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
Contact Us About Marshall Search Catalog FAQs Site Index

What is the BATT (Always On) Connection For?

The BATT (Always On) connection is required for the SCX based stepper motor gauge pointer to return to 0 when the ignition is turned off.

If you do not connect the BATT gauge connection to the battery + (always on) connect it to your 12V ignition source so the 12V BATT connection has full 12V power when the ignition is ON.

Without 12V power to the BATT connection the stepper motor gauge pointer will stay at its last reading (i.e. 30 PSI, 200F, 800 RPM etc) when the ignition is turned off. This does not affect the gauge (other than the pointer not returning to 0). When the ignition is turned back on, the gauge will perform its self calibration cycle and operate normally.

Back to FAQs

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

©2022 Marshall Instruments, Inc.
Design: BWE, Inc.

  Auto Gauges Thermometers McDaniel Marsh