Instructions
Table Of Contents
- 1 Safety Features and Precautions
- 2 Operating Overview – Connections, Keys, Rotary Switch, Symbols
- 3 Initial Start-Up
- 4 Control Functions
- 5 Measurements
- 5.1 Voltage Measurement
- 5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)
- 5.1.2 Alternating Voltage Measurement with 1 MW Load Resistance and Frequency Measurement with Selectable Low-Pass Filter (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1.3 Alternating Voltage and Frequency Measurement V AC and Hz with Selectable Low-Pass Filter (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1.4 Frequency and Duty Cycle Measurements (METRA HIT Extra only)
- 5.2 Resistance Measurement, W
- 5.3 Continuity Test
- 5.4 Diode Testing with a Constant Current of 1 mA
- 5.5 Temperature Measurement
- 5.6 Capacitance Measurement (METRA HIT Extra and METRA HIT Etech only)
- 5.7 Current Measurement
- 5.7.1 Direct and Pulsating Current Measurement, Direct Connection, A DC and A (DC+AC) (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.7.2 Alternating Current and Frequency Measurement, Direct Connection, A AC and Hz (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.7.3 Direct and Pulsating Current Measurement with Current Clamp Sensors, A DC and A (DC+AC)
- 5.7.4 Alternating Current Measurement with Current Clamp Sensors, A AC and Hz
- 5.7.5 Direct, Pulsating and Current Measurement with Current Clamps Transformer A DC, A (DC+AC), A AC and Hz (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1 Voltage Measurement
- 6 Device and Measuring Parameters
- 7 Interface Operation
- 8 Technical Data
- 9 Maintenance and Calibration
- 10 Accessories
- 11 Index
38 GMC-I Messtechnik GmbH
V/Hz, , Temperature, and A/Hz Measurements
5.5.2 Measurement with Resistance Sensors
(METRAHIT E
XTRA
and METRAHIT E
TECH
only)
➭ Set the rotary switch to “Temp
TC
” or “Temp
RTD
”.
The last selected temperature measurement or sensor, i.e. type K
or Pt100/Pt1000, remains in memory and is accordingly
displayed. Press the FUNC | ENTER key in order to change to the
other measuring function if required. The sensor type, i.e. Pt100
or Pt1000, is detected automatically and displayed.
There are two different ways to compensate for cable resistance:
Automatic Compensation
➭ Press the ZERO | ESC key.
“Short leads” appears at the display.
If you prefer to enter cable resistance directly, you can skip the
following entry prompt.
➭ Short circuit the measuring instrument’s connector cables.
“000.00 ” appears at the display. After pressing the FUNC |
ENTER key, automatic compensation of cable resistance is
activated for all subsequent measurements. The short-circuit
can now be eliminated, and the device is ready for use.
Entering Cable Resistance
➭ Press the ZERO | ESC key once again in the automatic
compensation menu.
➭ Enter the known resistance of the connector cables with the
scroll keys: Select the digit to be changes with the
keys,
and change the respectively selected digit with the
keys.
The default value is 0.43 (Z3409). Values can be selected
within a range of 0 to 50 .
➭
Upon pressing the
FUNC | ENTER
key, the selected value is activated and
the display is returned to the measuring function. Cable resistance re-
mains in memory even after the instrument has been switched off.
COM
V
Tem p
Temp
TC
0023.3
Temp
RTD
Type K
0025.6
Pt1000
TC
RTD
000.00
Short Leads
R L
Enter Cable Resistance
Automatic
RTD
Compensation
Measuring Ranges
RTD Pt100 – 200.0 +850.0C
RTD Pt1000 –150.0 +850.0C
FUNC
ENTER
FUNC
ENTER
ZERO
ESC
ZERO
ESC
FUNC
ENTER
000.50
R L