Hf-scientific DRT-15CE Portable Turbidimeter Bedienungsanleitung PDF herunterladen (Seite 18)

DRT-15CE (5/10) Page 10

Symptom

No display on instrument at all.

Possible Cause

1. Battery is dead. Recharge battery.

2. Fuse has blown. Check battery connections and replace fuse with 1A

fast acting 5x 20 mm.

Symptom

Low battery indicator on after 8 hour charge.

Possible Cause

1. Battery is defective. Replace battery.

2. Charger is defective or is not connected to a valid power source. Check

for "~" indication on display.

9.0 MAINTENANCE

TheDRT-15CEisnotdesignedforeldservicing.Itshouldbereturned

toyourlocaldistributorortoHFscienticforanyservicerequirements.

Besuretoobtainareturnauthorizationnumberpriortoreturn.Thiswill

facilitate prompt servicing of the unit. The excep tions are Battery and Lamp

Assemblyreplacement.Thiscanbedoneintheeldprovidedthenew

battery is installed in the same manner as the battery being replaced.

9.1 BATTERY REPLACEMENT

Should the battery (HF catalog #70008) fail, it can be user replaced. Make

certain the instrument is turned off. Remove all the accessories in the foam

holder.Next,removethefoaminsertbyplacingangerinthecuvettehole

andpullingtherearofthefoamforward,thenup.ThevePhillipshead

chassis screws should be removed. Remove the chassis from the case by

sliding the chassis all the way to the right then pulling up. The two screws

under the right side of the chassis need to be removed now. This will allow

for the removal of the battery clamp and the old battery. Replace the battery

by reversing the procedures described above. When connecting the battery,

be certain that you connect the red wire to the terminal marked (+) and

the black wire to the terminal marked (-). If these wires are inadvertently

reversed the fuse will blow and must be replaced (see Figure 2).

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Hf-scientific DRT-15CE Portable Turbidimeter Bedienungsanleitung Seite 18