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Universal Measuring Device UMG 500A
I
Peak values
Universal measuring device UMG 500A stores the peak value and the date and time of registering for most of the
measuring functions. There is no storage of peak values for real work and reactive work. In the case of harmonic waves,
the peak values are stored without date and time. In the case of measurement function reactive power and cos
ϕ
, the
highest inductive value is stored.
To display the peak value, the respective measurement function must be selected. The peak value is displayed by pressing
the “+” key.
The peak value can be erased by pressing the appropriate function key (e.g. “P” for real power) and keeping it pressed
and additionally pressing the “-” key.
The date and time of the respective peak value can be called up by operating the following keys (in this example, date
and time are displayed for the peak value of current):
1.) Press and keep pressed down
2.) Additionally operate
Display
max
year
ΣΣΣΣΣ
days
L3
hours
L2
minutes
L1
seconds
f
.. / 5A
Software release
By pressing the two keys simultaneously, the number of the software version fitted in the
instrument can be displayed, e.g. “1.00”.
Date and time
The actual date or actual time can be displayed by using the procedure described under Peak values, but using key “../
5A” instead of the function key for the corresponding measurement value. In combination with the keys “+” and “-”,
the settings can be changed. There is no automatic changeover for summer time and winter time.
.. / 5A
1.) Press and keep pressed down
2.)Additionally operate
Display
max
year
ΣΣΣΣΣ
days
L3
hours
L2
minutes
L1
seconds
Threshold contacts
The functions “min” and “max” can be used to monitor a quantity to be measured. If the threshold contacts are used to
monitor real or reactive work, only the places in front of the decimal point of the measured value and the overflows are
taken into account. If the threshold contacts are used to monitor mean real power, the relays will switch only after a fixed
delay time of 30 seconds, which starts simultaneously with a new measuring period.
max
min
min
max
Allocation
In order to allocate the threshold function to a particular measurement function, the measurement
function and the measurement phase must first be selected. Following this, the function which
has been set is allocated to the threshold function by simultaneous operation of the keys shown on the left.
Programming
With the aid of these keys, the value can be set, which if exceeded or underscored, causes the corresponding
relay to operate.
W
.. / 5A
Device Address
The device address, which can be set by means of DIP- switches at the left hand side panel, can
be displayed by pressing these keys.
