Datasheet

2 GMC-I Messtechnik GmbH
METRA HIT AM BASE, AM PRO, AM TECH, AM XTRA
METRA HIT B
ASE, PRO, TECH, X-TRA
Advanced Multimeters
Automatic or Manual Measuring Range Selection
Measured quantities are selected by means of a rotary switch and
a function key. The measuring range is automatically matched to
the measured values. The measuring range can also be selected
and fixed manually with a key.
Fast Acoustic Continuity Test
Testing for short circuiting and int
erruption is possible with the
selector switch in the
position. The threshold value for 
acoustic signaling can be set to 1, 10, 20, 30, 40 or 90 .
Automatic Storage of Measured Values *
The DATA function automatically saves the digitally displayed mea-
sured value after settling in. Acoustic signali
ng is also used to indicate
whether the new measured value deviates from the initial reference
value by less or more than 0.1% of the measuring range.
* Patented
Storage of Min-Max Values
Comparable to the slave-pointer func
tion of an analog instrument,
the device saves the highest and lowest measured values after
the MIN/MAX function has been activated or reset. These extreme
values can be queried at the display.
Battery Charging Status – Power Saving Circuit
The battery charging status is indicated by means of four symbols.
The device is switched off automatically if the measured value
r
emains unchanged for a period of between 10 and 59 minutes
(adjustable), and if none of the controls are activated during this time.

Automatic shutdown can be deactivated by switching the 
instrument to continuous operation.
METRA HIT AM XTRA / X- TRA / O UTDOOR : The infrared interface can be
switched off in the standby mode.
Protective Cover for Harsh Conditions
The instrument is protected against damage in the event of impacts
or dropping by means of a soft rubber cover with tilt stand and test
probe holder. The rubber material also assures that the instrument
does not wander if it is set up on a vibrating surface.
Infrared Data Interface with METRA HIT AM XTRA / X-TRA / OUTDOOR
The device can be remote configured, and momentary and stored
measurement data can be read out via the bidirectional infrared
interface. The USBX-TRA interface adapter and METRA win 10 soft-
ware are required to this end (see accessories). Interface 
protocol and device driver software for LabVIEW
®
(National
Instruments™) are available upon request.
DAkkS Calibration Certificate
The multimeters are furnished with an internationally valid DAkkS 
calibration certificate (recognized by EA and ILAC). A fter the 
specified calibration interval has elapsed (recommended interval:
1
to 3 years), the multimeters can be inexpensively recalibrated in
our own DAkkS calibration laboratory.
Applicable Regulations and Standards
IEC/DIN EN 61 010 -1
VDE 0411-1
Safety requirements for electrical equipment for 
measurement, control and laboratory use
DIN EN 61 326-1
VDE 0843-20-1
Electrical equipment for measurement, c
ontrol and laboratory
use – EMC requirements – 
Part 1: General requirements
DIN EN 60 529
DIN VDE 0470-1
Test instruments and test procedures
– degrees of protection provided by enclosures (IP code)
Overview
Function
METRA HIT
AM XTRA
METRA HIT
X-
TRA / 
OUTDOOR
METRA HIT
AM TECH
METRA HIT
TECH
METRA HIT
AM PRO
METRA HIT
PRO
METRA HIT
AM BASE
METRA HIT
BASE
V AC / Hz TRMS
(Ri  9 M)

&
1kHz
Filter

&
1kHz
Filter

&
1kHz
Filter

V AC TRMS
(Ri = 1 M)

&
1kHz
Filter

&
1kHz
Filter

&
1kHz
Filter
—
V AC+DC TRMS 
(Ri  9 M)
   
V DC (Ri  9 M)
   
... 1 MHz 5 V AC
 — — —
Duty cycle as %
 — — —
Hz (V AC)
... 100 kHz ... 100 kHz ... 100 kHz ... 100 kHz
Bandwidth, V AC
15 Hz ... 20 kHz 15 Hz ... 10 kHz 15 Hz ... 10 kHz 15 Hz ... 1 kHz
A AC / Hz TRMS
100  A
1/10/100 mA
1 A / 10 (16) A
10/100 mA
1 A /
10 (16) A
1 A / 10 (16) A
—
A AC+DC TRMS
—
A DC
—
Fuse
10 A/1000 V 10 A/1000 V 10 A/1000 V —
Transformation factor
—  — 
A AC / Hz TRMS
—
mV/A
mA/A
—
mV/A
Ri
= 1 M
A AC+DC TRM S
—
mV/A
mA/A
—
mV/A
Ri = 1 M
A DC
—
mV/A
mA/A
—
mV/A
Ri = 1 M
Hz (A AC)
... 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
1)
 — — —
IR Interface
 — — —
Power pack adapter socket
 — — —
Protection
IP52 / IP65 IP52 IP52 IP52
Measuring category
1000 V CAT I I I
600 V CAT IV
1000 V CAT I I I
600 V CAT IV
1000 V CAT I I I
600 V CAT IV
1000 V CAT I I I
600 V CAT IV
1)
For 15,400 measured values, sampling rate adjustable from 0.1 second to 9 hours
Included
1multimeter
1 pair of safety measurement cables with 4 mm test probes,
1000 V CAT I I I, 600 V CAT IV (KS17-2)
2 batteries, 1.5 V, type AA
1 DAkkS calibration certificate
1 protective rubber cover (METRA HIT AM XTRA / X-
TRA / OUTDOOR
only)
1 condensed operating instructions*, English/German
* Detailed operating instructions are available for download on the Internet
at www.gossenmetrawatt.com
Voluntary Manufacturer’s Guarantee
36 months for materials and workmanship
1 to 3 years for calibration (de
pending upon application)