User Guide

DigiGauge Digital Pressure Gauge
Instruction Manual
Page 2
Reset
DIL Switch
SW1-SW4
Display Span
adjustment potentiometer
UP (SW7)
ENTER (SW6)
DOWN(SW5)
Push Buttons
Figure 1 - Internal view of switches, reset terminals and calibration potentiometer
Battery Replacement
The gauge is powered by two alkaline manganese 1.5 volt cells, type LR6 (AA). When these are due for replacement the display
will alternate between the pressure reading and message bAtt. This warning will be given when the battery voltage falls to 2.0
volts (1.0 volt per cell), at which point the battery has approximately one month of life remaining. An internal voltage regulator cir-
cuit maintains measurement accuracy until the battery voltage falls to approximately 1.5 volts. Always replace the cells in pairs,
do not mix old and new cells.
To replace the battery unscrew the front bezel ring and remove the window and sealing gasket. Remove the two nylon-headed
screws and lift off the dial. Remove the old cells and fit two "AA" size 1.5V alkaline manganese cells into the battery holder. The
correct polarity of the cells is shown in Figure 2 below and is also marked on the battery holder. (The instrument will not be dam-
aged if the cells are fitted incorrectly.) Refit the dial, place the sealing gasket on the front face of the case then centre the win-
dow on the gasket. Refit the bezel ring tightly with firm hand pressure.
Figure 2 - Correct battery polarity