DIGITAL TRMS SYSTEM MULTIMETER 

METRAHIT ISO 4¾ Place TRMS System Multimeter 

METRAHit ISO 4¾ Place TRMS Multimeter with Insulation Measurement for Service Technicians.
The METRAHIT ISO multimeter is a rugged portable measuring instrument for use in the field.
It is suitable for servicing household appliance, machines (e.g. forklifts) and systems (e.g. photovoltaic). The instrument can be used in the field and is equipped with an internal, mains-independent power supply.

• Insulation resistance measurement with
  interference voltage detection, test voltages:
  50 V, 100 V, 250 V, 500 V, 1000 V
• Multimeter with diverse functions (V, Ω, F, Hz)
• TRMS measurements: TRMS AC / AC+DC for current / voltage up to 10 kHz
• 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 (I_K = 1 mA, U_flow to 5.1 V) and continuity testing
• Display: 4¾ place, 30.000 digits, 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 RS 232 interface

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.

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.

Voltage Measurement with 1 MΩ Input Resistance

In addition to the usual voltage input with a input resistance of 9 MΩ, which is selected via the VAC or VDC switch position, the measuring instrument is also equipped with an additional V1MΩ
TRMS (AC + DC) switch position for electricians with an input resistance of approximately 1 MΩ. Negative influences resulting from capacitive coupling during voltage measurement in power
supply systems are thus avoided.

Diode Testing with Constant Current Ic = 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 Ik = 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, and the currently measured voltage value is displayed.

Please email sales@hotektech.com or call 253-927-6186 if you are interested in a purchase, or
  need additional information.

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