SD Write Time (Scientific Model Only):
Touching the ENTER button when on the
Eject SD Card
screen will ask
the user the time desired in between data being saved to the microSD card. Touch SELECT will change the time
between saves, or touch ENTER to continue to the next screen. After 10 seconds of inactivity, the LCD will return to
the
Home
screen.
If a properly formatted microSD card with enough space is inserted, the Metiri™-S will automatically save recorded
data in a CVS file at time intervals set by this screen. The value chosen is written to non-volitile memory and choices
range from 125 milliseconds to 4 minutes between saves.
NOTE: Setting the SD Write Time to 125mSec can result in very large data files as each data entry is 64 bytes.
Positive Current/Voltage-B Calibration:
Toucing the ENTER button when on the
Reset All Values
(or
SD Write
Time
for Metiri-S) screen will prompt the user to begin the
Positive Current/Voltage-B Calibration
program.
Connect a DC voltage or current through Metiri™ as instructed on the LCD and touch SELECT to confirm for each step,
or touch ENTER to cancel. The initial screen will return to the
Home
screen after 10 seconds of inactivity. Once
calibration has begin, the screen will stay until calibration is complete or until the ENTER button is pressed to cancel
calibration.
STEP 1: Connect the Auxillary USB power for calibration. Connect a calibrated power source to the SOURCE wire
side and a load to the LOAD wire side capable of 9.0 Amperes and 12 volts.
STEP 2: Touch the ENTER button until you see the Positive Current/Voltage-B Calibration screen shown below. If the
negative current calibration is desired, touch ENTER once more and instructions for Negative Current/Voltage-A
Calibration will show.
STEP 3: C12 volts to the SOURCE wires, make sure there is no current flowing through Metiri, and touch
SELECT to save the Voltage-B and zero current OFFSET Value.
NOTE
: no voltage is needed beyond this point, only
current.
STEP 4: Increase the current so that exactly 4.0 Amperes is flowing through the Metiri Smart Energy Meter. Touch
SELECT to save this value.
STEP 5: Increase the current so that exactly 9.0 Amperes is flowing through the Metiri Smart Energy Meter. Touch
SELECT to save this value. Touching SELECT at this point will save all calibration values. If a mistake is made,
simply touch ENTER to delete the saved values and try again.
STEP 6: Calibration is complete. The calibration results will be printed on the second line of the LCD and will be
saved to non-volitile memory. The values printed represent the current detected in 100mA values starting with the
zero current OFFSET, then the 9A reading, and finally the 4A reading. These values are for reference only and do
not need to be remembered.
In order to ensure proper current and voltage measurement, both the positive current and negative calibration should
be done togeather. It is very important that calibration be done with a low noise power supply and load. Remember
that the ENTER button can be touched to cancel the calibration routine anytime before STEP 6 is reached.
Negative Current/Voltage-A Calibration:
Toucing the ENTER button when on the
Positive Current/Voltage-B
Calibration
screen will prompt the user to begin the
Negative Current/Voltage-A Calibration
program. Connect a
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