Switchover 2- /4-Conductor; Connection Flow Sensor (Fs); External Power Supply; Function Test - Zenner WR3 Notice D'installation Et D'utilisation

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Switchover 2- /4-conductor

Calculators equipped with 4-wire
measuring system can be switched
to 2-wire with the switch on the
top left side of the connection
board. Switch to the left for 2-wire,
switch position on the right for
4-wire measurement.

Connection flow sensor (FS)

The total length of the wire
between flow sensor and calcula-
tor should not exceed 10 m. With
mechanical flow sensors the con-
nection order is optional. Mind the
polarity at electronic flow sensors.

External power supply

A small vertical line appears in the
display when the optional external
power supply is on service. In case
of a failure of the external power
supply the devices switch auto-
matically to battery supply. The
battery lifetime can be checked in
the display (level 3).
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Function test

Check the calculator for any error
codes in the display after instal-
lation (see table for error codes).
Most of the errors can be deleted
by pressing the button. If the error
appears permanently, it will be
detected at the next measuring
cycle and displayed again. Check
whether the volume information
is updated and the displayed
temperatures correspond to the
present ones while the system is
running (measuring cycle 2 min-
utes max.).
Only valid for Germany: For pure
cold meters with regular run-
ning system must be displayed a
negative temperature difference.
When attaching the top cover on
the housing pulses on the inputs
can possibly be generated. Check
readings of the inputs and correct
if necessary.

User safeguard

Seal the device with the included
user seals to prevent unauthorized
opening.

Maintenance

Repairs or overhaul are only
allowed by the manufacturer or
companies authorized by the
manufacturer.