.1.2 Manual Measuring Range Selection .................................................18

4.1.3 Quick Measurements ......................................................................19

4.2 Zero Offset / Relative Measurements ...............................................19

4.3 Display (LCD) .................................................................................20

4.3.1 Digital Display ................................................................................20

4.3.2 Analog Display ...............................................................................20

4.4 Measured Value Storage: DATA (auto-hold / compare) ......................21

4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function ............22

4.5 Measurement Data Recording (METRAHIT AM XTRA / X-

TRA /

OUTDOOR and SECULIFEHITAM/MD only) ...........................................23

5 Measurements ................................................................. 26

5.1 Voltage Measurement .....................................................................26

5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC) .....27

5.1.2 Alternating Voltage Measurement with 1 M

Load Resistance

W

and Frequency Measurement with Selectable Low-Pass Filter
(METRAHIT AM X-TRA / AM TECH / AM PRO / X-

ECH / PRO / SECULIFEHITAM/MD only) ............................................28

T

TRA / OUTDOOR /

5.1.3 Alternating Voltage and Frequency Measurement V AC and Hz
with Selectable Low-Pass Filter
(METRAHIT AM X-TRA / AM TECH / AM PRO / X-

TRA / OUTDOOR /

TECH / PRO / SECULIFEHITAM/MD only) ............................................30

5.1.4 Frequency and Duty Cycle Measurements
(

METRA HIT AM XTRA

/ X-

TRA

/

O

UTDOOR

/

SECULIFE HITAM/MD only) .... 32

5.2 Resistance Measurement,  ..........................................................33

5.3 Continuity Test ..............................................................................34

5.4 Diode Testing with a Constant Current of 1 mA ...............................35

5.5 Temperature Measurement ............................................................36

5.5.1 Measurement with Thermocouples, Temp TC ..................................36

5.5.2 Measurement with Resistance Thermometers

METRA HIT AM XTRA

(

5.6 Capacitance Measurement (

O

UTDOOR

/

SECULIFE HITAM/MD and

/ X-

TRA

/

O

UTDOOR

METRA HIT AM XTRA

METRAHIT AM TECH

/

SECULIFE HITAM/MD only) .... 37

/ X-

TRA

/

/

T

ECH

only) .. 38

5.7 Current Measurement ....................................................................39

5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC) (METRAHIT AM X-TRA / AM TECH / AM PRO /

TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only) ................. 40

X-

5.7.2 Alternating Current and Frequency Measurement, Direct Connection,
A AC and Hz (METRAHIT AM X-TRA / AM TECH / AM PRO /

TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only) ................. 41

X-

5.7.3

Direct and Pulsating Current Measurement with Clip-On Current Sensor,
A DC and A (DC+AC) (

METRAHITAM BASE / B

METRAHIT AM TECH / TECH and

ASE

only) ...................................................... 42

6 GMC-I Messtechnik GmbH

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Table of Contents

Contents Page Contents Page

5.7.4

Alternating Current Measurement with Clip-On Current Sensor
A AC and Hz (

B

ASE

5.7.5

Direct, Pulsating and Current Measurement
Transformer A DC, A (DC+AC), A AC and Hz (METRAHIT AM TECH /

ECH only) ...................................................................................... 44

T

METRAHIT AM TECH

only) ............................................................................................43

/

T

ECH

and

METRAHITAM BASE

with Clip-On Current

/

6 Device and Measuring Parameters ................................... 46

6.1 Paths to the Various Parameters .................................................... 47

6.2 List of All Parameters ....................................................................47

6.3 Querying Parameters – InFo Menu (as moving letters) ...................... 48

6.4 Entering Parameters – SETUP Menu ............................................... 48

6.5 Default Settings ............................................................................. 50

7 Interface Operation (METRAHIT AM XTRA / X-TRA / OUTDOOR /

SECULIFEHIT

7.1 Activating the Interface ................................................................... 52

7.2 Configuring Interface Parameters .................................................... 53

AM/MD only) ................................................... 52

8 Technical Data ................................................................54

9 Maintenance and Calibration ............................................ 62

9.1 Displays – Error Messages ............................................................ 62

9.2 Batteries ....................................................................................... 62

Fuse (

9.3

9.4 Housing Maintenance .................................................................... 64

9.5 Return and Environmentally Sound Disposal ....................................64

9.6 Recalibration ................................................................................. 65

METRAHIT AM XTRA

TECH, METRAHIT AM PRO

/

X-TRA

/

OUTDOOR, METRAHIT AM TECH

/

PRO

and

SECULIFEHITAM/MD

only) .........63

/

9.7 Manufacturer’s Guarantee .............................................................. 65

10 Accessories ....................................................................... 66

10.1 General ......................................................................................... 66

10.2 Technical Data for Measurement Cables ......................................... 66

10.3 NA X-TRA Power Pack (not included) .............................................. 66

Interface Accessories for

10.4

SECULIFEHITAM

METRAHIT AM XTRA

and

SECULIFEHITMD

/

X-TRA

/

OUTDOOR

,

(not included) ......................... 67

11 Index ................................................................................. 68

GMC-I Messtechnik GmbH 7

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Safety Precautions

1 Safety Features and Precautions

You have selected an instrument which provides you with a high
level of safety.

This instrument fulfills the requirements of applicable EU guide­lines and national regulations. We confirm this with the CE mark­ing. The relevant declaration of conformity can be obtained from
GMC-I Messtechnik GmbH.

The TRMS digital multimeter has been manufactured and tested
in accordance with the following safety regulations:
IEC 61010–1:2010/DIN EN 61 010–1:2011/VDE 0411–1:2011.
When used for its intended purpose (see page 10), safety of the
operator, as well as that of the instrument, is assured. Their safety
is however not guaranteed, if the instrument is used improperly or
handled carelessly.

In order to maintain flawless technical safety conditions, and to assure
safe use, it is imperative that you read the operating instructions
thoroughly and carefully before placing your instrument into service,
and that you follow all instructions contained therein.

The multimeter is equipped with an automatic socket blocking
mechanism for your safety, and in order to safeguard your
instrument. This mechanism is linked to the rotary switch and only
allows access to those jacks which are actually required for the
selected function. It also prevents the user from turning the rotary
switch to impermissible functions after the measurement cables
have already been plugged in.

Measuring Categories and their Significance per IEC 61010-1

CAT Definition

Measurements in electrical circuits

I

which are not directly connected to the mains:

for example electrical systems in motor vehicles and aircraft, batteries etc.

Measurements in electrical circuits

II

which are electrically connected to the low-voltage mains:

with plugs, e.g. at home, in the office or laboratory etc.

Measurements in building installations:

III

stationary power consumers, distributor terminals, devices connected
permanently to the distributor

Measurements at power sources for low-voltage installations:

IV

meters, mains terminals, primary overvoltage protection devices

The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, for
example 1000 V CAT II I.

For the application of measuring cables see chapter 10.2.

Observe the following safety precautions:

• The multimeter may not be used in potentially explosive
atmospheres.

• The multimeter may only be operated by persons who are ca­pable of recognizing contact hazards and taking the appropriate
safety precautions. Contact hazards according to standard
exist anywhere, where voltages of greater than 33 V RMS or
70 V DC may occur. Avoid working alone when taking meas­urements which involve contact hazards. Be certain that a sec­ond person is present.

• Maximum allowable voltage between the voltage measuring
terminals, and between all connections and earth is 1000 V for
measuring category III, or 600 V for measuring category IV.

Exception SECULIFE HIT

AM/HITMD: 600 V CAT III and 300 V CAT IV.

8 GMC-I Messtechnik GmbH

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Safety Precautions

• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.

• Make certain that the measurement cables are in flawless
condition, e.g. no damage to insulation, no interruptions in
cables or plugs etc.

• No measurements may be made with this instrument in
electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be pres­ent.

• Measurements under moist ambient conditions are not
permitted.

• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in chapter 8, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the “Over­load Capacity” column.

• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous currents and voltages are
otherwise not indicated, and the instrument may be damaged.

• The instrument may not be operated if the fuse cover or the
battery compartment lid has been removed, or if its housing is
open.

• The input for the current measuring range is equipped with a
fuse link (exception: METRAHIT AM BASE / B
Maximum permissible voltage for the measuring circuit (= rated
voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only (see page 59)! The fuse must have a

breaking capacity of at least 30 kA.

ASE).

Opening of Equipment / Repair

The equipment may be opened only by authorized service per­sonnel to ensure the safe and correct operation of the equipment
and to keep the warranty valid.

Even original spare parts may be installed only by authorized ser­vice personnel.

In case the equipment was opened by unauthorized personnel,
no warranty regarding personal safety, measurement accuracy,
conformity with applicable safety measures or any consequential
damage is granted by the manufacturer.

Repair and Parts Replacement

When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measur­ing circuit before the performance of repairs or the replacement of
parts. If repair of a live open instrument is required, it may only be
carried out by trained personnel who are familiar with the dangers
involved.

Defects and Extraordinary Strains

If it may be assumed that the instrument can no longer be
operated safely, it must be removed from service and secured
against unintentional use.
Safe operation can no longer be relied upon:

• If the device demonstrates visible damage

• If the instrument no longer functions, or if malfunctioning
occurs

• After long periods of storage under unfavorable conditions,
e.g. humidity, dust or extreme temperature (see “Ambient Con­ditions” on page 60)

GMC-I Messtechnik GmbH 9

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Safety Precautions

!

1.1 Use for Intended Purpose

• The respective multimeter is a portable device which can be
held in the hand during the performance of measurements.

• Only those types of measurements described in chapter 5 may
be performed with the measuring instrument.

• The measuring instrument, including measurement cables and
plug-on test probes, may only be utilized within the specified
measuring category (see page 59 and the table on page 8
regarding significance).

• Overload limits may not be exceeded. See technical data on
page 54 for overload values and overload limits.

• Measurements may only be performed under the specified
ambient conditions. See page 60 regarding operating temper­ature range and relative humidity.

• The measuring instrument may only be used in accordance
with the specified degree of protection (IP code) (see page 60).

1.2 Meanings of Danger Symbols

Warning concerning a point of danger
(attention: observe documentation!)

Warning concerning dangerous voltage at the measurement
input: U > 55 V AC or U > 70 V DC

1.3 Meanings of Acoustic Warning Signals

Voltage warning: > 1000 V (intermittent acoustic signal)

Current warning: > 10 A (intermittent acoustic signal)

Current warning: > 16 A (continuous acoustic signal)

10 GMC-I Messtechnik GmbH

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Operating Overview – Connections, Keys, Rotary Switch, Symbols

* METRAHIT AM BASE / BASE:

Current measurement by means of clip-on current sensor with voltage output only

1

3

4

16

5

6

9

*

*



chapter 4.3

chapter 3
chapter 5

chapter 7

chapter 6



chapter 3

ff.

chapter 3

14

12



chapter 4.1

10

2



chapter 4.1.2

15

8

12

15

chapter 4.1 

chapter 4.4

chapter 6

chapter 3

chapter 3.1



7



chapter 1.2

chapter 6

max. 1000 V ! / SECULIFE HITAM & MD: max. 600 V !

2

Operating Overview – Connections, Keys, Rotary Switch, Symbols

1 Display (LCD) (see page 13 for significance of symbols)
2 MAN / AUTO shift key for manual/automatic measuring range selection

 Increase parameter values

Operating mode menu:

3

ON / OFF | LIGHT

key for switching device and display illumination on and off

Select individual menu entries against direction of flow

4 FUNC | ENTER multifunction key

Operating mode menu: Acknowledge entry (ENTER)

5 

Increase measuring range or move decimal point to the right (MAN function)

6

Rotary switch

for measuring functions, (see page 15 for significance of symbols)
7 DAkkS calibration mark
8 Connector socket for ground
9 Connector socket for current measurement with automatic blocking

10 Connector socket for voltage, resistance, temperature, diode

capacitance measurement (

METRAHIT AM TECH / TECH and

METRAHIT AM XTRA / X-

TRA

SECULIFEHITAM/MD only) with automatic

/ O

UTDOOR

blocking

11 DATA / MIN / MAX

Key for freezing, comparing and deleting measured value, and for Min/Max

 Decrease values

Operating mode menu: Select individual menu entries in direction of flow

12 MEASURE | SETUP

Key for switching back and forth between measuring and menu function

13 ZERO | ESC

Key for zero balancing
Operating mode menu: Exit current menu level and return to a higher

12 GMC-I Messtechnik GmbH

14 Decrease measuring range or move decimal point to the left (MAN function)
15 Connector for power pack *
16 Infrared interface *

* METRAHIT AM XTRA / X-TRA / OUTDOOR / SECULIFEHITAM/MD only

level, exit parameters configuration without
saving data

and

,

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Symbols Used in the Digital Display 1 Battery level indicator

1 2910

12

14

15

15
16

20 17

22

23

765

1921

8

3

12

18

24

4

Battery full

Battery OK

Battery weak

Battery (almost) dead, U < 1.8 V

METRAHIT AM XTRA / X-TRA / OUTDOOR and
SECULIFEHITAM/MD:

Active data transmission to /  from multimeter

IR interface in stand-by mode
(ready to receive starting commands)

Battery level indicator

Interface indicator

GMC-I Messtechnik GmbH 13

Operating Overview – Connections, Keys, Rotary Switch, Symbols

2 ON: continuous operation (automatic shutdown deactivated)
3 MAN: manual measuring range selection is active
4 Digital display with decimal point and polarity display
5 max/min: Min/Max value storage
6 DATA: display memory, “freeze” measured value
7 STORE: memory mode active, with METRAHIT AM XTRA / X-

UTDOOR and SECULIFE HITAM/MD only

O

8 ISO: no function here
9 Transformation factor (current clip factor), with METRAHIT AM BASE /

ASE and METRAHIT AM TECH / TECH only

B

10 IR: infrared interface display, with METRAHIT AM XTRA /

X-TRA / OUTDOOR and SECULIFEHITAM/MD only

11 Scale for analog display
12 Pointer for analog display (bar graph – pointer)

depending upon setting in SET menu for the A.diSP parameter

Triangle appears: indicates overranging
13 Diode measurement selected
14 Selected type of current
15 TRMS measurement
16 Pt100(0): selected platinum resistance thermometer with

automatic recognition of Pt100/Pt1000, with METRAHIT AM XTRA /

TRA / OUTDOOR and SECULIFEHITAM/MD only

X-

17 Type K: temperature measurement with type K (NiCr-Ni) thermocouple
18 sec (seconds): unit of time
19 REL: relative measurement with reference to offset
20 Unit of measure
21 ZERO: zero balancing active

22 Warning regarding dangerous voltage: U > 55 V AC or U > 70 V DC

23 Continuity test with acoustic signal is active
24 h (hours): unit of time

TRA /

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Operating Overview – Connections, Keys, Rotary Switch, Symbols

1kHz

1kHz

1kHz

1kHz

V

ACDC

V

AC

2

V

DC

2

+=

A

AAA

Symbols of Rotary Switch Positions

Switch

V~ 0/4 V~ AC TRMS Alternating voltage, TRMS AC, full bandwidth 
Hz (V) 1 Hz ~ AC Voltage frequency, full bandwidth 
V~ 2 V Fil ~ AC TRMS Alternating voltage, TRMS AC, with low-pass (1 kHz) —
Hz (V) 3 Hz Fil ~ AC Voltage frequency, with low-pass (1 kHz) —
V~ 1 M
V~ 1 V Fil ~ AC TRMS Alternating voltage, TRMS AC, up to 1 kHz, input 1 M—
Hz (V) 2 Hz Fil ~ AC Voltage frequency, up to 1 kHz, input 1 M—
Hz (V) 1 M
V 0/2 V DC Direct voltage 
V 1 V DC AC TRMS Pulsating voltage, TRMS ( ) 
MHz 0/2 MHz (High) frequency @ 5 V~  ———
% 1 % Duty cycle @ 5 V~  ———



Temp TC 0/2
Temp RTD 1 C Pt100/1000 Temperature with resistance thermometer Pt100/Pt1000  ———

A 0/2 A DC Direct current value —
A 1 A DC AC TRMS Pulsating current value, TRMS AC DC —
A~ 0/2 A~ AC TRMS Alternating current value, TRMS AC —
Hz (A) 1 Hz ~ AC Current frequency —

Hz ( ) 1 Hz ~ AC Current frequency —  — 

FUNC

Display Measuring Function METRAHIT

AM XTRA
X-

TRA

O

UTDOOR

SECULIFEHIT

AM/MD

METRAHIT
AM TECH
T

ECH

METRAHIT
AM PRO
P

RO

METRA HIT
AM BASE
B

ASE

 0/4 V~ AC TRMS Alternating voltage, TRMS AC, full bandwidth, input 1 M—

 3 Hz ~ AC Voltage frequency, full bandwidth, input 1 M—

—  (Direct current) resistance 
0/2  Continuity testing with acoustic signal 
1

— nF Capacitance ——

0/2 A DC
1 A DC AC TRMS
0/2 A~ AC TRMS

V DC Diode voltage 

C Typ-K

Temperature thermocouple Type K 

Direct current value with AC DC clip-on current sensor 1 V:1/10/100/1000 A
Pulsating current value, TRMS, with AC DC clip-on current sensor, see above
Alternating current strength, TRMS, with clip-on current sensor, see above

—  — 
—  — 
—  — 

14 GMC-I Messtechnik GmbH

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Operating Overview – Connections, Keys, Rotary Switch, Symbols

!

5 V / 600 mA

Serial number

Registration number
Date of calibraion (year – month)

German Accrediation Body GmbH – Calibration lab

XY123

2012-08

D-K-

15080-01-01

User Interface Symbols in the Following Chapters

 ...  Scroll through main menu

 ...  Scroll through sub-menu

  Select decimal point

 Increase/decrease value

time Sub-menu/parameter (7-segment font)

1nFo Main menu (7-segment font, boldface)

Symbols on the Device

Warning concerning a point of danger
(attention: observe documentation!)

Ground

CAT III / IV Measuring category II I or I V device, see also

“Measuring Categories and their Significance per IEC
61010-1” on page 8

Continuous, doubled or reinforced insulation

Position of the infrared interface, window on the top of
the instrument (METRAHIT AM XTRA / X-
SECULIFEHITAM/MD only)

Position of the power pack connector socket,
see also chapter 3.1
(METRAHIT AM XTRA / X-

SECULIFEHIT

AM/MD only)

Fuse for current measuring ranges, see chapter 9.3
(not METRAHIT AM BASE / B

The device may not be disposed of with the trash.
Further information regarding the WEEE mark can be

Calibration seal (blue seal):

see also “Recalibration” on page 65.

TRA / OUTDOOR and

TRA / OUTDOOR and

ASE)

Indicates EC conformity

GMC-I Messtechnik GmbH 15

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Initial Start-Up – Setup

Attention!

!

Note

3 Initial Start-Up

3.1 Inserting Batteries or Rechargeable Batteries

Be certain to refer to chapter 9.2 regarding correct battery
installation.

Momentary battery voltage can be queried in the Info menu (see
chapter 6.3).

Display Illumination

After the instrument has been switched on, background illumina­tion can be activated by briefly pressing the ON / OFF | LIGHT key. Il­lumination is switched back off by once again pressing the same
key, or automatically after approximately 1 minute.

Switching the Instrument On via PC (METRAHIT AM XTRA / X-

AM/MD

and SECULIFEHIT

only)

TRA

/ O

UTDOOR

The multimeter is switched on after transmission of a data block

Disconnect the instrument from the measuring circuit be­fore opening the battery compartment lid in order to re­place the batteries.

from the PC, assuming the “irStb ” has been set to “ir on ” (see
chapter 6.4). However, we recommend using the power saving
mode: “ir off ”.

Operation with the Power Pack
(accessory for METRAHIT AM XTRA / X­SECULIFEHIT

AM/MD, not included, see chapter 10.3)

TRA / OUTDOOR and

Installed batteries are disconnected electronically if the NA X-TRA
power pack is used, and need not be removed from the
instrument.
If rechargeable batteries are used, they must be recharged
externally.
If the external power supply is switched off, the device is
automatically switched to battery operation without interruption.

3.2 Activation

Switching the Instrument On Manually

➭ Press the ON / OFF | LIGHT key until the display appears.

Power-up is acknowledged with a brief acoustic signal. As
long as the key is held depressed, all of the segments at the
liquid crystal display (LCD) are illuminated.
The LCD is depicted on page 13.
The instrument is ready for use as soon as the key is released.

16 GMC-I Messtechnik GmbH

Electrical discharge and high frequency interference may
cause incorrect displays to appear, and may disable the
measuring sequence. Disconnect the device from the measur-
ing circuit. Switch the instrument off and back on again in
order to reset. If the problem persists, briefly dislodge the
battery from the connector contacts (see also chapter 9.2).

3.3 Setting the Operating Parameters

Setting Time and Date

See the “t iME ” and “dAtE ” parameter in chapter 6.4.

Display Modes for the Analog Display

Selection can be made from two different display modes
(see “A.diSP ” parameter in chapter 6.4).

Display Modes for the Digital Display

Selection can be made from two different display modes (see
“0.diSP ” parameter in chapter 6.4).

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ON / OFF

LIGHT

FUNC

ENTER

ON / OFF

LIGHT

Auto-Range

8.8.8.8.8

Illumination On

000.00

ON / OFF

LIGHT

Illumination Off

000.00

ON / OFF

LIGHT

0ff

ON / OFF

LIGHT

Long
(1 s)

Initial Start-Up – Setup

3.4 Switching the Instrument Off

Switching the Instrument Off Manually

➭ Press the ON / OFF | LIGHT key until 0FF appears at the display.

Shutdown is acknowledged with a brief acoustic signal.

Automatic Shutdown

The instrument is switched off automatically if the measured value
remains unchanged for a long period of time (maximum measured
value fluctuation of approx. 0.8% of the measuring range per min­ute, or 1C or 1  F per minute), and if none of the keys or the ro­tary switch have been activated before a selected period of time
in minutes has elapsed (see “APoFF ” parameter on page 49.)
Shutdown is acknowledged with a brief acoustic signal.
Exceptions include:
Transmission and memory mode operation, continuous operation
and whenever a dangerous voltage is applied to the input (U > 55
V AC or U > 70 V DC).

Disabling Automatic Shutdown

The instrument can be set to continuous operation.

➭ Simultaneously press the and keys to

this end.
The “Continuous On” function is indicated at by means of the

ON display to the right of the battery symbol.

The “Continuous On” setting can only be cancelled by changing the
respective parameter, and not by switching the instrument off
(see “APoFF ” on page 49).

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Control Functions

4 Control Functions

4.1 Selecting Measuring Functions and Measuring Ranges

The rotary switch is linked to the automatic socket blocking
mechanism, which only allows access to two connector jacks for
each function. Be certain to remove the appropriate plug from its
respective jack before switching to and from the “A” functions.
The socket blocking mechanism prevents the user from inadvert­ently turning the selector switch to impermissible functions after
the measurement cables have been plugged in to the instrument.

4.1.1 Automatic Range Selection

The multimeter is equipped with auto-ranging for all measuring
functions, except for temperature measurement, diode and
continuity testing, and the MHz measuring function. Auto-ranging
is active as soon as the instrument is switched on. The instrument
automatically selects the measuring range which allows for
highest possible resolution of the applied quantity. When the
instrument is switched to frequency measurement, the previously
selected voltage measuring range remains active.

The Auto-Ranging Function

The multimeter is switched automatically to the next higher range
at (11999 d + 1 d 01200 d), and to the next lower range at
(01100 d - 1 d  10990 d).

Exception, capacitance measurement:

The multimeter is switched automatically to the next higher range
at (1199 d + 1 d 0120 d), and to the next lower range at
(0110 d - 1 d  1099 d).

4.1.2 Manual Measuring Range Selection

Auto-ranging can be deactivated and measuring ranges can be
selected manually in accordance with the following table by
pressing the MAN / AUTO button.

The desired measuring range can then be selected with the

 scroll key.

 or

The instrument is automatically returned to range selection when
the MAN / AUTO key is pressed, the rotary switch is activated or the
instrument is switched off and back on again.

Overview: Auto-Ranging and Manual Range Selection

Function Display

MAN / AUTO

Range switching sequence for:

V: 100 mV*
Hz: 100 Hz

: 100 

10 M 40 M

A: METRA HIT AM XTRA / X-

SECULIFEHIT

 or 

MAN / AUTO

* Via manual measuring range selection only

100A 1 mA 10 mA 100 mA 1A 10 A (16 A)

METRAHIT AM TECH / TECH:

10 mA

METRAHIT AM PRO / P

A:METRAHITAM BASE / B

ECH: see chapter 5.7.3 ff

T

F: METRAHIT AM XTRA / X-

SECULIFEHIT

10 nF 100 nF 1F 10F 100F 1000F

Return to automatic measuring range selection —

Manual mode active:

utilized measuring range is fixed



1 V 10 V 100 V 1000 V



1 kHz 10 kHz 100 kHz



1 k 10 k 100 k1 M

TRA / OUTDOOR and

AM/MD:



100 mA 1A 10 A (16 A)

RO: 1A



10 A (16 A)

ASE and METRAHIT AM TECH /

AM/MD and METRAHIT AM TECH / TECH:

TRA / OUTDOOR,

MAN



MAN

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Control Functions

Note

4.1.3 Quick Measurements

Measurements performed using a suitable fixed measuring range
are executed more quickly than those which utilize automatic
range selection. Quick measurement is made possible with the
following two functions:

• Manual measuring range selection, i.e. selection of the measuring
range with the best resolution (see chapter 4.1.2).

or

•With the DATA function (see chapter 4.4). In this way, the
appropriate measuring range is selected automatically after the
first measurement and the second measurement is executed
more quickly.

The selected measuring range remains active for the subsequent
series of measurements with these two functions.

4.2 Zero Offset / Relative Measurements

Depending upon deviation from the zero point, zero balancing or
a reference value for relative measurements can be stored to
memory:

Deviation from zero
– With short-circuited measurement cables for V, , A
– With open input for capacitance unit of measure F

0 to 200 digits ZERO REL

> 200 to 5000 digits REL

Display

The applicable reference or correction value is deducted
individually for the respective measuring function as an offset from
all subsequent measurements, and remains in memory until
deleted, or until the multimeter is switched off.

Zero balancing and reference value adjustment can be used for
auto-ranging, as well as for manual measuring range selection.

Zero Balancing

➭ Plug the measurement cables into the instrument and connect

the free ends to each other, except for capacitance
measurement in which case the ends of the cables are not
connected to each other.

➭ Briefly press the ZERO | ESC key.

The instrument acknowledges zero balancing with an acoustic
signal, and the “ZERO REL” symbol appears at the LCD. The
value measured at the moment the key is pressed serves as a
reference value.

➭ Zero balancing can be cleared by once again pressing the

ZERO | ESC key.

As a result of TRMS measurement, the multimeter displays a
residual value of 1 to 30 digits with short-circuited measure­ment cables as the zero point for V AC / I AC or V(AC+DC) /
I (AC+DC) measurements (non-linearity of the TRMS con­verter). This has no influence on specified accuracy above
2% of the measuring range (or 3% in the mV range).

Setting the Reference Value

➭ Plug the measuring cables into the instrument and measure a

reference value (max. 5000 digits).

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Control Functions

➭ Briefly press the ZERO | ESC key.

The instrument acknowledges storage of the reference value
with an acoustic signal, and the “ZERO REL” or the “REL”
symbol appears at the LCD. The value measured at the
moment the key is pressed serves as a reference value.

➭ The reference value can be cleared by once again pressing the

ZERO | ESC key.

Notes Regarding Relative Measurement

• Relative measurement effects the digital display only. The
analog display continues to read out the original measured
value.

• In the case of relative measurement,  / F or AC quantities
may also appear as negative values.

4.3 Display (LCD)

4.3.1 Digital Display

Measured Value, Unit of Measure, Type of Current, Polarity

The measured value with decimal and plus or minus sign appears
at the digital display. The selected unit of measure and type of
current are displayed as well. A minus sign appears to the left of
the value during measurement of zero-frequency quantities, if the
plus pole of the measured quantity is applied to the “” input.
The “0.diSP ” parameter can be used to determine whether lead-
ing zeros will be appear or be suppressed at the measured value
display (see chapter 6.4).

Overranging

If the upper range limit of 12,000 digits is exceeded “0L” (overload)
appears at the display.
Exceptions: “0L” appears as of 1200 digits for capacitance
measurement, and as of 5100 digits for diode testing.

20 GMC-I Messtechnik GmbH

4.3.2 Analog Display

Measured Value, Polarity

The analog display demonstrates the dynamic performance of a
moving-coil mechanism. This display is especially advantageous
for observing measured value fluctuation, and for balancing
procedures.

Two different display modes can be selected in the “SET ” menu
with the help of the “A.diSP ” parameter (see chapter 6.4):

• Bar graph

• Pointer: The current measured value is tracked in real-time.
The analog scale displays a negative range of 2 scale divisions for

the measurement of zero-frequency quantities, allowing for
precise observation of measured value fluctuation around zero. If
the measured value exceeds the negative range of 2 scale
divisions, polarity is reversed at the analog display.

Scaling of the analog scale is automatic. This is very helpful for
manual measuring range selection.

Overranging

Overranging in the positive range is displayed by means of the
right triangle symbol.

Refresh Rate

In the bar graph and pointer modes, the analog display is
refreshed 40 times per second.

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4.4 Measured Value Storage: DATA (auto-hold / compare)

Note

V, A, Hz

t [s]

100%

10%

Activated

Reactivated

Save

Save

10,000 digits

of measuring range

F, MHz, %

An individual measured value can be automatically “frozen” with
the DATA function (auto-hold). This is useful, for example, when
contacting the measuring points with the test probes requires
your full attention. After the measuring signal has been applied
and the measured value has settled in in accordance with the
“condition” listed in the table below, the measured value is frozen
at the digital display and an acoustic signal is generated. The test
probes can now be removed from the measuring points, and the
measured value can be read from the digital display. If the
measuring signal falls below the value specified in the table, the
function is reactivated for storage of the next value.

Measured Value Comparison (DATA Compare)

If the currently frozen value deviates from the first saved value by
less than 100 digits, the acoustic signal is generated twice. If
deviation is greater than 100 digits, only a brief acoustic signal is
generated.

The DATA function has no effect on the analog display, at
which the current measured value continues to appear.
However, when the digital display if “frozen”, the decimal
point is fixed as well (fixed measuring range, symbol: MAN).
The selected measuring range should not be manually
changed as long as the DATA function is active.

The DATA function is deactivated by pressing and holding the
DATA / MIN / MAX key (for approx. 1 second), when the measuring
function is changed or when the instrument is switched off and
back on again.

Control Functions

Condition Response from Instrument

DATA

Function

Activate Brief blinks Once

Save
(stabilized
measured

value)

Reactivate

Change to

Min/Max

Exit Long

1)

Reactivation results from falling short of specified measured value limits.

2)

Two acoustic signals are generated the first time a measured value is
saved as a reference value. For subsequent data hold, two acoustic
signals are only generated if the currently frozen value deviates from the
first saved value by less than 100 digits.

Key: MV = measured value, R = measuring range

Press

DATA /

Min/Max

1)

Brief See table in chapter 4.4.1

Measuring

Function

V, A, F, Hz,

MHz, %



V, A, F, Hz,

MHz, %



Measuring

Signal

> 10%

of R

0L

< 10%

of R

= 0L

Display

MV

MV

DATA

Static

Blinks

Digital

Is dis-

played

Stored

Is cleared Is cleared

Acoustic

Twi ce

Once

Twi ce

2)

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Control Functions

Note

Example

The voltage measuring range is set manually to 10 V.
The first measured value is 5 V, which is stored to memory
because it is greater than 10% of the measuring range (= 1 V),
and is thus reliably above the background noise level. As soon as
the measured values drops to less than 10% of the measuring
range, i.e. amounts to less than 1 V which corresponds to
removal of the test probes from the measuring point, the
instrument is ready to store a new value.

4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function

Minimum and maximum measured values applied to the
measuring instrument’s input after the Min/Max function has been
activated can be “frozen” at the display. The most important use
of this function is the determination of minimum and maximum
values during long-term measured value observation.

The Min/Max function can be activated in all measuring functions.
The Min/Max function has no effect on the analog display, at

which the momentary measured value continues to appear.
Apply the measured quantity to the instrument and set the

measuring range with the MAN / AUTO key before activating the
Min/Max function.

The Min/Max function is deactivated by pressing and holding the
DATA / MIN / MAX key (for approx. 1 second), when the measuring
function is changed or when the instrument is switched off and
back on again.

Min/Max
Function

1

Activate

and save

2

Save and

display

3

Return to 1

Stop Long Are deleted

Press

DATA /

Min/Max

2 x brief are saved

Brief

Brief

Brief

Min. and Max.

Measured Values

Storage continues in

background,

new min. and max.

values are displayed.

Same as 1,

stored values are not

deleted

Response from Instrument

Display

Measured Value

Digital

Momentary

measured

value

Saved min.

value

Saved max.

value

Same as 1

Momentary

measured

value

Acoustic

Max.

Signal

Min.

Max
and
min.

Min. 1 x

Max. 1 x

Same

as 1

Is

deleted

2 x

1 x

2 x

As opposed to the DATA function, the Min/Max function can
also be used for temperature measurement.

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Control Functions

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

4.5 Measurement Data Recording (METRAHIT AM XTRA / X-TRA /
O

UTDOOR and SECULIFEHITAM/MD only)

The METRAHIT AM XTRA / X-

TRA / OUTDOOR / SECULIFEHITAM/MD is capa-

ble of recording measurement data using an adjustable sampling
rate for long periods of time in the form of measurement series.
Data are stored to a battery backed memory module, and are re­tained even after the multimeter is switched off. The system ac­quires measured values relative to real-time.

Stored measured values can subsequently be read out with the
help of METRAwin 10 software. The only prerequisite is a PC which
is connected by means of an interface cable to the
USB X-TRA bi-directional interface adapter, which is in turn
plugged onto the METRAHIT AM XTRA / X-

TRA / OUTDOOR or

SECULIFEHITAM/MD. See also chapter 7.

Memory Parameters Overview (METRAHIT AM XTRA / X-TRA / OUTDOOR or
SECULIFEHITAM/MD only)

Parameter Page: header

CLEAr
EMpty
0CCvP
rAtE

StArt
StoP

24: Clear Memory
24: Clear Memory – appears after CLEAr

24: Querying Memory Occupancy

48: rAtE – set the sampling rate (
only)

23: Starting Recording via Menu Functions

24: Ending Recording

AM XTRA /

X-

TRA

/ O

UTDOOR

/ HITAM/MD

The STORE Menu Function

➭ First set the sampling rate for memory mode operation (see rAtE

parameter in chapter 6.4) , and then start memory mode oper­ation.

➭ First select the desired measuring function and an appropriate

measuring range.

➭ Check the battery charge level before starting long-term

measurement recordings (see chapter 6.3).
Connect the NA X-TRA power pack if required.

Starting Recording via Menu Functions

➭ Switch to the “SET ” mode by pressing MEASURE | SETUP and se-

lect the “StorE ” menu.

1nFo  ...  StorE 000.0%  StArt

➭ Memory mode operation is started by pressing FUNC | ENTER.

STORE appears underneath the analog display and indicates

that memory mode operation has been activated.
“StoP ” appears at the digital display.

➭ Press MEASURE | SETUP in order to return to the measuring

function.

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Control Functions

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

During Recording

STORE is displayed underneath the analog display during memory

mode operation, and

 000.3%

StoP

memory occupancy

The following message appears as soon as memory is full: “

can be controlled:

100.0

%”.

In order to be able to observe measured values during recording,
switch to the measuring function by pressing MEASURE | SETUP.
The display is returned to the memory menu after once again
pressing MEASURE | SETUP.

A new memory block is created when another measuring function
is selected with the rotary switch or the FUNC | ENTER key. Data
storage then continues automatically.

Ending Recording

➭ “StoP ” appears at the display after pressing MEASURE | SETUP.

StoP start

➭ Acknowledge the “StoP ” display by pressing FUNC | ENTER.

STORE is cleared from the display, indicating that recording has

been ended.

➭ Press MEASURE | SETUP in order to return to the measuring

function.

➭ Memory mode operation can also be exited by switching the

multimeter off.

Querying Memory Occupancy

Memory occupancy can be queried during recording with the
help of the “1nFo ” menu (see also chapter 6.3).

Memory occupancy range: 000.1% to 099.9%.

1nFo



bAtt: 

... 

0CCvP

%:

017.4

%

Memory occupancy can be queried before recording is started via
the “StorE” menu.

 ...  StorE 017.4 %  StArt

1nFo

Clear Memory

This function deletes all measured values from memory!
This function cannot be executed during memory mode

operation.

 ...  StorE 017. 4% w StArt

1nFo

 CLEAr empty

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V/Hz, , Temperature, and A/Hz Measurements

5 Measurements

5.1 Voltage Measurement

Notes Regarding Voltage Measurement

• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous voltages are otherwise not
indicated, and the instrument may be damaged.

• The multimeter may only be operated by persons who are
capable of recognizing contact hazards and taking the appropri­ate safety precautions. Contact hazards exist anywhere, where
voltages of greater than 33 V RMS may occur.
The test probes may only be only gripped up to the finger

Do not touch the metallic test probes under any

guard.
circumstances.

• Avoid working alone when taking measurements which involve
contact hazards. Be certain that a second person is present.

• Maximum permissible voltage between the connector sockets,
(9 and 10) and ground (8) is 1000 V for measuring category I I I,
and 600 V for measuring category IV.

Exception SECULIFE HIT

• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.

• No measurements may be made with this instrument in
electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be pres­ent.

AM/HITMD: 600 V CAT III and 300 V CAT IV.

• Be aware of the fact that dangerous voltage spikes are not displayed
during measurement with the low-pass filter.
We recommend measuring voltage without the low-pass filter first, in
order to be able to detect any dangerous voltages.

• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in chapter 8, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the “Over­load Capacity” column.

Scope of Functions, Voltage Measurement

Function METRA HIT

V AC / Hz TRMS
(Ri  9 M)

V AC / LP filter 1 kHz
(Ri = 1 M2)) TRMS

V AC+DC TRMS
(Ri  9 M)

V DC (Ri  9 M)

MHz at 5 V AC

Duty cycle as %

Freq. response, V AC

1)

A 1 kHz low-pass filter can be used in this case, in order to filter out high
frequency pulses of greater than 1 kHz, for example when performing
measurements at pulsed motor drives.

2)

Input resistance of approx. 1 M. Erroneous displays resulting from
capacitive coupling during voltage measurement in power supply
systems are reduced to a minimum in this way.

AM XTRA
X-

TRA

OUTDOOR /
SECULIFEHIT

AM/MD

1)

20 kHz 10 kHz 10 kHz 1 kHz

METRAHIT
AM TECH
T

ECH



—




 ———
 ———

METRAHIT
AM PRO
P

RO

METRA HIT
AM BASE
B

ASE

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5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)

Note

Note

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V
Tem p



– (+)

+ (–)

V= : 100 mV1000 V

020.00

V

DC

AC

TRMS

020.00

V

DC

V

V

V

V

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

Max. 1000 V (< 10 kHz)

V: 100 mV1000 V

Hz: 1Hz  100 kHz

Max. 100 V (> 10 kHz)

P

max

= 3 x 106 V x Hz

Measuring Ranges:

230.0

FUNC

ENTER

for U > 100 V

Only to observe for METRAHIT AM TECH / TECH: Set the CL iP

parameter to 0FF in the current clip setup menu. Otherwise
all measured values are displayed in amperes, and are cor­rected by the amount resulting from the selected transfor­mation ratio for an interconnected clip-on current sensor.

 ...  SET rAtE  ...  CL IP

1nFo

V/Hz, , Temperature, and A/Hz Measurements

1 / 10/100/1000 / 0ff



➭ In accordance with the voltage to be measured, turn the rotary

switch to V or V .

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

An intermittent acoustic signal warns the operator if the meas­ured value exceeds the upper range limit in the 1000 V range.

Make sure that a current measuring range (“A”) has not been
activated when the multimeter is connected for voltage measure­ment! If the fuse’s blowing limits are exceeded as a result of oper­ator error, both the operator and the instrument are in danger!

With the rotary switch in the V position, the multimeter is always
set to the 1 V measuring range immediately after it is switched on.
As soon a the MAN / AUTO key is pressed, and assuming the
measured value is less than 90 mV, the multimeter is switched to
the mV measuring range.

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V/Hz, , Temperature, and A/Hz Measurements

Note

Note

Attention!

!

1 kHz

5.1.2 Alternating Voltage Measurement with 1 M Load Resistance

and Frequency Measurement with Selectable Low-Pass Filter
(METRAHIT AM X-TRA / AM TECH / AM PRO / X­P

RO

/ SECULIFEHITAM/MD only)

The measuring instrument includes a V

1M

TRA

/ O

UTDOOR

/ T

switch position for

electricians with an input resistance of approximately 1 M.
Erroneous displays resulting from capacitive coupling during
voltage measurement in power supply systems are reduced to a
minimum in this way.

Frequency Measurement

➭ Apply the measured quantity is the same way as for voltage

ECH

/

measurement.

➭ Manually select the measuring range for the voltage amplitude.

When the instrument is switched to frequency measurement,
the previously selected voltage measuring range remains
active.

➭ You can switch back and forth between frequency

measurement with and without low-pass filter.
Press the FUNC | ENTER multifunction key repeatedly until unit of

TECH: see note in chapter 5.1.1.

➭ In accordance with the voltage to be measured, turn the rotary

switch to V~

or .

1M

measure Hz or Hz/Fil appears at the display.
Lowest measurable frequencies and maximum allowable
voltages are included in chapter 8, “Technical Data”.

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

Measurement with Low-Pass Filter

Voltage Measurement

Be aware of the fact that dangerous voltage spikes are not

An intermittent acoustic signal warns the operator if the
measured value exceeds the upper range limit in the 1000 V
range.

Make sure that a current measuring range (“A”) has not been
activated when the multimeter is connected for voltage measure­ment! If the fuse’s blowing limits are exceeded as a result of oper­ator error, both the operator and the instrument are in danger!

➭ You can switch back and forth between voltage measurement

with and without low-pass filter.

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

displayed during this type of measurement (see also “Voltage
Comparator”.
We recommend measuring voltage without the low-pass filter
first, in order to be able to detect any dangerous voltages.

A 1 kHz low-pass filter can be activated if required, in order to
filter out high frequency pulses of greater than 1 kHz, for example
when performing measurements at pulsed motor drives, i.e.
undesired voltages of greater than 1 kHz can be suppressed.

The active low-pass filter is indicated by the Fil display. The
multimeter is automatically switched to manual measuring range
selection.

measure V or V/Fil appears at the display.

28 GMC-I Messtechnik GmbH

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COM

V
Tem p



Max. 1000 V (< 10 kHz)

V~: 100 mV1000 V

Hz: 1Hz  100 kHz

~

Max. 100 V (> 10 kHz)

P

max

= 3 x 106 V x Hz

Measuring Ranges:

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

230.0

for U > 100 V

V~

1 kHz

1M

1 kHz

V~

0225.6

V

AC
TRMS

050.00

Hz

AC

Hz

Hz with Filter

Hz

1 kHz

0226.0

V

AC
TRMS

F

il

V~

F

il

049.99

Hz

AC

V~ with Filter

!

!

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

Voltage Comparator for Displaying Dangerous Voltage

The input signal or measuring signal is checked by a voltage
comparator for dangerous spikes, because these do not appear
at the display when the low-pass filter is used.
At voltages of greater than 55 V AC or 70 V DC, a danger symbol
appears at the display: .

V/Hz, , Temperature, and A/Hz Measurements

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V/Hz, , Temperature, and A/Hz Measurements

Note

Note

Attention!

!

5.1.3 Alternating Voltage and Frequency Measurement V AC and Hz
with Selectable Low-Pass Filter
(METRAHIT AM X-TRA / AM TECH / AM PRO / X­P

RO

/

SECULIFEHITAM/MD only)

METRAHIT AM TECH / TECH: see note in chapter 5.1.1.

➭ In accordance with the voltage or frequency to be measured,

turn the rotary switch to V~ or Hz.

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

Voltage Measurement

An intermittent acoustic signal warns the operator if the meas­ured value exceeds the upper range limit in the 1000 V range.

Make sure that a current measuring range (“A”) has not been
activated when the multimeter is connected for voltage measure­ment! If the fuse’s blowing limits are exceeded as a result of oper­ator error, both the operator and the instrument are in danger!

➭ You can switch back and forth between voltage measurement

with and without low-pass filter.

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

measure V or V/Fil appears at the display.

30 GMC-I Messtechnik GmbH

TRA

/ O

UTDOOR

/ T

Frequency Measurement

➭ Apply the measured quantity is the same way as for voltage

ECH

/

measurement.

➭ Manually select the measuring range for the voltage amplitude.

When the instrument is switched to frequency measurement,
the previously selected voltage measuring range remains
active.

➭ You can switch back and forth between frequency

measurement with and without low-pass filter.
Press the FUNC | ENTER multifunction key repeatedly until unit of
measure Hz or Hz/Fil appears at the display.
Lowest measurable frequencies and maximum allowable
voltages are included in chapter 8, “Technical Data”.

Measurement with Low-Pass Filter

Be aware of the fact that dangerous voltage spikes are not
displayed during this type of measurement (see also “Voltage
Comparator”.
We recommend measuring voltage without the low-pass filter
first, in order to be able to detect any dangerous voltages.

A 1 kHz low-pass filter can be activated if required, in order to
filter out high frequency pulses of greater than 1 kHz, for example
when performing measurements at pulsed motor drives, i.e.
undesired voltages of greater than 1 kHz can be suppressed.

The active low-pass filter is indicated by the Fil display. The
multimeter is automatically switched to manual measuring range
selection.

The specified measuring accuracy is not achieved when the filter
is activated and signals are greater than 100 Hz.

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COM

V
Tem p



Max. 1000 V (< 10 kHz)

V~: 100 mV1000 V

Hz: 1Hz  100 kHz

~

Max. 100 V (> 10 kHz)

P

max

= 3 x 106 V x Hz

Measuring Ranges:

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

230.0

for U > 100 V

0230.6

V

AC

TRMS

050.03

Hz

AC

V~

Hz

V~

Hz

0229.6

V

AC

TRMS

F

il

V~ with Filter

1 kHz

V~

050.00

AC

F

il

Hz

Hz with Filter

1 kHz

Hz

!

!

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

Voltage Comparator for Displaying Dangerous Voltage

The input signal or measuring signal is checked by a voltage
comparator for dangerous spikes, because these do not appear
at the display when the low-pass filter is used.
At voltages of greater than 55 V AC or 70 V DC, a danger symbol
appears at the display:

V/Hz, , Temperature, and A/Hz Measurements

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V/Hz, , Temperature, and A/Hz Measurements

Attention!

!

Note

duty cycle (%) =

pulse duration (t

E

)

pulse period (t

P

)

 100

COM

V
Tem p



Max. 5 V

!

1.0323

MHz

002.00

%

MHz

%

MHz

%

U

t

t

E

t

P

tE/t

P

Pulse Time Quantities

f

P

pulse frequency = 1/tP

t

E

pulse duration

t

P

pulse period

t

P

– tEinterpulse period

t

E/tP

pulse or duty cycle

f

P

FUNC

ENTER

Measuring Ranges:

MHz tE/t

P

100 Hz ... 1 kHz 2 ... 98%

... 10 kHz 5 ... 95%

... 100 kHz 10 ... 90%

5.1.4 Frequency and Duty Cycle Measurements
(METRA HIT AM XTRA / X-

➭ Set the rotary switch to MHz or %.

➭ Connect the measurement cables as shown.

Make sure that a current measuring range (“A”) has not been
activated when the multimeter is connected for frequency or
duty cycle measurement!

The applied signal voltage may not exceed 5 V.

Frequency Measurement, MHz

A 5 V signal with a frequency of up to 1 MHz is measured and
displayed using MHz as a unit of measure. Pulse frequency
demonstrates the reciprocal value of pulse period.

Duty Cycle Measurement, t

The ratio of pulse duration to pulse period is measured with
periodic square-wave signals and displayed as a percentage.

TRA / OUTDOOR / SECULIFEHITAM/MD only)

E/tP

The applied frequency must remain constant during duty
cycle measurement.

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5.2 Resistance Measurement, 

Note

COM

V
Tem p



R

x

R

x

0V !

!



000.00

k





100   40 M

Measuring Ranges:

➭ Disconnect supply power from the electrical circuit of the

device to be measured, and discharge all high-voltage
capacitors.

➭ Make sure that the device under test is voltage-free.

Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “”.

➭ Connect the device under test as shown.

Use short or shielded measurement cables in the case of
high-impedance resistance.

Improving Accuracy by means of Zero Balancing

Cable resistance and contact resistance can be eliminated in all
measuring ranges by means of zero balancing (see chapter 4.2).

V/Hz, , Temperature, and A/Hz Measurements

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V/Hz, , Temperature, and A/Hz Measurements

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V
Tem p



0V !

!

000.8



0.443

V

DC

R < 1, 10, 20, 30, 40, 90 

FUNC

ENTER

5.3 Continuity Test

➭ Disconnect supply power from the electrical circuit of the

device to be measured, and discharge all high-voltage
capacitors.

➭ Make sure that the device under test is voltage-free.

Interference voltages distort measurement results!

➭ Set the rotary switch to .

➭ Connect the conductor path under test as shown.

Depending upon the selected limit value, the multimeter
generates a continuous acoustic signal in the case of continuity or
short-circuit, i.e. at a value of less than the selected limit value.

“0L” appears at the display in the case of an open connection.
The limit value can be adjusted in the “SETUP” menu (see also

chapter 6.4):

 ...  SET rAtE  ...  bEEP

1nFo

1, 10, 20, 30, 40, 90 

(10 = default setting)

34 GMC-I Messtechnik GmbH

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5.4 Diode Testing with a Constant Current of 1 mA

Note

COM

V
Tem p



Forward Direction Reverse Direction

0V !

0.654

0.L

to 5.100 V

Measuring Range:

+

–

0.443

V

!

000.8



DC

FUNC

ENTER

➭ Disconnect supply power from the electrical circuit of the

device to be measured, and discharge all high-voltage
capacitors.

➭ Make sure that the device under test is voltage-free.

Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to .

➭ Press the

➭ Connect the device under test as shown.

Conducting Direction and Short-Circuit

The instrument displays forward voltage in volts (display: 4
places). As long as voltage drop does not exceed the maximum
display value of 5.1 V, several series connected components or
reference diodes can be tested with a small reference voltage and
reference diodes.

Reverse Direction and Interruption

The measuring instrument indicates overload 0L.

FUNC | ENTER

key.

V/Hz, , Temperature, and A/Hz Measurements

Resistors and semiconductor paths connected in parallel to
the diode distort measurement results!

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V/Hz, , Temperature, and A/Hz Measurements

Note

Note

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

Te mp

TC

0023.3

°C

Temp

RTD

Typ e K

TC

COM

V
Tem p



TE (TC)

0256.0

°C

Pt1000

RTD

Measuring Range

TE (TC) K (NiCr-Ni) –250.0  + 1372.0C

FUNC

ENTER

5.5 Temperature Measurement

Temperature measurement is performed with a type K
thermocouple (accessory, not included), which is connected to
the voltage input. Alternatively, a Pt100 or Pt1000 resistance
thermometer can be used with the METRA HIT AM XTRA / X-TRA /
OUTDOOR / SECULIFEHITAM/MD .

The internal reference temperature (temperature of the inter­nal reference junction) is measured by a temperature sensor
inside of the instrument. This may be somewhat above room
temperature as a result of internal heat-up, or moving from
warmer to colder surroundings or vice versa.

Selecting the Unit of Measure for Temperature

 ...  tEMP °C / °F 

1nFo

(°C = default setting)

5.5.1 Measurement with Thermocouples, Temp TC

➭ Set the rotary switch to “Temp

METRA HIT AM XTRA / X-TRA / OUTDOOR / SECULIFEHITAM/MD only:
The last selected temperature measurement or the last
selected temperature sensor, i.e. type K or Pt100/Pt1000,
remains in memory and is accordingly displayed. Press the
FUNC | ENTER key in order to change to the other measuring
function if required.

➭ The reference temperature is measured at the internal

reference junction (see parameter “1tEMP ” in chapter 6.3
regarding querying).

36 GMC-I Messtechnik GmbH

TC

”.

➭ Connect the sensor to the two accessible jacks. The instru-

ment displays the measured temperature using the selected
unit of measure.

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V/Hz, , Temperature, and A/Hz Measurements

COM

V
Tem p



Te mp

TC

0023.3

°C

Temp

RTD

Typ e K

0025.6

°C

Pt1000

TC

RTD

000.00



Short Leads

R L

Enter Cable Resistance

Automatic

RTD

Compensation

Measuring Ranges

RTD Pt100 – 200.0  + 850.0C
RTD Pt1000 –150.0  + 850.0C

FUNC

ENTER

FUNC

ENTER

ZERO

ESC

ZERO

ESC

FUNC

ENTER

000.50



R L

5.5.2 Measurement with Resistance Thermometers

(METRA HIT AM XTRA / X-

➭ Set the rotary switch to “TempTC” or “Temp

The last selected temperature measurement or sensor, i.e. type K
or Pt100/Pt1000, remains in memory and is accordingly
displayed. Press the FUNC | ENTER key in order to change to the
other measuring function if required. The sensor type, i.e. Pt100
or Pt1000, is detected automatically and displayed.

There are two different ways to compensate for cable resistance:

Automatic Compensation

➭ Press the ZERO | ESC key.

“Short leads” appears at the display.

If you prefer to enter cable resistance directly, you can skip the
following entry prompt.

➭ Short circuit the measuring instrument’s connector cables.

“000.00 ” appears at the display. After pressing the FUNC |
ENTER key, automatic compensation of cable resistance is
activated for all subsequent measurements. The short-circuit
can now be eliminated, and the device is ready for use.

Entering Cable Resistance

➭ Press the ZERO | ESC key once again in the automatic

compensation menu.

➭ Enter the known resistance of the connector cables with the

scroll keys: Select the digit to be changes with the
and change the respectively selected digit with the keys.
The default value is 0.43 . Values can be selected within a
range of 0 to 50 .

GMC-I Messtechnik GmbH 37

TRA

/ O

UTDOOR

/ SECULIFEHITAM/MD only)

RTD

”.

 keys,

➭

Upon pressing the
the display is returned to the measuring function. Cable resistance re­mains in memory even after the instrument has been switched off.

FUNC | ENTER

key, the selected value is activated and

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V/Hz, , Temperature, and A/Hz Measurements

Note

COM

V
Tem p



0V !

!

10.38

F

+

–

+

–



10 nF ... 1000 F

Measuring Ranges:

5.6 Capacitance Measurement (METRA HIT AM XTRA / X-TRA /

O

UTDOOR / SECULIFEHITAM/MD and METRAHIT AM TECH / TECH only)

➭ Disconnect supply power from the electrical circuit of the

device to be measured, and discharge all high-voltage
capacitors.

➭ Make sure that the device under test is voltage-free.

Capacitors must always be discharged before measurement is
performed.
Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “ ”.

➭ Connect the (discharged!) device under test to the sockets

with the measurement cables as shown.

The “–” pole of polarized capacitors must be connected to
the “” jack.
Resistors and semiconductor paths connected in parallel to
the capacitor distort measurement results!

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V/Hz, , Temperature, and A/Hz Measurements

5.7 Current Measurement

Notes Regarding Current Measurement

• The multimeter may only be operated with installed batteries or

rechargeable batteries. Dangerous currents are otherwise not
indicated, and the instrument may be damaged.

• Set up the measuring circuit in a mechanically secure fashion,

and secure it against inadvertent breaks. Select conductor
cross-sections and lay out connections such that they do not
overheat.

• An intermittent acoustic signal warns of current greater than

10 A. An continuous acoustic signal warns of current greater
than 16 A.

• The input for the current measuring range is equipped with a

fuse link. Maximum permissible voltage for the measuring
circuit (= rated voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only! The fuse must have a breaking
capacity of at least 30 kA.

• If the fuse for the active current measuring range blows, “FUSE ”

appears at the digital display, and an acoustic signal is
generated at the same time.

• If a fuse should blow, eliminate the cause of overload before

placing the instrument back into service!

• Fuse replacement is described in chapter 9.3.

• Be absolutely certain that the measuring ranges are not

overloaded beyond their allowable capacities. Limit values are
included in chapter 8, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the “Over­load Capacity” column.

Scope of Functions, Current Measurement, Direct Connection

Function

A AC / Hz ~ 100 A

A AC+DC TRMS

A DC 100 A

1000 V fuse

METRA HIT
AM XTRA

TRA

X-

OUTDOOR

SECULIFEHIT

AM/MD

1/10/100 mA

1 A / 10 (16)

100 A

1/10/100 mA

1A / 10 (16) A

1/10/100 mA

1A / 10 (16) A

METRA HIT
AM TECH

ECH

T

10/100 mA

1 A / 10 (16) A

A

10/100 mA

1A / 10 (16) A

10/100 mA

1A / 10 (16) A

 —

METRAHIT
AM PRO

RO

P

1 A / 10 (16) A

1 A / 10 (16) A

1 A / 10 (16) A

METRAHIT
AM BASE

ASE

B

—

—

—

Scope of Functions, Current Measurement via Clip-On Current Sensor

Function

Transformation
Factor

A AC / Hz

A AC+DC

A DC

Hz (A AC)

METRA HIT
AM XTRA
X-

TRA

OUTDOOR

SECULIFEHIT

AM/MD

... 30 kHz ... 30 kHz ... 30 kHz ... 30 kHz

METRA HIT
AM TECH
T

ECH

—  — 

—  — 
—  — 
—  — 

METRAHIT
AM PRO
P

RO

METRAHIT
AM BASE
B

ASE

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V/Hz, , Temperature, and A/Hz Measurements

COM mA A

V
Tem p



~

R

x

~

R

x

1

3

2

I > 10 A

!

A

A

003.50

A

DC

003.50

A

DC

AC

TRMS

A

A

8.8.8.8.8

!

I > 16 A

Current

Measuring Ranges:

Current measurement
may only be performed
with installed batteries!

FUNC

ENTER

AM XTRA / X-TRA / OUTDOOR

METRAHIT AM PRO / PRO

1 A / 10 A (16 A max. 30 s)

100 A / 1 mA
10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)

METRAHIT AM TECH / TECH

10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)

SECULIFEHITAM/MD

5.7.1 Direct and Pulsating Current Measurement, Direct Connection, A DC and A (DC+AC) (METRAHIT AM X-TRA / AM TECH / AM PRO / X-TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only)

➭ First disconnect supply power from the measuring circuit or

the power consumer (1), and discharge any capacitors.

➭ In accordance with the current to be measured, turn the rotary

switch to A or A

➭ Select the current type appropriate for the measured quantity

by briefly pressing the FUNC | ENTER multifunction key. Each
time the key is pressed, the instrument is switched back and
forth between A DC and A (DC + AC)
by means of an acoustic signal. The current type is indicated at
the LCD by means of the DC or the (DC+AC)

➭ Safely connect the measuring instrument (without contact

resistance) in series to the power consumer (2) as shown.

➭ Switch supply power to the measuring circuit back on (3).

➭ Read the display. Make a note of the measured value if the

instrument is not being operated in the memory mode or the
transmission mode.

➭ Disconnect supply power from the measuring circuit or the

power consumer (1) once again, and discharge any
capacitors.

➭ Remove the test probes from the measuring point and return

the measuring circuit to its normal condition.

.

, which is indicated

TRMS

symbol.

TRMS

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5.7.2 Alternating Current and Frequency Measurement, Direct Connec-

COM mA A

V
Tem p



~

R

x

~

R

x

1

3

2

A~

Hz

A~

Hz

003.50

A

AC

TRMS

050.10

Hz

AC

8.8.8.8.8

!

I > 10 A

!

I > 16 A

Current measurement
may only be performed
with installed batteries!

Measuring Ranges:

Current

FUNC

ENTER

AM XTRA / X-TRA / OUTDOOR

METRAHIT AM PRO / PRO

1 A / 10 A (16 A max. 30 s)

100 A / 1 mA
10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)

METRAHIT AM TECH / T

ECH

10 mA / 100 mA
1 A / 10 A (16 A max. 30 s)

SECULIFEHIT

AM/MD

tion, A AC and Hz (METRAHIT AM X-TRA / AM TECH / AM PRO /
X-

➭ First disconnect supply power from the measuring circuit or

the power consumer (1), and discharge any capacitors.

➭ In accordance with the current or frequency to be measured,

turn the rotary switch to A~ or Hz.

➭ Select the desired measured quantity by briefly pressing the

FUNC | ENTER multifunction key. Each time the key is pressed,
AC

TRMS

switching is acknowledged with an acoustic signal.

➭ Safely connect the measuring instrument (without contact

resistance) in series to the power consumer as shown.

➭ Switch supply power to the measuring circuit back on (3).

➭ Read the display. Make a note of the measured value if the

instrument is not being operated in the memory mode or the
transmission mode.

➭ Disconnect supply power from the measuring circuit or the

power consumer (1) once again, and discharge any
capacitors.

➭ Remove the test probes from the measuring point and return

the measuring circuit to its normal condition.

TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only)

and Hz are alternately selected, and

V/Hz, , Temperature, and A/Hz Measurements

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V/Hz, , Temperature, and A/Hz Measurements

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V
Tem p



A

~

R

x

Current

003.50

A

1:1000

A

DC

003.50

A

1:1000

A

DC

AC

TRMS

A

A

FUNC

ENTER

R

i

Ri = 9 M



METRAHIT AM TECH / TECH

COM

V
Tem p



V

~

R

x

Hz

Current

R

i

Ri ~ 1 M



METRAHIT AM BASE / BASE

mA

METRAHIT AM BASEBASE

METRAHIT AM TECH / TECH

V

V

5.7.3 Direct and Pulsating Current Measurement with Clip-On Current Sen­sor, A DC and A (DC+AC) (
METRAHITAM BASE / B

METRAHIT AM TECH / TECH and

ASE

only)

(default setting: METRAHIT AM TECH / TECH: OFF, METRAHITAM BASE / BASE:

1:1000)

Transformer Output, Voltage/Current

When a clip-on current sensor is connected to the multimeter
(METRAHIT AM TECH / T

ECH: V input, METRAHITAM BASE / BASE: V in-

put), all current displays appear with the correct value in accord­ance with the selected transformation factor.

The only prerequisite is
that the current sensor is equipped with at least one of the below listed
transformation factors, and that the factor has been previously selected

Cl ip 

0FF

in the following menu (

), see also chapter 6.4.

Current Clip Setup Menu

1nFo

 ...  SET rAtE  ...  CLIP

1 / 10/100/1000 / 0ff

Trans. Factors

CL IP

1:1

1 mV / 1 mA

1:10

1m V / 10 mA

1:100

1m V / 100 mA

1:1000

1 mV / 1 A

Maximum allowable operating voltage is equal to the current

Measuring Ranges DMM Clip Types

100 mV 1 V 10 V

100.00 mA 1.0000 A 10.000 A WZ12C

1.0000 A 10.000 A 100.00 A

10.000 A 100.00 A 1000.0 A

100.00 A 1000.0 A (10000.0 A)

transformer’s nominal voltage. When reading the measured value,
additional error resulting from the clip-on current sensor must also
be taken into consideration.

42 GMC-I Messtechnik GmbH



WZ12B, Z201A/B,
METRAFLEX

Z202A/B,
METRAFLEX

Z202A/B, Z203A/B,
WZ12C,
METRAFLEX

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V/Hz, , Temperature, and A/Hz Measurements

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

A~

Hz

003.50

A

AC

TRMS

A~

Hz

1:1000

050.10

Hz

AC

1:1000

FUNC

ENTER

COM

V
Tem p



V

~

R

x

Hz

Current

R

i

Ri ~ 1 M



METRAHIT AM BASE / BASE

COM

V
Tem p



A

~

R

x

Current

R

i

Ri = 1 M9 M



METRAHIT AM TECH / TECH

mA

METRAHIT AM BASE / BASE

METRAHIT AM TECH / TECH

V~

Hz

1M

1kHz

V~

Ri = 1 M



Ri = 9 M



5.7.4 Alternating Current Measurement with Clip-On Current Sensor
A AC and Hz (METRAHIT AM TECH / T
B

ASE only)

Transformer Output, Voltage/Current

When a clip-on current sensor is connected to the multimeter
(METRAHIT AM TECH / T
put), all current displays appear with the correct value in accord­ance with the selected transformation factor.
that the current sensor is equipped with at least one of the below listed
transformation factors, and that the factor has been previously selected
in the following menu (

Current Clip Setup Menu

Trans. Factors

CL IP

1:1

1 mV / 1 mA

1:10

1m V / 10 mA

1:100

1m V / 100 mA

1:1000

1 mV / 1 A

Maximum allowable operating voltage is equal to the current
transformer’s nominal voltage. When reading the measured value,
additional error resulting from the clip-on current sensor must also
be taken into consideration.

GMC-I Messtechnik GmbH 43

ECH and METRAHITAM BASE /

ECH: V input, METRAHITAM BASE / BASE: V in-

The only prerequisite is

Cl ip 

0FF

), see also chapter 6.4.

1nFo

 ...  SET rAtE  ...  CLIP

1 / 10/100/1000 / 0ff 

Measuring Ranges DMM Clip Types

100 mV 1 V 10 V

100.00 mA 1.0000 A 10.000 A WZ12C

1.0000 A 10.000 A 100.00 A

10.000 A 100.00 A 1000.0 A

100.00 A 1000.0 A (10000.0 A)

WZ12B, Z201A/B,
METRAFLEX

Z202A/B,
METRAFLEX

Z202A/B, Z203A/B
WZ12C,
METRAFLEX

(default setting:

1:1000)

,

METRAHIT AM TECH / TECH: OFF, METRAHITAM BASE / BASE:

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V/Hz, , Temperature, and A/Hz Measurements

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V
Tem p



A

~

R

x

Current

003.50

A

1:1000

A

DC

003.50

A

1:1000

A

DC

AC

TRMS

FUNC

ENTER

R

i

Ri 1



METRAHIT AM TECH / TECH

mA

A

A

A~

Hz

A~

Hz

003.50

A

AC

TRMS

050.10

Hz

AC

FUNC

ENTER

5.7.5

Direct, Pulsating and Current Measurement
Transformer A DC, A (DC+AC), A AC and Hz (METRAHIT AM TECH /
TECH only)

Transformer Output, Current/Current

When a clip-on current transformer is connected to the multimeter
(METRAHIT AM TECH / T

ECH: mA/A input), all current displays ap-

pear with the correct value in accordance with the selected trans­formation factor. The only prerequisite is that the current transfor­mer is equipped with at least one of the below listed transforma­tion factors, and that the factor has been previously selected in
the following menu

(Cl ip 0FF), see also chapter 6.4.

Current Clip Setup Menu

1nFo

 ...  SET rAtE  ...  CLIP

with Clip-On Current

1 / 10/100/1000 / 0ff

Trans. Factors

CL IP

1:1

1mA/1mA

1:10

1mA/10mA

1:100

1mA/100mA

1:1000

1 mA/1 A

(default setting: METRAHIT AM TECH / TECH: OFF)

44 GMC-I Messtechnik GmbH

Measuring Ranges DMM Clip Types

100 mA 1 A 10 A

100,00 mA 1,0000 A 10,000 A

1,0000 A 10,000 A 100,00 A

10,000 A 100,00 A 1000,0 A

100,00 A 1000,0 A (10000,0 A)



WZ12A, WZ12D,
WZ11A, Z3511,
Z3512, Z3514

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Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

6 Device and Measuring Parameters

The instrument’s “SET ” mode (menu mode) makes it possible to
set operating and measuring parameters, query information and
activate the interface.

➭ The menu mode is accessed by pressing the MEASURE | SETUP

key, assuming that the instrument is switched on and set to
“Measure” (measuring mode operation).
“1nFo ” appears at the display.

➭ The main menus, i.e. the “SET ” and “tEMP ” menus, as well as

the “SEnd ” and “StorE ” menus included with the METRA HIT
AM XTRA / X-
the display is returned to “1nFo” by activating the
(in any direction).

➭ After selecting the desired main menu, sub-menus are

accessed by pressing the FUNC | ENTER key.

➭ The desired parameter is selected by repeatedly pressing the

 or  key.

➭ In order to check or change a parameter, acknowledge it with

the FUNC | ENTER key.

➭ The

position.
The desired value is selected with the help of the

➭ Changes can only be accepted with the FUNC | ENTER key.

➭ You can return to the sub-menu without making any changes

by pushing the ZERO | ESC key, and to the main menu by press­ing the same key once again etc.

➭ You can switch to the measuring mode from any menu level by

pressing the FUNC | ENTER key.

TRA / OUTDOOR / SECULIFEHITAM/MD, are accessed, and

  keys

  keys can be used to position the cursor at the entry

 keys.

After repeatedly pressing the MEASURE | SETUP key (without first
turning the multimeter off), you can return to the last selected
menu or parameter from the measuring mode.

Example: Setting Time

 ...  set rAte  ...  t iME

1nFo

10:24 (hh:mm)

 

Setting hours and minutes:

 
 Change the setting, the entry position blinks.

Advance to desired entry position.

Press and hold the key

to change the setting rapidly.

The new time setting is activated after
acknowledgement.

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Device and Measuring Parameters

bAtt:
VerSion

:

1tEMP:
dAtE:
t iME:
0CCvP: *

1nFo

tEMPSEnd

* SET StorE *

*

METRAHIT AM XTRA

/

X-

TRA

/

O

UTDOOR

/

SECULIFEHITAM/MD only

** METRAHIT AM BASE / BASE only

StArt

StoP

000.0

CLEAr
StArt/

StoP

Sub-Menus / Parameters 

rAtE *

0.diSP
A

.diSP

APoFF

bEEP
irStb

*

Addr *

dAtE

tiME
CLiP **

C
F

Main Menus 

Query Set Set Set Set

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

1nfo

MEASURE

SETUP

020.00

V

DC

AC

TRMS

Selection

FUNC

ENTER

Selection

FUNC

ENTER

Selection

FUNC

ENTER

Selection

FUNC

ENTER

6.1 Paths to the Various Parameters 6.2 List of All Parameters

Parameter

AM
XTRA
X

TRA

AM
TECH
T

ECH

AM
PRO
P

AM

Page: Header

BASE

RO

B

ASE

0.diSP 48: 0.diSP – show/hide leading zeros
Addr

 ———

53: Configuring Interface Parameters

A.diSP 49: A.diSP – analog display: select display mode
APoFF

bAtt
bEEP
CLEAr






 ———

CLIP

—  — 

dAtE
EMpty

1nfo
irStb
1tEMP
0CCvP

rAtE

SEnd
SET
StArt
StoP
store
tEMP
t iME
vErSion

GMC-I Messtechnik GmbH 47



 ———


 ———


 ———

 ———
 ———


 ———
 ———
 ———




49: APoFF – specified time for automatic shutdown
and continuous ON

48: bAtt – query battery voltage
49: bEEP – set the limit value for continuity testing
23: Measurement Data Recording (METRAHIT

AM XTRA / X-TRA / OUTDOOR and SECULIFEHITAM/

MD only)

42:

Direct and Pulsating Current Measurement with

Clip-On Current Sensor, A DC and A (DC+AC)

METRAHIT AM TECH

(

/ B

ASE ONLY

)

48: dAtE – query date, 50: dAtE – enter date
23: Measurement Data Recording (METRAHIT

AM XTRA / X-TRA / OUTDOOR and SECULIFEHITAM/

MD only)

48: Querying Parameters – InFo Menu (as moving letters)
53: Configuring Interface Parameters
48: ItEMP – query reference temperature
23: Measurement Data Recording (

TRA

/

O

UTDOOR

48: rAtE – set the sampling rate (AM XTRA /

DOOR

/ HITAM/MD only)

52: Activating the Interface
48: Entering Parameters – SETUP Menu

23: Measurement Data Recording (METRAHIT

AM XTRA / X-

MD only)

36: Temperature Measurement
48: tiME – query time, 50: tiME – set time
48: vErSion – query firmware version

/ T

ECH AND

METRAHITAM BASE

and

SECULIFEHITAM/MD only)

TRA / OUTDOOR and SECULIFEHITAM/

METRAHIT AM XTRA

X-

TRA

/

/ OUT-

X-

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Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

6.3 Querying Parameters – InFo Menu (as moving letters)

bAtt – query battery voltage

:

1nFo bAtt

2.75 V.

vErSion – query firmware version

1nFo bAtt:  vErSion: 2.09

ItEMP – query reference temperature

The temperature of the internal reference junction is measured with a
temperature sensor in close proximity to the input sockets.

1nFo bAtt:  ... 

1tEMP: 24 °

C

dAtE – query date

1nFo bAtt:  ... 

D = day, M = month, Y = year

dAtE: 31.12.

05 (DD.MM.YY)

Date and time must be reentered after replacing the batteries.

tiME – query time

1nFo bAtt

t iME: 13:46:

56

: 

... 

(hh:mm:ss)

h = hours, m = minutes, s = seconds

Date and time must be reentered after replacing the batteries.

OCCUP – query memory occupancy (

AM XTRA / X-

TRA

/ O

UTDOOR

/ HITAM/MD

only)

1nFo bAtt:  ... 

0CCUP:

000.0

%

6.4 Entering Parameters – SETUP Menu

rAtE – set the sampling rate (

AM XTRA / X-

TRA

/ O

UTDOOR

/ HITAM/MD only)

The sampling rate specifies the time interval after which the
respective measured value is transmitted to the interface, or to
measured value memory.

Any one of the following sampling rates can be selected:
00:00.1, 00:00.2, 00:00.5, 00:01.0, 00:02.0, 00:05.0
[h:mm:ss.t] (h = hours, m = minutes, s = sec.,

t = tenths of a sec.

0:00:10, 0:00:20, 0:00:30, 0:00:40, 0:00:50, 0:01:00, 0:02:00,
0:05:00, 0:10:00, 0:20:00, 0:30:00, 0:40:00, 0:50:00, 1:00:00,
2:00:00, 3:00:00, 4:00:00, 5:00:00, 6:00:00, 7:00:00, 8:00:00,
9:00:00

Setting the Sampling Rate

1nFo



... 

SET rAtE

00:00.1 ... 00:00.5 ... 9:00:00 

(00:00.5 = 0.5 seconds = default value)

0.diSP – show/hide leading zeros

This parameter determines whether or not leading zeros will
appear in the measured value display.

1nFo



... 

SET rAtE  ...  0.diSP

0000.0 : with leading zeros (default setting)

0.0 : leading zeros suppressed

)



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Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

A.diSP – analog display: select display mode

One of two different display modes can be selected for the
analog display:

• bArG: bar graph

• Point: pointer

 ...  SET rAtE  ...  A.diSP

1nFo

bArG / Point



(bArG = default value)

APoFF – specified time for automatic shutdown and continuous ON

The instrument is switched off automatically if the measured value
remains unchanged for a long period of time, and if none of the
keys or the rotary switch have been activated before the specified
time “APoFF ” (entered in minutes) has elapsed.

If the on setting is selected, the multimeter is set to continuous
operation and

ON appears in the display to the right of the battery

symbol. In this case, the multimeter can only be switched off
manually. The “on ” setting can only be cancelled by changing the
respective parameter, and not by switching the instrument off.

 ...  SET rAtE  ...  APoFF

1nFo

bEEP – set the limit value for continuity testing

1nFo

 ...  SET rAtE  ...  bEEP

1, 10, 20, 30, 40, 90 



(10 = default setting)

irStb – status of the infrared receiver in the stand-by mode (METRAHIT
AM XTRA / X-

TRA / OUTDOOR / SECULIFEHITAM/MD only)

See chapter 7.2 on page 53 regarding settings.

Addr – select device address (METRAHIT AM XTRA / X-TRA / OUTDOOR /
SECULIFEHITAM/MD only

See chapter 7.2 on page 53.

10 ... 59 min on



(10 minutes = default setting)

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Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

ZERO

ESC

ON / OFF

LIGHT

dAtE – enter date

Entering the current date makes it possible to acquire measured
values in real-time.

 ...  SET rAtE  ...  dAtE

1nFo

31.12 (DD: day . MM: month)

2005 (YYYY: year)

 

 

Date and time must be reentered after replacing the batteries.

tiME – set time

Entering the correct time makes it possible to acquire measured
values in real-time.

1nFo  ...  SET rAtE  ...  t iME

10:24 (hh:mm)  

Date and time must be reentered after replacing the batteries.

CLIP – set transformation factor (METRAHIT AM TECH / TECH and
METRAHITAM BASE / BASE only)

See chapter 5.7.3 ff.

6.5 Default Settings

Previously entered changes can be undone, and the default
settings can be reactivated. This may be advisable under the
following circumstances:

• After the occurrence of software or hardware errors

• If you are under the impression that the multimeter does not
work correctly

➭ Disconnect the device from the measuring circuit.

➭ Remove the batteries temporarily (see also chapter 9.2).

➭ Simultaneously press and hold

the and keys,

and reinsert the batteries at the same time.

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Interface Operation

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

7 Interface Operation (METRAHIT AM XTRA / X-TRA / OUTDOOR /

SECULIFEHIT

The METRAHIT AM XTRA / X-TRA / OUTDOOR is equipped with an infra-
red interface for the transmission of measurement data to a PC.
Measured data are optically transferred through the instrument
housing by means of infrared light to an interface adapter (acces­sory), which is
attached to the multimeter. The adapter’s USB interface allows for
the establishment of a connection to the PC via an interface cable.
Beyond this, commands and parameters can be transmitted from
the PC to the multimeter as well. The following functions can be
executed:

• Configuration and read-out of measuring parameters

• Measuring function and measuring range selection

• Start measurements

• Read out stored measured values

7.1 Activating the Interface

The interface is automatically activated for receiving operation
(multimeter receives data from the PC) as soon as the interface is
addressed by the PC, assuming that the “irStb ” parameter has
been set to “ir on ” (see chapter 7.2), or the instrument is already
switched on (the first command wakes up the multimeter, but
does not yet execute any further commands).

The “continuous transmission” operating mode is selected
manually as described below. In this operating mode, the
instrument continuously transmits measurement data to the PC
via the interface adapter, which can then be displayed with the
help of a terminal program.

AM/MD only)

Starting Continuous Transmission Operation with Menu Functions

 ...  SEnd StArt send

1nFo

The symbol blinks at the display in order to indicate interface
operation.

Stopping Continuous Transmission Operation with Menu Functions

1nFo

 ...  SEnd send

stop send

The symbol is cleared from the display.

Automatic Activation and Deactivation of Transmission Mode Operation

If the sampling rate is 10 seconds or longer, the display is
switched off automatically between samples in order to prolong
battery service life. The only exception is when the multimeter is
set to continuous operation.
As soon as an event occurs, the display is automatically switched
back on.

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Interface Operation

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

7.2 Configuring Interface Parameters

irStb – status of the infrared receiver in the stand-by mode

There are two possible switching statuses for the infrared
interface when the multimeter is switched off:

ir on: IR appears at the display and the infrared interface is

active, i.e. signals such as making commands can be
received, and power is consumed even though the
multimeter is switched off.

ir oFF: IR does not appear at the display and the infrared

interface is switched off, signals cannot be received.

 ...  SET rAtE  ...  irStb

1nFo

ir on / ir oFF 

(irstb = ir oFF = default setting)

Addr – Address

If several multimeters are connected to the PC via an interface
adapter, a separate address can be assigned to each instrument.
Address number 1 should be selected for the first instrument, 2
should be assigned to the second and so forth.

1nFo

 ...  SET rAtE  ...  Addr

00 ... 01 ... 15



(15 = default setting)

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Technical Data

PRO

AM XTRA/X-

TRA

OUTDOOR

TECH

AM TECH

8 Technical Data

Meas.

Function

O

AM TECH

AM TECH

AM TECH

AM BASE

1)

2)

3)

54 GMC-I Messtechnik GmbH

Measuring Range

100 mV 10 V 9M9M // < 50 pF 0.09 + 5 with ZERO 1 + 30 (> 300 d) 1)1 + 30 (> 300 d)

1 V 100 V 9M9M // < 50 pF 0.05 + 3 0.5 + 9 (> 200 d) 1 + 30 (> 300 d)

V

10 V 1 mV 9M9M // < 50 pF 0.05 + 3 0.5 + 9 (> 200 d) 1 + 30 (> 300 d)

100 V 10 mV 9M9M // < 50 pF 0.05 + 3 0.5 + 9 (> 200 d) 1 + 30 (> 300 d)

1000 V 100 mV 9M9M // < 50 pF 0.09 + 3 0.5 + 9 (> 200 d) 1 + 30 (> 300 d)

A

AM XTRA

X-TRA

UTDOOR

AM PRO

PRO

A

TECH

Factor: 1:1/10/100/1000

A

TECH

A

TECH

BASE

Values of less than 200 digits are suppressed in the mV range.
At 0  ... + 40 C
Display up to max. 5.1 V, “OL” in excess of 5.1 V.

0.1/1/10/100 A 100 mA

1/10/100/1000 A 1 A 0.2 A continuous

10/100/1000/10000 A

0.1/1/10/100 A 100 mV

1/10/100/1000 A 1 V

10/100/1000/10000 A

100  10 m < 1.4 V Approx. 300 A 0.2 + 5

1k 100 m < 1.4 V Approx. 250 A 0.2 + 5

10 k 1  < 1.4 V Approx. 100 A 0.2 + 5



100 k 10  < 1.4 V Approx. 12 A 0.2 + 5

1M 100  < 1.4 V Approx. 1.2 A 0.2 + 5
10 M 1k < 1.4 V Approx. 125 nA 0.5 + 10
40 M 10 k < 1.4 V Approx. 20 nA 2.0 + 10

100  —0.1 Approx . 8 V Approx. 1 mA const. 3 + 5

5.1 V

Resolution at Upper

Range Limit

11,999 1199

100 A 10 nA 12 mV 12 mV 0.5 + 5 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)

1 mA 100 nA 120 mV 120 mV 0.5 + 3 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)

10 mA 1 A 16 mV 16 mV 0.5 + 3 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)

100 mA 10 A 160 mV 160 mV 0.5 + 3 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)

1 A 100 A 40 mV 40 mV 0.9 + 10 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)

10 A 1 mA 600 mV 600 mV 0.9 + 10 1.5 + 10 (> 200 d) 1.5 + 30 (> 200 d)
10 mA 1 A 16 mV 16 mV 0.1 + 5 1 + 10 (> 200 d) 1.5 + 30 (> 200 d)

100 mA 10 A 160 mV 160 mV 0.1 + 5 1 + 10 (> 200 d) 1.5 + 30 (> 200 d)

1 A 100 A 40 mV 40 mV 0.9 + 10 1 + 10 (> 200 d) 1.5 + 30 (> 200 d)

10 A 1 mA 600 mV 600 mV 0.9 + 10 1 + 10 (> 200 d) 1.5 + 30 (> 200 d)

Input Input impedance

10 A plus clip-on current sensor error

10 V Plus clip-on current sensor error

3)

— 1 m V Approx. 8 V Approx . 1 mA const. 0. 5 + 3

Voltage drop, approx. at upper range limit

Open-circuit voltage

Input Impedance

~ /

Current measuring input

(A socket)

Voltage measurement input

ECH: (V socket) Ri =1 M/9 M

T

BASE: ( V socket) Ri ~1 M

Meas. curr. @ range limit

(0.5% rdg. + 10 d)

Intrinsic Errorunder Reference Conditions

(... % rdg. + ... d) (... % rdg. + ... d) (... % rdg. + ... d)

Specification see current ranges A (T

(... % rdg. + ... d)

with active ZERO function

4)

Residual value deviates within 1 ... 30 d from the zero point due to TRMS converter
when probe tips are short-circuited. See frequency influence on page 56.

5)

Switch-off time/Cool-down time > 30 min and TA  40 C

4)

~

4)

~

(1% rdg. + 30 d)

> 300 d

4)

4)

ECH)

(1% rdg. + 30 d)

> 300 d

Overload Capacity

Value Time

1)

1000 V

DC

AC

RMS

sine

0.2 A

10 A:  5 min

16 A:  30 s

0.2 A
10 A:  5 min

16 A:  30 s

Measuring input

10 A: 5 min

Measurement input

1000 V RMS Max. 10 s

1000 V

DC

AC

RMS

sine

continuous

continuous

5)

5)

continuous

5)

5)

Max. 10 s

2)

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Technical Data

Meas.

Function

F

AM XTRA

X-TRA

O

UTDOOR

AM TECH

TECH

Hz (V)
Hz (A)

Hz (A )

Hz (V)
Hz (A)

MHz

AM XTRA

X-TRA

O

UTDOOR

%

AM XTRA

X-TRA

O

UTDOOR

Measuring Range

Resolution at Upper

Range Limit

Input impedance

Intrinsic Error under Reference Conditions

11,999 1199 ~ / Value Time

10 nF 10 pF 10 M 0.7 V 1 + 6

Discharge resistance U

0 max

100 nF 100 pF 1 M 0.7 V 1 + 6

1 F 1 nF 100 k 0.7 V 1 + 6

10 F10nF12k 0.7 V 1 + 6

100 F 100 nF 3 k 0.7 V 5 + 6

1000 F1F3k 0.7 V 5 + 6

7)

f

min

(... % rdg. + ... d)

(... % rdg. + ... d)

6)

with ZERO function active

6)

6)

6)

6)

6)

100.00 Hz 0.01 Hz

1.0000 kHz 0.1 Hz

10.000 kHz 1 Hz

1Hz

0.05 + 3

10)

100.00 kHz 10 Hz 10 Hz

30.00 kHz 10 Hz 10 Hz

100 Hz ... 1 MHz

0.01 ...
100 Hz

1 ... 100 Hz 0.05 + 3 > 2 V ... 5 V

2.0 ... 98% — 0.01% 100 Hz ... 1 kHz 1 Hz 0.1 R per kHz > 2 V ... 5 V

5.0 ... 95% — 0.01% ... 10 kHz 1 Hz 0.1 R per kHz > 2 V ... 5 V

10... 90% — 0.01% ... 100 kHz 1 Hz 0.1 R per kHz > 2 V ... 5 V

Overload Capacity

2)

1000 V

DC
AC

Max. 10 s
RMS
Sine

Hz (V) 8):

Hz(A )8):

1000 V

Max. 10 s

9

)

Hz (A):

1000 V Max. 10 s

(... % rdg. + ... d)

Pt100

– 200.0 ...

X-TRA

+850.0 C

OUTD.

Pt1000

C/F

2)

At 0  ... + 40 C

6)

Applies to measurements at film capacitors

7)

Lowest measurable frequency for sinusoidal measuring signals symmetrical to the zero point

8)

Overload capacity of the voltage measurement input:
power limiting: frequency x voltage, max. 3 x 10

X-TRA

OUTD.

K

(NiCr-Ni)

– 150.0 ...
+850.0 C

– 250.0 ...

+1372.0 C

0.1 C

6

V x Hz for U > 100 V

9)

Overload capacity of the current measurement input:

See current measuring ranges for maximum current values.

10)

Input sensitivity, sinusoidal signal, 10% to 100% of the measuring range

11)

Plus sensor deviation

Key: R = meas. range, d = digit(s), rdg. = measured value (reading)

0.3 + 15

0.3 + 15

1% + 5 K

11)

1000 V

DC/AC

11)

11)

RMS
Sine

Max. 10 s

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Technical Data

Influencing Quantities and Influence Error

Influencing

Quantity

Tem p er at ur e

1)

With zero balancing

Influencing

Quantity

DATA V A, , Hz 10 d
MIN / MAX V A, , Hz 30 d

Sphere of

Influence

0 C ... +21 C

and

+25 C... +40 C

Measuring Quantity

Measured Quantity /

Measuring Range

V 0.2 + 10

V 0.4 + 10

100  ... 1 M 0.5 + 10

> 1 M 1 + 10

mA/A 0.5 + 10

mA/A 0.8 + 10

10 nF ... 100 F1 + 5

Hz 0.2 + 10

C/F (Pt100/Pt1000) 0.5 + 10
C/F thermocouple K 0.2 + 10

Influence Error

(...% rdg. + ... d)

1)

(...% rdg. + ... d) / 10 K

Influence Error

Intrinsic Error

 ... % rdg. + ... d)

METRAHIT AM XTRA

Influencing

Quantity

Frequency

2)

Power limiting: frequency x voltage max. 3 x 106 V x Hz for U > 100 V

3)

The accuracy specification for frequency response is valid within a dis-

Meas. Quantity/

Meauring

Range

100.00 mV

1.0000 V

V

...

AC

100.00 V

1000.0 V

2)

100.00 A

...

A

AC

10.0000 A

100 mV /

A

AC

1 V / 10 V

Sphere of Influence

> 15 Hz ... 45 Hz 3 + 30 3 + 30

> 65 Hz ... 1 kHz 2 + 30 3 + 30

> 1 kHz ... 10 kHz 3 + 30 —

> 15 Hz ... 45 Hz 2 + 9 3 + 9

> 65 Hz ... 1 kHz 1 + 9 3 + 9

> 1kHz...10/20kHz

> 15 Hz ... 45 Hz 2 + 9 3 + 9

> 65 Hz ... 1 kHz 2 + 9 3 + 9

> 1 kHz ... 10 kHz 3 + 30 —

> 15 Hz ... 45 Hz

> 65 Hz ... 10 kHz

> 65 Hz ... 1 kHz — 3 + 10

METRAHIT X-

METRAHIT O

METRA HIT AM TECH

METRAHIT AM PRO

SECULIFEHITAM/

4)

TRA

UTDOOR

METRAHIT T

ECH

RO

METRAHIT P

MD

3 + 9 —

3 + 10 —

3)

METRAHIT AM BASE

METRAHIT BASE

play value range of 10% to 100% of the measuring range for both mea­suring modes with the TRMS converter in the AC and (AC+DC) ranges.

4)

METRAHIT AM XTRA / X-TRA / OUTDOOR /
SECULIFEHIT

METRA HIT AM TECH / TECH: Frequency response up to 10 kHz,
METRAHIT AM PRO / PRO: Frequency response up to 10 kHz,
METRAHIT AM BASE / BASE: Frequency response up to 1 kHz

AM/MD: Frequency response up to 20 kHz,

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Technical Data

Influencing

Quantity

Crest factor CF

5)

Except for sinusoidal waveshape

Influencing Qty. Sphere of Infl. Measured Quantity Influence Error

Relative
humidity

Influencing

Quantity

Common Mode
Interference
Voltage

Series Mode
Interference
Voltage

Sphere of

Influence

1 ... 3

> 3 ... 5  3% rdg.

75%

3 days

instrument off

Sphere of Influence

Interference quantity max. 1000 V V > 120 dB

Interference quantity max. 1000 V

50 Hz ... 60 Hz, sine

Interference quantity: V ,, respective

nominal value of the meas. range,

max. 1000 V , 50 Hz ... 60 Hz, sine

Interference quantity max. 1000 V V > 110 dB

Measured Quantity /

Measuring Range

V, A

V A, , Hz, C1 x intrinsic error

Measured Quantity /

Measuring Range

1 V , 10 V > 80 dB

Influence Error

 1% rdg.

Damping

100 V > 70 dB

1000 V > 60 dB

V> 50dB

5)

Reference Conditions

Ambient temperature +23C 2K
Relative humidity 40 ... 75%
Measured qty. frequency 45 ... 65 Hz
Measured qty. waveshape sine
Battery voltage 3 V 0.1 V

Response Time (after manual range selection)

Measured Quantity /

Measuring Range

V, V

AV , A

100  ... 1 M 2s

10/40 M 5s

Continuity < 50 ms
C (Pt100) max. 3 s

10 nF ... 100 Fmax. 2s

1 000 Fmax. 7s

>10 Hz 1.5 s

Response Time

Digital Display

1.5 s

1.5 s

Measured Quantity Jump Function

From 0 to 80%

of upper range limit value

From  to 50%

of upper range limit value

From 0 to 50%

of upper range limit value

Internal Clock

Time format TT.MM.JJJJ hh:mm:ss
Resolution 0.1 s
Accuracy 1 minute per month
Temperature

influence 50 ppm/K

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Technical Data

Data Interface
(METRAHIT AM XTRA / X-

Type Optical via infrared light through the

Data transmission
(data transfer) Serial, bidirectional (not IrDa compatible)

Protocol Device specific
Baud Rate 38,400 baud
Functions – Select/query measuring functions and

The USB X-TRA plug-in interface adapter (see accessories) is
used for adaptation to the PC’s USB port.

TRA / OUTDOOR / SECULIFEHITAM/MD only)

housing

parameters

–

Query/transmit momentary measurement
data

– Read out stored measurement data

Internal Measured Value Storage
(METRAHIT AM XTRA / X-

TRA / OUTDOOR and SECULIFEHITAM/MD

only)

Memory capacity 4 MBit / 540 kB for approx. 15,400

measured values with time stamp

Power Supply

Battery 2 ea. 1.5 V mignon cell (2 ea. size AA),

Service life With alkaline manganese: approx. 200

Battery test Battery capacity display with battery

Power OFF function The multimeter is switched off

Power pack connector socket
(

METRAHIT AM XTRA

alkaline manganese per IEC LR6
(2 ea. 1.2 V NiMH rechargeable battery
also possible)

hours

symbol in 4 segments: .
Querying of momentary battery voltage via
menu function.

automatically:
– If battery voltage drops to below approx.

1.8 V

– If none of the keys or the rotary switch

are activated for an adjustable duration
(10 to 59 min.), and the multimeter is not
in the continuous operating mode

/

X-TRA / OUTDOOR / SECULIFEHITAM/MD only)

If the NA X-TRA power pack (see
accessories) has been plugged into the
instrument, the batteries are disconnected
automatically.
Rechargeable batteries can only be
recharged externally.

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Technical Data

Display

LCD panel (65 mm x 36 mm) with analog and digital display
including unit of measure, type of current and various special
functions

Background illumination

Background illumination is switched off approximately 1 minute
after it has been activated.

Analog

Display LCD scale with bar graph or pointer,

Scaling With 4 division lines each

Polarity display With automatic switching
Overflow display With the symbol
Measuring rate 40 per second and display refresh

Digital

Display / Char. Height
Number of places 4½ place 11,999 steps
Overflow display “0L” is displayed for 12,000 digits
Polarity display “–” (minus sign) is displayed

Measuring rate 10 measurements per second;

Refresh Rate 2 times per sec., every 500 ms

depending upon A.diSP parameter setting

1 bar/pointer corresponds to 500 digits at
the digital display

(U and I)

7-segment characters / 15 mm

if plus pole is connected to “”

40 per second with Min/Max function
except with capacitance, frequency and
duty cycle measuring functions

Acoustic Signals

For voltage Intermittent signal at above 1000 V
For current Intermittent signal at above 10 A

Continuous signal at above 16 A

Fuse for METRAHIT AM X-TRA / AM TECH / AM PRO
METRAHIT X-

Fuse FF (UR) 10 A/1000 V AC/DC,

TRA

/ O

UTDOOR

/ T

ECH

/ PRO

/ SECULIFEHITAM/

10 x 38 mm,
switching capacity:
30 kA at 1000 V AC/DC,
protects the current input socket in the
100 A to 10 A ranges

MD

Electrical Safety

per IEC 61010-1:2010/DIN EN 61010-1:2011/VDE 0411-1:2011

Safety class
Fouling factor
Test voltage

METRAHIT AM X-TRA / AM TECH / AM PRO / AM BASE
METRAHIT X-TRA / OUTDOOR / TECH / PRO / BASE

Measuring category III IV
Operating voltage 1000 V 600 V

SECULIFEHIT

Measuring category III IV
Operating voltage 600 V 300 V

AM/MD

II
2

6.7 kV~

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Technical Data

Electromagnetic Compatibility (EMC)

Interference emission
Interference immunity

EN 61326-1:2013, class B
EN 61326-1:2013
EN 61326-2-1:2013

Ambient Conditions

Operating
temp. range T

A

Storage
temp. range 25 C ... + 70 C (without batteries)

Relative humidity Max.75%, no condensation allowed,

Elevation to 2000 m
Deployment

10 C ... +50 C

METRAHIT O

UTDOOR &

SECULIFEHITAM/MD

max. 96 %

Indoors; outdoors only within specified
ambient conditions

only:

Mechanical Design

Housing Impact resistant plastic (ABS)
Dimensions 200 x 87 x 45 mm

Weight Approx. 0.35 kg with batteries
Protection Housing: IP 52

Table Excerpt Regarding Significance of the IP Code

IP XY

(1st digit X)

Protection against pene-

tration of solid particles

5 Dust protected 2 Dripping (15 inclination)
6 Dust-proof 5 Jet-water

(without protective rubber cover)

Extension of the

METRAHIT O

UTDOOR

SECULIFEHITAM/MD:

Housing: IP 65

IP XY

(2nd digit Y)

Protection against

penetration by water

&

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Maintenance – Calibration

Attention!

!

Note

Note

MEASURE

SETUP

FUNC

ENTER

9 Maintenance and Calibration

Disconnect the instrument from the measuring circuit before
opening the battery compartment lid or fuse cover in order
to replace batteries or fuses!

9.1 Displays – Error Messages

Message Function Meaning

FUSE

0L

9.2 Batteries

Current measurement Blown fuse

In all operating modes Battery voltage has fallen below 1.8 V

Measurement Indicates overflow

Removing the Batteries During Periods of Non-Use

The integrated quartz movement draws power from the
batteries even when the instrument is switched off. It is
advisable to remove the batteries during long periods of
non-use for this reason (e.g. vacation). This prevents
excessive depletion of the battery, which may result in
damage under unfavorable conditions.

ware before replacing the batteries.
The selected operating parameters remain in memory,
although date and time must be reentered.

Battery

The current battery charge level can be queried in the “1nfo”
menu:

:

1nFo bAtt

2.75 V.

Make sure that no battery leakage has occurred before initial
start-up, as well as after long periods of storage. Continue to
inspect the batteries for leakage at short, regular intervals.

If battery leakage has occurred, carefully and completely clean the
electrolyte from the instrument with a damp cloth, and replace the
batteries before using the instrument.

If the “ ” symbol appears at the display, the batteries should
be replaced as soon as possible. You can continue working with
the instrument, but reduced measuring accuracy may result.

The instrument requires two 1.5 V batteries in accordance with
IEC R 6 or IEC LR 6, or two equivalent rechargeable NiCd
batteries.

Battery Replacement for METRAHIT AM XTRA / X-TRA / OUTDOOR /
SECULIFEHITAM/MD

Stored measurement data are lost when the batteries are
replaced. In order to prevent data loss, it is advisable to
backup your data to a PC with the help of METRAwin 10 soft-

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Maintenance – Calibration

Attention!

!

Attention!

!

Blown Fuse

fuse

A

DC

Replacing the Batteries

Disconnect the instrument from the measuring circuit before
opening the battery compartment lid in order to replace the
batteries.

➭ Set the instrument face down onto the working surface.

➭ Turn the slotted screw on the lid with the battery symbols

counterclockwise.

➭ Lift off the lid and remove the batteries from the battery

compartment.

➭ Insert two new 1.5 V mignon batteries into the battery

compartment, making sure that the plus and minus poles
match up with the provided polarity symbols.

➭ When replacing the battery compartment lid, insert the side

with the guide hooks first.
Tighten the screw by turning it clockwise.

➭ Please dispose of depleted batteries in accordance with

environmental protection regulations!

9.3 Fuse (METRAHIT AM XTRA / X­T

ECH

, METRAHIT AM PRO / PRO and SECULIFEHITAM/MD only)

Testing the Fuse

The fuse is tested automatically:

• When the instrument is switched on with the rotary switch in

the A position

• When the instrument is already on and the rotary switch is

turned to the A position

TRA

/ O

UTDOOR

, METRAHIT AM TECH /

• In the active current measuring range when voltage is applied
If the fuse is blown or has not been inserted, “FuSE” appears at

the digital display. The fuse interrupts the current measuring
ranges. All other measuring ranges remain functional.

Replacing the Fuse

If a fuse should blow, eliminate the cause of overload before
placing the instrument back into service!

Disconnect the instrument from the measuring circuit before
opening the fuse cover in order to replace the fuse!

➭ Set the instrument face down onto the working surface.

➭ Turn the slotted screw on the cover with the fuse symbol

counterclockwise.

➭ Lift off the cover and pry the fuse out using the flat side of the

fuse cover.

➭ Insert a new fuse. Make sure that the fuse is centered, i.e.

between the tabs at the sides.

➭ When replacing the fuse cover, insert the side with the guide

hooks first.
Tighten the screw by turning it clockwise.

➭ Dispose of the blown fuse with the trash.

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Maintenance – Calibration

Attention!

!

Note

Pb Cd Hg

Use specified fuses only!
If fuses with other blowing characteristics, other current
ratings or other breaking capacities are used, the operator
is placed in danger, and protective diodes, resistors and
other components may be damaged.
The use of repaired fuses or short-circuiting the fuse holder
is prohibited.

Testing the Fuse with the Instrument Switched On
After inserting the fuse with the instrument switched on, the
instrument must be switched off briefly and then switched
back on, or briefly switched to a non-current measuring
range and then back to the “A” measuring range.
If contact is poor or the fuse is blown, FUSE appears at the
display.

9.4 Housing Maintenance

No special maintenance is required for the housing. Keep outside
surfaces clean. Use a slightly dampened cloth for cleaning. Avoid
the use of cleansers, abrasives or solvents.

9.5 Return and Environmentally Sound Disposal

The instrument is a category 9 product (monitoring and control
instrument) in accordance with ElektroG: German electrical and
electronic device law). This device is subject to the RoHS
directive. Furthermore, we make reference to the fact that the cur­rent status in this regard can be accessed on the Internet at

y entering the search term WEEE.

We identify our electrical and electronic devices in ac­cordance with WEEE 2012/19/EU and ElektroG with
the symbol shown at the right per DIN EN 50419.

These devices may not be disposed of with the trash.

If you use batteries or rechargeable batteries in your instrument or
accessories which no longer function properly, they must be duly
disposed of in compliance with the applicable national regula­tions.
Batteries or rechargeable batteries may contain harmful sub­stances or heavy metal such as lead (PB), cadmium (CD) or mer­cury (Hg).

They symbol shown to the right indicates that batteries or
rechargeable batteries may not be disposed of with the
trash, but must be delivered to collection points specially
provided for this purpose.

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Maintenance – Calibration

9.6 Recalibration

The respective measuring task and the stress to which your mea­suring instrument is subjected affect the ageing of the compo­nents and may result in deviations from the guaranteed accuracy.

If high measuring accuracy is required and the instrument is fre­quently used in field applications, combined with transport stress
and great temperature fluctuations, we recommend a relatively
short calibration interval of 1 year. If your measuring instrument is
mainly used in the laboratory and indoors without being exposed
to any major climatic or mechanical stress, a calibration interval of
2-3 years is usually sufficient.

During recalibration* in an accredited calibration laboratory
(DIN EN ISO/IEC 17025) the deviations of your instrument in rela­tion to traceable standards are measured and documented. The
deviations determined in the process are used for correction of
the readings during subsequent application.

By having your measuring instrument calibrated regularly, you ful­fill the requirements of a quality management system per
DIN EN ISO 9001.

9.7 Manufacturer’s Guarantee

All METRA HIT digital multimeters and calibration instruments are
guaranteed for a period of 3 years after date of shipment. The
manufacturer’s guarantee covers materials and workmanship.
Damages resulting from use for any other than the intended pur­pose or operating errors, as well as any and all consequential
damages, are excluded.

The calibration certificate confirms that the product conformed to
the specified technical data at the time of calibration. We guaran­tee the observance of the specified technical data within the ad­missible tolerance limits for a period of 12 months from delivery.

* Verification of specifications or adjustment services are not part of the

calibration. For products from our factory, however, any necessary ad­justment is frequently performed and the observance of the relevant
specification is confirmed.

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Accessories

Attention!

!

10 Accessories

10.1 General

The extensive accessories available for our measuring instru­ments are checked for compliance with currently valid safety reg­ulations at regular intervals, and are expanded as required for new
applications. Currently up-to-date accessories which are suitable

Ambient Conditions (EN 61010-031)

Temperature – 20 C ... + 50C
Relative humidity 50 to 80%
Pollution degree 2

Application KS17-2/KS17-2AMB

( Products  Measuring Technology – Portable 
Multimeters  METRAHIT ...  Accessories).

10.2 Technical Data for Measurement Cables Electrical Safety of KS17-2 safety cable set

1000 V

Maximum Rated Voltage 600 V
Measuring Category

CAT IV CAT III CAT II

1000 V

Maximum Rated Current 1 A 1 A 16 A

with safety cap applied

without safety cap applied ——



—



Please observe the maximum values of the electrical supply
of the device.
In conformity with standard DIN EN 61010-031, measure­ments in an environment according to measuring category
III and IV may only be performed with the safety cap applied
to the test probe of the measurement cable.

For establishing contact in 4 mm jacks you have to remove the
safety cap by levering out the snap lock of the safety cap with an­other sharp object (e.g. the second test probe).

Please observe the maximum values of the electrical safety of the instrument.

Electrical Safety of KS17-2AMB safety cable set
(with antimicrobial properties, supply only with SECULIFEHITAM)

Maximum Rated Voltage 300 V
Measuring Category

CAT IV CAT III CAT II

600 V

600 V

Maximum Rated Current 1 A 1 A 16 A

with safety cap applied

without safety cap applied ——



10.3 NA X-TRA Power Pack (not included)

Use only the power pack from GMC-I Messtechnik GmbH in
combination with your instrument. This assures operator safety by
means of an extremely well insulated cable, and safe electrical
isolation (nominal secondary ratings: 5 V / 600 mA). Installed
batteries are disconnected electronically if the power pack is

—

used, and need not be removed from the instrument.



Please observe the maximum values of the electrical safety of the instrument.

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10.4

Interface Accessories for METRAHIT AM XTRA / X­SECULIFEHIT

AM

and SECULIFEHITMD (not included)

TRA

/ O

UTDOOR

,

USB X-TRA Bidirectional Interface Adapter

This adapter makes it possible to connect STARLINE multimeters
which are equipped with a serial IR interface to the USB port at a
PC. The adapter allows for data transmission
between the multimeter and the PC.

METRAwin 10 PC Analysis Software
METRAwin 10 PC software is a multilingual, measurement data log-

ging program* for recording, visualizing, evaluating and
documenting measured values from METRA HIT multimeters.

Details on the system requirements are given in the installation
instructions of METRAwin 10/METRAwin 45.

Accessories

* runs under any IBM compatible Windows operating system

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