DranTech PMIT User’s Guide
15
Adjusting Cable Resistance
➭
After selecting a resistance thermometer, the measurement
display is accessed by pressing the key.
➭
The menu for cable resistance adjustment is opened by
simultaneously pressing the and
keys.
R
LEAd and tEMP
are displayed.
➭
The decade (i.e. the position of the digit to be changed) is
selected with the
keys, and the respective digit is set
with the
keys.
➭
The menu is exited upon acknowledging the last digit by
pressing the key, whereupon the measuring display
returns. The cable resistance value remains in memory. The
default value is 0.1
Ω
. Entry is limited to a range of 0 to 50
Ω
.
Note!
The selected cable resistance value remains unchanged
after exiting the function, and when the instrument is
switched off.
11
Insulation Resistance Measurement [M
Ω
@...V]
11.1 Preparing for Measurement
Note!
High-resistance measurements
In the event of extremely high resistances the capacitive
influence of the person performing the measurement and/
or the measuring cable may distort the measured value.
Use therefore short or shielded measurement cables.
The measurement cables may not come into contact with
one another during high-resistance insulation
measurements.
➭
Set the rotary selector switch to “M
Ω
@50V”, “100V”,
“250V” or “500V”, depending upon the desired test voltage.
➭
Connect the DUT as shown on the next page.
Note!
Interference voltage
The rotary selector switch may only be set to M
Ω
@...V
for insulation resistance measurement
(not for voltage measurement).
However, if interference voltage is inadvertently applied
with the switch in this position, it is displayed at the
bottom left. Insulation resistances may only be measured
on voltage-free objects.
If an interference voltage of
>
50 V is present, insulation
resistance measurement is disabled. The LCD continues to
display the interference voltage value. If a voltage of greater than
610 V is present, an acoustic signal is generated as well.
m
Ω
S+
S–
V
Ω°
C
RTD
see chapter 14
Measuring Range:
- -
-
-
-
V
-000
250
V
M
Ω
@
50 ... 500V
10
.
29
V
023
250
V
M
Ω
Selected Test Voltage
Displays test voltage
as long as key is depressed
R
ISO
FUNC
MAN
+
FUNC
Continuous
Measurement
Measuring voltage
/Residual voltage
approx. 2% accuracy
Nominal/
test voltage
