Nova-Tech LMI Roytronic Series A Metering Pump - Manual (Page 16)

16
OPERATION
4.0 Operation
4.1 Output Adjustment Controls
1. Power/Mode Selection Button: This button allows convenient starting
and stopping of the pump. For pumps with external control capability
(A3, A7, A8) this button switches pump operation between internal and
external modes. When operating in internal mode the Pulse Indicator
Light will flash green. When operating in external mode the Pulse Indica-
tor Light will flash yellow.
2. Speed Adjustment Knob: This knob provides adjustment of the stroking
speed. For pumps with this knob (A1, A7, A8) turning this knob clockwise
P increases stroke frequency (speed) from a minimum of 1 stroke per
minute.
3. Stroke Adjustment Knob: This knob provides adjustment of the stroke
length. Turning this knob clockwise P increases the stroke length, which
results in a higher amount of chemical displaced per stroke. It is recom-
mended that the stroke range stay between 20% and 100%.
4. Pulse Indicator Light: This light will flash green when pumping in internal
mode, and will flash yellow when pumping in external mode. The light is
on between strokes and off during the actual stroke.
5. Low-Level Indicator Light: This light will turn red when a Low-Level
Sensor registers a low chemical level. This will turn off the pump. You
must have a Low-Level Sensor connected to the pump through the Low-
Level Connector for this function to operate.
6. Low-Level Connector (3-Pin): This connector is for the connection of a
Low-Level Sensor (48413). The low-level switch input connections are
always active for all models in all functional modes. If the fluid level drops
below the level specified by the Low-Level Sensor, the pump will stop and
the Low-Level Indicator Light will turn on. The pump is designed to
recognize an open circuit as full, and a closed circuit as empty. The pin
functions are as follows:
1. Low Level Signal
3. No Connection
4. Ground/Return Connection
➂
➀
➁
➅
➃
➄
➆
1.0000
D
E
DETAIL D
SCALE 5 : 1
DETAIL E
SCALE 5 : 1
➂ ➀
➃