Kamstrup MULTICAL 402, Technical Description, Page: 87 / 113

MULTICAL® 402
Kamstrup A/S · Technical Description · 5512-742_M1_GB_01.2016
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In the sketches on the previous page, each letter abbreviation represents a meter task. The abbreviations are
explained in the table below.
Abbreviation Description
FM Flow measurement
TM Temperature measurement
Measurement of T1 and T2 sensors starts
TRM Temperature reference measurement
Measurement of reference resistors starts
FB Flow calculation
Calculation of a flow average based on flow measurements saved since the latest flow calculation
TB Temperature calculation
Calculation of a T1 and a T2 value based on the latest measurement of reference resistors, T1 and T2
sensors. At the same time a dT (T1-T2) value is calculated
VEB Volume and energy calculation
Calculation of a volume value based on an average of flow measurements saved since the latest VE
calculation in proportion to the period of time passed since the latest VE calculation. This volume is
integrated in the meter’s volume register.
Calculation of an energy value based on volume and dT value for the period since the latest VE
calculation. This energy is integrated in the meter’s energy register.
B Calculation
Flow, temperature, volume and energy are calculated as described in FB, TB and VEB respectively.
13.2.2 Meter modes
The meter can operate in three different modes: normal, fast and verification mode. In normal mode the meters
runs the normal cycle (24 sec.). In fast and verification mode the meter runs the fast/verification cycle (4 sec.).
The difference between fast mode and verification mode is the fact that verification mode opens relevant
verification registers in the display, and at the same time different verification functions are opened.
13.2.2.1
Via the country code (the last three characters of the type number) the meter is configured to start in either
normal mode (24 sec.) or fast mode (4 sec.)
Choice of mode
Furthermore, the meter can be forced into verification mode by disconnecting the supply and restarting the meter
while keeping both front buttons pressed.
The meter remains in verification mode until the supply is disconnected and the meter restarted. However, a time-
out secures that the meter returns from verification mode to normal mode after 9 hours.
It is indicated that the meter is in verification mode in that the three dots in the right side of the display flash like
in fast mode. At the same time a P for ”test mode” is shown in that of the big 7-segments which is placed farthest
to the left in the display.