Ziegler RM Series User manual

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© Ziegler Instruments Order No. -E1.R0-921023-2014-ENRM 12 ... 16 User Manual
RM12 ... 16
Analogue Digital Multimeter (User Manual)
Analogue Meters With Moving - Iron Movement

ON
(1)
(2)
(3)
(4)
(5)
(6)
V
DC AC
20 16.
V
W
1000 V 300 mA 10 A
fused
1000 V max
(7)
10
020 30
ON
OFF
!
TRMS
MAN MAX
DATA
MIN MAX/
AUTO
MAN
FmA
0
CA
F
---
W
Hz
V
---
V~
V
---
mA
---
0
C
---
A
(8) (9) (10) (11)
(12)
(16) (15) (14) (13)
(18)
(17)
(19)
VA
MIN MAX
DC AC
ON
-...8 8 8 8
10
020 30
MAN DATA
KW MW
kHz %
0CmF
nF
mm
+
+
5
(1) Liquid crystal display
(2) ON OFF pushbutton/
(3) Pushbutton for data hold
and MIN MAX storage functions/
(4) Pushbutton for manual range
selection
(5) Multi function pushbutton
(6) Function selector switch.
(7) Terminal sockets with automatic
blocking system.
(8) Symbol for CONTINUOUSLY ON’’ "
(9) Display for digits decimal point and,
polarity.
(10) Display for manual range selection,
DATA hold and MIN/MAX storage.
(11) Display for the selected function
(12) Display for the unit of
measured quantity.
(13) Over range indication for
positive analog range.
(14) Pointer for analog indication.
(15) Scale for analog indication
(16) Over range indication for
negative analog range.
(17) Low battery indication.
(18) Buzzer indication
(19) Display
0
C for temperature
measurement range.
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1. Introduction:
Thank you very much for selecting this Multimeter.
This handheld multimeters are suitable for use in the fields of
general electronics and electrical engineering.
These multimeters are manufactured as per DIN43751
2. Safety features and safety precautions
You have chosen a multimeter which provides you a very high degree of
safety The analog digital multimeters RM. - 12 ...16 are
manufactured and tested in compliance with the safety standard DIN
VDE and IEC DIN EN VDE In case of0411 /1010-1 /61010-1 .0411-1
incorrect use or careless handling the safety of both user and multimeter,
is not assured
For proper use and safe handling it is absolutely necessary to read and,
understand the operating instructions before using the meter.
For your safety and for protection of the multimeter the RM,
12...16 multimeters are fitted with an Automatic terminal Blocking
System (ABS).It is coupled with the function selector switch which
blocks the terminal sockets not necessary for measurement.
Please note the following safety precautions:
The multimeter must be operated only by persons who understand
the danger of shock hazards and are aware of the necessary safety
precautions Shock hazards exist wherever voltages of more than.
30V (TRMS) are present.
Do not work alone in shock hazardous environment while carrying
out measurement.
The maximum permissible voltage between any of the terminal
sockets and ground is V But voltages of more than V(7) 1000 . 500
must be applied only to the unblocked sockets on the voltage
measuring ranges (function selector switch set to a V position )(6) ’’ ’’
Take into account that unexpected voltages can occur on device
under test (e g defective instrument)For example capacitors may.. ,
be charged to a dangerously high voltage.
Verify that the test leads are in good condition e g no cracked,..
insulation no open circuits in the leads or connectors,.
This multimeter must not be used for measurements on circuits with
corona discharge (high voltage).
Be particularly careful when measuring on HF circuits Dangerous.
composite voltages may exist there.
Measurements under moist environmental conditions are not
permitted.
All current measuring ranges with the exception of the A range of,16
13, are protected with fuse. The maximum permissibleRM
voltage of the measuring circuit (=nominal voltage of the fuse)is
500V ~on the mA ranges" " , 600V ~on the "A" ranges.
You must use the multimeter only in power systems when the"" ,
current circuit is protected by a fuse or a circuit breaker of A and20 ,
when the nominal voltage of the system does not exceed V500 .
For safe voltage measurements in power systems upto V we1000 ,
recommend the KS measuring adapter which is available as an30 ,
accessory Its internal resistance limits the measuring current in the.
case of overvoltage in correct operation and safely suppresses,
sparking from spark gap Also refer to Section Voltage. 8.1"
measurement on electrical systems up to V with KS1000 30
measuring adapter.
Repair replacement of parts,:
When opening the meter live parts may be exposed Therefore the,.,
meter must be disconnected from the measuring circuit prior to opening
its case for repair or replacement of parts If repair cannot be avoided.
unless the meter is opened and live this work must only be performed,
by a qualified person who understands the danger involved.
Faults and abnormal stress:
When it is realised that the safe operation is no longer possible take the,
meter out of service and secure it against accidental use.
Safe operation may not be possible,
when the meter shows obvious signs of damage,
when the meter no longer functions correctly,
after prolonged storage under adverse conditions,
due to severe stress during transportation.
3. Switching the multimeter ON""
Battery
We have already fitted your meter with a V flat cell battery according to9
IEC F or IEC LR It is ready for operation6 22 6 .61 .
Before you use the
meter for the first time or after storage refer to Section Maintenance, 18.1" -
Battery."
Switching the meter ON""
Press the ON OFF pushbutton" / " .(2)
Switch ON is acknowledged by a sound signal As long as you"- " .
keep the pushbutton pressed all segments of the liquid crystal display,
(LCD) will appear The LCD is shown on page..1
After the pushbutton is released the meter is ready for operation,.
Note:
Electric discharges and high frequency influence may cause incorrect-
information to be displayed and block the measuring process Reset the.
meter by switching it OFF and ON again otherwise check the battery,
connections.
Meaning of the symbols on the device
Warning of a danger point
(Attention refer to the user,
manual)
Earth (ground) terminal.
Double or reinforced insulation

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Disconnect the meter from the measuring circuit before you open it and,
see section Maintenance.18" !"
Automatic TURN OFF-
The meter turns off automatically when the measured value remains,
constant var) iations of the measured v alue > 2 + ( 10digits for about
minutes and when neither a pushbutton nor the function selector switch
is operated during that time It remains ON however when a current.,,
measuring range is selected and a measured value digits is displayed30< .
How to prevent automatic TURN OFF-
In order to prevent automatic TURN OFF select CONTINUOUSLY"""
ON mode For this press y" . , ellow multi function pushbutton and the- (5)
" / " (2) . " "ON OFF pushbutton together The function CONTINUOUSLY ON
is shown on the LCD by the symbol(1) .(8)
Turning the multimeter OFF
Press the ON OFF pushbutton" / " .(2)
4. Function and range selection
The function selector switch is coupled with the Automatic terminal(6)
Blocking System ABS which allows access only to two correct sockets)(
for each function Prior to switching to the mA or A functions or from.""""
the mA or A functions remove the test lead from the corresponding"""" ,
socket When the test leads are plugged in the terminal blocking systems.-,
prevents accidental switching to nonpermissible functions.
4.1 Switching the DC current measuring ranges ON " "
3 mA for RM12
3 mA and 3 A for RM 13
300 mA mA and A for RM30 , 3 14...16
The current measuring ranges mentioned above are not automatically
selected when the meter in switched ON When you need these.
measuring ranges for your measurements you must additionally activate,
them.
set the function selector switch to(6) " "(yellow symbol)
Briefly press the yellow multi function pushbutton- .(5)
The multimeter acknowledges the start of an offset calibration for
these DC current measuring ranges with a sound signal The digital.
display of the multimeter shows CAL during the calibration(9) " "
procedure.
Wait for CAL to disappear from the display"" .
Thereafter the above current measuring ranges are switched ON,"."
They remain switched ON until the multimeter turns OFF-
automatically or is switched OFF manually.
Note:
Automatic turn OFF is inactive on all current measuring ranges when-
the measured value display exceeds digits30 .
Set the function selector switch to the desired position(6) .
4.2 A utoranging
The multimeters feature autoranging for all measuring ranges with the
exception of the mV30 300 ,mV and A10 ~ranges Autoranging.
is automatically selected after switching the multimeter ON According.
to the measured quantity applied the multimeter automatically selects,
the measuring range which gives the best resolution When switching to.
frequency measurement and to ratio measurement the previously,
selected voltage measuring range is maintained.
ON
The meter switches automatically to:
the next higher range at + 3099 1 +( digits digit)
the next lower range at + 240/280 1 -( digits digit)
from the 300mA to the 3mA range at +24 1-( digits digit)
provided the m300 A mA and A ranges are not selected according30 , 3
to section4.1
4.3 Manual range section
You can switch OFF autoranging and select the ranges manually
according to the table on the following page.
Manual mode is switched OFF when pushbutton AUTO MAN is pressed/
(4) 1 , (6) ,for approximately s when the function selector switch is operated
or when the meter is turned OFF and ON again.
When switching back to autoranging from mV30 or mV300 ranges,
3 V range is automatically selected.
1) When these measuring ranges are selected
2) except for RM 12/13
3) except for RM 14...16
5. Liquid crystal display
5.1Digital display
The digital display shows the measured value with correct location of decimal(9)
point and sign The selected measuring Unit and the function. (12) (11)
are simultaneously displayed When measuring DC quantities a minus sign.,
appears in front of the digits when the positive pole of the measured,
quantity is applied to the" "input terminal When upper range limit. 3099
(on the r ange 1999: , " " .) is exceeded then OL is displayed
With V A, and W measurements, the digital display is updated two times
per second.
5.2 Analog indication
The analog indication with pointer presentation gives the dynamic
response of a moving coil movement and is updated times per second-20,
when measuring V A and W, .Analog indication is of particular advantage
when observing variations of measured values and for calibration
procedures.
The analog indicator has its own polarity indication When measuring.
DC quantities the analog scale has a negative range of scale, (15) 5

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divisions so that variations of the measured values around zero can be""
observed exactly When the measured value exceeds the range of.
indication the left triangle is shown before the polarity of the analog, (16)
indicator switches over after approximately s The over range indication0.7 .
on the measuring range ( digits on the range3099< ,
1999<) is shown
by the right triangle.(13)
6. ’’ ’’DATA hold facility
The DATA function allows to automatically hold the measured values.
This is particularly useful for instance when connecting the probes to,,
the measuring point requires full attention When the measured value is.
applied and the condition according to the table shown below is met’’ ’’ ,
the meter holds the measured value on the digital display and emits a
sound signal The probes can now be removed from the measuring point.
and the measured value on the digital display can be read When the(9) .
measured value falls below the limit specified in the table the meter is,
reactivated for a new storage.
The analog indication is not influenced by the DATA hold ,The actual
measured value can still be noted read Note that with a held digital/.
display the location of the decimal point is also held With autoranging,.
selected the measuring range of the analog indicator is no longer known,.
1) Reactivated by falling below the specified limits of the measured value.
2) With the exception of the ranges mV and mV30 300 .
3) 240/280 digits when the ranges 3 mA for RM 12/13 and 300 m A30 ,
mA A for RM3 , 14...16 are selected according to section4.1.
As long as the DATA hold function is active manual range selection is,
not possible The DATA hold function is switched OFF when.,,
The DATA pushb" ” utton (3) is pressed for approx s This is1 . .
acknowledged by sound signals2.
The function selector switch is operated or(6)
The multimeter is turned OFF and ON again.
7. Minimum value and Maximum value MIN MAX storage facility’’ / " .
With the MIN MAX function you can hold the minimum and the maximum/,
measured value which was applied to the input of the multimeter after
activating MIN MAX function The most important application is the/.
determination of the minimum and the maximum value for long term-
monitoring of measured quantities MIN MAX does not influence the./
analog indication The actual measured value can still be noted read/.
Apply the measured quantity to the meter and select the measuring
range prior to activating the MIN MAX function/.
With the function activated you can select the measuring ranges only,
manually if you switch to another range the stored MIN MAX values are,,/
cleared.
Function
DATA
Activate
Store
Reactive
1)
Reset
Short
Long
DATA
MIN MAX/
(3)
Condition
Measuring
Ranges
280<
24<
3)
>OL
280<
280 >
24 >
3)
OL
280 >
dis-
played
stored
mea-
sured
value
Cleared
flashes
dis-
played
flashes
Cleared
1 x
1 x
2 x
Meteracknowledgement
Display
DATA
Sound
Signal
Meas.
Value
digital
Limit of
Measured
Values
(digits)
V
2)
A
W
F Hz,%,
V
2)
A
W
F Hz,%,
The MIN MAX function is switched OFF when the MIN MAX pushbutton/,/
(3) 1 ,is pressed for approximately s or when the function selector switch
(6) , .is operated or when the meter is turned OFF and ON again
Notes:
The mV30 and mV300 measuring ranges can only be selected
manually with the AUTO MAN pushbutton’’ / ’’ ! (4)
On the V r1000 ange an intermittent sound signal warns you when the,,
measured value exceeds the upper range limit.
Caution:
Ensure current measuring range ( mA or A ) is not selected’’ ’’ ’’ ’’
for voltage
measurement When the cut out rating of the fuses is exceeded because!-
of incorrect operation a dangerous situation exists,.!
Zero adjustment on the mV30 measuring range
Connect the test leads to the meter and join the free ends.
After having selected the measuring range briefly press the yellow multi,-
function pushbutton.(5)
The meter acknowledges zero setting by a sound signal the LCD shows,
’’00.00’’ 1 + .( digit)and the decimal point flashes The displayed voltage
at the instant the pushbutton is pressed is used as reference value,
(max 200 +digits)it is automatically deducted from the values measured
thereafter.
The zero adjustment is cleared when;
By pressing the yellow multifunctionpushbutton for a long time(5) ,
clearance is acknowledged by the two sound signal.
By switching the instrument OFF.
8. Voltage measurement
According to the voltage to be measured set the function selector,
switch to V(6)
,~ V or V .
Connect the test leads as shown The.’’ ’’socket should be
connected to the lowest potential ground available.
Function
MIN MAX/
2 x Short,
30 mV/
300 mV
and
0
C
1 x short
short
short
Short
Long
DATA
MIN MAX/
(3)
Measured
Values
MINandMAX
Stored
Storage Continued
in the background,
new MIN MAX/.
values are displayed
Same as,.1
Stored Values are
not cleared
Cleared
actual
meas-
ured
value
stored
MIN
value
stored
MAX
value
same
as.1
Cleared
MIN
and
MAX
flash
MIN
MAX
same
as.1
Cleared
Meteracknowledgement
Display
MIN
MAX
Meas-
uring
ranges
Sound
Signal
1.
Activate and
Store
2.
Store and
display
3.
Return to.1
Reset
1 x
1 x
1 x
1 x
2 x
Meas.
Value
digital
V
A
W
F Hz,%,
0
C
V
A
W
F Hz,%,
0
C
Same
as.1

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Voltagemeasurement
Voltagemeasurementonelectricalsystemsupto V1000
withtheKS measuringadapter30
22 98.
~/(-)+
~/(+)-
~/+
~/-
22 98.
8.1Voltage measurement on electrical systems up to
1000V with the KS30 measuring adapter.
On low Voltage systems transient overvoltages of several kilovolts can-,
occur due to switching functions or lightning discharges Direct connection.
of your multimeter to such systems for voltage measurement can be
dangerous.
For voltage measurements in power systems with nominal voltages upto
1000V, use the KS30 measuring adapter. It is an adapter for multimeter
which eliminates dangers caused by overvoltages and incorrect operation
of the multimeter It provides the following protective functions...
Protection of the input circuit of voltage measuring range of
multimeters The internal resistance of the KS limits the current in.30
the case of overvoltage.
Overload capacity contin: uously Vrms1200
Transient (rise m10 s fall m/ 1000 s) kV max6.
Safe suppression of sparking from spark plug after overvoltage.
Current limitation in the case of incorrect operation (e g applying a..
voltage to a current input)
Voltages above V can be measured with a high voltage probe1000 - ,
provided the necessary safety precautions are taken!
9. Current Measurement
First disconnect the power supply to the circuit being measured and/
or to the load and discharge all capacitors within that circuit,.
Select the DC current measuring ranges as described in section4.1
With the function selector switch select A,(6) for currents mA300< ,
and mA for currents mA When measuring current of unknown300> .
magnitude , select the highest measuring rangefirst.
Select the function corresponding to the measured quantity by briefly
pressing the yellow multi function pushbutton Each time the- .(5)
pushbutton is pressed alternate switching takes place between DC,
and AC on the RM 12...15 or between DC and (DC + AC)
on the RM 16. The change-over is acknowledged by a sound
signal The symbols DC and AC are displayed as per selected. (11)
function on the LCD.
When selecting a range with the function selector switch the DC,(6)
function is always set by default When pressing the yellow multi.-
function pushbutton for a long time the multimeter always switches(5) ,
back to DC and acknowledges this by two sound signals.
Connect the multimeter in series with the load as shown Ensure,.
that the connections are tight (without contact resistance).
Notes on Current measurement:
The multimeter must be used only in the power systems where the,
current circuit is protected by a fuse or a circuit breaker of A and20 ,
when the nominal voltage of the system does not exceed V500 .
Make the measuring circuit connections mechanically strong and
secure so that they do not accidentally open The conductor cross.
sections and connection points should be designed to avoid excessive
heating.
On the mA and A ranges ( A range for RM300 10 16 13), an
intermittent sound signal warns you when the measured value,
exceeds the upper range limit.
The current measuring ranges upto mA are protected to a short300

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Currentmeasurement
ACcurrentmeasurementwith clip on currenttransformers)-(
2 105.
~
~
A(9.1.1)
mA(9.1.1)
V(9.1.2)
~/(-)+
~/(+)-
2 105.
300...mA
mA
~/(-)+
~/(+)-
10 00.
10...A
A
circuit current of A by a fuse A V in conjuction with power25 1.6 500/ ,
diodes The cut out capacity of the fuse is kA at a rated voltage of.- 20
500V
~ and ohmic load.
The A and A current measuring ranges are protected by a A310 16/
600V fuse. The cut-out capacity of the fuse is 100 kA at a normal
voltage of V600
~ and ohmic load.
Caution:
The measuring ranges A and A of RM3 16 13 are not protected
by a fuse!
A blown fuse is signalled on the LCD the instant a measured quantity
having a voltage of more than V is applied to the corresponding4
connection sockets Then the digital display shows the word. , (9)
""FUSE
After a fuse has blown eliminate the cause of the overload before,
using the meter again!
Replacement of the fuses is described in section Maintenance.18 ’’ .’’
9.1AC current measurement with (clip-on) current transformer
9.1.1 Transformer output mA A/
Caution:
If current transformers are operated with an open circuit on the secondary
side e g due to defective or disconnected leads a blown fuse in the,. . ,
meter or a wrong connection dangerously high voltages can occur at,,
the connectors Therefore verify that the current circuit of the multimeter.,
and secondary winding of transformer connected to the multimeter
forman intact circuit Connect the transformer to the sockets. and mA
and or A/.
The maximum permissible operating voltage is the nominal voltage of
the current transformer When reading the measured value take into.,
account the transformer ratio and the additional error in indication.
Transformer output RM 12
The RM 12 shows the switching position ’’ A and the’’
corresponding sockets Connect to this socket a clip on current.)-(
transformer with a transmission ratio of then the measured values;1000:1
are displayed directly in the A range’’ ’’ .
9.1.2 T ransformer output V
Many transformers have voltage output (refered as mV A)/
The secondary output must therefore be connected to the connection
sockets and V.
10. Resistance measurement
Verify that the device under test is electrically dead External voltages.
would falsify the measured result!
Set the function selector switch to(6) " W."
Connect the device under test as shown.

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DiodeTest
Forwarddirection Reversedirection
Resistancemeasurement
0600
-
+
-
+
ContinuityTest
0000
-
+
-
+
2 105.
-
+
Zero adjustment on the30 Wmeasuring range
When measuring small resistance values on the 30 Wrange, you can
eliminate the resistance of the leads and contact resistance by zero
adjustment.
Connect the test leads to the multimeter and join the free ends.
Briefly press the yellow multi function pushbutton The meter- .(5)
acknowledges zero adjustment by a sound signal the LCD shows,
"00.00" 1+ .( digit) and the decimal point flashes The resistance measured
at the instant the pushbutton is pressed is used as reference value
(max digits) It is automatically deducted from the values measured200.
thereafter Zero adjustment can be cleared..
By pressing the yellow multifunction pushbutton for a long time and(5)
is acknowledges by two sound signals.
By switching the multimeter OFF.
11. Diode test and continuity test
Verify that the device under test is electrically dead External voltages.
would falsify the measured results!
Set the function selector switch to(6) " "
connect the device under test as shown.
Forward direction and or short circuit/:
The multimeter displays the forward vol tage in Volts As. long as the voltage
drop does not exceed the maximum display value of V you can also1.999 ,
rest several series connected elements or reference diodes with small-
reference voltage.
Reverse direction or open circuit:
The multimeter indicates overrange OL""
Note:
Resistors and semiconductor junction in parallel with the diode falsify the
measured results!
Diode test and continuity test with buzzer
With the buzzer function selected the meter emits a continuous sound"" ,
signal on the range approx V...0 1 . .
To switch the buzzer ON:
Briefly press the yellow multi function pushbutton- .(5)
The multimeter acknowledges turn ON with a sound signal At the same-.
time ,the symbol (18) .appears on the LCD
To switch the buzzer OFF
Briefly press the yellow multi function pushbutton again- (5) .
The multimeter acknowledges turn-OFF with a sound signal. The
symbol (18) .disappears from the LCD
When selecting the function Diode test and continuity test with the function"’’
selector switch the buzzer is always switched OFF Repeated brief,(6) .
pressing of the multifunction pushbutton alternately switches the buzzer(5)
on and off When pressing the push button for a long time the buzzer is.,
always switched OFF this is acknowledged by the buzzer,
sounding twice.

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12.Capacitance measurement RM 15 and 16
Verify that the device under test is electrically dead External voltages.
would falsify the measured results!
Set the function selector switch to F(6) " "
Connect the (discharged ) device under test to the!"
"’’’’and F
sockets via test lead.
Notes:
Connect polarised capacitors with the pole to the" " " ".socket
Resistors and semiconductor junctions in parallel with the capacitor falsify
the measured results!
Zero adjustment on the nF measuring range30
When measuring small capacitance values on the nF range the30 ,
internal resistance of the multimeter and the capacitance of the leads
can be eliminated by zero adjustment.
Connect the test leads to the meter without device under test.
Briefly press the yellow multi function pushbutton- .(5)
The meter acknowledges zero adjustment by a sound signal by,
displaying ( digit) on the LCD and by a flashing decimal""00.00" 1+
point The capacitance measured at the instant the pushbutton is.
pressed is used as reference value (max digits) It is automatically200. .
deduced from the values measured thereafter.
The zero adjustment can be cleared
By pressing the yellow multi function pushbutton for a long time- (5) ,
clearance is acknowledged by the two sound signal.
By switching the multimeter off.
13. Frequency measurement ( RM 15 and 16)
Frequency measurement is possible on all voltage measuring ranges in
AC DC and (AC DC) modes,+.
Set the function selector s witch to V(6 ~,V or V
Connections are made the same way as for voltage measurement,
See foot note on page(8) .21
Briefly press the yellow multi function pushbutton- (5)
The multimeter switches to frequency measurement The frequency.
is displayed on the LCD.
See section Specifications for the lowest measurable.17" "
frequencies and the maximum permissible voltages.
Changing over between voltage frequency and duty cycle,
measurement
Repeated brief pressing of the yellow multi function switch changes- (5)
the measuring functions in the following order:
Voltage frequency duty cycle voltage ....
From frequency or duty cycle measurement directly switching back,
to voltage measurement is possible.
by pressing the yellow multi function pushbutton for a long time- (5) .
The meter acknowledges this by two sound signals The voltage.
measuring range last selected is maintained.
by operating the function selector switch.(6)
14. Duty cycle measurement ( 15 and 16)RM
With duty cycle measurement we can determine the ratio of pulse,
duration to cycle time of recurring square wave signals-.
Set the function selector switch to V(6) or V
Connections are made in the same way as for voltage measurement
Briefly press the yellow multi function pushbutton twice- (5) .
The meter switches to duty cycle measurement The duty cycle that.-
is the percentage pulse duration of a signal is displayed on the-
LCDin%
That is: Pulse duration
Duty cycle = (%) x100
Cycle duration
Notes:
The applied frequency must remain constant during the duty cycle
measurement Change over between voltage frequency and duty cycle.- ,
factor measurement is done as described in the preceding section.
15. Temperature measurement
The RM 12...16 allows you to measure temperature with
Pt and Pt temperature sensors in the range100 1000
from-200 (-100)
0
C850+...
0
C.
Set the function selector switch to(6) " W"
Connect the sensor to the two unblocked terminals.
Briefly press the yellow multifunction pushbutton.(5)
The multimeter switches to temperature measurement it,
automatically detects the connected sensor (Pt to Pt ) and100 1000
shows the measured temper ature in
0
C on the digital display.
Notes:
This measurement automatically considers the lead resistance of
temperature sensors which are available as accessory.
It is not possible to switch over to temperature measurement when the 30W
Sensor lead resistance up to 50 W
Lead resistance of sensors having a value differing from that of
W
Briefly press the yellow multi function pushbutton again- (5) .
The LCD now displays the resistance value which the multimeter
automatically considers after selecting the temperature measuring
range We can recognise that this is the resistance correction value.
on the temperature measuring range The.’’
0
C character is’’
simultaneously shown on the display.
You can set the lead resistance correction value as follows:
Press the DATA MIN MAX pushbutton to increment the value or-- / (3) ,
the AUTO MAN pushbutton to decrement the value Each time/ (4) .
the pushbutton is briefly pressed the value changes by one digit,.
Briefly press the yellow multi function pushbutton again- (5) .
The LCD displays the measured temperature The flashing decimal.
point shows you that we have entered a correction value for the lead
resistance The correction value is retained as long as multimeter is.
switched on.
sensors can be considered up to a value of50 as follows:

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Each time the yellow multi function pushbutton is briefly pressed- (5) ,
the display changes between measured temperature and correction
value of the lead resistance.
We can exit the temperature measurement function
by pressing the yellow multi function switch longer this is- (5) ,
confirmed by the two sound signals.
by changing the function selector switch.
Note:
For the lead resistance the actual value measured on the digital,
multimeter should be taken as correction value and not any specified
value.
16. Computer interface via RS 232C
The RM multimeters are fitted with a serial RS C interface232-
for transmission of measured data to computer The measured values.
are optically transmitted through the case with infrared light to an interface
adapter which is attached to the multimeter The measured data is passed.
to the computer via a cable.
Switching the interface ON
When switching on the multimeter press the ON OFF pushbutton,"/"
(2) " -- / " (3) .and the DATA MIN MAX pushbutton together
With interface switched ON automatic turn OFF of the meter is,-
inactive .This is shown on the LCD by(1) flashing of the (8) symbol.
The DATA function cannot be activated’’ " .
Interface packs as accessories
Interface adapter with memory:
By using this adapter it is possible to store the measured data without
interfacing the multimeter to the computer This stored data can be.
transferred later on to a computer For establishing a powerful multimeter.
system you can connect upto ten multimeters offline Online connection.
upto six multimeters to the computer is possible via memory adapter.
The interface packs include the adapters the necessary connection,
cables and the com data acquisition and evaluation software" " 100
with operating instructions.
com software100
The com100 software package corsists of a WINDOWS version.
With com you can simultaneously access store display,100 , ,
and document the measured data of several RM multimeters.
The measured values are presented:
As digital display and analog indication similar to that of the
multimeter (up to multimeters).4
In traces (XY and Yt)as on a channel recorder-4 .
In tabular form (data logger upto channels):10 .
The measured data is stored in ASCll format for further processing.
For the use of com the following requirements must be met,100 :
ON
Software:
MS WINDOWS or higher3.0 .
Hardware:
IBM compatible PC with MB main memory for1 the WINDOWS version.
A VGA or EGA monitor.
A hard disk with MB free storage space2.
A disk drive for disks with MB storage capacity" 3.5 1.44 .
A MICROSOFT compatible mouse-
If you wish to make hardcopy
a printer supported by WINDOWS.