SKC Limited EPAM-5000 - Manual (Page 75)

If Instrument Does Not Respond
Introduction Check the following items if the EPAM-5000 Monitor’s LCD display is
incomplete, or the display and keypad are “locked up”.
Step Action
1 If the LCD display turns on, check the battery’s voltage. (Chapter 5
Section 5-8) A depleted battery will show a charge level of 5.95
VDC or lower. Replace the depleted battery with a fully charged
battery (Chapter 5 Section 10) or attach the appropriate power
transformer (Chapter 5 Section 9) to the EPAM-5000 Monitor.
2 If the LCD display does not appear, remove the battery (Chapter 5
Section 10) and check the voltage across positive pin and case
ground using a digital voltmeter. The battery should be recharged
(either inside or outside of the monitor) if it shows a charge level of
5.95 VDC or lower. Led battery indicator light should turn from red
to green when battery is fully charged or after approximately 15
hours of charging. If the battery voltage is higher than 5.95 VDC,
check the continuity of the 2-amp fuse in the battery pack at location
F1. If the fuse is blown, replace it with a new 2-amp replacement
fuse. If you do not purchase your replacement fuse from EDC, be
sure to replace this fuse with an identically rated component to avoid
damaging the monitor.
3 If the unit is “locked up” and the buttons on the keypad are non-
functional remove the battery (Chapter 5 Section 10). Other
symptoms of instrument lock up includes: Letters scrolling across the
bottom of the display or non-sensible lettering, display “locked up”
on preparing compensation or two lines across display. First remove
the battery and charge as stated in step 2. Then replace the battery
and check battery status, if it does not appear, it may be necessary to
reset the instrument. A reset switch is located inside the instrument
(NOTE: only use press the reset button as a last resort, all logged
data can be lost). Lift the sensor cover, inside of the instrument is a
push switch located on the PCB (see figure 6-2). Press reset switch
for one second and release. If unit resets it self check battery status
and date and time. If not, then press the switch and hold down as the
pump and solenoid purges. (This should take 30 seconds to 1
minute). Once purge is complete the switch can be released, remove
battery. Replace battery and check battery status (see chapter 5
section 8). If battery status does not appear repeat procedure. After
battery status appears it is necessary to reset date and time (see
Chapter 2 section 4) for the instrument to work. Note: Always
choose over write when beginning a sampling session.
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