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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 from the external calibrator
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 and return the
instrument to the 'ZErO' prompt.
Press the Up push-button and the
instrument will request a 20mA input
by displaying 'SPAn'. Set the input
current from the external calibrator
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 twice to enter this
calibration figure and return the
instrument 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.
