Kamstrup MULTICAL 401 - Page 64

TECHNICAL DESCRIPTION MULTICAL
®
401
5512-091 GB/02.2008/Rev. J1
64
14.3.5 Heat coefficient in flow and return
When the calibration values for the temperature simulators are entered into the program, it automatically
calculates the true k-factor, according to the formula in EN 1434.
14.3.6
Test points
The test points 1st, 2nd, and 3rd are determined by the value of the temperature simulation resistances, which
are mounted in the test equipment. The rated temperature points are indicated in above section.
14.3.7
Measured resistance
In order to update the temperature simulators’ calibration, the temperature resistances’ latest measured
resistance values are entered. A calibration sheet with declaration of measured resistance values for all
simulators is supplied by Kamstrup A/S together with the verification equipment. The temperature simulators
must be calibrated at Kamstrup A/S once a year.
14.3.8
Enter number of integrations
In this field, enter the number of integrations required at each test point. Minimum required No. of integrations is
5, 2, and 1 concerning 1st, 2nd, and 3rd test. A higher number will reduce the reading uncertainty, but will
prolong the verification time.
14.3.9
Verification
All necessary information can be transmitted
directly from the calculator via serial data
transmission, which simplifies the
verification. Before test or verification can be
started, a control must be made to confirm
that all verification data are correct.
The procedure is started by clicking on
“Start test”.
The test takes between one and five minutes
depending on the number of integrations.
When the test is completed, the results are
shown on the monitor. If the results can be
approved, click on “Save”, and all
verification data will be saved in the
database under the calculator serial number.
It is possible to save data on both
verification and control. Up to 99 certificates
can be saved at each serial number (per meter).
Figure 58
NB: Type number must be typed in before clicking on “Save”.
If a printed certificate with the test results is desired, select “Print certificate” in the “File” menu, and the required
S/N is selected.
14.3.10
Maintenance
Verification equipment type 66-99-385 is designed to work a number of years with a minimum of maintenance.
The following must, however, be executed frequently in order to ensure optimal operation:
Recalibration
On delivery, a calibration certificate is enclosed issued by Kamstrup A/S. The applied calibrated resistance values
must be entered under “Verification data”. The equipment must be recalibrated once a year.