UltraGauge EM plus - Bat Low Threshold; Power off Retries; KWP;9141 Optimize

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Page 47/63 UltraGauge™ EM User Manual www.ultra-gauge.com
Bat Low Threshold
MENU  UltraGauge Setup..  Compatibility..  Bat Low Threshold
This setting is used in conjunction with “Power off Detect” mode 5. This setting is ignored for modes other than mode 5.
When the engine is running the battery voltage is increased by the alternator. When the engine is not running, the measured
voltage is just the battery and is lower. By default the Battery Low Threshold is 12.85 volts. If UltraGauge detects that the
voltage is less than the “Battery Low Threshold” for “Power off retries” times, UltraGauge will enter its low power mode
and its display will be turned off. For example, if “power off retries” is set to 5 and the “Battery Low Threshold” is set to
12.85V, UltraGauge will enter its low power mode when a voltage less than 12.85 is sampled 5 consecutive times.
If, while in mode 5 with the engine off, UltraGauge fails to enter low power mode, increase the threshold until UltraGauge
consistently enters low power mode. If, while configured to mode 5, UltraGauge enters low power mode while the engine is
running, decrease the Bat Low Threshold and/or increase the “Power off retries”.
Note: Opening the door while exiting the vehicle, such that the cabin lights come on is enough to cause a significant drop in
battery voltage. So even if the gauge does not immediately power off, the cabin lights alone will cause a voltage drop and
cause UG to power down. So avoid setting the threshold too high.
Power off retries
MENU  UltraGauge Setup ..  Compatibility ..  Pwr off retries
By default UltraGauge will power-down if the “Power off Detect” mode is satisfied for “power off retires” consecutive times.
This setting allows the number of “Power off Detect” mode attempts to be set from 2-255. Normally a value of 10 is best
and preferred. If UltraGauge at times enters low power mode and briefly (5-12 seconds) turns off the display while the engine
is running, increase the number of retries until the behavior stops. Alternatively consider Power off detect modes 3 or 5.
A side effect of increasing the value is that UltraGauge will remain on for a longer period of time after the ignition is switched
to Off. However, the increase is minimal.
Changing this setting to a value greater than ~45 is not recommended for vehicles with KWP 2000 or 9141 protocols while
configured to “power off” detect modes 0,1,2, &4. Any value is okay for “Power off detect” modes 3 or 5.
KWP/9141 Optimize
MENU  UltraGauge Setup ..  Compatibility ..  KWP/9141 Optimize
The 9141 and KWP2000 protocols are very inefficient. The more engine specific gauges displayed on a page, the slower the
page will update. This can be witnessed by watching the health indicator beat rate. For all other protocols, the health
indicator beats about once each second. With 9141 and KWP 2000 the update rate can be as long as 2.2 seconds.
With this setting, the update rate for some 9141/KWP vehicles may be improved. By default the value of this setting is 100,
which corresponds to the most compatible setting. As this value is reduced KWP/9141 performance and the display refresh
rate increase. Some vehicles function without issue with a setting of 1, while others require the slowest setting of 100.
When this menu item is selected, the KWP/9141 Optimizer starts. The Optimizer will determine the optimal setting for the
particular vehicle. When complete the optimal value is displayed. The value can be accepted by pressing “MENU”, or it can be
manually overridden by entering a new value using the UP/DOWN keys. A value less than the Optimizer value should never be
manually entered.
It is recommended to run the optimizer a few times, and then use the resulting largest value.
For some vehicles manually setting the value too low will actually result in potentially anomalous behavior, such as:
 Slower update rate
 “Err” seen occasionally for various gauge values.
 “Comm Lost, restarting” message during initial gauge discovery
This is an optional setting and should only be used if you are dissatisfied with the update rate
NOTE: The ignition must remain in the RUN position. The engine should be off.
NOTE: This setting is applicable to ONLY vehicles with the 9141 or KWP 2000 Protocol; it has no affect upon other protocols.
NOTE: As an alternative, the update rate can also be increased by reducing the number of “engine specific” gauges on any
given page. Setting the “Power off Detect” mode to a value other than 0, may also increase KWP/9141 performance.
NOTE: If UltraGauge is moved to another KWP/9141 vehicle, it will be necessary to run the optimizer on the new vehicle. It is
advisable that the value be set to 100 prior to moving UltraGauge to the new KWP/9141 vehicle.
NOTE: If manually setting this value results in UltraGauge not functioning, follow this procedure to restore UltraGauge
 Unplug UltraGauge
 Press and hold the Menu Key
 Plug in UltraGauge, wait 5 seconds and then release the MENU key.
 The menu to appear.
 Return to the update rate and set it back to a known good value.