Gossen MetraWatt METRACAL MC, Operating Instructions Manual

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58 GMC-I Messtechnik GmbH
Calibration Functions: V – Hz –
Ω
– Temp – mA – mA
Example of a Periodic Ramp Sequence Controlled by Manual Intervention
Ramp parameters: output quantity: U (range of 0
…
15 V),
start = 2 V, end = 10 V, t1 = 5 s, t2 = 8 s, t3 = 5 s ,
repeat
for periodic ramp
Key
1 When
ramp
ready appears at the display:
Start the sequence by pressing
2 Stop the falling ramp within fall time t3 with the

or the

key.
3 Start a rising ramp within remaining fall time t3 with the

key.
4 Stop the ramp sequence by pressing the

or the

key.
5 Start a falling ramp with the

key, remaining dwell time t2 is
cleared.
6 Stop the ramp sequence by pressing .
6.7.3 Dual Mode (simultaneous simulation and measurement)
All simulation functions can be activated and, at the same time,
transmitter signal U or I can be measured in the most commonly
used measuring ranges (30 V DC or 30 mA DC) in the dual
operating mode.
Special case: simulation and measurement of voltage or current
without an external circuit. For example, if voltage output needs to
be tested, you only need to connect the Cal and Sense+
sockets to each other, because the Calibrator– and Sense– jacks
are connected internally.
Activating the Dual Mode
Ð
Select a simulator function with the rotary switch. The calibra-
tion operating mode must be activated (see section 6.1).
Ð
Press and hold the ZERO / SEL | ESC key for approximately 2
seconds, and select the U
dc
or I
dc
measuring function with the
 
keys.
Ð
Press the OUT | ENTER key in order to acknowledge your
selection.
Ð
Depending upon the calibration function, select either the
simulator range or the sensor with the
ZERO / SEL | ESC key.
Ð
Set the simulation value in the main display with the
 
keys.
Ð
Activate the output by pressing the OUT | ENTER key.
The respective measured values appear in the left-hand auxiliary
display, and
DUAL
appears to the right of the measured values.
Ð
Exit the “dual mode” function by turning the rotary switch, or
by pressing and holding the
ZERO / SEL | ESC key for
approximately 2 seconds, selecting OFF in the menu with the
 
keys and acknowledging with OUT | ENTER .
2 V
10 V
t1 t2 t3
LCD:
t3 t2 t1
â ê ô û á é
t1 up t2 run t3 dn t3 hld t3 up t3 run t3 hld t1 dn
U [V]
 
HOLD CONT
HOLD CONT
 
/
 
/ ESC
OUT
ENTER
ZERO /SEL
ESC