Tesla TI4676 - Manual (Page 30)

Chapter 7
Push To Test Modification
General Information And Operation
7-1. General
THIS MODIFICATION HAS BECOME STANDARD EQUIPMENT FOR EACH OF OUR
UNITS. BOTH MILITARY AND CIVILIAN CLIENTS HAVE FOUND THIS MODIFICATION
TO BE CRITICAL TO THEIR OPERATION. THE PUSH TO TEST BUTTON IS USED TO
INDICATE THE CAPACITY OF THE POWER CELLS WITHOUT APPLYING AC INPUT
POWER. IT ALLOWS THE END USER TO CHECK THE STATUS OF THE POWER CELLS.
THIS LETS THE OPERATOR KNOW IF THERE IS ENOUGH POWER TO PERFORM ANOTHER
ENGINE START, OR IF THE UNIT HAS TO BE RETURNED TO AC POWER TO ALLOW IT
TO RECHARGE.
7-2. OPERATION
1)IF UNIT WAS PLUGGED IN MAKE SURE THAT YOU WAIT AT LEAST 2 MINUTES AF-
TER AC POWER IS REMOVED, OR DC POWER IS EXTRACTED FROM THE UNIT, BEFORE
YOU DEPRESS THE PUSH TO TEST BUTTON. THIS WILL ENSURE A CORRECT READ-
ING.
2) WITHOUT AC POWER INPUT OR DC POWER OUTPUT, SIMPLY DEPRESS THE PUSH TO
TEST BUTTON ON THE FACE PLATE AND HOLD FOR APPROXIMATELY 10-15 SECONDS.
3) AT THIS TIME THE LED BAR GRAPH SHOULD LIGHT UP INDICATING THE STATUS
OF THE POWER CELLS.
4) THE FAN SHOULD ALSO OPERATE AT THIS TIME. IF YOU DO NOT HEAR THE FAN
RUNNING, STOP DEPRESSING THE BUTTON AND CHECK FOR ANY OBSTRUCTIONS TO
THE FAN.
5) NEVER DEPRESS THE PUSH TO TEST BUTTON WHILE THE UNIT IS PLUGGED INTO
AC POWER FOR RECHARGE. IF UNIT IS PLUGGED INTO THE AIRCRAFT MAKE CERTAIN
THERE IS NO LOAD APPLIED TO THE DC SYSTEM WHILE USING THE PUSH TO TEST
BUTTON, OTHERWISE A FALSE READING WILL OCCUR.
6. NEVER DEPRESS THE PUSH TO TEST BUTTON FOR MORE THAN 30 SECONDS. THIS
MAY CAUSE A TEMPERATURE SENSOR TO TEMPORARILY DISRUPT PUSH TO TEST FUNC-
TION. (IF THIS SENSOR IS TRIPPED, ALLOW FIVE MINUTES FOR UNIT TO COOL
BEFORE OPERATING PUSH TO TEST BUTTON.)
7-1
100
90
80
70
60
50
40
30
<20
Capacity %
PUSH TO TEST BUTTON/
CHARGE INDICATOR