User Manual

44 GMC-I Messtechnik GmbH
Measurements: V/Hz/dB – PQ/ – MHz/% – Ω/nS/R
SL
– / – Temp – /m – W/Wh – A/Hz/thd
5.5.2 Measurement with Resistance Sensors
Ð Set the rotary switch to “Temp
TC
” or “Temp
RTD
”.
The last selected temperature measurement or last selected tem-
perature sensor, i.e. type K or Pt100/Pt1000, remains in memory
and is displayed. Press the FUNC | ENTER key in order to change to
the other measuring function. 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
Ð Press the ZERO | ESC key. The “short leads” display appears.
If you prefer to enter cable resistance directly, you can skip the fol-
lowing entry prompt.
Ð Short circuit the measuring instrument’s connector cables.
“00.00” 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
Ð Press the ZERO | ESC key once again in the automatic compen-
sation menu.
Ð Enter the known resistance value of the connector cables with
the scroll keys: Select the digit to be changed with the
v w keys
and change the respectively selected digit with the
 keys.
The default value is 0.43 Ω (Z3409). Values can be selected
within a range of 0 to 50 Ω.
Ð Upon pressing the FUNC | ENTER key, the selected value is acti-
vated and the display is returned to the measuring function.
Cable resistance remains in memory even after the instrument
has been switched off.
COM
V
Tem p
Ω
Temp
TC
Temp
RTD
TC
RTD
00 . 00
Ω
short leads
Enter Cable Resistance
Automatic
RTD
Compensation
Measuring Ranges
RTD Pt100 –200.0 … +850.0 °C
RTD Pt1000 –150.0 … +850.0 °C
FUNC
ENTER
FUNC
ENTER
ZERO
ESC
ZERO
ESC
FUNC
ENTER
00 . 50
Ω
0023 . 3
°C
TC
1 . 22 . 4
0256 . 0
°C
Pt1000
rleadsmeas
rleadsset