INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 94)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
TROUBLESHOOTING GUIDE 10-2
“Unbalanced” or damaged
coaxial cable.
Check cable for any signs of
damage such as broken shield.
Replace cable.
Unit shows “Lock” with no
crystal, holder and cable
connected to the crystal channel.
The capacitance was probably
adjusted with the crystal, holder
and cable combined. With
everything removed, the “Lock”
light just means that the
capacitance is now grossly out of
adjustment.
This is normal. Re-connect the
crystal, holder and cable.
Unit shows “Lock”, but the
frequency reading is at its lowest
and the resistance reading is
about 1 ohm.
An electrical short across the
crystal input.
Check the cable, holder, and the
crystal for short. Remove short
or replace the defective part.
Wrong COMM port number
selected.
Set the correct COMM port
number in the Setup|Comm Port
Setting Menu.
“No Clear to Send Signal” error
message when attempting
communications with RQCM.
RS-232 Cable not connected to
RQCM.
Connect RS-232 cable to RQCM
Wrong COMM port number
selected.
Set the correct COMM port
number in the Setup|Comm Port
Setting Menu.
Incorrect RQCM Interface
address.
Set an Interface Address in the
Setup|Comm Port Settings Menu
and click the Send Address
button to send to RQCM
“Error reading data” message,
“Timeout” when attempting
communications with RQCM
COMM port not enabled. Enable COMM port in PC’s
BIOS