KMC Controls TPE-1483 Series(2004-2008) - Manual (Page 6)

717-019-06
KMC Controls
P.O. Box 497
19476 Industrial Drive
New Paris, IN 46553
U.S.A.
TEL: 574.831.5250
FAX: 574.831.5252
E-mail: [email protected]
Set-Up Continued.
OPERATION
For normal operation such as 0 to 100 PSI, the pressure applied to the High port must be higher than the
pressure applied to the Low port. If the pressure connection is reversed then the transmitter will always
output 4 mA or 0 V.
If the Low port is left open to ambient pressure, then the High port is used to measure a positive pressure
and 0 PSI = 4 mA and 100 PSI = 20 mA.
For bidirectional operation such as +/-100 PSI, the pressure applied to the High port should be higher than
the pressure applied to the Low port for a positive output response.
Negative pressure is indicated if the High pressure is less than the Low pressure. In this case –100 PSI = 4
mA and +100 PSI = 20 mA. Since the transmitter is linear 0 PSI = 12 mA.
CALIBRATION
With both ports open to the ambient pressure or equalized at 0 pressure:
1. Press and hold the auto-zero button or provide contact closure on the ZERO terminals for at least 3 sec-
onds.
2. Release the button or terminals and the device will calculate and store the new zero point.
NOTE: To protect the unit from accidental zeroing this feature is enabled only when the detected pressure
on both ports is less than 5% of the full range.
It is not recommended that the span calibration be performed in the field unless a high quality
calibrator is available.
Maintenance
No routine maintenance is required. Each component is designed for dependable, long term reliability and
performance. Careful installation will also ensure long term reliability and performance.