2-49
1010ENFM-3B
Section 2
Low Energy Rate
The [Low Energy Rate] menu cell allows you to set the LO Alarm relay trip-point and the position of the
LO Alarm cursor on the Energy Stripchart Display. The entered value must fall within the Energy Flow
Rate (Ve) analog span for the HI Alarm cursor to appear on the Graphic Screen.
To set the Low Flow Alarm:
To activate numeric entry press
Use the numeric keys to type the Low Flow alarm setpoint.
To store data press
The following Alarm Relay Setpoints are set in the same way as the two previously shown ex-
amples by entering numeric values and storing the data.
High CE (Available with units equipped with Analog Inputs only.)
The [High CE] menu cell allows you to set the high alarm relay-trip point and the position of the high
alarm cursor on the StripChart Display (1010EN unit only). The entered value must fall within the CE
analog span for the high alarm cursor to appear on the Graphic Screen.
Low CE (Available with units equipped with Analog Inputs only.)
The [Low CE] menu cell allows you to set the low alarm relay trip-point and position of the low alarm
cursor on the StripChart Display (1010EN unit only). The entered value must fall within the CE analog
span for the low alarm cursor to appear on the Graphic Screen.
High Flow
The [High Flow Alarm] menu cell allows you to set the HI Alarm relay trip-point and the position of the HI
Alarm cursor on the Stripchart Display. The entered value must fall within the volumetric flow (Vfo)
analog span for the HI Alarm cursor to appear on the Graphic Screen.
Low Flow
The [Low Flow] menu cell allows you to set the LO Alarm relay trip-point and position of the LO Alarm
cursor on the Stripchart Display. The entered value must fall within the vol-umetric flow (Vfo) analog
span for the LO Alarm cursor to appear on the Graphic Screen.
Important Note: A caution on the use of upper and lower flow limits (used to prevent flow mis-
registration) prior to using the Reversal Zero technique (Reversamatic): If the negative flow rate
that the meter reads in the step during which the transducers are reversed is more negative than
the lower flow limit, the meter will re-register positive and the Reversal Zero cycle will thus be
corrupted.
Therefore, postpone the installation of upper and lower flow limits until the reversal zero proce-
dure is executed successfully. For pipes that combine large diameters with very high flow veloci-
ties, it may be necessary to move the upper and lower flow limits out of the way until the reversal
zero is completed. Moreover, pipes of this size frequently have excellent intrinsic zero perfor-
mance and may not even need zeroing.
ENT
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