Emerson MPR15 Series, MPR25 user manual Adjustment for the 50 a LVD unit Rel , 02A, 3 & 3A

66 Installation and start-up procedures

Procedure 16 - Low voltage disconnect adjustment

Step	Action
1	Set the NORMAL/BYPASS switch to the BYPASS position. The TEST
	LED should light up.
2	Connect a digital voltmeter at the test jacks located at the front/bottom
	of the LVD unit.
3	Turn the test potentiometer slowly counterclockwise and verify when
	the LVA LED lights up. It should light up at -47 +/- 0.5 V.
4	Continue to turn the test potentiometer counterclockwise until the LVD
	LED lights up. It should light at -43.5 +/-0.5 V.
5	Turn the test potentiometer clockwise. At -47 +/-0.5V the LVA LED
	should extinguish.
6	Continue to turn the test potentiometer clockwise. Between -50 and -
	50.5 V the LVD LED should extinguish.
7	If no adjustment is required, set the NORMAL/BYPASS switch to the
	NORMAL position. The TEST LED should extinguish. If any alarm level
	must be readjusted, follow the steps described below:
	–end–

Adjustment for the 50 A LVD unit Rel. 02, 02A, 3 & 3A

Procedure 17 - LVD 50 A adjustment for unit release 02, 02A, 3 and 3A

Step Action

1Set the NORMAL/BYPASS switch to the BYPASS position (if not already in the BYPASS position).

2Remove the LVD unit's faceplate by turning the fastener, located at the front/top of the unit, one quarter turn counterclockwise.

3Connect the digital voltmeter to the test jacks located at the front/bottom of the unit's PCB.

–end–

UM5C06B / C ( 169-2071-500 ) P0711722 Standard 10.00 May 2001