Glossary UH50 – FOR INTERNAL USE ONLY!
Gyr GmbH
Glossary UH606-101b
Page
23
of
38
Automatic power source detection
The power supply unit detects whether a line voltage is applied. This signal is routed to the
UH50
. That enables the unit to detect automatically whether it is powered from a battery or a
power supply unit.
Depending on the power supply detected, the measurement timebase for the flowrate and
temperature is switched over. The
measurement timebases
(measuring intervals) can be set in
calibration mode
.
Power source detection is performed after each flowrate measurement. If a power failure is
detected, the meter switches
the interval to the value of battery mode
. A return
to the value of
line mode
happens at the earliest after 2 minutes. This is followed by evaluation again.
On each switchover between line and battery operation, the
prescalers
are taken into account.
Power supply unit variants
24 V ACDC
(terminals)
110 V AC, 230 V AC
(cable length 1.5 / 5 / 15m)
Battery variants
Requirements
(for measurement timebase Q = 4 s
and measurement timebase T = 30 s)
6 years
11 years
No M-bus fast read-out,
without controller function
2x AA
D
M-bus fast read-out
or fast pulses
or analog module
or radio module
D
--
Battery compartment
Inserting a battery
Press the four side tabs of the housing cover inward and remove the cover. Then turn the label
plate counterclockwise until you feel it has gone as far as it will go.
Swing open the red locking hatch to expose the relevant battery compartment (left compartment
for 2x “AA” or “C”, right compartment for “D”).
Insert the battery into the relevant compartment of the electronic unit with the correct polarity as
marked.
Turn the label plate back clockwise into its original position.
Note: AA and C size batteries are snapped into a holder.
Locking hatch
Plug connector
