Elster Instromet 2000, Instruction Manual

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Model 2000 Flow Computer Instruction Manual
3.0 INSTALLATION, INITIALISATION & CALIBRATION
Model 2000 issue 21 Page No
63
extremes of the intended operating area. At any time in the calibration session the operator can revert back to either the
DEFAULT or PREVIOUS calibration by operating the RESTORE function key and selecting the appropriate item.
The user can go on to calibrate as many Analogue input parameters as are required. Once all the changes are complete the
user can leave the EDIT section by selecting the function key EXIT. Selecting the EXIT function will prompt with a EXIT
menu as follows:-
Exit & Save Exit the calibration mode, save the changes to memory and use the new values.
Exit & No Save Exit the calibration mode, do not action any of the changes made.
Undo Do not exit calibration mode and undo all previous changes in this session.
3.5.2. OUTPUT SIGNALS
3.5.2.1. DIGITAL OUTPUT SIGNALS
The Digital Output signals in the Model 2000 do not require any customer calibration to be carried out.
3.5.2.2. ANALOGUE OUTPUT SIGNALS
The Analogue Output signals are factory calibrated and should not require any customer adjustment, however, each Output
has individual Gain (G) and Zero (Z) controls which can be adjusted to customer settings if required.
Controls VR2(Z) and VR1(G) adjust Output 1 pins A13 and B13
Controls VR4(Z) and VR3(G) adjust Output 2 pins A14 and B14
Controls VR6(Z) and VR5(G) adjust Output 3 pins A15 and B15
Controls VR8(Z) and VR7(G) adjust Output 4 pins A16 and B16
In order to assist calibration the Analogue Outputs can be set either to the minimum value (0mA or 4mA ) or to the maximum
value (20mA or 24mA) by using the following procedure. When the CALIBRATION menu item is selected the user will be
prompted to enter a four digit numeric password, to gain access to the calibration pages. It is possible to set-up a maximum
of three different passwords and each of these passwords can be set to allow access or not to the calibration pages, these
passwords are the same as used in the EDIT mode. In its factory default condition the three available passwords are 1111,
2222 and 3333. Once the password has been entered and accepted a calibration sub menu will appear as follows:-
Outputs Selects calibration of any Analogue output.
Analogue Selects calibration of any Analogue input.
Hart Selects calibration of any Hart Loop input.
Exit Returns operation to the Main Menu.
All Analogue outputs can be calibrated on the Output calibration page. The operator is prompted to:
Select the level of the analogue
outputs
The F1 key will then select the Minimum range value either 0mA or 4mA, the value will depend upon the actual setting of the
output board.
The F2 key will then select the Maximum range value either 20mA or 24mA, the value will depend upon the actual setting of
the output board.
NOTE All Analogue Outputs in the M2000 will be set to either the Min or Max values at the same time when the unit is
operated in this mode.
The user can go on to calibrate as many Analogue Output stages as are required. Once all the changes are complete the
user can Exit the EDIT section by selecting the function key EXIT. Selecting the EXIT function will prompt with a EXIT menu
as follows:-
Exit & Save Exit the calibration mode, save the changes to memory and use the new values.
Exit & No Save Exit the calibration mode, do not action any of the changes made.
Undo Do not exit calibration mode and undo all previous changes in this session.
All Analogue Outputs will be set to the normal operating function after leaving the Calibrate mode.