Datasheet

ManualsBrandsGOSSEN METRAWATT ManualsTest EquipmentInsulation measuring device, CAT III 600 V

3-349-415-03

12/1.18

GMC-I Messtechnik GmbH

METRAHIT ISO and METRAHIT COIL

TRMS Multimeter with Insulation Measurement

and Interturn Short-circuit Measurement (C

OIL only)

DAkkS Calibration Certificate as Standard Feature

German

Accreditation Body

D-K-15080-01-01

600 V CAT III

1000 V CAT II

Application

The

METRAHIT ISO

and

METRAHIT COIL

multimeters are rugged porta-

ble measuring instruments. They are suitable for servicing house-

hold appliance, machines (e.g. forklifts) and systems (e.g. photo-

voltaic). The instruments can be used in the field and are

equipped with an internal, mains-independent power supply.

METRAHIT COIL allows for interturn short-circuit measurements in

combination with the COIL TEST ADAPTER. By comparing the mea-

surement results, asymmetries

at the windings of 3-phase machi-

nes

can be directly detected, which, in turn, is an indication of

possible short-circuits. In the case of single-phase motors testing

is performed by comparison with a known setpoint value.

Interturn short-circuit measurement in the inductance range with

the standard adapter COIL: 10 μH to 50 mH @ 100 Hz

The standard adapter COIL is universially suitable for a great num-

ber of electric machines of different performance classes. With

regard to DIN standard motors this corresponds to performances

from approximately 15 kVA to 80 MVA. Adapters for motors with

different inductivity are available upon request.

Features

RMS Value with Distorted Waveshape

The utilized measuring method allows for waveshape independent

TRMS measurement of periodic quantities (AC) and pulsating

quantities (AC and DC) for voltage and current at up to 10 kHz.

Activatable Filter for V AC Measurement

A 1 kHz low-pass filter can be activated if required, e.g. for

measurements at cables with parasitic external signals. The input

signal is checked by a voltage comparator for dangerous voltages

as long as the low-pass filter is activated, which are indicated at

the display if present.

Diode Testing with Constant Current I

= 1 mA

This function can be used to test the polarity of diodes, and to

test electrical circuits for short-circuiting and interruptions. The

test voltage source makes it possible to measure LEDs and

reference diodes up to 5.1 V, e.g. also white LEDs.

Fast Acoustic Continuity Test I

= 1 mA

Testing for short-circuiting and interruption 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 Ω.

Insulation Resistance Measurement with Interference Voltage Detection

Depending upon the utilized instrument variant, insulation resistance can

be measured with an adjustable test voltage of 50 to 1000 V.

If the instrument detects interference voltage of greater than

15 V AC or 25 V DC during insulation testing, an error message is

briefly displayed at the LCD panel. The instrument is then

automatically switched to voltage measurement TRMS (AC + DC)

with an input resistance of approximately 1 MΩ and the currently

measured voltage value is displayed.

Analog Scale for Quick Trend Display – Pointer

The analog scale (with additional negative axis range for zero-

frequency quantities) allows for faster recognition of measured

value fluctuation than is possible with a digital display.

•

Insulation resistance measurement up to 3.1 G

with interference volt-

age detection, test voltages: 50 V, 100 V, 250 V, 500 V, 1000 V

•

Interturn short-circuit measurement

with 1000 V (

METRAHIT COIL

only)

• Multimeter with diverse functions (V, Ω, F, Hz)

•

TRMS measurements:

TRMS AC / AC+DC for current/voltage up to 10 kHz

• Activatable low-pass filter, 1 kHz/–3 dB in the V AC range

• Direct current measurement, 100 nA to 10 A

• Current measurement with clip-on current sensors – CLIP

A transformation ratio of 1 mV:1 mA to 1 mV:1 A can be

selected and is taken into consideration at the display.

• Precision temperature indicator, °C or °F,

for Pt100/Pt1000 sensors and type K thermocouples

•

Diode measurement

= 1 mA, U

flow

to 5.1 V) and

continuity testing

• Duty cycle measurement, 5 to 95% (METRAHIT COIL only)

• Display: 3¾ digits, 3100 steps, illumination can be activated

•

Acoustic signals

for: continuity testing, dangerous contact

voltages, exceeded overload limits

• Min-Max value storage

• Data memory and internal clock, power pack adapter socket

• IP 54

Housing

protection, dust and splash protected, protective cover

• Bidirectional infrared interface

for exchanging data with a PC

• Windows software available as accessory for processing and

graphic display of measured values via USB interface

Summary of content (8 pages)

PAGE 1
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) • • • • • • • • • • • • • • • • • Insulation resistance measurement up to 3.
PAGE 2
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Automatic/Manual Measuring Range Selection Measured quantities are selected with the rotary switch. The measuring range can be automatically matched to the measured value, or selected manually. High Resolution Mode Via mem function „Set Resol“, the multimeter (in V DC and Ohmfunction) can be switched to a high-resolution operating mode with 30,000 digits and enhanced accuracy.
PAGE 3
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Technical Data Meas. Function Measuring Range (input) V 300.0 mV 3.000 V 30.00 V 300.0 V 1000 V Resolution at Upper Range Limit Intrinsic Uncertainty under Reference Conditions Input Impedance 30000 30000 10 μV 100 μV 1 mV 10 mV 100 mV ±(... % rdg. + ...
PAGE 4
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Insulation Resistance Measurement 1 Measuring Range 0.3 V ... 1000 V 2) 5 ... 310.0 kΩ 0.280 ... 3.100 MΩ 02.80 ... 31.00 MΩ 028.0 ... 310.0 MΩ 0280 ... 3100 MΩ Influencing Quantities and Influence Error Intrinsic Uncertainty Nominal Voltage under Reference Resolution UISO Conditions ±( % rdg + d) Ri=1MΩ 3 + 30 > 100 digits 50, 100, 250, 500 V 0.
PAGE 5
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Response Time (after manual range selection) Measured Quantity / Measuring Range V A Response Time, Digital Display Jump Function of the Measured Quantity 1.5 s From 0 to 80% of upper range limit value ,V ,A 300 Ω ... 3 MΩ 2s 30 MΩ, MΩ@U ISO Max. 5 s Continuity < 50 ms °C (Pt 100) Max. 3 s 30 nF ... 300 μF Max. 5 s >10 Hz 1.
PAGE 6
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Data Interface Accessories for operation at a PC Type Data transmission Protocol Baud rate Functions Interface Adapter for USB Connection The USB⏐ X-TRA bidirectional interface adapter includes the following functions: • Configure the METRAHIT ISO from a PC. • Transmit live measurement data to the PC. • Read data out of memory from the METRAHIT ISO.
PAGE 7
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Order Information Designation Insulation multimeter See selection list or scope of delivery on page 2 for scope of delivery. Insulation multimeter with interturn shortcircuit measurement, for standard equipment see Selection List or Scope of Delivery on page 2 Power pack: 90 ...
PAGE 8
METRAHIT ISO and METRAHIT COIL TRMS Multimeter with Insulation Measurement and Interturn Short-circuit Measurement (COIL only) Edited in Germany • Subject to change without notice • A pdf version is available on the Internet GMC-I Messtechnik GmbH Südwestpark 15 90449 Nürnberg • Germany Phone +49 911 8602-111 Fax +49 911 8602-777 E-Mail info@gossenmetrawatt.com www.gossenmetrawatt.