19
Step 4 Select frequency of maximum
mains (line) rejection
Scroll though the main menu until
'Cond' is displayed and 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 should 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
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
,
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
Scroll though the main menu until 'd.P.'
is displayed and then 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 of the
total display and following decimal point
are flashing i.e. a 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 being displayed.
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 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 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
and return the instrument to the 'SPAn'
'prompt' and again to return to the 'CAL'
prompt in the main menu.
Step 9
Define the timebase
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
and
Down
push
buttons select 'tb - 60' and then return
to the main menu by pressing
E.
