RMG EC 900 Operating Instructions Manual page 4

CONTENTS
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Servicing, maintenance and troubleshooting ............................................................... 22
Changing the battery ................................................................................................... 22
Removal ...................................................................................................................... 22
Special condition for EC 921 / EC 922 ....................................................................... 23
Connection value limits for EC 921 / EC 922 .............................................................. 23
INSTALLATION .................................................................................. 26
Connecting the pressure transmitter ................................................................. 26
Three-way check valve ................................................................................................ 26
Electrical connections ........................................................................................ 27
Devices for Ex zone 1 (EC 911 and EC 912) ................................................................ 27
Devices for Ex zone 2 (EC 921 and EC 922) ................................................................ 28
Pin assignments - modem/Ethernet ............................................................................ 29
Pin assignments of the serial interface ........................................................................ 29
Connection of an external CU 900 communication module ......................................... 30
Requirements for the protection class IP65 ................................................................ 31
Example of connection ................................................................................................ 31
COMMISSIONING .............................................................................. 32
Configuring the interface .................................................................................... 32
EC 911 and EC 912 ..................................................................................................... 32
EC 921 and EC 922 ..................................................................................................... 33
Defining codes .................................................................................................... 34
Setting the contrast ............................................................................................ 34
OPERATION ....................................................................................... 35
How to operate the EC 900 ................................................................................ 35
Structural design ......................................................................................................... 35
Keys ..................................................................................................................... 37
Accessing device data ........................................................................................ 38
Data categories ........................................................................................................... 38
Codes .......................................................................................................................... 38
Calibration switch ........................................................................................................ 39
Preconditions for important operations ....................................................................... 40
Setting totalizers ...................................................................................................................................... 40
Resetting totalizers .................................................................................................................................. 40
Resetting archives ................................................................................................................................... 40
Resetting logbooks .................................................................................................................................. 40
Changing the U1 code (Proceed in the same way to change the U2 code.) ........................................... 40
Changing the C1 code (Proceed in the same way to change the C2 and C3 codes.) ............................. 40
Changing parameters.......................................................................................... 41
Examples of programming .................................................................................. 41
Inputting a code .......................................................................................................... 42
Displaying and changing parameters for calculating the K coefficient ......................... 43
Displaying and changing pressure parameters ............................................................ 45
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