Manual
Table Of Contents
- 1 Safety Instructions
- 2 Applications
- 3 Documentation
- 4 Operating Overview
- 5 Initial Startup
- 6 System Settings
- 6.1 Digital Keyboard
- 6.2 Firmware
- 6.3 Language Selection
- 6.4 Time and Date Settings
- 6.5 Digital Display Settings
- 6.6 Set Display of Leading Zeros
- 6.7 Configuring Password Protection
- 6.8 Viewing the Instrument’s Name
- 6.9 Installing a Functions Expansion
- 6.10 Switching the Instrument Off
- 6.11 Default Settings (instrument reset)
- 7 Control Functions
- 8 Measurements
- 8.1 Enabling Parameter Changes
- 8.2 Insulation Resistance Measurement – RISO Function (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE BT only)
- 8.3 Inter-Turn Short Circuit Measurement – COIL Function (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE only)
- 8.4 Absorption Index Measurement – DAR (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE BT only)
- 8.5 Polarization Index Measurement – PI (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE BT only)
- 8.6 Voltage Measurement
- 8.6.1 Alternating Voltage and Frequency Measurement V AC and Hz with Selectable Low-Pass Filter
- 8.6.2 Duty Cycle Measurement – Duty AC (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE BT only)
- 8.6.3 RPM Measurement – RPM AC (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE BT only)
- 8.6.4 Direct and Pulsating Voltage Measurement, V DC and V (AC+DC)
- 8.7 Resistance Measurement “W”
- 8.8 Capacitance Measurement F
- 8.9 Temperature Measurement with Resistance Thermometers – Temp RTD
- 8.10 Temperature Measurement with Thermocouple – Temp TC
- 8.11 Continuity Test
- 8.12 Diode Testing with Constant Current of 1 mA
- 8.13 Milliohm Measurement – Rlo (2-wire measurement) (METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE only)
- 8.14 Milliohm Measurement – mW/4 (4-wire measurement)
- 8.15 Current Measurement
- 8.15.1 Direct and Pulsating Current Measurement, Direct Connection, – A DC and A (AC+DC)
- 8.15.2 Alternating Current and Frequency Measurement, Direct Connection, – AAC and Hz
- 8.15.3 Direct and Pulsating Current Measurement with Current Clamp Sensor – ADC und A (AC+DC)
- 8.15.4 Alternating Current Measurement with Current Clamp Sensor – AAC and Hz
- 8.16 Measuring Sequences – Test Sequences
- 9 Interface Operation and Software
- 10 Characteristic Values
- 11 Maintenance and Calibration
- 12 Accessories
- 13 Returns and Environmentally Sound Disposal
- 14 CE Declaration
- 15 Addresses
Gossen Metrawatt GmbH 45
8.13 Milliohm Measurement – Rlo (2-wire measurement)
(METRAHIT IM XTRA BT and METRAHIT IM E-DRIVE only)
➭ Disconnect supply power from the electrical circuit of the de-
vice to be measured and discharge all high-voltage capaci-
tors.
Attention!
!
The device under test must be voltage-free!
If interference voltage of Uext > 2 V is detected, visual
and acoustic warnings are generated. Measurement is
disabled as well.
Refer to section 8.6.4 regarding testing for the absence
of voltage with the help of the direct voltage measure-
ment.
➭ Set the rotary switch to Rlo.
➭ Select desired test current Ip set with the
scroll keys.
➭ Select desired test current Ip set polarity: /+/–
➭ Connect the device under test as shown.
➭ Activate the measurement by pressing the Start softkey on the
instrument or on the included probe.
➭ If necessary, conduct zero balancing by pressing the Zero key
(see description below).
➭ Press the Stop softkey in order to end the measurement.
Improving Accuracy by means of Zero Balancing – Zero
Cable resistance and contact resistance can be eliminated in all
measuring ranges by means of zero balancing.
➭ Short circuit the measurement cables to this end.
➭ Activate the measurement by pressing the Start softkey.
➭ Insofar as the value for Zero is less than a permissible threshold
of 0 to 50% of the measuring range, the Zero softkey is no lon-
ger grayed out in the display and the Zero function can be acti-
vated by pressing the Zero key.
➭ The value ascertained for Zero is saved and appears above the
measurement display. Automatic compensation of cable resis-
tance is activated for all subsequent measurements. Cable re-
sistance is deleted after the measurement has been ended.
➭ The correction or offset value is deleted by pressing Zero once
again during measurement, or by ending the measurement.
The value is cleared from the display.
Note
The “Setup for present measurement” submenu cannot
be accessed for the milliohm measurement because zero
balancing and the polarity of test current I
P can be
selected directly in the measurement view.
Blown Fuse
In the event of a blown fuse, measurement is not possible and the
following display appears:
F2
S– A
V
Tem p
m/4
COIL
S+
S– A
V
Tem p
m/4
COIL
S+
+ –
R
x
0V!
!
R
x
Rlo
Short circuit the ends
of the measurement cables.
Start
3 /30
Measuring Ranges:
/+/– 20 mA
Test Current:
/+/– 200 mA
Zero
Stop
Uext > 2 V
STOP!