Wolfgang Warmbier GmbH & Co. KG
11
4
General Operation
4.1
Connecting the Instrument
The test leads are connected to the “
+
” and “
COM
” jacks.
When resistance in the G
range is measured, the shielded
cable (included) should be con-
nected to the
COM
and
SHIELD
jacks. Be sure to observe color
coding.
4.2
Switching On,
Monitoring and Switching Off
If supply voltage drops to a value of less than 8.5 V, the
LOW BATT pop-up message appears: No more measurements
can be started.
If battery voltage falls below the allowable limit value of 8.0 V the
instrument cannot be switched on, or it is switched off.
Nor can measurements be started in the resistance measuring
ranges in the event of interference voltage.
The instrument only switches itself off automatically after comple-
tion of an (automatic) measuring sequence, and after the prede-
termined on-time has expired (see page 8). On-time is reset to its
original value as defined in the setup menu, as soon as any key or
the rotary function switch is activated.
If the instrument is switched off automatically with the rotary
switch in any position other than
OFF
, it can be reactivated by
pressing the
ESC
key. The instrument is also reactivated if the
rotary switch is activated and turned through the
OFF
position.
The instrument can be switched off manually by turning the rotary
switch to the
OFF
position.
4.3
Optical Indicators
1
Function testing should be executed at regular intervals (see following
section regarding testing the LEDs).
Testing the LED which Indicates Detection of Interference Voltage
when Switched Off – OFF Switch Position
➭
Apply a voltage of greater than 50 V (+ and COM jacks).
➭
Turn the rotary switch to the V position.
➭
Read the voltage value at the LCD.
➭
Turn the rotary switch to the OFF position.
Test results:
If applied voltage is unchanged and the LED which
indicates the detection of interference voltage lights up red, the
LED is OK. In this case, the LED reliably indicates interference
voltage even when the instrument is switched off. We recom-
mend executing this test at regular intervals.
METRISO 3000 Measuring Functions, Measuring Ranges and Limit
Values
4.4
Measurement Value Display and Memory
The following appear at the
display panel
:
•
Measurement values with abbreviations and units of measure
•
Selected function
•
Error messages
Measurement values for automatic measuring sequences are
stored and displayed as digital values until the next measurement
sequence is started, or until automatic shutdown occurs.
If the upper range limit is exceeded, the upper limit value is dis-
played and is preceded by the “>” symbol (greater than), which
indicates measurement value overrun.
Note
The depiction of LEDs in these operating instructions
may vary from the LEDs on the actual instrument due to
product improvements.
LED
Status
Function – Cause
Limit Value Indication
–
Measured
resistance
does not violate the limit value.
–
Measured
low-resistance
does not violate the limit value.
Limit Value Indication
–
Measured
resistance
is below the selected limit value.
–
Measured low-resistance has exceeded the permissible limit
value.
Interference voltage when switched off
1
and indication of
test voltage during the resistance measurement
Dangerous voltage of greater than 50 V at the measurement
inputs:
–
Initialization of the
resistance
and low-resistance measure-
ments is disabled.
–
During the
resistance measurement
(R
ESD
),
high test voltage is applied to the measurement inputs.
Detection of interference voltage in the on-state
in the resistance measuring ranges after starting measurement
KS-C
(Z541F)
+
COM
SHIELD
Limit
Green
Limit
Red
Red
!
Measuring Ranges
R
ESD
U
M
= 10, 100, 500 V
R
1
... 10 k
U
0 ... 500 V
T
-10,0 ... +70.0
C
H
REL
10.0 ... 90.0%
Adjustable Limit Values
Lower Limit Value
Upper Limit Value
Limit R
LO
> 0.01
M
< 0.01
M
> 0.1
M
< 0.1
M
> 10
M
< 5
M
< 35
M
< 100
M
< 1000
M
< 10000
M
< 100000
M
< 1000000
M
Limit
