Calibration and Adjustment Instructions for MC5 Multifunction Calibrator
For Main Firmware Version 1.90
Page 3/16
General
The tolerances, linearity errors and temperature factors of the components used in the Beamex
Calibrators have been carefully considered during the specification tests at the factory. All nec-
essary parameters have been saved into the EEPROM memory of each measurement module.
It is not necessary to renew the calibration if certain components in the analogy part of the cali-
brator are not replaced. Anyhow, some characteristics can deviate from the original values dur-
ing the time. The periodical calibration is thus necessary in order to maintain the full accuracy of
the calibrator. In the beginning of the calibrator’s life span, the recommended calibration period
is one year. When the calibration history has been established, the calibration period can be
extended.
The whole calibration procedure can be made without opening the calibrator. The calibration
procedure is made as easy as possible. The calibration requires, however, some very accurate
instruments. If You do not have all the necessary calibration instruments, send the device to
Beamex’s accredited calibration laboratory for calibration.
Equipment Required for Performing the Calibration
For the complete calibration you need the following equipment:
1) DC calibrator, capable of generating the
- currents, voltages and low voltages measured with the E module.
- low voltages measured with the ET module.
2) DC meter(s), capable of measuring the
- currents generated with the E module
- currents, voltages and low voltages generated with the ET module
- generated voltages in the calibration of the ET module's resistance simulation.
3) Frequency generator capable of generating the frequencies measured with the E module.
4) Frequency measurement meter, capable of measuring the frequencies generated with the
ET module.
5) Precision resistors, for calibrating the ET modules resistance measurement.
6) A good quality thermocouple of type E, J, K or T. The sensor wires should be continuous
without extension or plug. The error of the sensor output at the condition where the sensor is
in the used temperature reference and the reference junction in 20 to 30°C should be known
and taken into account in the calibration.
7) An ice bath or another known temperature reference. The combined uncertainty of the tem-
perature reference and the thermocouple together should be less than 0.05°C.
8) A dead weight tester with the accuracy of 0,02 % RDG or better for the generation of the
necessary testing pressures. Required for the different pressure modules used with the cali-
brator.
You can replace items 6 and 7 with a small size temperature sensor and measuring device with
calibrated accuracy better than 0.05°C. The sensor must be small enough to fit inside the RJ
module. It should not noticeably conduct heat to or from the environment.
The accuracy of the necessary equipment should be about three times better than the accuracy
specified for the calibrator (see the calibrator’s Technical Data Sheet). If the accuracy of the
calibration equipment are worse, the calibration period should be shorter.
