FAQ: How can I dim my SCX gauges?

Search:

Comp II LED Comp II SCX Black SCX Silver SCX White 60s Muscle MINI Factory Match Liquid Filled Non-Filled Direct Mount Engine Thermometers Accessories All Gauges

1" Dial (K) 1½" Dial (A) 2¼" Dial (B) 3" Dial (E) 3" Asphalt (E) 3" Bottom Mount (J) 3" Asphalt (J) 3" Adjustable (ADJ3) 5" Dial (G) 5" Adjustable (ADJ5) 5" Bottom Mount (GJ) Engine Thermometers Capillary Industrial All Thermometers

Utility, Lower Mount SS/Brass, Lower Mount SS/Brass, Center Back SS/Brass, U-Clamp SS/Brass, Panel Mount All SS, Lower Mount All SS, Panel Mount 4" All SS 4.5" Process Gauges

2" All SS (Q3) 2½" All SS (K) 2½" SS/Brass (J) 4" All SS (G) 4½" Process (MPB/SC) 6" All SS (H) All McDaniel Gauges

General Service Severe Service 63mm Severe Service 100mm Diaphragm Gauges Process Gauges All MARSH Gauges MARSH PDF Catalog

Address, Phone, Fax Request Info

The SCX gauges feature integrated LED lighting and will not dim as desired when connected to a standard OEM dash dimmer.

To dim your SCX gauges we recommend installing one of our compact LED dimmer modules.

Alternate Option 1: Dimming Gauges With A Resistor
You can also dim the gauges by installing a resistor inline with the 12V ACC supply to each SCX gauge (not inline with the light connection). Installing the resistor lowers the voltage supply to the gauge which reduces the brightness of the lighting. A 0.5W 100 ohm resistor for each gauge works well however you can vary the resistance to your desired brightness.

If you dim the lighting using a resistor:

Make sure the 12V+ "Always On" connection to the SCX gauge is connected (see instructions). This connection must get a steady 12V supply.
Make sure you connect the resistor inline with the 12V ACC power to the gauge, NOT the lighting.
If your resistor value is too high, the gauge may not get enough power to operate correctly. If this happens, lower the ohm value of the resistor.

Alternate Option 2: Dimming Gauges With a Potentiometer
For adjustable levels of dimming, you can install a potentiometer to reduce the voltage supply to each gauge (which will dim the lighting). For 1-3 gauges we recommend a 5W 250 ohm potentiometer (Digikey Part CT3018-ND). For 4+ gauges we recommend a 5W 100 ohm potentiometer (Digikey Part 026T419S101A1A1-ND).

If you dim the lighting using a potentiometer:

Make sure the 12V+ "Always On" connection to the SCX gauge is connected (see instructions). This connection must get a steady 12V supply.
Make sure you connect the potentiometer output inline with the 12V ACC power to each gauges, NOT the lighting.
If your resistance value is too high, the gauge may not get enough power. If this happens, reduce the resistance.

Back to FAQs

About Us · Search Catalog · FAQs · Contact · Site Map · Home

info@marshallinstruments.com
1-714-632-8565


Auto Gauges	Thermometers	McDaniel	Marsh
Comp II LED Comp II SCX SCX Sport 60's Muscle MINI Cooper 1.5" Mechanical Accessories	1" Dial (K) 1½" Dial (A) 2¼" Dial (B) 3" Dial (E) 3" Asphalt (E) 3" Bottom Mount (J) 3" Asphalt (J) 3" Adjustable (ADJ3) 5" Dial (G) 5" Adjustable (ADJ5) 5" Bottom Mount (GJ) Engine Thermometers Capillary Industrial Bimetal Needle Valves Needle Valves	2" All SS (Q3) 2½" All SS (K) 2½" SS/Brass (J) 4" All SS (G) 4½" Process (MPB/SC) 6" All SS (H) All McDaniel Gauges PDF Catalogs All Stainless General Service Fillable All SS Utility Process Gauges Filled SS/Brass Utility (J6, T6) SS/Brass Utility (R7, T7, J7) Steel Case Utility (R8, T8, J8)	General Service Liquid Filled, 63mm Diaphragm Gauge (G) Process Gauge (P) Quality Gauge (H) Inspector Test (D) Test Gauge (D) All MARSH Gauges PDF Catalogs MARSH Product Catalog