Stack ST500 User Manual

ST500 Tach-Timer Maintenance
© Stack Limited
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Display is dead
There is no backlight. Nothing appears on the display. The blue dial
lights are on but appear dim. The ‘Battery low’ warning may appear
on the display.
• Battery is almost dead
Recharge or renew battery
• Power connection to B+ or B– is faulty
Check power lead continuity
Display flashes and dial pointer resets or vibrates
• Battery is almost dead
Recharge or renew the battery
• Power connection to B+ or B– is faulty
Check power lead continuity
Display and dial show fixed high values
• Driver button (peaks) faulty
Renew the Driver button
Disconnect the Driver button. If values return to normal, renew the
button.
• Faulty switch wiring
Check the switch wiring

Stack ST500 Specifications

General

Brand	Stack
Model	ST500
Category	Measuring Instruments
Language	English