JRP Edge Digital Gauge
-
AFR + Spartan 3 CAN
14point7 MS3 Appendix Page: 11 onwards.
Page 3 of 10
Manual - 52mm Edge AFR + Spartan CAN
•
To make changes to your new gauge, use the button on the back of the gauge or the remote button included in each kit.
(Both provide the same function). The button can be used to scroll through the menu. Short press will take you through the menu
options, long press on the displayed option will take you into the setup menu for that selection. Make adjustments to that menu
option using short presses, when the setting displays the required value, wait five seconds to return to live data to be
display - Saved. (This will confirm and save your set up option). See page 4 for detailed button operation.
*Note* Day and night time modes can be set to display different settings shown in a table on page 4. You have to enter the night
time mode to make changes to night time menus. (Night mode is triggered from a 12 volt signal input from the yellow power wire).
Common Button Operation
EDGE
Gauge
How Does An Oxygen Sensor Work?
Important - How Does An Oxygen Sensor Work? (In Detail)
If given some thought, it’s actually pretty crazy the harsh environment oxygen sensors are required to operate in.
Put simply: Oxygen sensors read oxygen levels in hot gasses traveling through the exhaust system. The sensor will produce an
accurate voltage signal within ‘milliseconds’ then send that information through specialised cables to be interpreted by a
“Wide
band controller”
or “
Electronic control unit
(ECU).”
The sensor element tip is made from a special material called Zirconium-Dioxide. When the sensor element reaches a temperature of
400c or more, Oxygen ions (Electrically charged gas particles) are able to dissolve through this Zirconium-Dioxide material.
This unique material reaction also produces a reliable electronic signal which makes it possible to measure if there is a difference in
oxygen concentrations on either side of the element.
To ensure that the sensor reaches this required temperature quickly. A separate ceramic heater is positioned inside the element.
Within 15 seconds the heater can reach temperatures over 600c degrees to ensure that this unique reaction can take place and
produce a reliable signal for the Wide-band or ECU to interpret.
(internal temperatures, caution while handling - external
temperatures can still burn cause burns or injury)
WARNING!
Oxygen sensors used incorrectly are vulnerable to thermal shock! Thermal shock is highly likely If “
liquid
” water hits the
sensor while it’s at operational temperature.
“
But why would I have water in my exhaust?”
Great question! Well that’s actually pretty normal. You see, if a vehicle is
used for more then a few minutes it will come up to normal operating temperature. When it is turned off, fresh air from the
environment will enter the exhaust system. When this “air” is allowed to cool slowly, it will build up water condensation on
all surfaces
inside the exhaust system. So the next time you start the vehicle from cold, exhaust gasses will push most of the condensed water
droplets out of the way. Maybe a teaspoon of actual liquid will come out the tail pipe, but most water most will burn off as steam in
the first 2 minutes.
“So why is all this important to know?”
To protect the sensor element tip and reduce the likelihood of thermal shock from
water, We need to ensure that the sensor only activates the internal heating element
AFTER THE ENGINE HAS STARTED.
So, that means
it is essential to wire your Spartan wideband controller so that it only provides direct power to the
oxygen sensor heater: after the engine has started running.
P.S
This water vapor that normally accumulates inside all exhaust systems helps explain why old exhausts
rust from the inside out… Hmm, the more you know!
Following information is directly credited from “Bosch” (Oxygen Sensor Manufacturer)
:
“In the warm
-up phase at engine start, the sensor is operated with reduced heater power... The heater power must only be
increased when the presence of condensed water in the exhaust gas system can be ruled out. The sensor’s ceramic element is
heated up quickly after heater start-up. Prior to heating the ceramic element, it must be guaranteed that there is no condensed
water present. This could damage the hot ceramic element. Never switch on sensor heating or the control unit before engine start.
The sensor installation location design must be selected in a way to minimize, or eliminate, condensed water on the exhaust gas side
from contacting the sensor. If this is not possible by design measures, the start of the sensor heater must be delayed until
demonstrably no more condensation water appears.”
Gauge Mode Configuration
There are 3x different display modes available for the 52mm AFR/ Lambda Edge series gauges
•
AF1
-
Petrol 10-20AFR:
This display mode will show AFR display range appropriate for a petrol powered vehicle. The
numeric readout in the centre of the gauge displays AFR values to one decimal place, the
outside scale type readout as AFR.
•
AF2
-
Lambda 0.68-1.36:
This display mode will show Lambda display range appropriate for most fuel types. The numeric
(Non-Diesel)
readout in the centre of the gauge displays Lambda values to two decimal places, the
outside scale numbers are disabled, however the outer scale sweep still shows.
•
AF3
-
Diesel Only 10-40AFR:
This display mode will show AFR display range appropriate for a Diesel powered vehicles while
under load/ in the power band. AFR’s above 40AFR to be expected during cruise conditions.
The numeric readout in the centre of the gauge displays AFR values to one decimal place,
the outside scale number are disabled, however the outer scale sweep still shows.
