Limit Relays; Digital Control Lines; Analog Outputs - Magnet-physik EF 14 Operating Instructions Manual

Electronic Fluxmeter

7.3.1 Limit Relays

If the limit function is disabled or if the measured value is below the limit the normally closed
contact is connected to the center contact. If the limit is exceeded the normally open contact is
connected to the center contact.
Attention!
Maximum values for the relay contacts: Voltage

7.3.2 Digital Control Lines

Using the digital control lines, some functions of the EF 14 can be remotely controlled by
switches, relays or TTL lines. The functions are activated by pulling the respective line low
(active low).
Attention!
The maximum input voltage for the digital inputs is 5.5 V.
Assignments of the inputs:
Pin 24: HOLD
Pin 23: RESET
Pin 22: DRIFT
The status of the EF 14 can be requested using Pin 13:
Pin 13: HIGH
LOW

7.3.3 Analog Outputs

The analog output of the EF 14 is a real analog, real-time output. The main analog output can
be accessed on pin 18. It is scaled in Vs, the coil resistance is not taken into account.
Particularly in the integrator mode, one digit in the display corresponds to 0.1 mV output
voltage. An output voltage of ±1 V is achieved, if the range limit (±9999 digits) is exceeded.
The EF 14 has two other analog outputs, than are mainly designed for service purposes, but
may also be used by the operator.
Auxiliary analog output, ±5 V, pin 16: This output supplies a voltage that is amplified by a
factor of 5, compared to the main output. It can be used for example to connect the output of the
BA – no.: 100514EBA02
Holds the momentary reading in the display. The integrator continues to
operate.
Reset function. It sets the displayed value as well as Max., Min., and
Peak back to zero.
Drift function: If this pin is pulled to ground for a short time, the
automatic drift correction starts. After that, the pin must be left open or
set to high again, to prevent the drift correction from starting again after
ending. A request, if the drift correction is still active, can be carried out
using the ready output (pin 13).
The instrument is ready for operation:
The instrument is currently not measuring. For example a menu is
activated in manual operation or the drift correction is running.
Current:
th
December 9 , 2020
EF 14
u = 30 V
max
i = 1 A
max
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