Mettler Toledo GPro 500 TDL Technical Data Manual
GPro 500 TDL Series
Compact Spectrometer
with Versatile Process Adaptions
Technical Data
Short description
The GPro
®
500 TDL Series is designed for tough and challenging gas measurement applications. The
series is highly suited to demanding process applications where accuracy and fast response is crucial
despite a varying background gas composition and a high dust load. The range of process adaptions
provides the ultimate in convenient process connection exibility, including for the rst time the ability to
operate without the requirement for process purge on low particulate applications using the optional non-
purge probe design. The GPro Series can be easily calibrated without interrupting the process, providing a
reliable, low maintenance and exible in situ gas measurement solution.
Outstanding features
– Interference-free in situ or extractive measurement technology
– Easy calibration without interrupting the process
– 12 month recommended verication interval
– Highly exible process adaptions
– Different styles and insertion lengths to suit applications with all types of geometry,
incl. DN50 pipes with the wafer cell
– Large selection of materials for the wetted parts
– Easy installation with either one ange, or for short pathlengths a two ange conguration,
with in-line “wafer“ cell, or with extractive cell
– No pre-alignment of anges required
– Process purge-free option for clean/dry gases (application dependent)
– Approval for hazardous areas ATEX zone 1, IECEx and FM Class 1 Div 1
– Optional SIL2 compliant direct current outputs for installation without M400
Overvi ew / General op eration 2
Inuences on the measurement / Typical applications 3
Installation examples (drawings and tables) 4
System overview 19
Measurement specications 21
Technical specications 25
Signal cable connections 27
Wiring diagrams (ATEX and US version) 28
Gas analyzer GPro 500 product key 30
Ordering information 32
Contents
GPro 500 TDL
2
Overview / General operation GPro 500 TDL Series
Overview
Process gas analyzers are used for continuous determination of the concentration of one or more gases in
a gaseous mixture. The concentration of gases in a process is decisive for the automation and optimization
of processes to ensure product quality.
The fast measurement of gas concentrations directly in the process is the main advantage of in situ diode
laser gas analyzers. This is because in situ analytical procedures feature physical measurements directly
in the actual process. In contrast to extractive gas analysis, no sample needs to be extracted, conditioned
and routed into the analyzer via a sample line. Alternatively, the GPro 500 can be installed in a bypass line
with respect to process accessibility for manual intervention, in case of high process temperature, pressure
and / or specic geometry of the measurement location. Flexibility of the connection to the process is key to
delivering a simple to install analyzer that allows a truly representative measurement of the gas to be made
at the optimum location in the process line. A variety of insertion probes or alternative in-line wafer cells
make the GPro Series the ultimate in process connection convenience. An analyzer carrying out in situ
measurements must always take into account changing process conditions and be able to automatically
compensate for them. Therefore, accurate temperature and pressure compensation is highly recommended.
Also, extreme ruggedness of the system is important since it is in direct contact with the process gas.
The GPro 500 gas analyzer offers compact, service-friendly design with simple operation and exceptional
performance data. It is extremely rugged, requires little maintenance and provides high availability.
The GPro 500 operates in a wide range of process temperatures and pressures and remains uninuenced
by varying concentrations of dust (particles) in the gas. These features, together with fast measurements,
mean that diode laser gas analysis with the GPro 500 provides the ideal alternative to the drawbacks of
established extractive gas measurement methods.
General operation
A diode laser emits a beam of near-infrared light, which passes through the process gas and is then
reected back into the detector by an optical device that is situated and the end of the probe. The wavelength of the laser diode output is tuned to a gas specic absorption line. The laser continuously scans the
absorption lines with a very high spectral resolution. For analysis, absorption, strength and line shape of
the return signal is used. The inuence of cross interferences from background gases is negligible, since
the wavelength specic laser light is absorbed very selectively by only one specic molecule. The minimum
detectable limit, the accuracy and the resolution is dependent on the probe length (optical path length), the
process temperature and pressure.
GPro is a registered trademark of the METTLER TOLEDO Group in Switzerland, India, USA, China, European
Union, Japan, South Korea and Russia.
ISM is a registered trademark of the METTLER TOLEDO Group in Switzerland, Brazil, USA, China, European
Union, South Korea, Russia and Singapore.
Kalrez is a registered trademark of DuPont Performance Elastomers LLC.
All other trademarks are the property of their respective holders.
3
Inuences on the measurement / Typical applications GPro 500 TDL Series
Inuences on the measurement
Dust load
As long as the laser beam is able to generate a signal for the detector, the dust load of the process gases
does not inuence the analytical result. By amplifying the signal automatically, measurements can be
carried out without any negative impact. The inuence from high dust load is complex and is dependent on
the optical path length (probe length), particle size and particle size distribution. At longer path lengths the
optical attenuation increases rapidly. Smaller particles also have a signicant impact on the optical attenuation: the smaller the particles are, the more difcult the measurement will be. For high dust load applications, please consult your local METTLER TOLEDO representative.
Temperature
The temperature inuence on an absorption line must be compensated for. An external temperature sensor
can be connected to the GPro 500. The signal is then used to correct the measurement results. Without
temperature compensation the measurement error caused by process gas temperature changes affects the
measurement substantially. Therefore, in most cases an external temperature signal is recommended.
Pressure
The process gas pressure affects the line shape of a molecular absorption line and inuences the measurement results. An external pressure sensor can be connected to the GPro 500. When the correct process gas
pressure is supplied, the GPro 500 uses a special algorithm to adapt the line shape and effectively compensate for the pressure inuence as well as the density effect. Without compensation the measurement
error caused by process gas pressure changes is substantial. Therefore, in most cases an external pressure
signal is recommended.
Cross interference
Since the GPro 500 derives its signal from one or more fully-resolved molecular absorption lines, cross
interference from other gases is eliminated. The GPro 500 is therefore able to measure the desired gas
component very selectively.
Note:
Always take great care when choosing the measurement location. Positions where there are fewer particles,
the temperature is lower or there is a more suitable process pressure, are recommended. The more optimized the measurement location is, the better the overall performance of the system will be. For advice on
the optimal measurement location, please contact your local METTLER TOLEDO representative.
Solar radiation and process radiated heat.
Exposure of the head of the GPro 500 to very high temperatures, for example, solar radiation and / or excessive localized heat sources (such as radiated heat from process walls or adjacent equipment) can cause
internal overheating of the device. See manual for further information.
Typical applications
Industry Safety Control Process Control Inertization
Chemical • • •
Petrochemical • • •
Rening • • •
Power – •
Hazardous waste – •
Tank farms / Vapor recovery • – •
4
Installation examples
Dimensions of the
standard purged
probe (SP)
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➌
Insertion length, the part of the probe that has to protrude into the pipe for effective purging.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
1
3
D = ¼"
or 6 mm
4
2
119 mm (4.68")
115 mm (4.52")
50 mm (± 0,3 mm)
(1.97" [± 0.01"])
f
290 mm (11.42")
175,5 mm (6.91")
½" NPT
Installation examples (drawings) GPro 500 TDL Series
5
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of the
non-purged probe (NP)
with optional lter
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➌
Insertion length, the part of the probe that has to protrude into the pipe for effective purging.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
Note:
•
When using the PTFE lter, the maximum process gas temperature is 150 °C (302 °F).
•
Metal lters available: 3 µm, 40 µm, 100 µm, 200 µm.
50 mm (± 0,3 mm)
(1.97" [± 0.01"])
3
119 mm (4.68")
D = 6 mm or ¼"
1 4
2
138 mm (5.43")
120 mm (4.72")
29 mm (1.14")
175,5 mm (6.91")
½" NPT
290 mm (11.42")
6
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of the non-purged
probe (B) with blow-back lter
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➌
Insertion length, the part of the probe that has to protrude into the pipe for effective purging.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
Note:
•
When using the PTFE lter, the maximum process gas temperature is 302 °F (150 °C).
•
Metal lters available: 3 µm, 40 µm, 100 µm, 200 µm.
50 mm (± 0,3 mm)
(1.97" [± 0.01"])
3
1
2
4
120 mm (4.72")
300 mm (11.81")
D = 6 mm or ¼"
f
290 mm (11.42")
175,5 mm (6.91")
½" NPT
7
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of
the wafer (W)
with optional
lter
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➌
Insertion length, wafer thickness (distance between pipe anges).
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
Note:
•
Filters only available on DN100/4" wafers.
•
When using the PTFE lter, the maximum process gas temperature is 302 °F (150 °C).
•
Metal lters available: 3 µm, 40 µm, 100 µm, 200 µm.
D1 = ¼"
or 6 mm
269 mm (10.59")
134.5 mm (5.29")
32 mm
(1.26")
D2 = ¼"
or 6 mm BT
120 mm (4.72")
1
4
157.20 mm (6.20")
54 mm
(2.13")
57 mm
(2.24")
3
175,5 mm (6.91")
½" NPT
8
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of
the Wafer (W)
Dual Window
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➌
Insertion length, wafer thickness (distance between pipe anges).
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
157.2 mm (6.20")
54 mm
(2.13")
57 mm
(2.24")
3
D1 = ¼"
or 6 mm
320 mm (12.60")
134.5 mm (5.29")
32 mm
(1.26")
D2 = ¼"
or 6 mm BT
120 mm (4.72")
1
4
100 mm (3.94")
175,5 mm (6.91")
½" NPT
9
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of the
extractive cell (E)
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
272 mm (10.70")
150 mm (5.90")
D = 6 mm or ¼" (BT)
35 mm
(1.37")
35 mm
(1.37")
50 mm
(1.96")
20 mm
(0.78")
71 mm
(2.79")
142 mm (5.59")
40 mm
(1.57")
2
41
175,5 mm (6.91")
½" NPT
10
Installation examples (drawings) GPro 500 TDL Series
Installation examples
Dimensions of the extractive
cell dual window (DW)
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
35 mm
(1.37")
35 mm
(1.37")
2
1 4
35 mm
(1.37")
35 mm
(1.37")
50 mm
(1.97")
20 mm
(0.78")
238 mm (9.37")
40 mm
(1.57")
D = 6 mm or ¼" (BT)
61 mm
(2.40")
71 mm
(2.79")
150 mm (5.90")
Bore-through
P-Sensor
T-SensorGas IN
Gas OUT
175,5 mm (6.91")
½" NPT
11
Installation examples
Dimensions of the
extractive cell (E) PFA
Denition of the dimensions:
➊
Nominal path length, the default length when GPro 500 is delivered.
It corresponds to the effective path length without purging.
➋
Probe length, the physical length of the probe.
➍
Effective path length, when conguring the GPro 500 with the M400, the double value of the effec-
tive path length must be keyed in (23 effective path length).
2
35 mm
(1.38")
120 mm (4.72")
49 mm
(1.92")
78 mm
(3.07")
41
40 mm
(1.57")
PFA, D = 6 mm or
¼" (BT)
50 mm (1.96")
20 mm (0.78")
Gas IN
Gas
OUT
P-SensorT-Sensor
150 mm (5.90")
175,5 mm (6.91")
½" NPT
Installation examples (drawings) GPro 500 TDL Series
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