To reset a dm-2 without using the reset button, Screen contrast, To change the screen contrast – Retrotec DM-2 User Manual
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©Retrotec Inc. 2012
To reset a DM-2 without using the Reset button
1. Remove the back panel labeled "Battery Compartment".
2. Remove the batteries, and disconnect all other tubes or cords.
3. Wait five minutes.
4. Re-install the batteries.
1.4 Screen Contrast
Older model DM-2 gauges include the ability to change the screen contrast in order to improve
visibility in different light conditions. Newer models have the voltage to the screen regulated so the
contrast adjustment is not necessary.
To change the screen contrast
1. If required, insert a small Phillips head screwdriver into the hole on the back marked "LCD
Contrast".
2. Adjust the dial until the desired screen contrast is achieved.