Instruction manual

120-00004 REV A 10/6/2011 4000 DIGITAL MANUAL PAGE 16
indication difficult. It is recommended that the batteries be
recharged if the reading in BATTERY TEST “A” is at 100 (ignoring
the decimal place). Allowing the reading to drop below 100 is not
recommended. Note: NiCd batteries can develop cell
memory. Cell memory is caused by running the analyzer on
battery power for a short period of time REPEATEDLY i.e:
Running the analyzer for 20 minutes and then recharge. If
this occurs repeatedly, the NiCd battery life will only retain a
20 minute charge memory.
The charger is an external 9V DC, 100mA transformer and is
connected to the rear of the unit prior to charging. The tip is
positive and the ring ground. The FUNCTION switch should be
set to OFF or ZERO when charging. The recommended charge
time is 16 hours.
4.2 Water loss in Refillable sensors.
(fig. 7)
All sensors provided with a fill port require that the electrolyte
matrix is maintained in a near-saturated condition in order to
provide optimum performance. This is achieved by injecting