MOBILTEX® DATA LTD.
Calgary, Alberta
www.corTalk.com
TITLE:
RMU1 Installation and Configuration Guide
DOCUMENT NO.:
RMU1-MAN-001
SHEET:
42 of 53
REV:
1.14
6.3.3
Measurement slots Configuration
The RMU1 is capable of transmitting 6 slots of analog information to corView. The contents of each slot is determined
by the selected measurement type. Refer to section 5.2 for detailed descriptions of each measurement type, including
the information transported in each slot. A description of each data slot is also provided in the ‘Readings’ area of the
configuration screen.
Each data slot may have the following attributes modified:
The slot may be disabled if the measurement is not needed
Low and high limit alarms may be set
The reading taken at the physical inputs may be scaled and offset for transmission
The input range may be selected for current inputs
The data slot analog measurement may be replaced with the isolated digital input state
The following ranges apply to coupon current and bond shunt measurements:
Coupon Current: +/-6mADC, 4.25mAAC Low Range
+/-60mADC, 42.5mAAC Med Range
+/-200mADC, 140mAAC High Range
Bond Shunt:
+/-6mVDC, 4.25mVAC Low Range
+/-60mVDC, 42.5mVAC Med Range
+/-200mVDC, 140mVAC High Range
A convenient coupon calculator is provided for setting the scaling factor when coupon current density or bond current
is desired instead of raw current measurements.
6.3.4
Depolarization (CP33 and CP38 Measurement Types Only)
Depolarization may be enabled in single coupon mode. Depolarization parameters allow the RMU1 to disconnect the
coupon from the structure for configurable amounts of time at periodic intervals. Coupon potential readings taken at
the end of depolarization cycle (assuming long enough disconnect duration is configured) will be equivalent to a native
coupon potential reading.
The ‘Initial Delay’ parameter sets how long, in days that the RMU1 will wait after a power-up before initiating the first
depolarization cycle. When set to a value of 0, the RMU1 will wait one wakeup cycle (6 hours) before disconnecting
the coupon.
The ‘Interval’ parameter sets how often a depolarization cycle occurs.
The ‘Duration’ parameter set how long the coupon is disconnected from the structure for each depolarization cycle. The
duration parameter must be less than the interval parameter.
6.3.5
Periodic Report Interval
The periodic report interval determines how often the RMU1 will send scheduled readings to corView. This parameter
is normally locked down at the factory according to the purchased airtime plan.
For 1 hour reporting plans, an extra option labelled ‘Enh. Message Reliability’ is present that is only applicable to the
RMU1-S. To increase battery life, this option should be left unchecked. However, if the unit is installed in a challenging
RF environment and message loss is apparent, then the option should enabled.
Note that the RMU1-I and the RMU1-G will collect readings at a different rate than the transmission rate for readings
periods less than a day. For example, units that take periodic readings every hour will transmit a batch of 12 readings
every 12 hours. Similarly, units that take periodic readings every 6 hours will transmit a batch of 4 readings every 24
hours. If satellite/cellular coverage is inadequate for successful data transmission at the scheduled time, the unit will
continue to accumulate readings and try to send the data at a later periodic reading interval. The RMU1-I/G is able to
buffer up to 16 readings for transmission; if the unit is unsuccessful at sending the readings to corView at that point, the
oldest reading in the buffer will be discarded to make room for the next periodic reading measurement.
