Reference Manual
00809-0100-3560, Rev AB
Rosemount™ Clarity II T1056 Turbidmeter
Turbidity Measurement System
July 2020
Essential instructions
Read this page before proceeding!
Your instrument purchase from Emerson is one of the finest available for your particular application. These instruments have been
designed and tested to meet many national and international standards. Experience indicates that its performance is directly
related to the quailty of the installation and knowledge of the user in operating and maintaining the instrument. To ensure
continued operation to the design specifications, read this Manual thoroughly before proceeding with installation,
commissioning, operation, and maintenance of this instrument.
• 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.
• For clarification of instructions, contact your Rosemount representative.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Use only qualified personnel to install, operate, program, and maintain the product.
• Educate your personnel on the proper installation, operation, and maintenance of this product.
• Install equipment as specified in the installation instructions of the appropriate Reference Manual and per applicable local and
national codes. Connect all products to the proper electrical and pressure sources.
• Use only factory documented components for repair. Tampering or unauthorized substitution of parts and procedures can
affect the performance and cause unsafe operation of your process.
• All equipment doors must be closed, and protective covers must be in place unless qualified personnel are performing
maintenance.
WARNING
Risk of electrical shock
Installation and servicing of this product may expose personnel to dangerous voltages.
Equipment protected throughout by double insulation.
Disconnect main power wired to separate power source before servicing.
Do not operate or energize instrument with case open.
Signal wiring within this box must be rated at least 240 V.
Non-metallic cable strain reliefs do not provide grounding between conduit connections. Use grounding type bushings and
jumper wires.
Unused cable conduit entries must be securely sealed by non-flammable closures to provide exposure integrity in compliance
with personal safety and environmental protection requirements. Unused conduit openings must be sealed with NEMA 4X or
IP65 conduit plugs to maintain the ingress protection rating (IP65).
Electrical installation must be in accordance with the National Electrical Code (ANSI/NFPA-70) and/or any other national or
local codes.
Operate only with front panel fastened and in place.
Proper use and configuration is the operator's responsibility.
WARNING
This product is not intended for use in the light industrial, residential, or commercial environments per the instrument's
certification to EN50081-2.
2
CAUTION
Radio interference
This product generates, uses, and can radiate radio frequency energy and thus can cause radio communication interference.
Improper installation or operation may increase such interference. As temporarily permitted by regulation, this unit has not been
tested for compliance within the limits of Class A computing devices, pursuant to Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection against such interference.
Operation of this equipment in a residential area may cause interference, in which case the operator, at his own expense, will
be required to take whatever measures may be required to correct the interference.
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.
Warranty
Seller warrants that the firmware will execute the programming instructiosn provided by Seller, and that the Goods manufactured
or services provided by Seller will be free from defects in materials or workmanship under normal use and care until the expiration
of the applicable warranty period. Goods are warranted for twelve (12) months from the date of intial installation or eighteen (18)
months from the date of shipment by Seller, whichever period expires first. Consumables, such as glass electrodes, membranes,
liquid junctions, electrolyte, O-rings, catalytic beads, etc. and services are warranted for a period of 90 days from the date of
shipment or provision.
Products purchased by Seller for resale to Buyer ("Resale Products") shall carry only the warranty extended by the original
manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond making a reasonable commercial effeort to
arrange for procurement and shipping of the Resale Products.
If Buyer discovers any warranty defects and notifies Seller thereof in writing during the applicable warranty period, Seller shall, at
its option, promptly correct any errors that are found by Seller in the firmware or Services, or repair or replace F.O.B. point of
manufacture that portion of Goods or firmware found by Seller to be defective, or refund the purchase price of the defective
portion of the Goods/Services.
All replacements or repairs necessitated by inadequate maintenance, normal wear and usage, unsuitable power sources,
unsuitable environmental conditions, accident, misuse, improper installation, modification, repair, storage or handling, or any
other cause not the fault of Seller are not covered by this limited warranty, and shall be at Buyer's expense. Seller shall not be
obligated to pay any costs or charges incurred by Buyer or by any other party except as may be agreed upon in writing in advance
by an authorized Seller representative. All costs of dismantling, reinstallation and freight and the time and expenses of Seller's
personnel for site travel and diagnosis under this warranty clause shall be borne by Buyer unless accepted in writing by Seller.
Goods repaired and parts replaced during the warranty period shall be in warranty for the remainder of the original warranty
period or ninety (90) days, whichever is longer. This limited warranty is the only warranty made by Seller and can be amended only
in a writing signed by an authorized representative of Seller. Except as otherwise expressly provided in the Agreement, THERE ARE
NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESSED OR IMPLIED, AS TO MERCHANTABILITY, FITNESS FOR
PARTICULAR PURPOSE, OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS OR SERVICES.
3
4
Reference Manual Contents
00809-0100-3560 July 2020
Contents
Chapter 1 Quick start guide........................................................................................................7
1.1 Rosemount T1056 screens...........................................................................................................8
Chapter 2 Description and specifications..................................................................................11
2.1 Features and applications.......................................................................................................... 11
2.2 Specifications............................................................................................................................ 11
Chapter 3 Install.......................................................................................................................17
3.1 Unpack and inspect................................................................................................................... 17
3.2 Install.........................................................................................................................................17
3.3 Install debubbler assembly........................................................................................................ 25
3.4 Install sensor..............................................................................................................................28
3.5 Sample point............................................................................................................................. 29
Chapter 4 Wire.........................................................................................................................33
4.1 General wiring information........................................................................................................33
4.2 Prepare conduit openings..........................................................................................................34
4.3 Prepare sensor cable..................................................................................................................34
4.4 Power, output, and sensor connections..................................................................................... 34
Chapter 5 Display and operation.............................................................................................. 43
5.1 User interface............................................................................................................................ 43
5.2 Instrument keypad.................................................................................................................... 43
5.3 Main display...............................................................................................................................45
5.4 Menu system............................................................................................................................. 47
5.5 Using hold................................................................................................................................. 49
Chapter 6 Programming the transmitter.................................................................................. 51
6.1 General programming information............................................................................................51
6.2 Changing start-up settings........................................................................................................ 51
6.3 Configuring and ranging the current outputs.............................................................................52
6.4 Setting a security code...............................................................................................................54
6.5 Security access...........................................................................................................................55
6.6 Using hold................................................................................................................................. 56
6.7 Reset factory default setting...................................................................................................... 57
6.8 Programming alarm relays.........................................................................................................58
Chapter 7 Programming turbidity............................................................................................ 65
7.1 Introduction to programming measurements........................................................................... 65
7.2 Programming turbidity measurements......................................................................................65
7.3 Choosing turbidity or total suspended solids............................................................................. 72
7.4 Entering a turbidity to total suspended solids (TSS) conversion equation...................................77
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Contents Reference Manual
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Chapter 8 Calibrate.................................................................................................................. 81
8.1 Introduction to calibration.........................................................................................................81
8.2 Calibrating turbidity...................................................................................................................81
Chapter 9 Maintenance............................................................................................................89
9.1 Maintaining the transmitter.......................................................................................................89
9.2 Clean the sensor........................................................................................................................ 89
9.3 Replace the lamp/light-emitting diode (LED) board................................................................... 90
9.4 Maintaining the debubbler and measuring chamber..................................................................93
9.5 Replacement parts.....................................................................................................................94
Chapter 10 Troubleshoot........................................................................................................... 97
10.1 Troubleshooting overview....................................................................................................... 97
10.2 Troubleshooting using fault codes...........................................................................................97
10.3 Troubleshooting calibration problems...................................................................................100
10.4 Troubleshooting other problems........................................................................................... 101
Chapter 11 Return of material.................................................................................................. 105
11.1 General return information....................................................................................................105
11.2 Warranty repair..................................................................................................................... 105
11.3 Non-warranty repair.............................................................................................................. 106
Appendix A Verify linearity....................................................................................................... 107
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Reference Manual Quick start guide
00809-0100-3560 July 2020
1 Quick start guide
Complete the following steps to start the Rosemount T1056.
Prerequisites
Refer to Install for installation instructions.
The sensor cable is pre-wired to a plug that inserts into a recieving socket in the analyzer.
The cable also presses through a strain relief fitting.
Procedure
1. To install the cable:
a) Remove the wrenching nut from the strain relief fitting.
b) Insert the plug through the hole in the bottom of the enclosure nearest the
sensor socket. Seat the fitting in the hole.
c) Slide the wrenching nut over the plug and screw it onto the fitting.
d) Loosen the cable nut so the cable slides easily.
e) Insert the plug into the appropriate receptacle on the circuit board.
f) Adjust the cable slack in the enclosure and tighten the cable nut. For wall/
pipe mounting, be sure to leave sufficient cable in the enclosure to avoid
stress on the cable and connections.
g) Plug the cable into the back of the sensor.
h) Place the sensor in either the measuring chamber or the calibration cup.
Important
The sensor must be in a dark place when power is first applied to the
analyzer.
2. Make power, alarm, and output connections as shown in Wire.
3. Once connections are secured and verified, apply power to the transmitter.
When the transmitter is powered up for the first time, the Quick Start screens
appear.
4. Follow the Quick Start Guide to enable live readings.
a) A blinking field shows the position of the cursor.
b) Use or to move the cursor left or right. Use or to increase or
decrease the value of a digit. Use
c) Press ENTER to store a setting. Press EXIT to leave without storing changes.
Pressing EXIT also returns the display to the language selection screen.
Important
When using EPA/incandescent sensors (PN 8-0108-0002-EPA):
Rosemount T1056 7
or to move the decimal point.
Quick start guide Reference Manual
July 2020 00809-0100-3560
• Do not power up the instrument without the sensor connected.
• Do not disconnect and reconnect a sensor while a transmitter is powered.
If this is inconvenient or cannot be avoided:
1. Cycle power to the instrument after connecting the sensor or
2. Perform a slope calibration or standard calibration routine after connecting the
sensor. Following these guidelines will extend the life of the incandescent lamp and
avoid premature warnings and faults due to reduced lamp life.
1.1 Rosemount T1056 screens
Figure 1-1: Quick Start Guide, Rosemount 1056
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Reference Manual Quick start guide
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Figure 1-2: Rosemount 1056 Menu Tree
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Quick start guide Reference Manual
July 2020 00809-0100-3560
10 Emerson.com/Rosemount
Reference Manual Description and specifications
00809-0100-3560 July 2020
2 Description and specifications
• Complete system includes single or dual input analyzer, sensor(s), and debubbler
assembly.
• Choose US EPA Method 180.1 or ISO Method 7027 compliant sensors.
• Resolution 0.001 NTU
• Full featured analyzer with fully scalable analog outputs and fully programmable alarms
with interval timers.
• Intuitive, user-friendly menu in seven languages makes setup and calibration easy.
(1)
2.1 Features and applications
The Rosemount T1056 turbidmeter is intended for the determination of turbidity in water.
Low stray light, high stability, efficient bubble rejection, and a display resolution of 0.001
NTU make the turbidmeter ideal for monitoring the turbidity of filtered drinking water.
You can also use the turbidmeter in applications other than drinking water treatment.
Examples are monitoring wastewater discharges, condensate returns, and clarifiers.
Currently, new ISO 7027 systems are available, with replacement EPA 180.1 sensors
available for current install base. USEPA 180.1 sensors use a visible light source. ISO 7027
sensors use a near infrared light emitting diode (LED). For regulatory monitoring in the
United States, you must use USEPA 180.1 sensors. Regulatory agencies in other countries
may have different requirements.
The turbidmeter consists of a transmitter, which accepts either one or two sensors, the
sensors themselves, and a debubbler/measuring chamber and cable for each sensor. The
cable plugs into the sensor and the transmitter, making setup fast and easy. Sensors can
be located as far as 50 ft. (15.2 m) away from the transmitter.
The turbidmeter incorporates the popular and easy to use Rosemount 1056 transmitter.
Menu flows and prompts are so intuitive that you practically do not need a manual. Analog
outputs are fully scalable. Alarms are fully programmable for high/low logic and dead
band. To simplify programming, the transmitter automatically detects whether an EPA
180.1 or ISO 7027 sensor is being used.
The turbidmeter is available in an optional configuration in which the transmitter,
sensor(s), and debubbling flow cell(s) are mounted on a single back plate. The sensor
cables are pre-wired to the transmitter, so setup is exceptionally fast and easy. Simply
mount the unit on a wall, bring in power and sample, and provide a drain. To order this
option, consult the factory.
2.2 Specifications
Note
Specifications subject to change without notice.
Clarity II is a trademark of Emerson.
(1)
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Description and specifications Reference Manual
July 2020 00809-0100-3560
2.2.1 General specifications
Enclosure
Dimensions
Conduit openings
Display
Security code
Languages
Units
Polycarbonate. Type 4X/CSA 4 (IP65).
Overall: 6.10 x 6.10 x 5.5-in. (155 x 155 x 131 mm). Cutout: ½ DIN
5.45 x 5.45-in. (139 mm x 139 mm)
Accepts ½-in. or PG 13.5 conduit fittings.
Monochromatic graphic liquid crystal display. 128 x 96 pixel display
resolution. Backlit. Active display area: 2.3 x 3.0-in. (58 x 78 mm)
3-digit code prevents accidental or unauthorized changes in
instrument settings and calibration.
• English
• French
• German
• Italian
• Spanish
• Portuguese
• Chinese
Turbidity
• NTU
• FTU
Display resolutionturbidity
Display resolutionTSS
Calibration
methods
Ambient
temperature and
humidity
Altitude
• FNU
Total suspended solids
• mg/L
• ppm
• No units
Four digits; decimal point moves from x.xxx to xxx.x
Four digits; decimal point moves from x.xxx to xxx.x
User-prepared standard, commercially prepared standard, or grab
sample. For total suspended solids, you must provide a linear
calibration equation.
32 to 131 °F (0 to 55 °C). Turbidity only: 32 to 122 °F (0 to 50 °C),
relative humidity 5 to 95 percent (non-condensing)
For use up to 6562 ft. (2000 m).
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Reference Manual Description and specifications
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Storage
temperature
effect
Power
Inputs
Outputs
Current output
accuracy
Terminal
connections rating
RFI/EMI
LVD
-4 to 140 °F (-20 to 60 °C)
Ordering code -02: 20 to 30 Vdc. 15 W min. input power
Ordering code -03: 85 to 265 Vac, 47.5 to 65.0 Hz, switching. 15 W
min. input power
Equipment protected by double insulation.
One or two isolated sensor inputs
Two 4-20 mA or 0-20 mA isolated current outputs. Fully scalable.
Max load: 550 Ohm. Output 1 has supermiposed HART® signal
(configurations 1056-0X-2X-3X-HT only)
±0.05 mA at 25 °C
Power connector (3-leads): 24-12 AWG wire size. Signal board
terminal blocks: 26-16 AWG wire size. Current output connectors
(2-leads): 24-16 AWG wire size. Alarm relay terminal blocks: 24-12
AWG wire size (-02 24 Vdc power supply and -03 85-265 Vac power
supply)
EN 61326
EN-61010-1
Hazardous
location approvals
Relays
Inductive load
Options for CSA: 02, 03, 20, 21, 22, 24, 25, 26, 27, 30, 31, 32, 34,
35, 36, 37, 38, AN, and HT.
Class I, Division 2, Groups A, B, C, & D
Class II, Division 2, Groups E, F, & G
Class III T4A Tamb = 50 °C
Evaluated to the ANSI/UL Standards. The "C" and "US" indicators
adjacent to the CSA mark signify that the product has been
evaluated to the applicable CSA and ANSI/UL Standards, for use in
Canada and the US respectively.
Form C, SPDT, epoxy sealed
Table 2-1: Maximum Relay Current
Supply voltage Resistive
28 Vdc 5.0 A
115 Vac 5.0 A
230 Vac 5.0 A
⅛ HP motor (max.), 40 Vac
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Description and specifications Reference Manual
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WARNING
Risk of electrical shock
Field wiring
terminals
2.2.2 Sensor
Method
Incandescent lamp life
LED life
Wetted materials
Accuracy after
calibration at 20.0 NTU
Cable
Maximum pressure
Removable terminal blocks for power, analog outputs, and sensors
ISO 7027 (using 860 nm LED source).
One year (EPA 180.1)
Three years (ISO 7027)
®
Delrin
0-1 NTU: ±2% of reading or ±0.015 NTU, whichever is
greater.
0-20 NTU: ±2% of reading.
Note
Turbidity values of 2-200 NTU can be measured, but frequent
cleaning may be required to maintain turbidity
measurements.
20 ft. (6.1 m) or 50 ft. (15.2 m). Maximum 50 ft. (15.2 m).
Connector is IP65.
30 psig (308 kPa abs)
(2)
, glass, EPDM
Temperature
Sensor body rating
40 to 95 °F (5 to 35 °C)
IP65 when cable is connected
2.2.3 Debubbler and flow chamber
Dimensions
Wetted materials
Inlet
Drain
Sample temperature
Minimum inlet
pressure
(2) Delrin is a registered trademark of DuPont Performance Elastomers.
14 Emerson.com/Rosemount
18.1 x 4.1-in. (460 mm x 104 mm) diagram (approximately)
ABS, EPDM, Delrin®, polypropylene, nylon
Compression fitting accepts ¼-in. OD tubing; fitting can be
removed to provide ¼-in. FNPT.
Barbed fitting accepts ⅜-in. ID tubing; fitting can be removed
to provide ¼-in. female national pipe thread (FNPT). Must
drain to atmosphere.
40 to 95 °F (5 to 35 °C)
3.5 psig (308 kPa abs).
Reference Manual Description and specifications
00809-0100-3560 July 2020
3.5 psig will provide about 0.01 oz./min (250 mL/min) sample
flow.
Maximum inlet
pressure
Recommended sample
flow
2.2.4 Miscellaneous
Weight/shipping weight
Sensor
Transmitter
Debubbler
30 psig (308 kPa abs). Do not block drain tube.
0.01 to 0.03 oz./min (250 to 750 mL/min)
1 lb./2 lb. (0.5 kg/1.0 kg)
2 lb./3 lb. (1.0 kg/1.5 kg)
3 lb./4 lb. (1.5 kg/2.0 kg)
(rounded to the nearest lb. or 0.5 kg)
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Description and specifications Reference Manual
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Reference Manual
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Install
3 Install
3.1 Unpack and inspect
The Rosemount T1056 Turbidmeter is a complete system for the determination of
turbidity in drinking water. The system consists of the transmitter, sensor(s), cable(s), and
flow chamber/debubbler(s). Consult the table to verify that you have received the parts for
the option you ordered.
Table 3-1: Rosemount T1056 Turbidmeter Parts
Item Model/part number
Single input turbidity transmitter 1056-03-27-38-AN
Dual input turbidity transmitter 1056-03-27-37-AN
Single input turbidity transmitter with HART
Dual input turbidity transmitter with HART 1056-03-27-37-HT
®
1056-03-27-38-HT
Sensor - EPA standards 8-0108-0002-EPA
Sensor - ISO standard 8-0108-0003-ISO
Cable - 3 ft. (0.9 m) 2413800
Cable - 20 ft. (6.1 m) 2409700
Cable - 50 ft. (15.2 m) 2409800
Calibration cup 2410100
Molded chamber/debubbler 24170-00
Note
The transmitter model number is printed on a label attached to the side of the instrument.
3.2 Install
3.2.1 General installation information
1. Although the transmitter is suitable for outdoor use, do not install it in direct
sunlight or in areas of extreme temperatures.
2. Install the transmitter in an area where vibration and electromagnetic and radio
frequency interference are minimized or absent.
3. Keep the transmitter and sensor wiring at least one foot (0.3 m) from high voltage
conductors. Be sure there is easy access to the transmitter.
4. The transmitter is suitable for panel, pipe, or surface mounting. Refer to the figures
below.
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Install Reference Manual
July 2020 00809-0100-3560
WARNING
Electrical shock
Electrical installation must be in accordance with the National Electrical Code (ANSI/
NFPA-70) and/or any other applicable national or local codes.
Do not operate or energize instrument with case open.
Note
Dimensions are in inches (millimeters).
Note
Panel mounting seal integrity (4/4X) for outdoor applications is the customer's
responsibility.
Figure 3-1: Panel Mount Front View
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Figure 3-2: Panel Mount Side View
1. Panel supplied by others. Maximum thickness: 3.75 in. (9.52 mm)
2. 4X mounting brackets and screws provided with instrument
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Install Reference Manual
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Figure 3-3: Panel Mount Bottom View
A. Conduit openings
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Figure 3-4: Panel Cut-out
A. Maximum radius
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Figure 3-5: Wall Mount Front View
A. Four cover screws
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Figure 3-6: Wall Mount Side View
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Figure 3-7: Pipe Mount Bottom View
A. Front panel
B. Panel & pipe mount enclosure
C. 6x Ø conduit openings
D. 2-in. (50.8 mm) pipe mount bracket
E. 2X set U-bolts for 2-in. (50.8 mm) pipe in kit PN 23280-00
The front panel is hinged at the bottom. The panel swings down for easy access to the
wiring locations.
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Reference Manual Install
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Figure 3-8: Pipe Mount Side View
3.3 Install debubbler assembly
See Figure 3-9 for installation.
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Figure 3-9: Debubbler and Flow Chamber
A. Inlet
B. Outlet
C. Sensor port
Procedure
1. Connect the sample line to the inlet fitting.
The fitting accepts ¼-in. OD tubing. See Sample point for recommended
installation of the sample port.
2. Attach a piece of ⅜-in. ID soft tubing to the drain fitting.
The debubbler must drain to atmosphere.
WARNING
High pressure and temperature
Before removing the sensor, be absolutely certain that the process pressure is
reduced to 0 psig and the process temperature is lowered to a safe level!
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CAUTION
Reading errors
During operation, the debubbler is under pressure. A 0.040 in. (1 mm) orifice in the
outlet provides the pressure. Back pressure helps prevent outgassing, which can
lead to bubbles accumulating on the sensor face, resulting in erroneous readings.
Do not exceed 30 psig (308 kPa abs) inlet pressure.
The amount of pressure in the debubbler can be estimated from the flow rate. See
Table 3-2.
Table 3-2: Approximate Debubbler Pressure as a Function of Flow (0.040 Inch
Outlet Orifice)
gph psig mL/min kPa abs
2 1 100 110
4 3 200 120
6 8 300 140
8 14 400 160
10 21 500 190
11 26 600 240
12 31 700 280
-- -- 800 340
To control and monitor sample flow, a valved rotameter with fittings is available
(PN 24103-00).
3. Attach the rotameter to the debubbler outlet.
You can also use the rotameter to increase back pressure on the debubbler if
additional pressure is needed to prevent outgassing.
Rosemount T1056 27
Install
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Reference Manual
3.4 Install sensor
Figure 3-10: Sensor
A. O-ring PN 9550145
B. Light source
C. Detector
Procedure
1. Unscrew the nut on the side of the debubbler.
2. Insert the sensor in the mouth of the measuring chamber.
Be sure the pin on the debubbler lines up with the hole in the sensor.
3. Replace the nut.
4. Remove the protective cap from the sensor.
5. Screw the cable onto the receptacle.
The plug and receptacle are keyed for proper alignment.
The sensor is rated to IP65 when properly connected to the cable.
Postrequisites
To prevent possible water damage to the connector contacts, be sure the cable receptacle
and the connector on the back of the sensor are dry when connecting or disconnecting the
cable.
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3.5 Sample point
Locate the sample tap to minimize pickup of sediment or air.
See Figure 3-11.
Figure 3-11: Sampling for Turbidity
If possible, install a sampling port that extends one or two inches (25-50 mm) into the
pipe. Use ¼-in. OD rigid plastic tubing. Avoid soft plastic tubing if possible. To reduce
sample lag time, install the debubbler and flow chamber as close to the sample tap as
possible.
Rosemount T1056 29
Install
July 2020 00809-0100-3560
Figure 3-12: Non Incendive Field Wiring Installation (CSA) 1056-27/37
Reference Manual
A. Sensor cable is shielded. Max cable length is 50 ft. (15.2 m).
B. Rosemount Clarity II Turbidity Sensor #2 (optional)
C. Rosemount Clarity II Turbidity Sensor #1 (optional)
D. Sensor cable is shielded. Max cable length is 50 ft. (15.2 m).
E. Unclassified area
F. Hazardous area
Class I, Div. 2 GPS A-D, 0 to 50 °C
Class II, III, Div. 2 GPS E-G
G. Metal conduit
H. Alarm wiring (Vac) optional
I. Analog output
J. Ground connection may be made in hazardous area.
K. Power supply
• For FM installation, refer to installation drawing number 1400324.
• For CSA installation, refer to installation drawing number 1400325.
WARNING
Flammable
Use with non-flammable process media only.
Note
• Installation must conform to the CEC.
• Seal required at each conduit entrance.
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• During installation, leave maximum amount of jacket insulation possible on N.I. field
wiring within instrument enclosure. After termination, wrap N.I. field wiring within
enclosure with mylar tape to ensure adequate double insulation remains.
Unless otherwise specified.
Figure 3-13: Non-Incendive Field Wiring Connection for Class 1, Division 1, Group D
Turbidity sensor board
Option -27/-37: turbidity
May only be used with a Rosemount Clarity II Turbidity Sensor.
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Wire
4 Wire
4.1 General wiring information
The transmitter is easy to wire.
It includes removable connectors and slide-out signal input boards.
4.1.1 Removable connectors and signal input boards
The transmitter uses removable signal input boards and communication boards for ease of
wiring and installation.
You can remove each of the signal boards either partially or completely from the enclosure
for wiring. The transmitter has three slots for placement of up to two signal input boards
and one communication board.
Slot 1 - left
Communication board Input board 1 Input board 2
4.1.2 Signal input boards
Slots 2 and 3 are for signal input measurement boards.
Procedure
1. Wire the sensor leads to the measurement board following the lead locations
marked on the board.
2. Carefully slide the wired board fully into the enclosure slot and take up the excess
sensor cable through the cable gland.
3. Tighten the cable gland nut to secure the cable and ensure a sealed enclosure.
4.1.3
Alarm relays
Emerson supplies four alarm relays with the switching power supply (85 to 264 Vac, 03
order code) and the 24 Vdc power supply (20 - 30 Vdc, 02 order code). You can use all
relays for process measurement(s) or temperature. You can also configure any relay as a
fault alarm instead of a process alarm. In addition, you may configure any relay
independently and program it to activate pumps or control valves.
All process alarms, alarm logic (high or low activation or USP*), and deadband are userprogrammable. Customer-defined failsafe operation is supported as a programmable
menu function to allow all relays to be energized or not energized as a default condition
upon powering the transmitter. You may program the USP* alarm to activate when the
conductivity is within a user-selectable percentage of the limit. USP* alarming is available
only when a contacting conductivity measurement board is installed.
Slot 2 - center Slot 3 - right
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4.2 Prepare conduit openings
The transmitter enclosure has six conduit openings. Four conduit openings are fitted with
conduit plugs.
Conduit openings accept ½-in. conduit fittings or PG 13.5 cable glands. To keep the case
watertight, block unused openings with NEMA® 4X or IP65 conduit plugs.
Note
Use watertight fittings and hubs that comply with the requirements of UL514B. Connect
the conduit hub to the conduit before attaching the fitting to the transmitter
(UL508-26 16).
4.3 Prepare sensor cable
The Rosemount T1056 is intended for use with all Rosemount sensors. Refer to the sensor
installation instructions for details on preparing sensor cables.
4.4 Power, output, and sensor connections
4.4.1 Power wiring
Emerson offers two power supplies for the Rosemount T1056:
1. 24 Vdc (20-30 V) power supply (02 ordering code)
2. 85-265 Vac switching power supply (03 ordering code)
AC mains (115 or 230 V) leads and 24 Vdc leads are wired to the power supply board which
is mounted vertically on the left side of the main enclosure cavity. Each lead location is
marked clearly on the power supply board. Wire the power leads to the power supply
board using the lead markings on the board.
Figure 4-1: 24 Vdc Power Supply (02 Ordering Code)
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4.4.2 Current output wiring
Emerson ships all instruments with two 4-20 mA current outputs. Wiring locations for the
outputs are on the main board which is mounted on the hinged door of the instrument.
Wire the output leads to the correct position on the main board using the lead markings
(+/positive, -/negative) on the board. Emerson provides male mating connectors with
each unit.
For best electromagnetic interference/radio freqency interference (EMI/RFI) protection
use shielded output signal cable enclosed in an earth-grounded metal conduit. Connect
the shield to earth ground. AC wiring should be 14 gauge or greater. Provide a switch or
breaker to disconnect the analyzer from the main power supply. Install the switch or
breaker near the analyzer and label it as the disconnecting device for the analyzer.
Keep sensor and output signal wiring separate from power wiring. Do not run sensor and
power wiring in the same conduit or together in a cable tray.
Figure 4-2: Current Output Wiring
4.4.3
Rosemount T1056 35
Alarm relay wiring
Emerson supplies four alarm relays with the switching power supply (85 to 265 Vac, 03
order code) and the 24 Vdc power supply (20-30 Vdc, 02 order code).
Wire the relay leads on each of the independent relays to the correct position on the
power supply board using the printed lead markings (NO/Normally open, NC/Normally
closed, or Com/Common) on the board. See Figure 4-3.
Wire Reference Manual
July 2020 00809-0100-3560
Figure 4-3: Alarm Relay Wiring for Rosemount 1056 Switching Power Supply (03
Order Code)
Table 4-1: Performance Specifications
NO1
Relay 1COM1
NC1
NO2
NC2
NO3
COM3
NC3
NO4
COM4
NC4
4.4.4 Sensor wiring to signal boards
Plug the pre-terminated sensor cable connector directly into the turbidity signal board
mating connector.
WARNING
Electrical shock
Relay 2COM2
Relay 3
Relay 4
Electrical installation must be in accordance with the National Electrical Code (ANSI/
NFPA-70) and/or any other applicable national or local codes.
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Wire
4.4.5 Wire sensor cable
The sensor cable is pre-wired to a plug that inserts into a receiving socket on the signal
board.
See Figure 4-4.
Figure 4-4: Turbidity Signal Board with Plug-in Sensor Connection
The cable also passes through a strain relief fitting. To install the cable:
Procedure
1. Remove the wrenching nut from the strain relief fitting.
2. Insert the plug through the hole in the bottom of the enclosure nearest the sensor
socket. Seat the fitting in the hole.
3. Slide the wrenching nut over the cable plug and screw it onto the fitting.
4. Loosen the cable nut so the cable slides easily.
5. Insert the plug into the appropriate receptacle. To remove the plug, squeeze the
release clip and pull straight out.
6. Adjust the cable slack in the enclosure and tighten the cable nut.
Be sure to allow sufficient slack to avoid placing stress on the cable and
connections.
7. Plug the cable into the back of the sensor.
The sensor is rated to IP65 when properly connected to the cable. To prevent
possible water damage to the connector contacts, be sure the cable receptacle and
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the connector on the back of the sensor are dry when connecting or disconnecting
the cable.
8. Place the sensor in either the measuring chamber or the calibration cup.
Important
The sensor must be in a dark place when power is first applied to transmitter.
Note
If S1 Warning appears, check sensor cable connection and confirm sample water
flow at debubbler drain outlet.
Important
When using EPA/incandescent sensors (P 8-0108-0002-EPA):
• Do not power up the instrument without the sensor connected.
• Do not disconnect and reconnect a sensor while a transmitter is powered.
If this is inconvenient or cannot be avoided:
• Cycle power to the instrument after connecting to the sensor or
• Perform a slope calibration or standard calibration routine after connecting the sensor.
Following these guidelines will extend the life of the incandescent lamp and avoid
premature warnings and faults due to reduced lamp life.
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Figure 4-5: Power Wiring for Rosemount 1056 85-265 Vac Power Supply (03 Ordering
Code)
A. To main board
B. Earth ground
C. Neutral
D. Line
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Figure 4-6: Power Wiring for Rosemount 1056 254 Vdc Power supply (02 Ordering
Code)
A. To main PCB
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Figure 4-7: Output Wiring for Rosemount 1056 Main PCB
A. To power supply PCB
B. Analog output 1
C. Analog output 2
D. To digital I/O PCB
E. To sensor 1 PCB
F. To sensor 2 PCB
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5 Display and operation
5.1 User interface
The Rosemount 1056 has a large display which shows two live measurement readouts in
large digits and up to four additional process variables or diagnostic parameters
concurrently. The display is back-lit, and the you can customize the format to meet your
requirements. The intuitive menu system allows access to Calibration, Hold (of current
outputs), Programming, and Display functions by pressing MENU. In addition, a dedicated
DIAGNOSTIC button is available to provide access to useful operational information on
installed sensor(s) and any problematic conditions that might occur. The display flashes
Fault and/or Warning when these conditions occur. Help screens are displayed for most
fault and warning conditions to guide you in troubleshooting. During calibration and
programming, key presses cause different displays to appear.
5.2 Instrument keypad
There are four function keys and four selection keys on the instrument keypad.
Function keys
Four top-level menu items appear when you press MENU.
• Calibrate: Calibrate the attached sensor(s) and analog output(s).
• Hold: Suspend analog output(s).
• Program: Program outputs, measurement, temperature, security, and reset.
• Display: Program display format, language, warnings, and contrast.
Press MENU to display the Main Menu screen. Press MENU followed by EXIT to display the
main display.
Press the DIAG key to display active Faults and Warnings and detailed instrument
information and sensor diagnostics, including: faults, warnings, Sensor 1 and 2
information, Out 1 and Out 2 live current values, instrument software version, and AC
frequency used.
Press ENTER on Sensor 1 or Sensor 2 to display useful diagnostics and information (as
applicable): Measurement, Sensor type, Raw signal value, Cell constant, Zero offset,
Temperature, Temperature offset, Selected measurement range, Cable resistance,
Temperature sensor resistance, and Signal board software version.
Press ENTER to store numbers and settings and move the display to the next screen.
Press EXIT to return to the previous screen without storing changes.
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Selection keys
Surrounding the ENTER key, four selection keys - Up, Down, Right, and Left - move the
cursor to all areas of the screen while using the menus.
Selection keys are used to:
1. Select items on the menu screens.
2. Scroll up and down the menu lists.
3. Enter or edit numeric values.
4. Move the cursor to the right or left.
5. Select measurement units during operation.
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5.3 Main display
The Rosemount 1056 displays one or two primary measurement values, up to four
secondary measurement values, a fault and warning banner, alarm relay flags, and a digital
communications icon.
Process measurements
Two process variables are displayed if two signal boards are installed. One process variable
and process temperature is displayed if one signal board is installed with one sensor. The
Upper display area shows the Sensor 1 process reading. The Center display area shows the
Sensor 2 process reading.
For single input configurations, the Upper display area shows the live process variable.
Secondary values
Up to four secondary values are shown in four display quadrants at the bottom half of the
screen. You can program all four secondary value positions to any display parameter
available. Possible secondary values include:
• Slope 1
• Ref Off 1
• GI Imp 1
• Ref Imp 1
• Raw
• mV Input
• Temp 1
• Man Temp 1
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• Man Temp 2
• Output 1 mA
• Output 2 mA
• Output 1%
• Output 2%
• Measure 1
• Blank
Fault and Warning banner
If the transmitter detects a problem with itself or the sensor, the word Fault or Warning
appears at the bottom of the display. A fault requires immediate attention. A warning
indicates a problematic condition or impending failure. For troubleshooting assistance,
press DIAG.
Formatting the main display
You can program the main display screen to show primary process variables, secondary
process variables, and diagnostics.
1. Press MENU.
2. Scroll down to Display. Press ENTER.
3. Main Format is highlighted. Press ENTER.
4. The sensor 1 process value is highlighted in reverse video. Press the selection keys
to navigate down to the screen sections you wish to program. Press ENTER.
5. Choose the desired display parameter or diagnostic for each of the four display
sections in the lower screen.
6. Continue to navigate and program all desired screen sections. Press MENU and
EXIT. The screen returns to the main display.
For single sensor configurations, the default display shows the live process measurement
in the upper display area and temperature in the lower display area. You can elect to
disable the display of temperature in the center display area using the Main Format
function. See Figure 5-1 to guide you through programming the main display to select
process parameters and diagnostics of your choice.
For dual sensor configurations, the default display shows Sensor 1 live process
measurement in the upper display area and Sensor 2 live process measurement
temperature in the center display area. See Figure 5-1 to guide you through programming
the main display to select process parameters and diagnostics of your choice.
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5.4 Menu system
The Rosemount 1056 uses a scroll and select menu system. Press the MENU key at any
time to open the top-level menu, including Calibrate, Hold, Program, and Display
functions.
To find a menu item, scroll with the Up and Down keys until the item is highlighted.
Continue to scroll and select menu items until the desired function is chosen. To select the
menu item, press ENTER. To return to a previous menu level or to enable the main live
display, press EXIT repeatedly. To return immediately to the main display from any menu
level, simply press MENU and then EXIT.
The selection keys have the following functions:
• The Up key (above ENTER) increments numerical values, moves the decimal point one
place to the right, or selects units of measurement.
• The Down key (below ENTER) decrements numerical values, moves the decimal point
one place to the left, or selects units of measurement.
• The Left key (left of ENTER) moves the cursor to the left.
• The Right key (right of ENTER) moves the cursor to the right.
To access desired menu functions, use Figure 1-2. During all menu displays (except main
display format and Quick Start), the live process measurements and secondary
measurement values are displayed in the top two lines of the upper display area. This
conveniently allows display of the live values during important calibration and
programming operations.
Menu screens time out after two minutes and return to the main display.
Rosemount T1056 47
Main
Menu
Display
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Display
Main Format
Language: English
Warning: Enable
Contrast: Lighter
-1.234
-56.78
123.4 °C 12.34 mA
123.4 °C 12.34 mA
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Upper
---
---
---
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Center
---
---
---
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Right
---
---
---
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Left
---
---
---
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Lower Left
---
---
---
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Lower Right
---
---
---
Display and operation Reference Manual
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Figure 5-1: Formatting the Main Display
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5.5 Using hold
5.5.1 Putting sensor in hold
To prevent unwanted alarms and improper operation of control systems or dosing pumps,
place the alarms and outputs assigned to the sensor in hold before removing it for
maintenance.
During hold, outputs assigned to the sensor remain at the last value, and alarms assigned
to the sensor remain in their present state.
Once in hold, the sensor remains in hold until hold is turned off. However, if power is loss
than restored, hold is automatically turned off.
5.5.2
Using the hold function
To put the transmitter in hold, complete the following steps.
Procedure
1. Press MENU.
The main Menu screen appears.
2. Select Hold.
The screen shows the current hold status for each sensor.
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3. Select the sensor to be put in hold. Press ENTER.
4. To put the sensor in hold, select Yes. To take the sensor out of hold, select No.
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6 Programming the transmitter
6.1 General programming information
This chapter describes the following programming functions
• Change the measurement type, measurement units, and temperature units.
• Choose temperature units and manual or automatic temperature compensation
mode.
• Configure and assign values to the current outputs.
• Set a security code for two levels of security access.
• Access menu functions using a security code.
• Enable and disable Hold mode for current outputs.
• Choose the frequency of the AC power (needed for optimum noise rejection).
• Reset all factory defaults, calibration data only, or current output settings only.
6.2 Changing start-up settings
6.2.1 Purpose of changing start-up settings
To change the measurement type, measurement units, or temperature units that were
initially entered in Quick Start, choose the Reset analyzer function (Resetting factory
default settings) or access the Program menus for sensor 1 or sensor 2 (Programming
turbidity). The following choices for specific measurement type and measurement units
are available for each sensor measurement board.
6.2.2
Change start-up settings
Follow the Reset Analyzer procedure (Reset factory default setting) to reconfigure the
transmitter to display new measurements or measurement units. To change the specific
measurement or measurement units for each signal board type, refer to the Program
menu for the appropriate measurement (Programming turbidity).
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6.3 Configuring and ranging the current outputs
6.3.1 Purpose of configuration
The Rosemount 1056 accepts inputs from two sensors and has two analog current
outputs. Ranging the outputs means assigning values to the low (0 or 4 mA) and high
(20 mA) outputs. This section provides a guide for configuring and ranging the outputs.
Important
Always configure the outputs first.
6.3.2 Definitions for outputs
Current
outputs
Assigning
outputs
Dampen
Mode
The transmitter provides a continuous output current (4-20 mA or
0-20 mA) directly proportional to the process variable or temperature.
The low and high current outputs can be set to any value.
Assign a measurement to Output 1 or Output 2.
Output dampening smooths out noisy readings. It also increases the
response time of the output. Output dampening does not affect the
response time of the display.
You can make the current output directly proportional to the displayed
value (linear mode) or directly proportional to the common logarithm of
the displayed value (log mode).
6.3.3 Configure outputs
Under the Program/Outputs menu, the screen below appears to allow configuration of the
outputs. Follow the menu screens in Figure 6-1 to configure the outputs.
52 Emerson.com/Rosemount
Main
Menu
Display
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Program
Outputs
Measurement
Temperature
---------------------------------------Security
Diagnostic Setup
Ambient AC Power:Unk
Reset Analyzer
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Outputs
Range
Configure
Simulate
Range
Configure
Simulate
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Output range
OM SN 4mA: 0.000
OM SN 20mA: 20.00
OM SN 4mA: 0.00pH OM
SN 20mA: 14.00pH
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Output range
OM 4mA: 1.000 Ratio
OM 20mA: 1.000% Pass
OM 4mA: 1.000%
OM 20mA: 7.00 pH/Calc
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Output Configure
Output 1
Output 2
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
OutputM Configure
Assign: S1 Meas
Range: 4-20mA
Scale: Linear
Dampening: 0sec
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
OutputM Assign
S1 Measurement
S1 Temperature
S2 Measurement
S2 Temperature
----------------------------------------------Ratio
% Rejection
% Passage
pH Calc
% Recovery
Difference
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
OutputM Range
4-20mA
0-20mA
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Scale
Linear
Log
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Simulate
Output 1
Output 2
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
OutputN Hold At
12.00mA
Reference Manual Programming the transmitter
00809-0100-3560 July 2020
Figure 6-1: Configure and Range the Current Outputs
6.3.4 Assign the low and high current output measurements
The screen below appears when entering the Assign function under Program → Output
→ Configure. These screens allow you to assign a measurement, process value, or
temperature input to each output. Follow the menu screens in Figure 6-1 to assign
measurements to the outputs.
6.3.5
Range current outputs
The screen below appears under Program → Output → Range. Enter a value for 4 mA and
20 mA (or 0 mA and 20 mA) for each output. Follow the menu screens in Figure 6-1 to
assign values to the outputs.
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6.4 Setting a security code
6.4.1 Security codes
The security codes prevent accidental or unwanted changes to program settings, displays,
and calibration. The Rosemount 1056 has two levels of security code to control access and
use of the instrument to different types of users. The two levels of security are:
• All: This is the supervisory security level. It allows access to all menu functions,
including Programming, Calibration, Hold, and Display.
6.4.2
• Calibration/Hold: This is the operator or technician level. It allows access to only
calibration and hold of the current outputs.
Set security code
Procedure
1. Press MENU.
The Main menu screen appears.
2. Select Program.
3. Select Security.
The Security entry screen appears.
4. Enter a three digit security code for each of the desired security levels.
The security code takes effect two minutes after the last key stroke.
5. Record the security codes for future access and communication to operators or
technicians as needed.
The display returns to the Security menu screen. Press EXIT to return to the previous
screen. To return to the main display, press MENU followed by EXIT.
Figure 6-2 displays the security code screens.
54 Emerson.com/Rosemount
Main
Menu
Display
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Program
Outputs
Measurement
Temperature
---------------------------------------Security
Diagnostic Setup
Ambient AC Power:Unk
Reset Analyzer
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Security
Calibration/Hold: 000
All: 000
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Security Code
000
Reference Manual Programming the transmitter
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Figure 6-2: Setting a Security Code
6.5 Security access
6.5.1 How the security code works
To access the Calibration and Hold menus, enter the correct access code for the
Calibration/Hold security level. This allows operators or technicians to perform routine
maintenance. This does not allow access to the Program or Display menus.
To access all menu functions, including programming, calibration, hold, and display, enter
the correct access code for the All security level.
6.5.2
Enter security code
Procedure
1. If a security code has been programmed, select the Calibrate, Hold, Program, or
Display top menu item to display the Security access screen.
2. Enter the three-digit security code for the appropriate security level:
If the entry is correct, the appropriate menu screen appears. If the entry is incorrrect, the
Invalid Code screen appears. The Enter Security Code screen reappears after two seconds.
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6.6 Using hold
6.6.1 Putting sensor in hold
To prevent unwanted alarms and improper operation of control systems or dosing pumps,
place the alarms and outputs assigned to the sensor in hold before removing it for
maintenance.
During hold, outputs assigned to the sensor remain at the last value, and alarms assigned
to the sensor remain in their present state.
Once in hold, the sensor remains in hold until hold is turned off. However, if power is loss
than restored, hold is automatically turned off.
6.6.2
Use the Hold function
To hold the outputs:
Procedure
1. Press MENU.
The Main menu screen appears.
2. Select Hold.
The Hold Outputs and Alarms? screen appears.
3. Select Yes to place the transmitter in hold. Select No to take the transmitter out of
hold.
Note
There are no alarm relays with this configuration. Current outputs are included with
all configurations.
The Hold screen appears.
Important
Hold remains on indefinitely until Hold is disabled.
See Figure 6-3 below.
56 Emerson.com/Rosemount
Main
Menu
Display
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Hold
S1 Hold: No
S2 Hold: No
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
S1 Hold outputs and alarms?
No
Yes
Reference Manual Programming the transmitter
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Figure 6-3: Using Hold
6.7 Reset factory default setting
This section describes how to restore factory calibration and default values. The process
also clears all fault messages and returns the display to the first Quick Start screen. The
Rosemount 1056 offers three options for resetting factory defaults.
1. Reset all settings to factory defaults.
2. Reset sensor calibration data only.
3. Reset analog output settings only.
To reset to factory defaults, reset calibration data only, or reset analog outputs only,
follow the flow diagram below.
Rosemount T1056 57
Main
Menu
Program
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Program
Outputs
Measurement
Temperature
---------------------------------------Security
Diagnostic Setup
Ambient AC Power:Unk
Reset Analyzer
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Reset Analyzer
Factory Defaults
Sensor Cal Only
Analog Out Only
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Factory Defaults
Yes
No
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Sensor Cal Only
Sensor 1
Sensor 2
Sensor 1 and 2
S1: 1.234 µS/cm 25.0 °C
S2: 12.34 pH 25.0 °C
Analog Out Only
Output 1
Output 2
Output 1 and 2
Programming the transmitter Reference Manual
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Figure 6-4: Resetting Factory Default Settings
6.8 Programming alarm relays
6.8.1 Purpose of programming relays
The Rosemount 1056 24 Vdc (-02 order code) and the AC switching power supply (-03
order code) provide four alarm relays for process measurement or temperature. Each
alarm can be configured as a fault alarm instead of a process alarm. Also, each relay can be
programmed independently, and each can be programmed as an interval timer. This
section desribes how to configure alarm relays, simulate relay activation, and synchronize
timers for the four alarm relays. This section provides details on programming the
following alarm features:
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Section Alarm relay feature Default Description
Enter setpoints Enter setpoint 100.00 µS/cm Enter alarm trigger value.
Assign alarm relays Assign measurement S1 Measure Select alarm assignment.
Set relay logic Set relay logic High Program relay to activate at
High or Low reading.
Program the deadband Deadband 0.00 µS/cm Program the change in
process value after the relay
deactivates.
Define failsafe conditions Normal state Open Program relay default
condition as open or closed
for failsafe operation.
Set interval time Interval time 24.0 hr Time in hours between relay
activations
Set relay on-time On-time 10 min Enter the time in seconds
that the relay is activated.
Set recovery time Recover time 60 sec Enter time after the relay
deactivation for process
recovery.
Program Hold while active
feature
Select alarms to simulate Simulate N/A Manually simulate alarms to
Synchronize timers Synchronize timers Yes Control the timing of two or
Hold while active S1 Holds current outputs
during relay activation.
confirm relay operation.
more relay timers set as
Interval timers.
Under the Programs/Alarms menu, this screen appears to allow configuration of the
alarm relays.
Follow the menu screens in Figure 6-1 to configure the outputs.
The screen below appears to allow you to select a specific alarm relay. Select the desired
alarm and press ENTER.
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The screen below appears next to allow you to completely program each alarm. Factory
defaults are displayed as they would appear for an installed contacting conductivity board.
USP Safety only appears if alarm logic is set to USP. Interval time, On Time, Recover
Time, and Hold while active only appear if the alarm is configured as an interval timer.
6.8.2
60 Emerson.com/Rosemount
Enter setpoints
Under the Program/Alarms menu, the screen below appears to allow you to configure the
alarm relays.
Enter the desired value for the process measurement or temperature at which to activate
an alarm event.
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6.8.3 Assign alarm relays
Under the Alarms Settings menu, the screen below appears to allow you to assign the alarm
relays.
Select an alarm assignment.
6.8.4 Set relay logic
6.8.5
Under the Alarms Settings menu, the screen below appears to set the alarm logic. Select
the desired relay logic to activate alarms at a high reading or a low reading. USP only
appears if a contacting conductivity board is installed.
Program the deadband
Under the Alarms Settings menu, the screen below appears to allow you to program the
deadband as a measurement value.
Enter the change in the process value needed after the relay deactivates to return to
normal (thereby preventing repeated alarm activation).
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6.8.6 Define failsafe conditions
You can define failsafe conditions in software by programming the alarm default state to
normally open or normally closed upon power up.
To display this alarm configuration item, enter the Expert menus by holding down EXIT for
six seconds while in the main display mode. When the screen displays Enable Expert
Menu? select Yes.
Under the Alarms Settings menu, the screen below appears to set the normal state of the
alarms. Select the alarm condition you want each time the transmitter powers up.
6.8.7 Set interval time
Under the Alarms Settings menu, the screen below appears to allow you to set the interval
time.
Enter the fixed time in hours between relay activations.
6.8.8
Set relay on-time
Under the Alarm Settings menu, the screen below appears to allow you to set the relay ontime.
Enter the time in seconds that you want the relay to be activated for.
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6.8.9 Set recovery time
Under the Alarms Settings menu, the screen below appears to allow you to set the relay
recovery time.
Enter time for process recovery after the relay deactivation.
6.8.10
6.8.11
Program Hold while active feature
Under the Alarms Settings menu, the screen below appears to allow you to program the
feature that holds the current outputs while alarms are active.
Select whether or not to hold the current outputs for Sensor 1, Sensor 2, or both sensors
while the relay is activated.
Select alarms to simulate
You can manually set alarm relays to check devices, such as valves or pumps.
Under the Alarms Settings menu, the screen below appears to allow you to set manual
forced activation of the alarm relays. Select the desired alarm condition to simulate.
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6.8.12 Synchronize timers
Under the Alarms Settings menu, the screen below appears to allow you to synchronize
alarms that are set to interval timers.
Select Yes or No to synchronize two or more timers.
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7 Programming turbidity
7.1 Introduction to programming measurements
The Rosemount 1056 automatically recognizes each installed measurement board upon
first power-up and each time the transmitter is powered. Completing Quick Start screens
upon first power-up enables measurements, but you may have to take additional steps to
program the transmitter for the desired measurement application. This section covers the
following programming and configuration functions:
1. Select measurement type or sensor type (all sections).
2. Define measurement display units (all sections).
3. Adjust the input filter to control display and output reading variability or noise (all
sections).
4. Enter TSS data.
5. Information on bubble rejection algorithm.
To fully configure the transmitter for each installed measurement board, you may use the
following:
1. Reset Analyzer function to reset factory defaults and configure the measurement
board to the desired measurement. Follow the Reset Analyzer menu to reconfigure
the transmitter to display new measurements or measurement units.
2. Program menus to adust any of the programmable configuration items. Use the
following configuration and programming guidelines for the applicable
measurement.
7.2 Programming turbidity measurements
The following programming and configuration functions are covered.
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Table 7-1: Turbidity Measurement Programming
Measure Section Menu function Default Description
Turbidity Measurement Measurement type Turbidity Select Turbidity or TSS
calculation (estimated
TSS).
Units Measurement units NTU NTU, FTU, FNU.
Enter total suspended
solids (TSS) data
Filter Filter 20 sec Override the default
Bubble rejection Bubble rejection On Intelligent software
Enter total suspended
solids (TSS) data
Enter TSS and NTU
data to calculate TSS
based on turbidity.
input filter; enter
0-999 seconds.
algorithm to eliminate
erroneous readings
caused by bubble
accumulation in the
sample.
A detailed flow diagram for turbidity programming is provided below to guide you
through all basic programming and configuration functions.
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Figure 7-1: Configure Turbidity Measurement
To configure the turbidity measurement board:
1. Press MENU.
2. Scroll down to Program. Press ENTER.
3. Scroll down to Measurement. Press ENTER.
4. Select Sensor 1 or Sensor 2 corresponding to turbidity. Press ENTER.
The following screen format appears (factory defaults are shown).
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5. To program turbidity, scroll to the desired item and press ENTER.
Measurement through Bubble rejection provide you with the initial display screen that
appears for each programming routine. Use Figure 7-1 for turbidity programming and the
live screen prompts to complete programming.
7.2.1
7.2.2
Measurement
The display screen for selecting the measurement is shown below. The default
measurement is displayed in bold type.
Refer to Figure 7-1 to complete this function.
Units
The display screen for selecting the measurement units is shown below. The default value
is displayed in bold type.
Refer to Figure 7-1 to complete this function. If TSS (total suspended solids) calculation is
selected, the following screen is displayed.
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7.2.3 Enter total suspended solids (TSS) data
The display screen for entering TSS data is shown below. The default values are displayed.
Refer to Figure 7-1 to complete this function.
Note
Based on user-entered NTU data, calculating TSS as a straight line curve could cause TSS to
go below zero. The following screen lets you know that TSS becomes zero below a certain
NTU value.
The following illustration shows the potential for calculated TSS to go below zero.
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Figure 7-2: Potential for TSS to go below Zero
A. TSS
B. Normal case: TSS is always a positive number when turbidity is a positive number.
C. Turbidity
D. Abnormal case: TSS can be a negative number when turbidity is a positive number.
When the TSS data entry is complete, press ENTER. The display confirms the
determination of a TSS straight line curve fit to the entered NTU/turbidity data by
displaying the following screen:
The following screen may appear if TSS calculation is unsuccessful. You must re-enter NTU
and TSS data.
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7.2.4 Filter
The display screen for entering the input filter value in seconds is shown below. The
default value is displayed in bold type.
Refer to Figure 7-1 to complete this function.
7.2.5
Bubble rejection
Bubble rejection is an internal software algorithm that characterizes turbidity readings as
bubbles as opposed to true turbidity of the sample. With bubble rejection enabled, these
erroneous readings are eliminated from the live measurements shown on the display and
transmitted via the current outputs.
The default setting is displayed in bold type. Refer to Figure 7-1 to complete this function.
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7.3 Choosing turbidity or total suspended solids
7.3.1 Configuring the transmitter
This section describes how to do the following:
1. Configure the transmitter to display results as turbidity or total suspended solids
(TSS).
2. Choose units in which results are to be displayed.
3. Select a time period for signal averaging.
4. Enable or disable bubble rejection software.
7.3.2
Definitions
Turbidity
Turbidity is a measure of the amount of light scattered by particles in a sample. Figure 7-3
illustrates how turbidity is measured. A beam of light passes through a sample containing
suspended particles. The particles interact with the light and scatter it in all directions.
Although the drawing implies scattering is equal in all directions, this is generally not the
case. For particles bigger than about 1/10 the wavelength of light, scattering is highly
directional. A detector measures the intensity of scattered light.
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Figure 7-3: Turbidity Sensor - General
A. Light scattered in all directions by particle
B. Interrogating beam
C. Scattered light at 90 °
D. Detector
E. Light source
Measured turbidity is dependent on instrumental conditions. In an attempt to allow
turbidities measured by different instruments to be compared, two standards for turbidity
measurements have evolved. USEPA established Method 180.1, and the International
Standards Organization established ISO 7027. EPA Method 180.1 must be used for
reporting purposes in the United States. Figure 7-4 shows an EPA 180.1 turbidmeter.
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Figure 7-4: Turbidity Sensor - EPA 180.1
A. Interrogating beam
B. Particle
C. Detector
D. Optical filter
E. Light source
F. Collimator
Figure 7-5 shows an ISO 7027 turbidmeter.
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Figure 7-5: Turbidity Sensor - ISO 7027
A. Interrogating beam
B. Particle
C. Detector
D. Light source
EPA Method 180.1 requires that:
1. The light source must be a tungsten lamp operated with a filament temperature
between 2200 and 2700 K.
2. The detector must have an optimum response between 400 and 600 nm
(approximates the human eye).
3. The scattered light must be measured at 90 ° ± 30 ° with respect to the incident
beam.
4. The total path length of the light through the sample must be less than 3.9 in.
(10 cm).
Requirements 1 and 2 essentially restrict the measurement to visible light. Although most
of the energy radiated by an incandescent lamp is in the near infrared, keeping the
filament temperature between 2200 and 2700 K ensures that at least some energy is
available in the visible range. Further specifying that the detector and filter combination
have maximum sensitivity between 400 nm (violet light) and 600 nm (orange light)
cements the measurement in a visible range. Wavelength is important because particles
scatter light most efficiently if their size is approximately equal to the wavelength of light
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used in the measurement. The longer the wavelength, the more sensitive the
measurement is to larger diameter particles and the less sensitive it is to smaller particles.
Requirement 3 is arbitrary. The light scattered by a particle depends on the shape and size
of the particle, the wavelength used for the measurement, and the angle of observation.
Choosing 90 ° avoids the difficulties of having to integrate the scattered light over all the
scattering angles. An arbitrary observation angle works so long as the sample turbidity is
referred to the turbidity of a standard solution measured at the same angle. A turbidmeter
that measures light at 90 ° is called a nephelometer.
Requirement 4 has a lot to do with the linearity of the sensor. As Figure 7-4 and Figure 7-5
show, particles lying between the measurement zone and the detector can scatter the
scattered radiation. This secondary scattering reduces the amount of light striking the
detector. The result is a decrease in the expected turbidity value and a decrease in
linearity. The greater the amount of secondary scattering, the greater the non-linearity.
Particles in the area between the source and measurement zone also reduce linearity.
ISO 7027 requirements are somewhat different from EPA requirements. ISO 7027 requires
that:
1. The wavelength of the interrogating light must be between 860 ± 60 nm or for
colorless samples, 550 ± 30 nm.
2. The measuring angle must be 90 ° ± 2.5 °.
ISO 7027 does not restrict the maximum light path length through the sample. ISO 7027
calls out beam geometry and aperture requirements that EPa 180.1 does not address.
Although ISO 7027 allows a laser, light emitting diode (LED), or tungsten filament lamp
fitted with an interference filter as the light source, most instruments, including the
Rosemount Clarity II, use an 860 nm LED. Because ISO 7027 turbidmeters use a longer
wavelength for measurement, they tend to be more sensitive to larger particles than EPA
180.1 turbidmeters. Turbidities measured using the EPA and ISO methods will be
different.
Total suspended solids (TSS)
TSS is a measure of the total mass of particles in a sample. It is determined by filtering a
volume of the sample and weighing the mass of dried residue retained in the filter.
Because turbidity arises from suspended particles in water, turbidity can be used as an
alternative way of measuring total suspended solids (TSS). The relationship between
turbidity and TSS is wholly empirical and must be determined by the user.
Turbidity units
Turbidity is measured in nephelometric turbidity units (NTU), formazin turbidity units
(FTU), or formazin nephelometric units (FNU). Nephelometry means the scattered light is
measured at 90 ° to the interrogating beam. Formazin refers to the polymer suspension
typically used to calibrate turbidity sensors. The units - NTU, FTU, and FNU - are equivalent.
TSS units
The TSS value calculated from the turbidity measurement can be displayed in units of ppm
or mg/L. You can also choose to have no units displayed.
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Signal averaging
Signal averaging is a way of filtering noisy signals. Signal averaging reduces random
fluctuation in the signal but increases the response time to step changes. Recommended
signal averaging is 20 seconds. The reading takes 20 seconds to reach 63 percent of its
final value following a step change greater than the filter threshold.
Bubble rejection
When a bubble passes through a light beam, it reflects light onto the measuring
photodiode, causing a spike in turbidity. The Rosemount 1056 transmitter has proprietary
software that rejects the turbidity spikes caused by bubbles.
7.3.3 Select turbidity or total suspended solids (TSS)
To choose a menu item, move the cursor to the item and press ENTER. To store a number
or setting, press ENTER.
Procedure
1. Press MENU.
The Main menu screen appears.
2. Select Program.
3. Select Measurement.
4. Select Sensor 1 or Sensor 2.
For a single input configuration, the Sensor 1 Sensor 2 screen does not appear.
5. Select Turbidity or TSS.
6. Select the desired units.
For turbidity, select NTU (nephelometric turbidity units), FTU (formazin turbidity
units), or FNU (formazin nephelometric units)..
For TSS, select ppm, mg/L, or none.
7. Select Bubble Rejection.
8. Select On to enable bubble rejection software. Select Off to disable the software.
9. Press EXIT to return to the previous screen. To return to the main display, press
MENU and then EXIT.
7.4 Entering a turbidity to total suspended solids (TSS) conversion equation
7.4.1 Converting turbidity to total suspended solids (TSS)
You can program the transmitter to convert turbidity to a TSS reading. There is no
fundamental relationship between turbidity and TSS. Every process stream is unique. You
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must determine the relationship between turbidity and TSS for your process. The
transmitter accepts only a linear calibration curve.
To convert turbidity to TSS, enter two points, P1 and P2, and the transmitter calculates the
equation of a straight line between the points. The transmitter then converts all
subsequent measurements to TSS using the equation.
Important
If the cause or the source of the turbidity changes, you must determine new points, P1 and
P2, and the calibration must be repeated.
Figure 7-6: Converting Turbidity to TSS
P2 must be less than 200 nephelometric turbidity units (NTU).
TSS = m(NTU) = b
The accuracy of the measurement depends on how linear the actual relationship between
TSS and turbidity is. At a minimum, confirm linearity by diluting the most turbid sample
(P2) and verifying that the new turbidity and TSS points lie reasonably close to the line.
Ideally, do the dilutions with filtered sample, not deionized water. Deionized water can
change the index of refraction of the liquid and can increase or decrease the solubility of
particles. Therfore, the diluted sample will not be representative of the process liquid.
After the transmitter has calculated the turbidity to TSS conversion equation, it also
calculates the X-intercept (NTU). If the X-intercept is greater than zero, the transmitter
displays that value as the lowest turbidity reading it will accept. A lower turbidity reading
produces a negative TSS value. If the X-intercept is less than zero, the screen does not
appear.
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Figure 7-7: Lowest Turbidity (TSS)
7.4.2
A. Lowest turbidity
Create conversion equation
Complete the following steps to enter the total suspended soldis (TSS) and turbidity points
so that transmitter can create the conversion equation.
Prerequisites
First, calibrate the sensor. See Turbidity measurement programming, Choosing turbidity
or total suspended solids, or Converting turbidity to total suspended solids (TSS).
Procedure
1. Press MENU.
The Main menu appears.
2. Select Program.
3. Select Measurement.
4. Select Sen1 (sensor 1) or Sen2 (sensor 2).
5. Select Enter TSS Data.
6. Enter TSS for Pt1 (point 1). Press ENTER.
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7. Enter the turbidity for Pt1 (point 1). Press ENTER.
8. Enter the TSS for Pt2 (point 2). Press ENTER.
9. Enter the turbidity for Pt2 (point 2). Press ENTER.
10. If the calibration was unsuccessful, repeat Step 6 through Step 9, checking for data
entry errors.
If the intercept on the nephelometric turbidity units (NTU) axis is negative, the
transmitter displays the low turbidity limit.
Postrequisites
To return to the main display, press MENU and then EXIT.
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8 Calibrate
8.1 Introduction to calibration
Calibration is the process of adjusting or standardizing the transmitter to a lab test or a
calibrated laboratory instrument or standardizing to some known reference.
The transmitter's auto-recognition feature enables the appropriate calibration screens to
allow calibration for any single sensor configuration or dual sensor configuration of the
transmitter. Completing Quick Start upon first power-up enables live measurements but
does not ensure accurate readings in the lab or in process. Calibrate each attached sensor
to ensure accurate, repeatable readings.
8.2 Calibrating turbidity
8.2.1 Calibrate turbidity
This section describes how to calibrate the turbidity sensor against a user-prepared
standard as a 2-point calibration with deionized water, against a 20 nephelometric
turbidity unit (NTU) user-prepared standard as a single point calibration, and against a
grab sample using a reference turbidmeter.
The following calibration routines are covered.
Table 8-1: Turbidity Calibration Routines
Section Calibration function Description
Calibrate slope Slope calibration Slope calibration with pure water and
a standard of known turbidity.
Calibrate against a standard Standardize calibration Standardize the sensor to known
turbidity.
Calibrate against a grab sample Grab calibration Standardize the sensor to a known
turbidity based on a reference
turbidmeter.
A detailed flow diagram is provided below to guide you through the calibration routines.
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Figure 8-1: Calibrate Turbidity
To calibrate turbidity:
Procedure
1. Press MENU.
2. Select Calibrate. Press ENTER.
3. Select Sensor 1 or Sensor 2 corresponding to turbidity. Press ENTER.
4. Select Turbidity. Press ENTER.
The following screen appears.
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Postrequisites
The following sections show the intial display screen that appears for each calibration
routine. Use Figure 8-1 and the live screen prompts to complete calibration.
8.2.2 Calibrate slope
Conduct a two-point calibration of the turbidity sensor against a user-prepared
nephelometric turbidity unit (NTU) standard.
Procedure
1. Immerse the sensor in filtered water having very low turbidity and measure the
sensor output.
2. On the Rosemount 1056 transmitter, select Slope Calibration.
This screen appears.
3. Enter the sensor output. Press ENTER.
4. Increase the turbidity of the filtered water by a known amount, typically 20 NTU,
and measure the sensor output again.
The transmitter takes the two measurements, applies a linear correction (if
necessary), and calculates the sensitivity.
Sensitivity is the sensor output (in mV) divided by turbidity. A typical new sensor has a
turbidity of about 10 mV/NTU. As the sensor ages, the sensitivity decreases. Dark current
is the signal generated by the detector when no light is falling on it. The transmitter
substracts the dark current from the raw scattered light signal and converts the result to
turbidity. In highly filtered samples, which scatter little light, the dark current can be a
substantial amount of the signal generated by the detector.
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Figure 8-2: Turbidity in Filtered Water
A. Filtered water + 20.0 NTU
B. Filtered water
Example
The following screen appears if the slope calibration is successful.
The screen returns to the Turbidity Cal menu.
Example
The following screen may appear if slope calibration is unsuccessful.
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Calibrate
8.2.3 Calibrate against a standard
You can calibrate the turbidity sensor against a commercial standard.
Stable 20.0 nephelometric turbidity unit (NTU) standards are available from a number of
sources. Calibration using a commercial standard is simple. Filtered deionized water is not
required.
Prerequisites
Before beginning the calibration, the transmitter does a dark current measurement. Dark
current is the signal generated by the detector even when no light is falling on it.
Procedure
1. Select Standard Calibration.
The following screen appears.
2. Press ENTER.
The transmitter subtracts the dark current from the raw scattered light signal and
converts the result to turbidity. In highly filtered samples, which scatter little light,
the dark current can be a substantial amount of the signal generated by the sensor.
Example
The following screen appears if standard calibration is successful.
The screen returns to the Turbidity Cal menu.
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Example
The following screen may appear if standard calibration is unsuccessful.
8.2.4 Calibrate against a grab sample
If you want, you can calibrate the turbidity sensor against the turbidity reading from
another instrument.
The transmitter treats the value you entered as though it were the true turbidity of the
sample. Therefore, grab sample calibration changes the sensitivity; it does not apply an
offset to the reading.
This screen appears after you select Grab calibration
.
The following screen appears if grab calibration is successful.
The screen returns to the Turbidity Cal menu.
The following screen may appear if grab calibration is unsuccessful.
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Maintenance
9 Maintenance
9.1 Maintaining the transmitter
The Rosemount 1056 transmitter used with the Rosemount T1056 Turbidmeter requires
little routine maintenance.
Clean the transmitter case and front panel by wiping with a clean soft cloth dampened
with water only. Do not use solvents, like alcohol, that might cause a buildup of static
charge.
WARNING
Explosion
Do not disconnect equipment when a flammable or combustible atmosphere is present.
Table 9-1: Replacement Parts for Rosemount 1056
PN Description Shipping weight
23823-00 Panel mounting kit, includes
34059-00 Gasket, for panel mounting 1 lb. / 0.5 kg
34062-00 Gasket, internal for enclosure 1 lb. / 0.5 kg
24230-00 Hole plug and gland fittings 2 lb. / 1.0 kg
Note
Shipping weights are rounded up to the nearest whole lb. or 0.5 kg.
9.2 Clean the sensor
Clean the sensor by rinsing it thoroughly with water and then wiping it with a soft tissue. If
water is inadequate, wash with a mild detergent solution and then thoroughly rinse it with
water.
CAUTION
Equipment damage
Do not scratch the lamp or photodiode windows.
Do not use abrasive cleaners or solvents.
2 lb. / 1.0 kg
four brackets and four set
screws
If mineral scale is present, apply a dilute acid solution with a cotton swab to clean away the
deposit. Rinse thoroughly with water.
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9.3 Replace the lamp/light-emitting diode (LED) board
The US EPA-compliant sensor uses a tungsten filament lamp (PN 1-0901-0004-EPA) as the
light source. The lamp has an expected life of about one year. The ISO-compliant version
uses an infrared LED (PN 1-0901-0005-ISO). Its expected life is five years. The transmitter
continuously monitors the source intensity and corrects for changes in source intensity
caused by age. When the source intensity becomes too low, the transmitter warns you.
Replace the lamp as soon as possible.
To replace the lamp/LED board:
Procedure
1. Turn off power to the transmitter.
WARNING
Explosion
Do not disconnect equipment when a flammable or combustible atmosphere is
present.
2. Remove the sensor from the measuring chamber and disconnect the cable.
WARNING
High pressure and temperature
Before removing the sensor, be absolutely certain that the process pressure is
reduced to 0 psig and the process temperature is at a safe level.
Note
If you have a dual input transmitter, you can reapply power at this point. The initial
reading from the other sensor will momentarily be zero. After about 60 seconds,
the reading will reach its final value.
3. Using a small Phillips screwdriver, remove the two screws holding the top flange of
the sensor to the body.
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4. Using a slight back and forth twisting motion, carefully pull the flange from the
sensor body.
CAUTION
Equipment damage
Wires are short. Pulling too hard will damage connections.
Don't pull too hard.
a. Don't pull too hard.
b. O-ring
5. Using your thumb and forefinger, remove the lamp/LED circuit board from the
sensor.
A. O-ring
B. Connecting wires
C. Lamp board
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6. Insert the replacement board in the sensor and push the socket on the replacement
board into the mating pins in the sensor.
CAUTION
Equipment damage
Keep wires pushed away from lamp board when replacing the flange.
A. Wires and flange
B. Mating pins
7. Place the dessicant package in the sensor body.
8. Orient the flange so that the screw holes line up with the holes in the sensor body.
Push the flange back on the sensor body and replace the screws.
Don't let wires push on lamp board. You may need to turn the flange a small
amount until the holes line up.
9. Place the sensor in the calibration cup and reconnect the cable.
10. Calibrate the sensor using either slope or standard calibration.
See Calibrate slope or Calibrate against a standard. Do not use grab calibration.
Failure to calibrate the sensor may reduce the life of the sensor.
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Maintenance
9.4 Maintaining the debubbler and measuring chamber
9.4.1 Clean the debubbler and measuring chamber
Procedure
1. Turn off the sample supply to the debubbler.
WARNING
High pressure and temperature
Before disconnecting the sample and drain lines or removing the sensor, be
absolutely certain the process pressure is reduced to 0 psig and the process
temperature is at a safe level.
2. Remove the sensor and put it in a safe place.
The calibration cup is a good place to store the sensor.
9.4.2
3. Loosen the small drain plug in the base plug and allow the sample in the debubbler
to drain out.
See Figure 9-1.
4. Replace the drain plug.
5. Unscrew the upper and lower caps.
Be careful not to lose the O-rings.
6. Use a stream of water, a brush, or a rag to flush and clean out the inside of the
debubbler and measuring chamber.
7. Inspect the O-rings for signs of damage and replace if necessary.
The part number for the O-ring (one each) is 9550316.
8. Replace the upper and lower caps.
9. Replace the sensor.
Clean the debubbler orifice
Procedure
1. Turn off the sample to the debubbler.
2. Disconnect the drain line. Unscrew the drain fitting from the orifice; then unscrew
the orifice from the debubbler body.
See Figure 9-1.
3. Use a stream of water to flush out any residue accumulated in the orifice. Direct the
stream of water counter to the normal flow through the orifice.
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4. If the material plugging the orifice cannot be removed with flushing, use a
toothpick or stiff wire to push out the obstruction. Push counter to the normal flow
through the orifice.
5. Reinstall the orifice and reconnect the drain line. Turn on the sample flow.
Postrequisites
If the blockage cannot be removed or the orifice is damaged during cleaning, replace the
orifice (PN 33947-00).
9.5 Replacement parts
Figure 9-1: Molded Debubbler Assembly
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Reference Manual Maintenance
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Location in Figure 9-1 Description Part number
--- Replacement lamp board assembly, ISO-compliant sensor 109010010ISO
--- Replacement sensor, USEPA-complaint 801080002EPA
--- Replacement sensor, ISO-compliant 801080003ISO
1 Debubbler housing 3401500
2 Upper cap for debubbler 3401400
3 Lower cap for debubbler 3401401
4 Sensor nut 3401402
5 Pipe plug, ¼-in. male national pipe thread (MNPT), 2 places 3000854
6 Orifice assembly 3394700
7 Sample inlet elbow, ¼-in. compression fitting x ¼-in. MNPT 9321010
8 Sample drain elbow, ⅜-in. barb x ¼-in. MNPT 9322036
9 O-ring, one each, for upper and lower caps 9550322
not shown O-ring, one each, for sensor 9550145
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Reference Manual Troubleshoot
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10 Troubleshoot
10.1 Troubleshooting overview
The Rosemount 1056 transmitter used in the Rosemount T1056 Turbidmeter
continuously monitors itself and the sensor for problems. When the transmitter identifies
a problem, the word warning or fault followed by s appears in the display alternately with
the measurement.
If alarm 3 was configured as a fault alarm and a fault has occurred, the relay will energize.
The outputs do not change during a fault or warning condition. They continue to reflect
the measured turbidity or total suspended solids (TSS) value.
To read fault and warning messages, go to the main display and press s. The analyzer
automatically scrolls through the messages and continues to scroll through the messages
for two minutes. After two minutes, the display returns to the default screen.
To stop the automatic scrolling and return to the main display, press EXIT.
Error messages are prefaced by the word fault or warning.
Faults are conditions requiring immediate attention. If the transmitter displays a fault,
regard its measurements as being in error.
Warnings are less serious than faults. A warning signifies the existence of a condition
requiring attention. The transmitter remains usable.
WARNING
Explosion
Do not disconnect equipment when a flammable or combustible atmosphere is present.
10.2 Troubleshooting using fault codes
Fault message Explanation Section
SN Lamp / LED Failure Lamp or light-emitting diode
(LED) is burned out.
EEPROM Failure Cannot save data to non-
volatile memory.
Factory Failure Needs factory calibration. Factory Failure
Lamp/LED Failure
EEPROM Failure
Warning message Explanation Section
SN Need Cal Lamp intensity is weak, but can
be improved by calibrating.
SN Weak Lamp Weak lamp; replace as soon as
possible.
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Need Cal
Weak Lamp
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Warning message Explanation Section
Reference Manual
SN Warning Poor sensor cable connection
SN identifies the sensor affected. S1 is sensor 1; S2 is sensor 2.
10.2.1 Lamp/LED Failure
The light source in a Rosemount T1056 Turbidmeter can be either a tungsten filament
lamp or a light-emitting diode (LED). US Environmental Protection Agency (EPA)compliant sensors use a tungsten lamp. International Standards Organization (ISO)compliant sensors use an LED. A photodiode inside the sensor continuously monitors the
intensity of the light source. The source intensity measurement is used to correct for
source drift, which allows the sensor to operate for longer periods without calibration. If
the signal from the photodiode drops below a certain value, the transmitter assumes the
light source has either failed completely or the intensity is too low to be useful. At this
point, the transmitter displays the Lamp Failure message.
Recommended actions
1. Replace the lamp or LED board.
2. After replacing the board, recalibrate the sensor using either slope or standard
calibration.
See Calibrate slope or Calibrate against a standard. Recalibration is necessary to
reset the lamp power supply. Grab calibration will not reset the power supply
and may result in significantly reduced lamp life.
SN Warning
or unusual ambient light
condition affecting sensor or
sensor not immersed.
10.2.2
10.2.3
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EEPROM Failure
EEPROM failure means the transmitter is unable to store data in the non-volatile memory.
If this happens and power is lost and then restored, all configurations and calibrations will
be lost.
Recommended action
Call the factory for assistance.
You will probably need to replace the transmitter.
Factory Failure
The factory calibrations have been corrupted.
Recommended action
Call the factory for assistance.
You will probably need to replace the transmitter.
Reference Manual Troubleshoot
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10.2.4 Need Cal
The Rosemount T1056 contains two photodiodes. One measures the intensity of the light
scattered by the sample. The other measures the intensity of the lamp. Because turbidity
is proportional to the intensity of light falling on the sample photodiode, any reduction of
the lamp intensity will be measured as a decrease in turbidity, even though the true
turbidity remains constant. The transmitter uses the lamp intensity measurement to
correct for changes in apparent turbidity caused by reduction of lamp intensity. However,
if the lamp intensity gets too low, the correction may not be valid. At this point, the
transmitter displays the Need Cal warning. Calibrating will cause the transmitter to
increase the current supplied to the lamp, thus increasing the lamp intensity.
Recommended action
Calibrate the sensor using slope (Calibrate slope), standard (Calibrate against a
standard), or a grab sample (Calibrate against a grab sample).
Use grab calibration only if a turbidity standard is not available.
10.2.5
10.2.6
Weak Lamp
The Weak Lamp warning appears when lamp intensity is low and the current being
supplied to the lamp has been increased above a level likely to significantly reduce lamp
life.
Replace the lamp board as soon as possible. After you replace the lamp, recalibrate the
sensor using either slope or standard calibration. See Calibrate slope or Calibrate against a
standard. Recalibration is necessary to reset the lamp power supply. Grab calibration will
not resent the power supply. Failure to recalibrate using slope or standard calibration may
signficantly reduce lamp life.
SN Warning
SN Warning will be displayed on the instrument to communicate an unusual but non-
fatal condition that may require checking and adjustments. Check three things.
1. Check the sensor/cable connection. Confirm that the swivel nut on the cable is in
the locked position on the sensor.
Note
Once the plastic threaded swivel nut is engaged with the sensor threads, rotate the
swivel ¾ turn to lock the cable to the sensor.
2. Confirm that sample water is flowing out of the debubbler drain outlet. This ensures
that the sensor is immersed in sample water.
3. Ensure that the sensor is not exposed to high ambient light sources (such as direct
sunlight).
Important
When using EPA/incandescent sensors (PN 8-0108-0002-EPA):
• Do not power up the instrument without the sensor connected.
• Do not disconnect and reconnect a sensor when a transmitter is powered.
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If this is inconvenient or cannot be avoided:
1. Cycle power to the instrument after connecting the sensor or
2. Perform a slope calibration or standard calibration routine after connecting the
sensor.
Following these guidelines will extend the life of the incandescent lamp and avoid
premature warnings and faults due to reduced lamp life.
Reference Manual
10.3 Troubleshooting calibration problems
Once you have completed the calibration sequence, the transmitter verifies that the
calibration meets certain requirements. If the calibration is valid, the transmitter displays
the Calibration complete screen and updates the calibration. If the calibration does not
meet requirements, the Calibration error screen appears. The transmitter retains the
original calibration.
Calbration method Section
User-prepared standard (Calibrate slope) Calibration error - user-prepared standard
Commerical standard (Calibrate against a
standard)
Grab sample (Calibrate against a grab sample) Calibration error - grab sample
Calibration error - commercial standard
10.3.1 Calibration error - user-prepared standard
1. For best results, calibrate using freshly prepared 20.0 NTU standard. Use the
procedure in Calibrate slope.
2. Has the stock 4000 NTU standard exceeded its expiration date?
3. Is the turbidity of the dilution water less than 0.5 NTU? If you are using bottled
distilled or deionized water, open a fresh bottle and repeat the calibration.
4. Are the lamp and detector windows clean? See Clean the sensor.
5. Is the sensor securely sealed in the calibration cup with no light leaking in? Putting a
dark cloth over the sensor and calibration cup and removing it should have no effect
on the reading. Are both the lamp and photodiode windows completely submerged
in the standard?
6. Was the correct turbidity value entered in the transmitter?
10.3.2
Calibration error - commercial standard
1. For best results, calibrate using 20.0 NTU standard.
2. Has the calibration standard exceeded its expiration date?
3. Are the lamp and detector windows clean? See Clean the sensor.
4. Is the sensor securely sealed in the calibration cup with no light leaking in? Putting a
dark cloth over the sensor and calibration cup and removing it should have no effect
100 Emerson.com/Rosemount
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