Kamstrup MULTICAL 401, Technical Description

Page: 63 / 75

TECHNICAL DESCRIPTION MULTICAL
®
401
5512-091 GB/02.2008/Rev. J1
63
66-99-385
Standard (EN 1434)
Type 66-W T1 [°C]
160
80
43
T2 [°C]
20
60
40
Figure 56
14.3.2 Function
Verification equipment 66-99-385 is mounted in a standard MULTICAL
®
base and contains battery, connection
print, verification print, microprocessor, control relays and precision resistors.
Connection between the verification equipment and MULTICAL
®
401 is made by the use of an 14-pole test plug.
During testing the calculator is supplied by the battery.
The verification print is supplied via the associate external mains adaptor with 12 VDC.
The microprocessor simulates the volume based on the number of integrations per test point determined in the
computer program. Temperature is simulated by means of permanent precision resistors which are changed
automatically via relays controlled by the micro-processor.
After testing the computer reads all registers in the calculator and compares the values with the calculated
values.
Deviation, determined for each test point – indicated as a percentage – can be printed on a test certificate or
stored in the computer under the serial number of the tested MULTICAL
®
401.
14.3.3 Verification data
The first time that METERTOOL and the
verification equipment are used, a number of
calibration data must be entered in the menu
“Verification data”. As this data is of crucial
importance for the verification result, they are
protected by a password which can only be
disclosed by Kamstrup A/S.
Figure 57
14.3.4 Permissible error and uncertainty
Max. permissible error, indicated as a percentage, and the equipment’s measuring uncertainty must be indicated
under each of the three verification points; 1st, 2nd, og 3rd. The “permitted error” minus “uncertainty” will be
indicated as MPE on the verification certificate.
According to EN 1434, MPE is ±(0.5 +
Δθ
min./
Δθ
)%.