MAINTENANCE 

Power Supply Voltage Check – HD149

Applicable Model(s):

Procedure

PowerSupplyCheckAll

1.Switch off power to the gauge.
2.Gain access to the HD149 power supply inside the gauge.
HD149-Power-Supply-Voltage-Check-1-2

3.Unplug the terminal strip to disconnect the power supply from the gauge electronics.
HD149-Power-Supply-Voltage-Check-1-3

4.Switch on the gauge power.
5.With a voltage meter set to measure DC voltage check each of the output voltages:

+5VDC
HD149PowerCheck_4

‐12VDC
HD149PowerCheck_5 +12VDC HD149PowerCheck_6

+24VDC
HD149PowerCheck_7

+24VDC
HD149PowerCheck_8

6. Switch off power to the gauge.
7. Reconnect the terminal strip to the power supply.