Replacement Instructions; Battery Replacement; Lamp Replacement - Hach DR/2010 Instrument Manual

5.2

Replacement Instructions

5.2.1 Battery Replacement

5.2.2 Lamp Replacement

To prevent static electricity damage to the instrument, always turn the
instrument off and disconnect all the cables (RS232 and power) from the
instrument before removing the battery and lamp covers.
When a
LOW BATTERY
alkaline, D-cell batteries (or recharge the battery if using the optional
rechargeable, lead-acid battery). Make sure that the instrument is turned
off and all power to the instrument is disconnected. If D-size alkaline cells
are used, replace all six batteries (refer to section 4.1 Battery Installation).
If a rechargeable battery is installed, recharge as soon as possible.
If the lamp fails and must be replaced, proceed as follows.
1. Disconnect the Battery Eliminator and the RS 232 connector. Turn off
the power switch and empty the cell holder. Place the instrument
upside down on a padded surface.
2. Remove the two screws securing the lamp compartment cover and
remove the cover (see Figure 21, Lamp Replacement).
3. Remove the lamp retainer screw and metal sleeve from the lamp
channel. The sleeve is tapered at the bottom end, and, because of its
snug fit, probably needs to be loosened with a tool (needle-nose pliers
recommended) for removal. Remove the lamp. Loosen the two
terminal screws to free the lamp leads.
4. Place the new lamp in the lamp channel with the V-shaped lamp light
slit toward the light slit in the lamp channel. The square-shaped slot
should face the side with the wavelength dial. Push the lamp to the
bottom of the lamp channel and install. Firmly tighten the lamp
retainer screw and sleeve in the channel to secure the lamp. Secure the
sleeve with the beveled end down. The lamp must be held tightly in
the proper position, flush against the bottom, the end, and the light slit
side of the lamp channel (see Figure 21). Connect the lamp leads of
the new lamp assembly at the lamp terminals (lead orientation does
not matter). Do not overtighten.
5. Install the lamp compartment cover. Return the instrument to the
upright position and restore power.
Note: Some internal components are sensitive to static and may be damaged
by external static electricity. Always re-install the lamp cover after maintenance
or servicing.
message appears in the display, replace the
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