Calibration
The “Reference Output” signal from the BSLSTM must be calibrated to ensure accurate
results.
1. Choose the correct Preset (via MP3X menu > Set Up Data Acquisition >
Channels).
▪For example, if using the BSLSTMA/B, (this Preset found in older BSL
3.7.x software only) don’t choose a “BSLSTM...” Preset.
▪Also, make sure the Preset matches the Voltage Range that will be used (0-
10 V, or 0-100 V).
2. With stimulator connected and ON, turn the Level control counter-clockwise
until the display reads 0 (or as close to 0 as possible).
3. Get into the Scaling window for the Reference Output channel (via MP3X menu
> Set Up Data Acquisition > Channels > > ).
4. Press the Cal 2 button to obtain the signal representing 0 V out of the stimulator.
5. Add the Input value found in Cal 2 to the Input Value displayed for Cal 1.
▪For example, if “Cal 2” is pressed and provides an Input Value of .255 V,
add the number .255 V to the existing 50 V and manually enter the total
value of 50.255 V for Cal 1 Input Value.
▪Note: Even if the Cal 2 Input Value is negative, it must still be “added” to the
number for Cal 1 (which essentially subtracts it) to arrive at the proper value.
6. Click OK to close out of the Scaling window and then close out of the Setup
Channel window. The system is now ready to record.
7. Optional: Save the setup as a Graph Template to save these new scale settings.
As long as neither the MP3X nor stimulator changes, the calibration should not
need to be repeated.
NOTE: In earlier versions of BSL software (3.7.x) the Cal 1 and Cal 2 fields
are reversed in the Scaling dialog. To calibrate using this older
software, reverse the above instructions for Cal 1 and Cal 2.
