Troubleshooting; Care And Cleaning; Before You Call For Service - Cardinal 758 Operation Manual

The 758 has been designed to provide you with years of trouble-free operation. In spite of this,
troubles sometimes happen. Before calling for service assistance you should make some initial
checks to verify that a problem does exist. The following describes several types of symptoms
along with suggested remedies.
Problem
Display does not turn on
Incorrect weight displayed
Indicator will not display
weight
1. DO NOT submerge indicator in water, pour or spray water directly on instrument.
2. DO NOT use acetone, thinner or other volatile solvents for cleaning.
3. DO NOT expose equipment to temperature extremes.
4. DO NOT place equipment in front of heating/cooling vents.
5. DO clean the indicator with a damp soft cloth and mild non-abrasive detergent.
6. DO remove power before cleaning with a damp cloth.
7. DO provide clean AC power and adequate protection against lightning damage.
8. DO keep the surroundings clear to provide clean and adequate air circulation.

BEFORE YOU CALL FOR SERVICE

CARE AND CLEANING

Possible Solutions
Batteries discharged - replace if Alkaline or recharge if
NI-CAD or NiMH. Batteries not installed or not installed
correctly. Is DC power supply cable plugged into 758? Is
AC power adapter plugged into wall receptacle? Check
wall receptacle for proper AC power. Try another
electrical appliance in the same receptacle, does it
work? Check the circuit breaker. Has there been a
power failure of any kind?
Has the instrument been calibrated? Insure that the
scale platform isn't touching an adjacent object. Check
the load cell connector wiring. If using four (4) wire load
cells, insure the sense lead jumpers (J2 & J3) are
installed. Have proper operation procedures been
followed?
Refer to Error and Status Display section and make
certain that the O CAP O CAP message is displayed. If so, and
scale is not loaded, perform the calibration sequence.
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