SAGEON PSMC I PRODUCT MANUAL
PM990-2999-00, Rev 5
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CTRL INHIBIT
DISABLED
CEMF CELL 1
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CEMF CELL 2
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EXTERNAL LVD
DISBALED
3.6 ANALOG CALIBRATION
The next two menus are used to calibrate the analog channel inputs. The first menu, “
Calibrate
Zero
” nulls out any offset due to amplifier zero-offset and/or analog to digital converter zero-error.
The second menu “
Calibrate Gain
” sets up each channel to accurately read that channels input.
When completed the SAGEON PSMC I has a zeroed measurement point to reference all others from
and a scaling factor to allow it to read out in amps or degrees as required. Proper calibration is
critical to the SAGEON PSMC I’s performance and customer satisfaction. Properly completed the
SAGEON PSMC I should only require a yearly verification of the measurement accuracy.
3.6.1 Calibrate Zero
The “
Calibrate Zero”
menu provides a fast and simple means to null out the analog
measurement sense leads. This process requires the user to short the measurement leads
together as close to the actual measurement point as possible. For this reason sense leads
should be left open at the measurement end to facilitate this procedure on start-up.
WARNING: Zeroing an analog channel without shorting the measurement leads can
dramatically offset the display measurement. While no physical damage
will result the user may require a service call, to open, then short and zero
the input, in order to restore proper operation.
DANGER: NEVER short analog measurement leads that are connected to their sense
points on the power plant. Arcing and damage to inline protection devices
and/or equipment may result.
The menu structure provides a prompt:
INPUTS SHORTED? CONFIRM? NO
that the
user must toggle to
YES
with the “
Next
” or “
Prev
” key before the SAGEON PSMC I will
allow the user to press “
Select
” and zero the channel as a safety measure.
This procedure assumes a new installation where each analog channel would require a full
calibration before use:
