17
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. 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
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.
