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The following is a list of commonly asked questions regarding
this product. If you have any additional questions,
please feel free to contact us at 800-426-1306 for further
information. |
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| My Model 2200 failes to recharge even though it has been plugged in overnight. What should I do? |
| Try pressing the reset switch on the back of the unit before and after charging.
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| The battery is dead. How do I recharge it? |
| There are two batteries in the Model 2200: a 9V NiMH and a 12V Lead Acid Battery; they are both recharged by plugging the provided power supply into the unit and connecting to a power source overnight.
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| The
battery no longer holds a charge like it used to.
Can I replace the batteries myself? |
| Replacement batteries can be purchased from A-M Systems by clicking on this link to the accessories page.
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| My battery has died. Can I temporarily run the unit with my power charger? |
| No. When the Power Switch is set to CHARGE, the unit's output is disconnected.
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| My Model 2200 seems to produce a DC offset when placed in current mode. How can I eliminate this offset? |
| The Model 2200 always produces a small offset in current modes (0.02% of full-scale plus 1nA). But this current can be zeroed for the specific range by using the front panel offset adjust. To remove the offset properly,
hook a 1.0 or 10M resistor across the output prior to beginning your
experiment. Set the range to the range you will use in your
experiment. Set your signal source to 0V. Please note that the
source of the offset is often the signal source, and not the Model
2200. Look at the voltage across the resistor on a multimeter or
oscilloscope. Adjust the front panel potentiometer so that the
output reads zero. You should now produce near zero current offset
during your experiment, when your signal source is zero.
Alternatively,
you can eliminate the offset by AC-coupling the output of the Model 2200
(provided you are trying to generate a biphasic waveform). There are
two concerns in using this method: the limited bandwidth and DC offsets in
general. Any DC offset, no matter how small, will charge the capacitor in
the AC-coupling circuit over time to the point where the output amplifier
saturates, and can no longer produce the requested output current.
For more information on AC-coupling the output of a Model 2200, please
contact our technical support team (tech@a-msystems.com).
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| My Model 2200 is beeping at me, indicating the battery is low, but the battery test light illuminates, indicating OK levels. How can this be? |
| The 9V battery
has discharged below acceptable levels, but it is still slightly strong
enough to partially light the led. It needs to be replaced.
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| Can
I get a replacement Instruction Manual for this instrument? |
| Additional
Operator's Manuals are available for download by clicking
on the 'Downloads' section from the menu bar at the
top of this web page, or in the menu column to the left.
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| My
Model 2200 is not working, but our university has an
excellent electronics facility. Can we repair the unit
ourselves? |
| It
is recommended that A-M Systems perform the needed repairs
as we are the most familiar with the units. However,
if you are confident in your electronic technician's
skills, you can always purchase the schematics for the
Model 2200 from us and attempt them yourself.
Please
note that any user-attempted repairs during the warranty
period may invalidate the warranty, and might invoke
additional charges to correct them if A-M Systems is
required to make repairs at a later date.
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| Can
I use this instrument outside of the United States? |
| All
of A-M Systems instruments can be modified to work outside
of the United States. Typically, this modification is
made at the factory (at no additional cost) prior to
shipping to our customers. Just inform the customer
service department where the instrument will be used,
so our technicians can prepare the proper power supply
modifications.
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| What
are the proper operating and storage conditions for
my Model 2200? |
| The
Model 2200 is designed to be used under laboratory conditions.
Operate in a clean, dry environment only. Do not operate
in a damp environment. Temperatures for storage and
operation should be between 5 ºC and 40 ºC. Storage
should be indoors in a cool dry place.
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