ENDEVCO 6634C
INSTRUCTION MANUAL
IM6634C
Page 4-3
2.
INPUT SETTINGS
The Model 6634C can be remotely set to accept inputs from a variety of transducers and can be set to the sensitivity of
the transducer so that the outputs are normalized to engineering units.
When the 6634C is powered-up, it is in the LOCAL MODE, where the unit takes its instructions from the keyboard. At
power-up, the input is set to the input type and input sensitivity from the last used setup, which was previously stored in
non-volatile memory. The Digital Readout displays the vibration amplitude corresponding to the DC Output setting with
the decimal point fixed by the output full scale setting.
The unit can be switched to REMOTE MODE by a Remote command sent to the unit over the Serial Interface. (The
optional Model 35843 Serial Interface Board must be installed to permit Remote Mode operation.) Even with the 35843
board installed, the LOCAL/REMOTE pins of the 9-pin "D" connector must be connected together throughout the entire
period of remote operation. Then, a "Remote" command [ZnnXXX ;] received over the RS-232 bus will initiate remote
operation. (If RS-232 interface connector is removed from 6634C, the unit immediately reverts to LOCAL mode of
operation.)
A.
INPUT TYPE
To remotely set the Input Type, send one of the following commands to the 6634C:
T0XXXX ;
Set input to single-ended PE input type
T1XXXX ;
Set input to velocity coil input type
T2XXXX ;
Set input to RCC input type
T3XXXX ;
Set input to differential PE input type
If new input type is successfully setup, no response will be provided by the 6634C. If a problem is encountered,
and unit is in the Listener/ Talker mode, one of the following messages will be provided:
E0XXXX" BEL"
Function not installed, unit will proceed with previous settings
E1XXXX "BEL"
Setup entered is not allowed; unit will proceed with previous settings
To determine the current input type setting, send the following command to the 6634C (after selecting the specific
6634C unit as Listener/Talker using the InnXXX; command):
T?XXXX ;
Request current input type
Unit responds with:
TnXXXX "ACK"
where n is the number corresponding to byte 1 of the input type command, i.e.:
T0XXXX "ACK" = Single-Ended PE
T1XXXX "ACK" = Velocity Coil
T2XXXX "ACK" = Remote Charge Converter (RCC)
T3XXXX "ACK" = Differential PE
B.
INPUT SENSITIVITY
To remotely set the Input Sensitivity, send the following command to the 6634C:
Snnnnn; Set input sensitivity to nnnnn, where nnnnn is in floating point decimal
format. Its
value is equal to 0.(byte0)(byte1)(byte2)(byte3) E (byte4).