700 RAM I.M.
700 RAM I.M. Rev. 1.1 Page 8 of 12
Successful Modbus™ communications between the RAM and the RS-485 Master Controller will be
indicated by a blinking “CAL” LED. If the Modbus™ communication between the RAM and the 700 Gas
Sensor is not functioning the RAM will display “COMM” and the “FLT” LED will be illuminated.
The 700 Gas Sensor must be set to Serial ID = 01 for proper communications set-up
with the RAM.
3.1 View Sensor Status
View Sensor Status displays all current configurational and operational parameters from the 700 Gas Sensor
attached to it. These typically include sensor type, software version number, detection range, AutoSpan
level, days since last AutoSpan, estimated remaining sensor life, sensor diagnostics, input voltage, 4-20mA
output, and sensor ambient temperature.
To access the View Sensor Status menu, hold the magnet over PGM2 () until the arrow prompt appears
and then hold continuously for 3 seconds. This will display the View Sensor Status text scroll. From the
“View Sensor Status” text scroll, hold the magnet over PGM1 () or PGM2 () until the arrow prompt
appears and then hold continuously for an additional 3 seconds. The display will scroll the complete list of
sensor status parameters sequentially:
Current Software Version (of the RAM)
Sensor Model Type
Range of Detection
Serial ID address
AutoSpan Level
Days Since Last AutoSpan
Remaining Sensor Life
Sensor Diagnostics (varies by sensor type)
4-20mA Output
Input Voltage Supply
Sensor Temperature
Alarm 1 Settings
Alarm 2 Settings
Fault Settings
When the sensor status list sequence is complete, the RAM will revert to the “View Sensor Status” text
scroll. The user can then choose to either: 1) review list again by executing another 3 second hold, 2) move
to another menu item by executing a momentary hold, or 3) return to Normal Operation via 15 second
automatic timeout.
3.2 Set AutoSpan Level
Set AutoSpan Level is used to set the span gas concentration level that is being used to calibrate the sensor.
This level is adjustable from 10% to 100% of range. The current setting can be viewed in View Sensor
Status.
The menu item appears as: “Set AutoSpan Level”
From the “Set AutoSpan Level” text scroll, hold the magnet over PGM1 () or PGM2 () until the arrow
prompt appears and then hold continuously for an additional 3 seconds. The display will then switch to
“XX” (where XX is the current gas level). Swipe the magnet momentarily over PGM2 to increase or PGM1
to decrease the AutoSpan Level until the correct level is displayed. Hold the magnet over PGM1 or PGM2
for 3 seconds to accept the new value. The display will scroll “AutoSpan Level Saved”, and revert to “Set
AutoSpan Level” text scroll.
To Next Page
Loading...
