Flowserve LRR1-40 TDS Control Unit - Manual (Page 11)

11
Explanatory Notes
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Technical data
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Indicators and adjustors
Four pushbuttons as operating elements.
Four LEDs for indicating the operating modes.
One green LED for power supply.
One red LED for status indication of CAN bus.
One 10- pole code switch for setting node ID and baud rate.
Setpoint W
Adjustable within the measuring range between the adjusted MIN / MAX limits.
Control range (configuration as proportional controller)
Beginning: 0.5 x setpoint W up to 1.5 x setpoint W
Dead band (configuration as proportional controller)
Based on setpoint W:
Setpoint W below 2000 µS/cm (1000 ppm) DB = 3%
Setpoint W above 2000 µS/cm (1000 ppm) DB = 1%
Switching hysteresis of controller output (configuration as 2-position controller)
Adjustable between 1 and 25% of the adjusted setpoint.
Operating position of the continuous blowdown valve
Adjustable as a function of the continuous blowdown valve.
Proportional band Xp
From 1 to 150 % relative to setpoint W (configuration as proportional controller),
adjustable, 0% (configuration as 2- position controller).
MIN/MAX limits
Measuring range up to 200 µS/cm (100 ppm):
MIN limit adjustable between 0.5 µS/cm (0.25 ppm) and MAX limit
- 2 µS/cm (1 ppm),
MAX limit adjustable between 200 µS/cm (100 ppm) and MIN limit
+ 2 µS/cm (1 ppm).
Other measuring ranges:
MIN limit adjustable between 0.5 µS/cm (0.25 ppm) and MAX limit
-20 µS/cm (10 ppm),
MAX limit adjustable between end of measuring range and MIN limit
+ 20 µS/cm (10 ppm).
MIN/MAX limits,
Switching hystereses
MIN limit: + 1% of the adjusted MIN limit,
MAX limit: -1% of the adjusted MAX limit.