Xylem A-100NV DIGITAL PERISTALTIC PUMPS - Manual (Page 16)

7.0 ALARMS -
7.1 TFD - Tube Failure Detection system - The A-100NV is equipped
with a Tube Failure Detection System which is designed to stop the pump
and provide a contact closure output in the event the pump tube should
rupture and chemical enters the pump head. This patented system is capable
of detecting the presence of a large number of chemicals including Sodium
Hypochlorite (Chlorine), Hydrochloric (muriatic) Acid, Sodium Hydroxide,
and many others. The system will not be triggered by water (rain, condensa-
tion, etc.) or silicone oil (roller and tubing lubricant). If the system has
Chemical
Tubing failure
detected chemical, the pump tube must be
replaced and the pump head and roller
assembly must be thoroughly cleaned.
Press the RUN/STAND-BY and FIELD
buttons at the same time (prime mode), to
remove the pump tube. Thoroughly clean
the pump head and roller assembly. Press
the RUN/STAND-BY button to reset the
system.
Confirm Chemical Detection - To determine if your chemical will be
detected by the system, remove the pump tube and roller assembly. Place a
small amount of the chemical in the bottom of the pump head - just enough
to cover the sensors. Turn on the pump. If the TFD system detects the
chemical, the pump will stop after a five second confirmation period and
the ALARM icon will light on the display. If the TFD system does not
detect the chemical, the pump will continue to run after the confirmation
period. Carefully clean the chemical out of the pump head being sure to
remove all traces of chemical from the sensor probes. Press the
RUN/STAND-BY button to clear the alarm condition and restart the pump.
Contact Closure Alarm Output - A contact closure output (relay) is
provided with the TFD system. The relay can be configured for normally
open (factory default) or normally closed operation by properly positioning
the connector plug on the circuit board (see page 7).
A-100NV
Page 16