Model 247 Product Safety Features - Ranger 247 Operator's Manual

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Ranger Irrigation Fluid Warming System

Model 247 Product Safety Features

The following chart describes the safety alarm features of the Ranger Irrigation Fluid warming unit.
ALARM TyPE ALARM TyPE
Primary over-temperature Primary over-temperature
alarm system alarm system
Independent back-up Independent back-up
over-temperature alarm over-temperature alarm
system (cut-off). system (cut-off).
Under-temperature alarm Under-temperature alarm
:
The difference in over-temperature alarm system cut-off points does not indicate any difference
note
in safety and is simply a result of tighter controller tolerances.
The Ranger Irrigation Fluid Warming System is designed with very tight controls to regulate its temperature
to the 41°C set-point. The microprocessor controller measures the temperature at the fluid pathway inside the
warming plate four times every second, making it very responsive to changes in flow rate.

SET-POINT SET-POINT INDICATION INDICATION
48°C 48°C LED alternately displays LED alternately displays
"HI" and temperature, "HI" and temperature,
alarm sounds, alarm light alarm sounds, alarm light
flashes. flashes.
50°C 50°C LED displays the LED displays the
temperature or has gone temperature or has gone
dark, alarm sounds. dark, alarm sounds.
33°C 33°C LED displays "LO" LED displays "LO"
and temperature, alarm and temperature, alarm
sounds, alarm light sounds, alarm light
flashes. flashes.
DESCRIPTION DESCRIPTION
Primary Alarm: Alarm sounds, Primary Alarm: Alarm sounds,
controller cuts power to the controller cuts power to the
heaters until temperature falls heaters until temperature falls
below 41°C. When heater below 41°C. When heater
temperature drops below 41°C temperature drops below 41°C
(in a few seconds), audible and (in a few seconds), audible and
visual alarms stop. visual alarms stop.
Primary failure. Temperature Primary failure. Temperature
will rise to 50°C within a few will rise to 50°C within a few
seconds. The safety backup seconds. The safety backup
system is activated at 50°C and system is activated at 50°C and
power is immediately shut off power is immediately shut off
to the to the
heating plates. heating plates.
Heater temperature has fallen Heater temperature has fallen
to 33°C. Alarms will stop to 33°C. Alarms will stop
when temperature rises above when temperature rises above
33°C. Continue use of unit. 33°C. Continue use of unit.