11
Annex
Page 138
gas-lab
Q1
H672 P min methane
An input signal indicates the violation of the pmin limit of the methane gas bottle. This
signal does not prevent a following calibration gas injection, but indicated a drained
methane calibration gas.
H674 Pmin test gas
An input signalling a violation of the pmin limit of the gas cylinder for the automatic test
gas injection. This signal does not prevent a following automatic test gas injection, but
indicated a drained test gas.
H675 Tmin room
An input signal indicates the violation of Tmin limit of ambient temperature or the room
temperature measurement falls below the hint limit. This signal does not prevent from
futhur measurement progress, but shows a possible impact on the measurement
accuracy.
H676 Tmax room
An input signal indicates the violation of Tmax limit of ambient temperature, or the room
temperature measurement exceeds the reference limit. This signal does not prevent from
futhur measurement progress, but shows a possible impact on the measurement
accuracy.
H678 Tmin test gas
An input signal indicates the violation of Tmin limit ofthe test gas cylinder. This signal
does not prevent a test gas injection, but shows a possible impact on the measurement by
condensation of higher hydrocarbons at temperatures below the hydrocarbon dew point.
H700 Pulse buffer overflow
The parameterisation of the pulse outputs defines a pulse value and maximum output
frequency. If more volume pulses occur than can be dent out with the maximum output
frequency, the
gas-net
Q1 will retain up to 1000 pulses. These pulses will be sent out as
soon as possible. Only if this pulse buffer isfilled up, too, further incoming pulses are
rejected. This situation is indicated by this hint.
Note:
To avoid loosing any pulses, ensure that the pulse value and the maximum output
frequency are in the correct proportion to the maximum flow when parameterising the
device.