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Step 3 Turn square root extractor off
With 'root' displayed, press P which will
reveal the root extractor status. The root
extractor can be turned on or off by
operating the Up or Down buttons. Select
'OFF', and press E to return to the 'root'
prompt in the main menu.
Step 4 Select frequency of maximum mains
(line) rejection
Scroll though the main menu until 'Cond' is
displayed; press P which will result in the
instrument displaying '0000' with the most
significant digit flashing. To prevent
accidental adjustment the Cond sub-menu
is protected by the code word 'SurE'' which
must be entered character by character
using the Up and Down buttons plus P to
move control to the next digit. Note: S is
entered as 5. When 'SurE' has been
entered pressing E will result in the 'FrE'
prompt. Press P to enter the function and
using the Up or Down buttons select '50'.
Finally, press E twice to return to the
'Cond' prompt in the main menu.
Step 5 Define function of
P
push-button
Select
'C--P' from the main menu and press P to
reveal the function of the P push-button in
the operating mode. Select percentage
'PC' and return to the main menu by
pressing E.
Step 6
Define rate display resolution
Select 'rESn' from the main menu and
press P to reveal the current resolution of
the rate display. Using the Up and Down
push-buttons select a resolution of '1' and
return to the 'rESn' prompt in the main
menu by pressing E.
Step 7
Position rate & total decimal points
Select 'd.P.' from the main menu and press
P. The rate and total displays will be
activated with one digit of the total display
flashing. Press the Up or Down push-
button until the second least significant
digit and following decimal point of the total
display flash. This gives the required total
display resolution of 0.1
Press P to move control to the rate display.
Using the Up or Down push-button move
the flashing digit to the least significant
position (right hand side) which will result
in no decimal point in the rate display.
Finally press E to return to the 'd.P’.
prompt in the main menu.
Step 8 Calibrate the rate display
Scroll through the main menu until 'CAL' is
displayed. Press P and the instrument will
request a 4mA input by displaying 'ZErO'.
Set the input current to 4.0000mA and
press P again which will reveal the existing
rate display. Using the Up, Down and P
push-buttons enter the required zero
display of 0000 Press E to enter this
calibration figure. The instrument will
display ‘Ent’ for a few seconds before
returning to the 'ZErO' prompt.
Press the Up push-button and the
instrument will request a 20mA input by
displaying 'SPAn'. Set the input current to
20.0000mA and again press P which will
reveal the existing rate display at 20mA.
Using the Up, Down and P push-buttons
enter the required display of 1100 Press
E to enter this calibration figure. The
instrument will display ‘Ent’ for a few
seconds before returning to the 'SPAn'
prompt.
Finally press E again to return to the 'CAL'
prompt in the main menu.
Step 9 Define the timebase
In this example the rate display represents
flow per minute so it is necessary to set the
instrument timebase to 60. This will divide
the rate display by 60 to provide the
correct total display.
Select ‘t-bASE’ from the main menu and
press P to reveal the current setting.
Using the Up or Down button select ‘tb –
60’ and press E to return to the main
menu.
