Emerson Rosemount 400, Rosemount 400 VP Quick Start Guide
00825-0100-3400, Rev AA
Rosemount™ 400 and 400 VP
Contacting Conductivity Sensors
Quick Start Guide
May 2020
Quick Start Guide May 2020
Essential Instructions
Read this page before proceeding!
Emerson designs, manufactures, and tests its products to meet many national and international
standards. Because these instruments are sophisticated technical products, you must properly install,
use, and maintain them to ensure they continue to operate within their normal specifications. You
must adhere to the following instructions and integrate them into your safety program when
installing, using, and maintaining Emerson's Rosemount products. Failure to follow the proper
instructions may cause any one of the following situations to occur: loss of life, personal injury,
property damage, damage to this instrument, and warranty invalidation.
• Read all instructions prior to installing, operating, and servicing the product.
• If you do not understand any of the instructions, contact your Emerson representative for
clarification.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation, and maintenance of the
product.
• To ensure proper performance, use qualified personnel to install, operate, update, program, and
maintain the product.
• When replacement parts are required, ensure that qualified people use replacement parts
specified by Emerson. Unauthorized parts and procedures can affect the product's performance,
place the safe operation of your process at risk, and VOID YOUR WARRANTY. Look-alike
substitutions may result in fire, electrical hazards, or improper operation.
• Ensure that all equipment doors are closed and protective covers are in place, except when
maintenance is being performed by qualified people, to prevent electrical shock and personal
injury.
Note
The information contained in this document is subject to change without notice.
WARNING
Hazardous area installation
Installations near flammable liquids or in hazardous area locations must be carefully evaluated by
qualified on site safety personnel.
To secure and maintain intrinsically safe installation, use an appropriate transmitter/safety barrier/
sensor combination. The installation system must be in accordance with the governing approval
agency (FM, CSA, or BASEEFA/CENELEC) hazardous area classification requirements. Consult your
transmitter Reference Manual for details.
Proper installation, operation, and servicing of this sensor in a hazardous area installation are
entirely the operator's responsibility.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end
users’ equipment. This could be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.
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May 2020 Quick Start Guide
Contents
Specifications...............................................................................................................................5
Install the sensor.......................................................................................................................... 7
Calibrate and maintain............................................................................................................... 22
Troubleshoot............................................................................................................................. 27
Accessories................................................................................................................................ 31
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Quick Start Guide May 2020
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May 2020 Quick Start Guide
1 Specifications
Wetted materials
Electrodes Titanium
Insulator Glass filled PEEK
Hex block 316 stainless steel
O-ring EPDM
Temperature range
Standard 32 to 221 °F (0 to 105 °C)
With optional integral junction box 32 to 392 °F (0 to 200 °C)
Maximum pressure
250 psig (1825 kPa [abs])
Vacuum
At 1.6-in. Hg (5.2 kPa), air leakage is less than 0.005 SCFM (0.00014 m3/min.)
Cell constants
0.01, 0.1, and 1.0/cm
Process connection
¾-in. (19.1 mm) male national pipe thread (MNPT)
Cable length
10 ft. (3 m) standard; for longer cable lengths, choose option -60 (integral junction
box) and order interconnecting cable separately; interconnecting VP6 cables sold
separately (see Accessories).
Table 1-1: Weights and Shipping Weights
Rounded up to the nearest 1 lb. or 0.5 kg.
Sensor Weight Shipping weight
Rosemount 400 with
10-ft. (3.1 m) integral
cable
Rosemount 400 with
50-ft. (15.2 m) integral
cable
Rosemount 400VP with
Variopol cable connection
Quick Start Guide 5
1 lb. (0.5 kg) 2 lb. (1.0 kg)
4 lb. (2.0 kg) 5 lb. (2.5 kg)
1 lb. (0.5 kg) 2 lb. (1.0 kg)
Quick Start Guide May 2020
Table 1-1: Weights and Shipping Weights (continued)
Sensor Weight Shipping weight
Rosemount 400 with
integral junction box
3 lb. (1.5 kg) 4 lb. (2.0 kg)
Table 1-2: Flow Cell (24092-02) Specifications
Wetted materials
Body and nut Polycarbonate and polyester
¼-in. (6.4 mm) fittings 316 stainless steel
O-ring Silicone
Process connection
Compression fittings for ¼-in. (6.4 mm) OD tubing
Temperature range
32 to 158 °F (0 to 70 °C)
Maximum pressure
90 psig (722 kPa [abs])
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May 2020 Quick Start Guide
2 Install the sensor
Keep ¼ in. (6.4 mm) clearance between electrodes and piping. The
electrodes must be completely submerged in the process liquid (i.e., to the
level of the threaded connection). See Figure 2-1 to Figure 2-6 for
recommended orientation and installation. You can install Rosemount
400/400VP sensors with 0.1 and 1.0/cm cell constants in ¾-in. (19.1 mm)
pipe tees. You can also install the sensors in 1-in. (25.4 mm) tees with a ¾-in.
(19.1 mm) bushing.
If the sensor is installed in a pipe tee or flow cell with the sample draining to
open atmosphere, bubbles may accumulate on the electrodes. Trapped
bubbles will cause errors. As bubbles accumulate, the conductivity reading
normally drifts down. In the plastic flow cell, bubbles are readily visible. To
control bubble formation, apply a small amount of back pressure to the flow
cell or pipe tee.
Figure 2-1: Sensor Orientation
A. Trapped air
B. Trapped sludge
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Quick Start Guide May 2020
Figure 2-2: Direct Insertion in a Pipe
A. Sensor
B. Weldalet
C. Process piping
Figure 2-3: Insertion in a Pipe Tee
1-in. (25.4 mm) pipe tee with ¾-in. (19.1 mm) bushing shown
A. Sensor
B. Outlet
C. Inlet
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Figure 2-4: Insertion in a Pipe Tee
1-in. pipe tee with ¾-in. bushing shown.
A. Inlet
B. Outlet
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Quick Start Guide May 2020
Figure 2-5: Insertion in a Pipe Tee
A. Flow
B. Sensor
C. ¾-in. (19.1 mm) male national pipe thread (MNPT), typical
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