2.9.2 Battery Replacement
The Mode! 395 contains an internal batteryfor the unit's internal memory. Its replacement
should only be carried out by a suitably qualified technician. Measure the battery voltage
when performing calibration
of
the unit (approximately every 12 months); refer to
paragraph 4.3,
figure
4-7 and table 4-6 item
6.
The battery should measure between +3.2
Vdc and +2.7 Vdc. Replace the battery when
it
measures +2.7 Vdc
or
below to avoid
loosing Arb waveforms, stored settings, "last setup," and all remote setup parameters.
WARNING
This instrument uses an internaI battery containing more than 0.2
grams
of
Lithium. Do not charge or short this battery. A hazard
of
explosion and
or
contamination exists.
CAUTION
Always replace the battery with one
of
the same type: Panasonic BR-
2/3A
To
replace the battery. This task should only be undertaken by a suitably qualified
technician.
1.
Turn offthe Power and disconnect the power cable.
2.
Remove the two screws; one on each side
of
the coyer.
3. Slide the coyer back.
4. Remove the battery.
5. Remember, removing the battery
willloose
Arb waveforms, stored settings,
"last setup," and aIl remote setup parameters.
6. InstaIl the new battery.
Be
sure to match the polarity
on
the battery with the
polarity indicator on the battery holder.
2.10 RACK MOUNTING EARS
The Model 395 can be rack mounted using the optional mounting ears (Option 004).
Installation instructions are in appendix D
of
this manual.
2.11 REMOTE SETUP
2.11.1 RS-232
To connect the Model395
to
a computer via RS-232, use the provided RS-232 cable. For
information on RS-232 remote programming, refer to section 5
of
this manual. Note that
the 0 V connection on the
RS-232
connector is internaIly connected to the floating
analog common and not ground.
RS-232
Connector
"'"
RS-232
o
(Ç;oo
00000°)0
CAL
EN
ABLE
Cal Sticker
Figure 2-5. RS-232-C Connector
Initial Preparation 2-7
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