25
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062
MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel
+45 45 56 06 56
www.mjk.com
3.7 Flow range / level range
This menu is mainly used to set the span of the mA out-
put in relation to the calculated flow, but can also be used
to check the flow calculation in relation to the measured
level based on the formula for the
selected primary device / flow calculation.
Simply enter the flow with the arrow keys and press EN-
TER, and MJK 713 calculates the corres-ponding level.
The mA output span is set by entering the flow value
where the mA output should give out 20 mA.
An example: If a 12” Palmer & Bowlus flume is
selected as primary device, the nominal maximum flow
will be 881 GPM at a level of 9.1 in.
If the flow range value is set to 881 in this menu, MJK
713 calculates the level, the mA output will give out 20
mA at max. nominal flow and 4 / 0 mA at zero flow.
If the flow range value is changed to 400 GPM, the mA
output will give out 20 mA at 400 GPM and upwards and
4 / 0 mA at zero flow.
4.0 Set digital output parameters
Press ENTER for configuring digital outputs or press
MENU for MAIN MENU
4.1 Select digital outputs (1-5)
Configuring of the five digital outputs. Select with the ar-
row keys which digital output to program, confirm with
ENTER.
Digital output 5 (DO5) is output for an external counter.
4.2 Select function for DO
For digital output 1-4 select with arrow keys between
various functions: counter output, sampler, flow > 0%,
flow high, flow low and alarm sensor error. The choice is
confirmed with ENTER.
Counter output:
After a preset quantity the output is
activated to trig an external counter.
Sampler:
After a preset quantity the output is
activated to trig a sampling device or a
chemical dosing device.
Flow > 0%:
Signal to indicate that the flow is greater
than 0 is applied, i.e. when measuring
emergency stormflow.
Flow rate high:
Activated if flow exceeds a given flow
rate.
Flow rate low:
Activated if flow drops below a given flow
rate.
Sensor error:
Activated at sensor error. Factory default
is 5 minutes without an approved sensor
signal.
Output disabled:
Output not used.
4.3 Alarm flow rate low
The limit for flow low is keyed in using the arrow keys.
The span is 0 - 90 % of max. flow.
4.4 Alarm flow rate high
The limit for high flow is keyed in using the arrow keys.
The span is 10 - 100 % of max. flow.
4.5 Set volume between pulses
The volume that passes between each time a pulse is
sent to a DO is keyed in. The interval between the pulses
is limited to min. 1 sec.
4.6 Digital output ON-time
The ON time for the DO is keyed inusing the arrow keys.
Double arrow changes the value fast with 1 sec. jumps.
Single arrow changes the value slowly with 0.1 sec.
jumps. The range is 0.1 - 30 sec.
