Hi
Just acquired a CSI 2115 and 2120 from one of our plants that is closing. What is the adapter voltage required? Received 3 adaptors with the units, 12v 9v and 7.5v.

Probably can't use them as there was no software supplied, but I would like to power them up and make sure they work.

Thanks

My charger is putting out 15.28 vdc and is nominal 15 vdc.

My 2120 manual says 7.2V NiCad battery pack.

Walt

NiCAD batters chargers usually have voltage outputs substantially greater than the battery pack voltage ratings.

I opened the case on each unit, the 2115 has a 12v battery pack, the 2120 has a 7.2v battery pack as Walt indicated.

Neither system powered up when a power adapter/charger was plugged in.

Should they run directly off the charger or does the battery have to be charged up?

Is there a key sequence for resetting the unit?

Thanks again

REJ,

I might be interested in buying the 2120 if you decide to get rid of it.

Back to some of your questions:

There is a key sequence to reload the firmware, if you have the floppy or cd that has the correct serial numbered for the meters, otherwise it is not wise to reset and remove the firmware.

As far as the batteries go, I would try taking them out completely, I can't remember how the 2115 is connected, probably by a "plug" but the 2120 has pins touching the battery brass plates. I would clean the pins in the meter and the 3 brass connectors on the battery and give that a try.

Our 2120 failed to start this morning and that is what we did to get it back up and running. May not work on yours, no telling how long they have been discharged.

I'll give those ideas a try.

We didn't get any software with the units.

There is a pretty good chance they will be for sale. Without the software, they are going to be useless here.

REJ,

You can contact our main office, Alert Analytical at:

715-893-5035, ask for Mark Lauren or

Email: Alert@centurytel.net

Attention: Mark Lauren

This information I have compiled from various CSI tech notes over the years. There is also some good info on the differences in output voltages, and the different photo tach applications.

CSI Analyzer Batteries:

28 Volt Batteries:

The models 2110, 2100 and 2115 analyzers all have the same type of battery. That is, they have 2 banks of 10 cells each. The batteries for each model are different in physical size because of different capacities needed, but the layout and voltage is still the same.

Each cell is 1.4V, so that is 14 volts per bank or 28V per battery. When the battery is charged it is charged with 28Volts.

The analog circuits for these analyzers need +14 and -14 volts, not 28 volts. The two banks within the battery are treated as separate batteries, reversing the leads on one bank. This gives the 14 volts from one bank and -14 volts from the other bank.

The 2110 and 2100 analyzers use the +14 volt bank only. This is what gives you the reading when you check the battery. It was determined later, before development of the 2115, that if a problem developed in the negative bank of cells the customer did not know because the meter just referenced the positive bank of cells.

With this in consideration the 2115 was designed to read and display both banks of cells. This is why there are 2 battery readings on the 2115.

7.2 Volt batteries:

The models 1900 and 2120 have single battery structures, thus one reading on those models.

The 2120, 2117 and the 8117 contain a 7.2 volt nickel cadmium battery with 8 hrs. min. of continuous use. The 8000, 2115, 2110 analyzers contain a 24 volt nickel cadmium battery with 10 hrs. min. of continuous use. Refer to tech note 96-00385 for more information on this battery.

The integrated circuit piezoelectric (ICP) power supply inside the analyzers powers sensors such as accelerometers. The power supply provides 2 milliamperes constant current at 20 volts nominal. Depending on the type of input selected, the constant current power supply can be used or bypassed by the adapter used and by turning sensor power off in the analyzer and changing to the volts side of the adapter.

Tach output voltages:

The output voltage of the model 8000, 2115 and 2110 analyzers is 12 volts. The 404B phototach was originally designed to work with these meters.

The output voltage of the 2120, 2117, and 8117 analyzers is 7.5 to 8 volts. The 404P (with the power supply was specifically designed to work with these meters however the newly designed 404b will also interface with all metrs mentioned. The part number is still the same as the older generation model. It should be noted that an older 404b may experience problems with a "tach unstable" message interfacing with the 2120, 2117, and 8117 analyzers.

Rick, actually the 2115 has 10 cells of 1.2V making the battery +/-12 with a 24V charger with 60 and 120mA charging rates. The open circuit voltage on the charger is 30V. Byron