Gossen MetraWatt SECULIFE HIT MD User manual

SECULIFEHITAM HITMD
METRAHIT AM BASE, AM PRO, AM TECH, AM XTRA
METRAHIT X-TRA OUTDOOR TECH PRO BASE
Advanced Multimeters / Special Multimeters
Operating Instructions
3-349-352-03
14/5.18
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2GMC-I Messtechnik GmbH
Standard Equipment Contact Persons
Standard Equipment
1multimeter
1 measurement cable set
2 batteries
1 DAkkS calibration certificate
1 abbreviated operating instructions
–
1) For 15,400 measured values, sampling rate adjustable from 0.1 second to 9 hours
Function SECULIFE
HIT AM /HIT MD
METRAHIT
AM XTRA
X- TRA /
OUTDOOR
METRAHIT
AM TECH
TECH
METRAHIT
AM PRO
PRO
METRAHIT
AM BASE
B ASE
M687A/M687B M240A/M240O M243A M242A M241A
V AC / Hz TRMS
(Ri 9 M) 
&Filter

&Filter

&Filter

&Filter

V AC TRMS
(Ri = 1 M) 
&Filter

&Filter

&Filter

&Filter
—
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
15 Hz ... 20 kHz 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
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 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
1kHz
1kHz
1kHz
1kHz
1kHz
1kHz
1kHz
1kHz
A DC
——
mV/A
mA/A —mV/A Ri = 1 M
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 1) ———
IR Interface ———
Power pack
adapter socket ———
Protection
IP65
X-TRA: IP52
OUTDOOR:
IP65
IP52 IP52 IP52
Antimicrobial
properties /—————
Measuring
category
600 V CAT III
300 V CAT IV
1000 V CAT III
600 V CAT IV
1000 V CAT III
600 V CAT IV
1000 V CAT II I
600 V CAT IV
1000 V CAT III
600 V CAT IV
Rubber holster ———
Measurement cable
set
KS17-2AMB/
KS17-2 KS17-2 KS17-2 KS17-2 KS17-2
DAkkS calibr. certifi-
cate

Hygiene Expertise — / ————
Function SECULIFE
HIT AM /HIT MD
METRAHIT
AM XTRA
X- TRA /
OUTDOOR
METRAHIT
AM TECH
TECH
METRAHIT
AM PRO
PRO
METRAHIT
AM BASE
B ASE
M687A/M687B M240A/M240O M243A M242A M241A
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6GMC-I Messtechnik GmbH
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 MWLoad Resistance
and Frequency Measurement with Selectable Low-Pass Filter
(METRAHIT AM X-TRA / AM TECH / AM PRO / X-TRA / OUTDOOR /
TECH / PRO / SECULIFEHITAM/MD only) ............................................28
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 / SECULIFEHIT AM / 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 / X - TRA / O UTDOOR / SECULIFEHIT AM / MD only) .... 37
5.6 Capacitance Measurement ( METRA HIT AM XTRA / X - TRA /
O UTDOOR / SECULIFEHIT AM / MD and METRAHIT AM TECH / 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 /
X-TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only) .................40
5.7.2 Alternating Current and Frequency Measurement, Direct Connection,
A AC and Hz (METRAHIT AM X-TRA / AM TECH / AM PRO /
X-TRA / OUTDOOR / TECH / PRO / SECULIFEHITAM/MD only) .................41
5.7.3 Direct and Pulsating Current Measurement with Clip-On Current Sensor,
A DC and A (DC+AC) ( METRAHIT AM TECH / TECH and
METRAHITAM BASE / BASE
only) ...................................................... 42
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GMC-I Messtechnik GmbH 7
Table of Contents
Contents Page Contents Page
5.7.4
Alternating Current Measurement with Clip-On Current Sensor
A AC and Hz ( METRAHIT AM TECH / T ECH and METRAHITAM BASE /
B ASE only) ............................................................................................43
5.7.5 Direct, Pulsating and Current Measurement with Clip-On Current
Transformer A DC, A (DC+AC), A AC and Hz (METRAHIT AM TECH /
TECH only) ...................................................................................... 44
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 /
SECULIFEHITAM/MD only) ...................................................52
7.1 Activating the Interface ................................................................... 52
7.2 Configuring Interface Parameters .................................................... 53
8 Technical Data ................................................................ 54
9 Maintenance and Calibration ............................................62
9.1 Displays – Error Messages ............................................................ 62
9.2 Batteries ....................................................................................... 62
9.3
Fuse ( METRAHIT AM XTRA / X-TRA / OUTDOOR , METRAHIT AM TECH /
TECH , METRAHIT AM PRO / PRO and SECULIFEHITAM/MD only) .........63
9.4 Housing Maintenance .................................................................... 64
9.5 Return and Environmentally Sound Disposal .................................... 64
9.6 Recalibration ................................................................................. 65
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
10.4
Interface Accessories for METRAHIT AM XTRA / X-TRA / OUTDOOR ,
SECULIFEHITAM and SECULIFEHITMD (not included) ......................... 67
11 Index .................................................................................68
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8GMC-I Messtechnik GmbH
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 guide-
lines and national regulations. We confirm this with the CE mark-
ing. 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 61010–1:2011/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
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, for
example 1000 V CAT III.
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 ca-
pable 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 meas-
urements which involve contact hazards. Be certain that a sec-
ond 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 HITAM/HITMD: 600 V CAT III and 300 V CAT IV.
CAT Definition
I
Measurements in electrical circuits
which are not directly connected to the mains:
for example electrical systems in motor vehicles and aircraft, batteries etc.
II
Measurements in electrical circuits
which are electrically connected to the low-voltage mains:
with plugs, e.g. at home, in the office or laboratory etc.
III
Measurements in building installations:
stationary power consumers, distributor terminals, devices connected
permanently to the distributor
IV Measurements at power sources for low-voltage installations:
meters, mains terminals, primary overvoltage protection devices
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GMC-I Messtechnik GmbH 9
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 pres-
ent.
• 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 “Over-
load 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: METRAHITAM BASE / BASE).
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.
Opening of Equipment / Repair
The equipment may be opened only by authorized service per-
sonnel 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 ser-
vice 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 measur-
ing 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 Con-
ditions” on page 60)
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10 GMC-I Messtechnik GmbH
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 temper-
ature 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)
!
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12 GMC-I Messtechnik GmbH
Operating Overview – Connections, Keys, Rotary Switch, Symbols
2 Operating Overview – Connections, Keys, Rotary Switch, Symbols 1 Display (LCD) (see page 13 for significance of symbols)
2MAN / AUTO shift key for manual/automatic measuring range selection
Increase parameter values
Operating mode menu:
Select individual menu entries against direction of flow
3 ON / OFF | LIGHT key for switching device and display illumination on and off
4FUNC | 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
and
capacitance measurement ( METRAHIT AM XTRA / X- TRA / O UTDOOR ,
METRAHIT AM TECH / TECH and SECULIFEHIT AM / MD only) with automatic
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
level, exit parameters configuration without
saving data
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
*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 !
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GMC-I Messtechnik GmbH 13
Operating Overview – Connections, Keys, Rotary Switch, Symbols
Symbols Used in the Digital Display 1 Battery level indicator
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-TRA /
OUTDOOR and SECULIFEHITAM/MD only
8 ISO: no function here
9 Transformation factor (current clip factor), with METRAHIT AM BASE /
BASE and METRAHIT AM TECH / TECH only
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 /
X-TRA / OUTDOOR and SECULIFEHITAM/MD only
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
12910
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
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14 GMC-I Messtechnik GmbH
Operating Overview – Connections, Keys, Rotary Switch, Symbols
Symbols of Rotary Switch Positions
Switch FUNC Display Measuring Function METRAHIT
AM XTRA
X- TRA
OUTDOOR
SECULIFEHIT
AM / MD
METRAHIT
AM TECH
T ECH
METRAHIT
AM PRO
P RO
METRA HIT
AM BASE
B ASE
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0/4 V~ AC TRMS Alternating voltage, TRMS AC, full bandwidth, input 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3 Hz ~ AC Voltage frequency, full bandwidth, input 1 M—
V 0/2 V DC Direct voltage 
V1 V DC AC TRMS Pulsating voltage, TRMS ( ) 
MHz 0/2 MHz (High) frequency @ 5 V~ ———
%1 % Duty cycle @ 5 V~ ———
—(Direct current) resistance 
0/2 Continuity testing with acoustic signal 
1V DC Diode voltage 
Temp TC 0/2 C Typ-K Temperature thermocouple Type K 
Temp RTD 1C Pt100/1000 Temperature with resistance thermometer Pt100/Pt1000 ———
— nF Capacitance ——
A0/2 A DC Direct current value —
A1 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 —
0/2 A DC
Direct current value with AC DC clip-on current sensor 1 V:1/10/100/1000 A ——
1 A DC AC TRMS
Pulsating current value, TRMS, with AC DC clip-on current sensor, see above ——
0/2 A~ AC TRMS
Alternating current strength, TRMS, with clip-on current sensor, see above ——
Hz ( ) 1 Hz ~ AC Current frequency — —
1kHz
1kHz
1kHz
1kHz
VACDC VAC
2VDC 2
+=
A
A
A
A
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GMC-I Messtechnik GmbH 15
Operating Overview – Connections, Keys, Rotary Switch, Symbols
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 III or IV device, see also
“Measuring Categories and their Significance per IEC
61010-1” on page 8
Continuous, doubled or reinforced insulation
Indicates EC conformity
Position of the infrared interface, window on the top of
the instrument (METRAHIT AM XTRA / X-TRA / OUTDOOR and
SECULIFEHITAM/MD only)
Position of the power pack connector socket,
see also chapter 3.1
(METRAHIT AM XTRA / X-TRA / OUTDOOR and
SECULIFEHITAM/MD only)
Fuse for current measuring ranges, see chapter 9.3
(not METRAHIT AM BASE / BASE)
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.
!
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
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16 GMC-I Messtechnik GmbH
Initial Start-Up – Setup
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).
Attention!
!
Disconnect the instrument from the measuring circuit be-
fore opening the battery compartment lid in order to re-
place the batteries.
Operation with the Power Pack
(accessory for METRAHIT AM XTRA / X-TRA / OUTDOOR and
SECULIFEHITAM/MD, not included, see chapter 10.3)
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.
Display Illumination
After the instrument has been switched on, background illumina-
tion can be activated by briefly pressing the ON / OFF | LIGHT key. Il-
lumination 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- TRA / O UTDOOR
and SECULIFEHIT
AM / MD only)
The multimeter is switched on after transmission of a data block
from the PC, assuming the “irStb ” has been set to “iron ” (see
chapter 6.4). However, we recommend using the power saving
mode: “iroff ”.
Note
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 “tiME ” 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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GMC-I Messtechnik GmbH 17
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 min-
ute, or 1C or 1 F per minute), and if none of the keys or the ro-
tary 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).
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)
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18 GMC-I Messtechnik GmbH
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 inadvert-
ently 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 or
scroll key.
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
* Via manual measuring range selection only
Function Display
MAN / AUTO
Manual mode active:
utilized measuring range is fixed MAN
or 
Range switching sequence for:
V: 100 mV*
 1 V  10 V  100 V  1000 V
Hz: 100 Hz
 1 kHz  10 kHz  100 kHz
: 100 
 1 k  10 k  100 k  1 M 
10 M  40 M
A: METRAHIT AM XTRA / X-TRA / OUTDOOR and
SECULIFEHITAM/MD:
100  A  1 mA  10 mA  100 mA  1  A  10 A (16 A)
METRAHIT AM TECH / TECH:
10 mA
 100 mA  1A  10 A (16 A)
METRAHIT AM PRO / PRO: 1A
 10 A (16 A)
A:METRAHITAM BASE / BASE and METRAHIT AM TECH /
TECH: see chapter 5.7.3 ff
F: METRAHIT AM XTRA / X-TRA / OUTDOOR,
SECULIFEHITAM/MD and METRAHIT AM TECH / TECH:
10 nF  100 nF  1  F  10  F  100  F  1000  F
MAN
MAN / AUTO Return to automatic measuring range selection —
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GMC-I Messtechnik GmbH 19
Control Functions
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
•WiththeDATA 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:
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.
Note
As a result of TRMS measurement, the multimeter displays a
residual value of 1 to 30 digits with short-circuited measure-
ment cables as the zero point for V AC / I AC or V(AC+DC) /
I (AC+DC) measurements (non-linearity of the TRMS con-
verter). 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).
Deviation from zero
– With short-circuited measurement cables for V, , A
– With open input for capacitance unit of measure F
Display
0 to 200 digits ZERO REL
> 200 to 5000 digits REL
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20 GMC-I Messtechnik GmbH
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.
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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GMC-I Messtechnik GmbH 21
Control Functions
4.4 Measured Value Storage: DATA (auto-hold / compare)
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.
Note
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.
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
DATA
Function
Press
DATA /
Min/Max
Condition Response from Instrument
Measuring
Function
Measuring
Signal
Display
Acoustic
MV
Digital DATA
Activate Brief blinks Once
Save
(stabilized
measured
value)
V, A, F, Hz,
MHz, %
> 10%
of R Is dis-
played Static Once Twice 2)
 0L
Reactivate 1)
V, A, F, Hz,
MHz, %
< 10%
of R Stored
MV Blinks
 = 0L
Change to
Min/Max Brief See table in chapter 4.4.1
Exit Long
Is cleared Is cleared Twice
V, A, Hz
t [s]
100%
10%
Activated Reactivated
Save Save
10,000 digits
of measuring range
F, MHz, %
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22 GMC-I Messtechnik GmbH
Control Functions
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.
Note
As opposed to the DATA function, the Min/Max function can
also be used for temperature measurement.
Min/Max
Function
Press
DATA /
Min/Max
Min. and Max.
Measured Values
Response from Instrument
Display Acoustic
Signal
Measured Value
Digital
Max.
Min.
1
Activate
and save
2 x brief are saved
Momentary
measured
value
Max
and
min.
2 x
2
Save and
display
Brief Storage continues in
background,
new min. and max.
values are displayed.
Saved min.
value Min. 1 x
Brief Saved max.
value Max. 1 x
3
Return to 1
Brief
Same as 1,
stored values are not
deleted
Same as 1 Same
as 1 1 x
Stop Long Are deleted
Momentary
measured
value
Is
deleted
2 x
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GMC-I Messtechnik GmbH 23
Control Functions
4.5 Measurement Data Recording (METRAHIT AM XTRA / X-TRA /
OUTDOOR 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 re-
tained even after the multimeter is switched off. The system ac-
quires 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)
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 oper-
ation.
➭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.
Parameter Page: header
CLEAr 24: Clear Memory
EMpty 24: Clear Memory – appears after CLEAr
0CCvP 24: Querying Memory Occupancy
rAtE 48: rAtE – set the sampling rate (
AM XTRA / X- TRA / O UTDOOR / HIT AM / MD
only)
StArt 23: Starting Recording via Menu Functions
StoP 24: Ending Recording
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
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24 GMC-I Messtechnik GmbH
Control Functions
During Recording
STORE is displayed underneath the analog display during memory
mode operation, and
memory occupancy can be controlled:
StoP 000.3%
The following message appears as soon as memory is full: “ 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.
1nFo ... StorE 017.4% StArt
Clear Memory
This function deletes all measured values from memory!
This function cannot be executed during memory mode
operation.
1nFo ... StorE 017. 4% wStArt
CLEAr empty
FUNC
ENTER
MEASURE
SETUP
FUNC
ENTER
MEASURE
SETUP
FUNC
ENTER
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
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