5
Functional description
Page 80
gas-lab
Q1
Locks
The parameter list of the Q1 contains various parameters that are not subject to
the calibration lock but protected against wilful changes by an operational safety
mechanism. This protection mechanism is called user or numerical lock. Each of
the two contract parties may define a lock of up to 6 digits. These locks are
opened and closed via the keypad (see Chapter 5.4.2). The device
parameterisation defines the locks that shall be valid.
Setting the clock
A free setting of the device internal clock is only possible if the calibration switch
is open. If the latter is closed, you may only reset the clock within a range of
± 20 seconds (and only once within 24 hours). This restriction applies to all time
sources, especially to the manual clock setting via the device’s operator panel.
If you were successful in resetting the time outside the ± 20 seconds-range, two
warnings will be generated. Unsuccessful adjustments result in
Clock-synch
failed
warnings.
7
DCF-77 (optional feature for the European market)
Optional the gas-net Q1 can have a DCF77 interface for connecting a radio ¬
clock that receives the PTB time normal about DCF-77 radio signal.
If you need further information, please contact
your local agent.
Please see
7
According to the DSfG Specification:
W811: Clock set new
W820: Clock set old
W812: Clock-synch failed