i
ndu
Q
®
- Series VMM
Operation
Technical changes reserved
- 41 -
Example:
The default setting for the monitoring func-
tion for the field coil current is „on“.
For changing the parameter please refer to
the description in Section "Selection window
/ make a selection".
Notice
During the sampling time for the field
coil current of 0.5 seconds, the trans-
mitter is offline. The last measured
value will be shown at the signal out-
puts.
Self-test period (STP)*:
Using this function the time gap for the peri-
odical measurement of the field coil current
is defined.
The time gaps can be set within bounds of
35
to 999 s
.
After selecting the function Self-test period
(STP) using the key
or
, press the
ENTER key for entering the parameter level.
The current setting for the STP will be dis-
played:
Example:
For changing the parameter please refer to
the description in Section "Input window /
modify a value".
* The parameter
Self-test period (STP)
is of
relevance only, if the parameter
Self-test
is
set to „on“.
Reference calibration on / off:
The function
Reference calibration
on/off
is used to enable or disable the peri-
odical recalibration of the transmitter. This
function is useful for periodical self-
monitoring and for maintaining the long-
term stability of the display electronics.
After choosing the function
Reference cal-
ibration on/off
by the use of key
or
and pressing Enter, the following selection
field will be displayed:
Example:
For changing the parameter please refer to
the description in Section "Selection window
/ make a selection".
Reference calibration period (GAP):
This function
Reference calibration pe-
riod
is used to define after how many STPs
the reference calibration will be performed.
Example:
The Self-Test period (STP) is set to 40 sec-
onds. The reference calibration should be
performed every 6 hours. Therefore you have
to enter for the GAP:
5400
40s
3600s
6
GAP
=
⋅
=
For selecting the desired function within the
class please use the key
or
.
After selecting the function
Reference cal-
ibration period (GAP)
using the key
or
press the ENTER key. The current set-
ting for this parameter will be displayed:
Self-test
[off]
Self-test
STP = 040 s
Reference calib.
[off]
Self-Test period STP
1 hour = 3600 s
