Note: n
pressing the key.
The display contents can be printed out duri g display hold by
1.7.14 Connection Fault:
1.7.15 Short Detected:
1.7.16 Voltage / Current Overscale:
1.7.17 RS232 Output Format
1.7.18 Alarm Flags
In voltage / current source mode, if the PC6-IDOS is unable to control the
voltage/current output (e.g. because there is no loop back in the current
mode), the message “Connection Fault” will flash on the lower line
accompanied by a bleep at 1 Hz. The message will continue until the user
presses the or key ( after fault is rectified ) or the user exits
from source mode.
If the 24V output is ON and it is shorted to 0V, the message “*Short
detected*” will be displayed on the lower line accompanied by a bleep at
1 Hz. This message will be cleared after approximately 5 seconds. In this
condition the 24V supply will be switched off for safety.
In Voltage measure mode, if a voltage in excess of 55V is connected to
the PC6-IDOS the message “*OVERSCALE*” will be displayed on the
lower line, until the voltage falls within the input limits.
In Current measure mode, if a current in excess of 55mA enters the mA
terminal, the PC6-IDOS will display “*OVERSCALE*” on the upper line
and the lower line will scroll the message “Check connections: Press
MENU to continue”. Pressing the key will remove the message
provided the current measured is within range. This message may also
appear in the source mode under connection fault conditions. Source
mode will change to measure mode for safety.
If the current overscale message occurs when the PC6-IDOS is in timed
RS232 output mode, the unit will exit from the timed output mode.
If there is an excess voltage at the mA input when the PC6-IDOS is
placed into current measurement mode, the message “Connection Fault”
will be scrolled on the lower line. Once the fault has been rectified, press
the key to return to measuring mode.
The output format is as follows:
LF
Time & date ( 1100) +LF
display top line (16 characters ) + LF
display lower line (16 characters ) + LF
alarm flag (1 character ) + LF
A single character is output to indicate the various
pressure alarm conditions as given below:
* overload pressure level exceeded
(pressure warnings, 1.7.8 & 1.7.12)
> pressure exceeds user set high limit
< pressure below user set low limit
“ ” a space if no alarms apply.
c connection fault
s short detected
23:13:30 08
Note: If two (or more) conditions occur which require a message display, the
highest priority condition in the above list will be displayed. The sequence of
messages given above set the priority except 'Switch Off' which comes last.
If more than one symbol is applicable, they are displayed one after the other.
1.7.19 Display Symbols
†
†
Top line symbols
Bottom line symbols
13Page
or
or
Log Status
ON
Pressure
Port 1
selected
Pressure
Port 2 (EPM)
selected
Rs232 Output
Status ON
Timed
Log / output
Keyed
Log / output
Source Step
Mode
Measure
Mode
& P-V / P-mA
Root
Function
Source Mode
Ramp
Nudge
Mode
(UP)
Nudge
Mode
(DOWN)
Log Status ON
File Open
MENU
MENU
PRINT
LOG
K0354, Iss. 1
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