User Manual

46 GMC-I Messtechnik GmbH
Calibration Functions: V – Hz – Ω – Temp – mA – mA
6.3 Pulse, Frequency Generator (positive square-wave pulse) [Hz]
Voltage and frequency can be set independent of each other for
frequency generators.
The output signal is a square wave. Resistance of the connected
circuit should not be any less than 1 kΩ.
Ð Select the /HZ calibration function with the rotary switch.
Ð Switch the calibrator on by pressing the ON / OFF | LIGHT key.
Ð Connect the device to be calibrated with the measurement
cable in the same way as specified for the voltage simulator.
Ð Set the voltage range (300 mV, 3 V, 10 V or 15 V):
Switch to the voltage range menu by pressing the
ZERO / SEL | ESC key twice [
select range]. Select the desired
voltage range with the  keys. Acknowledge your selection
with OUT | ENTER. The display is switched to the voltage
amplitude entry window.
Ð Set voltage amplitude (0 … 15 V):
Select the digit to be changed with the   keys, and change
the respectively selected digit with the  keys. Acknowl-
edge your selection with OUT | ENTER. The display is switched
to the frequency entry window, but the selected voltage am-
plitude still appears in the auxiliary display.
Ð Set frequency (1 … 2000 Hz):
ON indicates: Voltage is applied directly to the output using the se-
lected frequency!
Select the digit to be changed with the   keys, and change
the respectively selected digit with the  keys.
Ð The output can be activated with the OUT | ENTER key, or
deactivated [
Stdby] once again.
Note

The following error messages are possible: “HiCurr” (high
current – current at overload limit) where I
max
.=18mA,
“0ut0l” and 3 acoustic signals (out of limit – limit value
exceeded) where I > 27 mA; the simulator is switched off.
Attention!
!
No external voltage may be applied to the calibrator jacks in this
operating mode. The calibrator is protected against brief
application of large external voltages with a replaceable fuse in the
event of operator error (see section 10.3).
Abbreviated Instructions
Select calibration function.
Set the voltage range (starting from frequency display).
select range 15 V  …  60 mV
Set voltage amplitude (starting from frequency display).
000.00 V  
Set frequency.
0000.0 Hz  
Activate output:
Hz
ON/OFF
LIGHT
ZERO/SEL
ESC
ZERO/SEL
ESC
OUT
ENTER
ZERO/SEL
ESC
OUT
ENTER
OUT
ENTER