Short-form Operating Instructions
5/12.21
METRAHIT ISO AERO
TRMS Multimeter with Insulation Measurement
Metrahit ISO Aero TRMS Multimeter
Please make sure to read the detailed operating instructions at www.gossenmetrawatt.com.
The short-form instructions are no substitute for the detailed instructions!
Symbol 
indicates parameter settings which are only described in the detailed operating instructions.
Standard Equipment
- 1 Isolation multimeter
- 1 Protective rubber cover
- 1 Cable set KS17-2
- 1 DAkkS calibration certificate
- 2 Batteries 1.5 V, type AA inserted in unit
- 1 Power pack NA X-TRA
- 1 Short-form operating instructions*
- * Detailed operating instructions for download on the Internet at www.gossenmetrawatt.com
Application of measuring cable set KS17-2
| Maximum Rated Voltage | 600 V | 1000V |
| Measuring Category | CAT III | CAT I I |
| Maximum Rated Current | 1 A | 16 A |
| with safety cap applied | • | — |
| without safety cap applied | — | • |
Safety Instructions
In order to maintain the flawless condition of the instrument, and to ensure its safe operation, 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.
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 able to recognize contact hazards and take the appropriate safety precautions. Contact hazards exist wherever voltages of more than 33 V (RMS value) and/or 70 V DC occur.
The maximum voltage allowable according to standard between the voltage inputs or all inputs towards earth respectively is equal to 1000 V, category II / 600 V, category III.
Attention: Unexpected voltages may occur at defective devices, capacitors,…!
The insulation of the measurement cables may not be damaged, cables and plugs may not be interrupted!
No measurements may be made in electrical circuits with corona discharge (high-voltage)!
Special care is required when measurements are made in HF electrical circuits where dangerous pulsating voltages may be present.
Measurements under moist ambient conditions are not permissible.
Do not overload the measuring ranges beyond their allowable capacities!
The input of the current measuring ranges is fitted with a fuse.
Use original fuses only, see label on the housing or technical data section!
Only operate the instrument with batteries inserted. Otherwise dangerous currents or voltages will not be indicated and your instrument may be damaged.
The device may not be operated with the fuse or battery compartment cover removed.
Switching on / off / Light on
Battery Test
Battery Replacement
2 Batteries: IEC LR6 / AA – AM3 – Mignon
Disconnect the instrument from the measuring circuit before opening the battery compartment lid! Turn the slotted head screw counter-clockwise for this purpose. Observe the correct polarity of the batteries!
When refitting the battery compartment lid the side with the guide hooks must be inserted first. Then turn the slotted head srew clockwise.
Select Resolution 
Select Measuring Function 
Measuring Range Selection
Measuring Inputs 
DATA-Hold/-Compare 
MIN/MAX memory 
ZERO
Zero Balancing
Ω Resistance Measurement
Continuity Testing 
Diode Testing
Temp RTD
Temp TC
Temperature Measurement 
V
/ V 
Direct Voltage / Pulsating Voltage Measurement
V~/ Hz
AC Voltage – Frequency, without/with Low-pass Filter
A / A
DC / Pulsating Current Measurement
A~ / Hz
Alternating Current / Frequency Measurement
V / Hz
Measurement with Clip-on Current Sensor
| Transformation ratio CLIP |
Measuring Ranges | Current sensor | ||
| 300 mV |
3 V | 30 V | ||
| 1:1 1mV/1mA |
0,3 A | 3 A | 30 A | WZ12C |
| 1:10 1mV/10mA |
3 A | 30 A | 300 A | WZ12B Z201A/B VETRAFLEX |
| 1:100 1mV/100mA |
30 A | 300 A | 3000 A | Z202A/B VETRAFLEX |
| 1:1000 1 mV/1 A |
300 A |
3000 A | (30kA) | WZ12C Z202A/B Z203A/B VETRAFLEX |
| Transformation ratio CLIP |
Measuring Ranges | Zange Current transformer | ||
| 30 mA |
300 mA |
3 A | ||
| 1:1 1mA/1mA |
30 mA |
300 mA |
3 A | |
| 1:10 1mA/10mA |
300 mA |
3 A | 30 A | |
| 1:100 1mA/1 00mA |
3A | 30A | 300A | |
| 1:1000 1 mA/1 A |
30 A | 300 A | 3000 A | WZ12A WZ12D WZ11A 73511 73512 73514 |
Capacitance
V 1MΩ (Ri = 1 MΩ)
Interference Voltage
MΩ@UISO 
Device and Measuring Parameters
SETUP 
Main Menus →… SEnd … StorE … 
Sub-menus / Parameters ↓
Technical Data
| Measuring Range | Measuring Uncertainty | Overload capacity | ||
|
 |
|||
| 300 mV | ±(0,2% + 3 D) 2) |
±1/1,5% + 3 D (> 100 D) | 1000 V DC AC sine |
continuous |
| 3 V | ±(0,15% + 2 D) | ±1/1,5% + 3 D (> 100 D) | ||
| 30 V | ±(0,15% + 2 D) | |||
| 300 V | ±(0,15% + 2 D) | |||
| 1000 V | ±(0,2% + 2 D) | |||
| 1 Hz … 300,0 kHz | — | ±(0,1% + 2 D) | 1000 V 3) | max. 10 s |
|
|
|||
| 300 μA | ±(0,5% + 5 D) | ±1,5% + 5 D (> 100 D) | 0,3 A | continuous |
| 3 mA | ±(0,2% + 3 D) | |||
| 30 mA | ±(0,5% + 3 D) | |||
| 300 mA | ±(0,2% + 3 D) | |||
| 3 A | ±(1% + 5 D) | 10 A | 5 min | |
| 10 A | ±(1% + 5 D) | |||
| 1 Hz … 30,00 kHz | — | ±(0,1% + 2 D) | 4) | |
| ±(… % v. MW/rdg. + … D) | ||||
| 300 Ω | 0,5 + 3 2) | 1000 V DC AC sine |
max. 10 s | |
| 3 kΩ | 0,5 + 2 | |||
| 30 kΩ | ||||
| 300 kΩ | ||||
| 3 MΩ | ||||
| 30 MΩ | 2 + 5 | |||
| 300 Ω |
3 + 5 | |||
| 5,100 V |
2 + 5 | |||
| ±(… % v. MW/rdg. + … D) | ||||
| 30 nF | ±(1% + 6 D) 2) | 1000 V DC AC sine |
max. 10 s | |
| 300 nF | ±(1% + 6 D) | |||
| 3 μF | ||||
| 30 μF | ||||
| 300 μF | ±(5% + 6 D) | |||
- bei / at 0 ºC … + 40 ºC
- bei / with function ZERO active
- Power limiting: 3 · 10⁶ V · Hz @ U > 100 V
- max. current values see current measuring range
Insulation Measurement 1)
| Measuring Range | nominal voltage UISO [V] | Measuring Uncertainty ±(… % v. MW/rdg. + … D) |
| 0,3 V … 1000 V 2) |
Ri=1MΩ | 3 + 30 > 100 Digit |
| 5 … 310,0 kΩ | 10//50/100/250/500 V | 5 + 30 // 3 + 5 |
| 0,280 … 3,100 MΩ | 10//50/100/250/500 V | 5 + 30 // 3 + 5 |
| 02,80 … 31,00 MΩ | 10//50/100/250/500 V | 5 + 30 // 5 + 5 |
| 028,0 … 310,0 MΩ | 10//50/100/250/500 V | 5 + 30 // 5 + 5 |
| 0280 … 3100 MΩ | 500 | 5 + 5 |
- During insulation resistance measurement (MΩ@UISO): If „Error“ is displayed >> limits: Uinterference > 10 … 20 V and Uinterference ≠ Uiso,
Ri < 10 kΩ@ Uiso 10 V, Ri < 50 kΩ@ Uiso 50 V,
Ri < 100 kΩ @ Uiso 100 V, Ri < 250 kΩ@ Uiso 250 V,
Ri < 500 kΩ@ Uiso 500 V - Interference voltage measurement TRMS (V AC + DC) with 1 MΩ input resistance, Bandwidth 15 Hz … 500 Hz, measuring error 3% + 30 Digit
Electrical Safety
Protection class II
– nach / per IEC 61010-1:2010/DIN EN 61010-1:2011/VDE 0411-1:2011
Measuring Category CAT II / CAT III
Nominal Voltage 1000 V / 600 V
Pollution degree 2
Test Voltage (nach/per IEC 61010-1) 5,2 kV~
Protection Housing: IP54 (pressure equalization by means of the housing)
Electromagnetic Compatibility EMC
Interference Emission
EN 61326-1:2013 class B
Interference Immunity
EN 61326-1:2013, EN 61326-2-1:2013
Ambient Conditions
Accuracy range 0°C … + 40°C
Operating temperature –10 °C … + 50°C
Storage temperature without battery – 25 °C … + 70°C
relative humidity 40 … 75 %
no condensation allowed
Elevation up to 2000 m maximum
Fuse
FF(ultrarapid) 10 A / 1000 V AC DC
10 mm x 38 mm
breaking capacity: 30 kA (Min 10 kA)
If you use other fuses than the one indicated above you forfeit your product guarantee.
Internal Fuse Test
Fuse Replacement
Disconnect the instrument from the measuring circuit before opening the fuse compartment lid! Turn the (captive) slotted head screw counter-clockwise for this purpose. Remove the fuse with the flat end of the fuse compartment lid.
When refitting the fuse compartment lid the side with the guide hooks must be inserted first. Then turn the slotted head srew clockwise.
Repair and Replacement Parts Service
Calibration Lab and Rental Instrument Service
When you need service, please contact:
GMC-I Service GmbH
Service-Center
Beuthener Straße 41
90471 Nürnberg • Germany
Phone +49 911 817718-0
Fax +49 911 817718-253
E-Mail service@gossenmetrawatt.com
www.gmci-service.com
Product Support
When you need support, please contact:
Gossen Metrawatt GmbH
Product Support Hotline
Telefon D 0900 1 8602-00
A/CH +49 911 8602-0
Phone +49 911 8602-0
Fax +49 911 8602-709
E-Mail support@gossenmetrawatt.com
© Gossen Metrawatt GmbH
Edited in Germany • Subject to change without notice / errors excepted • A pdf version is available on the Internet
All trademarks, registered trademarks, logos, product names, and company names are the property of their respective owners.
Gossen Metrawatt GmbH
Südwestpark 15
90449 Nürnberg • Germany
Telefon +49 911 8602-0
Fax +49 911 8602-669
E-Mail info@gossenmetrawatt.com
www.gossenmetrawatt.com
Documents / Resources
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GOSSEN METRAWATT Metrahit ISO Aero TRMS Multimeter [pdf] Instruction Manual Metrahit ISO Aero TRMS Multimeter, Metrahit ISO Aero, TRMS Multimeter, Multimeter |