TECHNICAL DESCRIPTION
MULTICAL
®
41
5512-313 GB/01.2010/Rev. C1
37
12.1
Testing mode
Extra display readings
In addition to the display readings in standard mode there is an extra testing counter/verification register for
volume. The testing counter appears as extra readings immediately after the main counter for volume (Q). The
resolution of the extra testing counter is for volume (Q’) 1 [ml]. The main counter does not change unit or
resolution in testing mode.
NB.: The resolution for the extra testing counter applies to all meter sizes.
Testing mode
The meter can be switched to testing mode by pressing the internal button marked ”P” for approx. 5 sec. or
serially through the test plug in the meter. When the meter is in testing mode a “P” appears to the left in the
meter display. The internal push button is placed under the top cover. When the internal push button is activated
the meter changes to testing mode, whereas subsequent activation for 5 seconds brings the meter back to
standard operation.
In testing mode MULTICAL
®
41 runs through an integration sequence of 4 sec. Through this sequence the water
flow is measured with an average interval of 1 sec. At the end of the sequence the volume calculations are made.
All display values are updated with an interval of 4 sec.
To be able to operate the internal button and the test plug, modules or seals, if any, over the test plug must be
removed.
Resetting test counter Q’
This extra counter is reset by briefly pressing the internal button marked ”P” or serially.
When resetting the testing counter, the internal water residue in the meter is also reset. This means that
accumulated water may be missing in the main counters after repeated resets.
Standard mode
The meter can be put into standard mode again by pressing the internal button marked “P” for approx. 5 sec. or
serially via the test plug in the meter. If the meter is not put into standard mode, it will automatically change into
standard mode after approx. 8 hours. When the meter has returned to standard mode the “P” which earlier
appeared in the left side of the meter’s display will be turned off. Instead an “E” may appear in the left side of the
display (see section 7.4
Information codes
).
External control of testing counter Q’
It is possible to control the testing counter externally by means of a switch function. The switch must be
connected to pins 16 and 11 of the test plug. Only possible when pins 7-8 are short-circuited under the
verification seal. The function works as follows:
1. When the connection is established, the verification register Q’ is reset, and the counting starts
2. When the connection is released, the verification register Q’ is locked
3. Subsequently, the register can be read from the display or serially
4. A new test point can be carried out starting from point 1