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KEYPAD OPTIONS
The output options can only be adjusted
and operated in flow mode.
Pulse Output Key
Use the scroll key to move the cursor up
or down the display. To change the flow
units press the key required. This will also
change the flow units when returning to
the flow mode. Changing the flow units will
also re-scale the litres per pulse.
PULSE OUTPUT
Flow units
Output OFF
Max. pulse rate1 per sec
Litres per pulse XXXXX
Exit
Outputs allow the user to select from the
following.
1. Selecting Off switches the pulse
off and returns to the PULSE
OUTPUT display.
2. Selecting the Forward total
counts the pulses of the forward
flow only.
3. Selecting Net total counts the
pulses of the sum of the forward
total less the reverse total.
OUTPUT
Off
Forward total
Net total
Max. Pulse Rate
This option allows the user to select
between fast/slow pulses or large/small
pulse width. Select 1 per second for slow
pulses and 100 for a fast pulse. The pulse
width for 1 per second is 100ms and 5ms
for 100 per second.
XXXX per pulse
This will change when the flow units are
changed above. When the correct flow
units are selected this allows the user to
scale the pulses to there own
requirements or it can be left in the default
setting.
4 - 20mA Output KEY
The 4-20mA Output can be scaled to the
minimum and maximum flow rate. It is also
possible to enter a negative figure for the
minimum output and would enable a
reverse flow to be monitored. For example
the 4mA would be the maximum reverse
flow (e.g. –100 lpm) and the 20mA would
be maximum positive flow (e.g. +100 lpm).
mA Out
This displays the current output at any
particular time.
yy-mm-dd hh:mm:ss
4-20MA
Units l/m
Flow at max. xxx
Flow at min. xxx
mA for error 22.0
Exit
Output
This option allows the user to select
between three different outputs or
switching the output off. The display will
read as follows. Scroll down the options to
select required output, and press ENTER.
The display will then revert back to the 4-
20mA menu and Flow at max. output.
yy-mm-dd hh:mm:ss
OUTPUT OFF
4 - 20mA
0 - 20mA
0 - 16mA
The Units
The flow units can be changed at this
stage by selecting them from the keypad.
When selected, scroll down to move onto
the next option.
Flow at Max. Output
This sets the output at the top end of the
scale so that the maximum flow gives
20mA (or 16mA).
The instrument automatically defaults to
the maximum flow rate. The user can
press ENTER and set the output to a level
required. When selected press ENTER to
continue.
If the flow was over the maximum range
set, the instrument will go to a maximum of
24.4 mA and stay there until either the flow
reduces or the output is re-scaled. The
instrument will also display a warning
message- mA out over range-if the
output is greater than 20mA or 16mA.
Flow at Min. Output
This sets the output at the bottom end of
the scale so that the minimum flow gives
4mA or 0mA.
The instrument automatically defaults to
zero, but the user is able to enter any