ADM-860C 04/14/08
59
APPENDIX C - BATTERY TEST PROCEDURE
Insufficient battery charge (entire set or individual cells) can cause the meter to display garbled messages or TOO
HOT, TOO COLD, RECHARGE or other messages. This garbled display usually is seen when the meter is just
turned on and the supply voltage drops so fast that the meter gets lost. The following tests should be performed
before you call the manufacturer or return the meter.
1.
Check the battery charger transformer. The output should be 24 to 30 volts AC. Be sure the charger is
plugged into a live outlet. The green LED on the front panel of the meter indicates when the battery charger
is powered.
2.
Does the meter function properly while the charger is attached and plugged-in? If so, a bad battery cell is
likely. Allow ten minutes for minimum charging to take effect before testing meter function.
3.
Place the meter face down with the air connectors turned away from you. Remove the battery compartment
cover by unscrewing the eight small phillips head screws. Check the battery clips. Remove the batteries
and re-spring the clips to provide proper contact pressure with the ends of the batteries.
Be sure to reinstall the batteries in the proper orientation as shown in the compartment. Turn the meter on
to see if the problem display still exists. If the problem persists, test the positive (+) and negative (-)
charging circuits as follows:
a.
Measure the DC voltage of the upper half [po) six cells] of the battery set by placing your DC
voltmeter common (ground) probe at the left center battery clip and the other probe at the upper right
corner battery clip. The voltage should be between 7.2 volts and 8.5 volts DC.
This voltage should rise when the charger is plugged in and should fall when the charger is
unplugged.
b.
If the voltage does not rise and fall with the changes in charger input, then the charging circuit in the
meter is not working and the meter must be returned to the factory for repair.
c.
Test the lower half [negative (-) six cells] of the battery set in the same manner described above by
placing the voltmeter probes at the left center battery clips and at the lower right corner battery clip.
4.
Check each battery cell voltage with the charger unplugged and with the meter turned on (if it will stay
turned on).
Each cell should have a voltage of 1.1 to 1.3 volts. If you find one or two very low cells, they may be weak
cells and may need to be replaced. If most of the cells are less than 1.1 volts, it is possible that all are near
the end of the discharge cycle and just need to be recharged.
5.
Replace weak or low capacity battery cells with rechargeable cells of the
same
capacity (mAh) as the
existing cells. If the same capacity cells are not available, replace all 12 cells with new batteries. See the
Instruction Manual Section 15.0 METER MAINTENANCE.
6.
If the problem is not corrected through these procedures, please return the meter to our factory for repair
and calibration services.
Shortridge Instruments, Inc.
7855 E. Redfield Road
Attn: Recalibration Department
Scottsdale, Arizona, USA 85260
Phone: (480) 991-6744 Fax: (480) 443-1267
www.shortridge.com
Summary of Contents for ADM-860C
Page 38: ...ADM 860C 04 14 08 33 FIGURE 6 3 VELGRID ASSEMBLY...
Page 47: ...ADM 860C 04 14 08 42 FIGURE 10 1 FRAME STORAGE FIGURE 10 2 FLOWHOOD IN CASE...
Page 48: ...ADM 860C 04 14 08 43 FIGURE 10 3 FLOWHOOD ASSEMBLY...
Page 50: ...ADM 860C 04 14 08 45 FIGURE 10 7 1X5 FRAME ASSEMBLY FIGURE 10 8 3X3 FRAME ASSEMBLY...
