12
300544660_002_C1
11/2016
- © Leybold
Mounting Orientation
The transmitter and its sensor design can be mounted in any orientation without compromising accuracy or
lifetime, but operation with its inlet port facing upwards is not recommended due to the possibility of contaminants
falling into the port.
Zero Shift From Mounting Orientation
The CTR 100 N transmitters with measurement ranges higher than 1 Torr require little or no zero adjustment if they
are mounted horizontally on the customers system. However, transmitters with ranges of 1 Torr and less require
zero adjustment to compensate for the effects of gravity on the sensor diaphragm if they are mounted horizontally.
For example, for 0.1 Torr models, this shift represents up to 10% of the full-scale range, and thus is significant.
Devices with this range should be mounted vertically as originally calibrated. If this mounting orientation is not
possible, a correction factor must be applied to the transmitter’s output to obtain the correct pressure.
Span/ Accuracy Shift from Mounting Orientation
The CTR 100 N transmitters with measurement range 1 Torr or higher require little or no span adjustment if they
are mounted horizontally on the customer’s system. However, transmitters with ranges lower than 1 Torr will
experience a span shift due to the effects of gravity on the sensor diaphragm if they are mounted horizontally.
These transmitters would also see a degraded accuracy value.
Explosive Environments
The sensor is kept at ambient temperature and contains no heating elements, but the steady-state electronics
power draw can be up to 35 mA, which may exceed the self-ignition threshold for some gases and environments.
Ambient Temperature
The transmitter has an active sensor temperature compensation circuit that minimizes shifts in its output caused by
changes in ambient temperature. However, for best performance, avoid installation in areas where large
temperature gradients and direct cooling like an air-conditioning air stream or heating like a pump exhaust stream
may exist.
Operation in ambient temperatures below 0° C or above 50° C are not recommended since they may reduce the
lifetime of the transmitter’s electronic components.
Bakeout
Bakeout of the entire transmitter is not recommended, as the high temperatures may damage the electronics. The
tran
smitter’s fitting only –
not including the inlet tube - may be baked to 50° C.
OK
OK
NOT OK
OK
