Tek-Trol TEK-DP 1670A User manual

Quick Start Guide
TEK-DP 1670A
796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Segmental Wedge Dierential Pressure Flow Meters

796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Quick Start Guide
1. Before you begin
2. Unpack
This guide provides basic guidelines to assist you in quickly getting started.
WARNING
Any installation of Pressure, Dierential Pressure, or Temperature Transmitters in an explosive
environment must always be in accordance with Local, National, and International Safety
Standards, codes, and practices. Review the approvals section of the Tek-DP 1670A reference
manual for any restrictions associated with a safe installation.
• Never exceed the maximum rated pressure or temperature of the ow element.
• Process pressure and/or process materials remaining in ow elements can cause injury do
not open any pressure-retaining parts under line pressure.
• Standard plant safety procedures should be followed when removing elements from service.
• Qualied technicians must perform maintenance.
• Disconnect all power sources to avoid electrical shock when servicing DP/Pressure
Transmitters etc.
Do not remove the transmitter covers in explosive environments when the circuit is live.
Make sure the transmitter is installed by qualied personnel and in accordance with applicable
codes of practice.
Tek-DP 1670A Segmental Wedge Dierential Pressure Flow Meters

Tek-DP 1670A
Technology Solutions
3. Dimensional Drawing
Fig 1: Tek-DP 1670A With Flanged Tappings and RFWN End Flanges (1 ½”, 2 and 3”)
A
A/2
C
B
D
Flow
direction
Size
in (mm)
A ± ¼”(±4.58mm)
in (mm) B
in (mm)
C
in (mm)
D
in (mm)
Approximate
Weight kg (lbs.)
Flange Rating Flange Rating Flange Rating
150 300 600 150 300 600 150 300 600
1 ½” (40) 21 ¼” (530) 21 ¾” (543) 22 ¼” (559) 11 ¾” (292) 5 ¾” (146) 8 ¼” (207) 8 ½” (214) 8 ½” (212) 25 (55) 28 (61) 32 (71)
2”(50) 21 ¾” (546) 22 ¼” (559) 23”(575) 11 ¾” (292) 5 ¾” (146) 8 ¾” (216) 8 ¾”(222) 9 ¼”(231) 28 (62) 32 (70) 38 (84)
3”(80) 25 ¾” (645) 25 ¾” (641) 26 ½”(660) 12 ½”(311) 6 ¼” (155) 6 ¼” (155) 6 ¾”(166) 7”(175) 35 (78) 42 (92) 46 (102)
*Note: Flow direction may be Bi -Directional.
*Note: Slip on, full face and RTJ flange connection are also available. Contact Tek-Trol for length details.

796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Quick Start Guide
Fig 2: Tek-DP 1670A With Flanged Tapping’s and RFWN End Flanges (4” to 24”)
Size
in (mm)
A ± ¼”(±4.58mm)
in (mm) B
in (mm)
C
in (mm)
D
in (mm)
Approximate
Weight kg (lbs.)
Flange Rating Flange Rating Flange Rating
150 300 600 150 300 600 150 300 600
4”
(100)
36”
(900)
36 ¾”
(920)
39 ½”
(990)
15 ¼”
(381)
7 ½”
(190)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
61
(135)
68
(150)
79
(175)
6”
(150)
41”
(1028)
42”
(1047)
44”
(1100)
18 ¼”
(457)
9”
(225)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
73
(160)
95
(210)
122
(270)
8”
(200)
43 ¾”
(1092)
44 ½”
(1111)
46 ¾”
(1168)
20 ¾”
(521)
10 ½”
(260)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
95
(210)
120
(265)
166
(365)
10”
(250)
45 ¾”
(1143)
47”
(1175)
50 ¼”
(1257)
24”
(600)
12”
(300)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
122
(270)
156
(345)
238
(525)
12”
(300)
52 ¾”
(1321)
54”
(1350)
56 ¾”
(1416)
27”
(675)
13 ½”
(336)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
159
(350)
181
(400)
14”
(350)
56”
(1400)
57”
(1425)
59 ½”
(1485)
29 ½”
(736)
14 ¼”
(356)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
186
(410)
277
(610)
16”
(400)
59”
(1475)
60 ½”
(1511)
63 ½”
(1587)
31”
(775)
15 ½”
(387)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
227
(500)
342
(755)
18”
(450)
63”
(1574)
64 ½”
(1613)
67”
(1675)
34”
(850)
16 ½”
(413)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
227
(500)
395
(870)
20”
(500)
67 ½”
(1686)
68 ¾”
(1720)
71 ½”
(1790)
37 ½”
(940)
18 ¾”
(470)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
318
(700)
499
(1100)
24”
(600)
74 ¼”
(1854)
75 ½”
(1886)
78 ¾”
(1968)
42 ¾”
(1066)
21 ¼”
(533)
2 ¾”
(70)
3”
(80)
3 ½”
(89)
433
(955)
594
(1310)
A± .25
A/2
C
B
D
Flow
direction
Meter
center-line
*Note: Flow direction may be Bi -Directional.

Tek-DP 1670A
Technology Solutions
Size
in (mm)
A ± ¼”(±4.58mm)
in (mm) B
in (mm)
C
in (mm)
D
in (mm)
Approximate
Weight kg (lbs.)
Flange Rating Flange Rating
150 300 600 150 300 600
8” (200) 43 ¾”(1092) 44 ½” (1111) 46 ¾”(1168) 20 ¾” (520) 10 ½”(260) 1” (25) 52 (115) 79 (175) 129 (285)
10”(250) 45 ¾”(1143) 47”(1175) 50 ¼”(1257) 24”(600) 12”(300) 1” (25) 75 (165) 127 (280) 204 (450)
12”(300) 52 ¾”(1320) 54” (1350) 56 ¾” (1416) 27” (675) 13 ½”(336) 1” (25) 107 (235) 172 (380)
14”(350) 56” (1400) 57”(1425) 59 ½”(1485) 29 ½”(736) 14 ¼”(356) 1”(25) 140 (310) 283 (625)
Fig 3: Tek-DP 1670A with Threaded Connection
*Note: Flow direction may be Bi -Directional.
B
D
A± .25
C
A/2
Flow
direction
Typical threaded
connection
Meter
centre-line
4. Installations
• Mounting Location Selection
• Generally, horizontal orientation of the ow element with the impulse tap positioning situated
between 45 to 90 degrees from a vertical centerline of the impulse tap component(s) is
recommended. This method of horizontal mounting allows for free passage of most solids and
helps to eliminate air entrapment at the transmitter connection in liquid operation. See Figure
8. below
• Other positions are acceptable provided proper venting of the transmitter sensing lines are
Dimensions are subject to vary at time of manufacturing based on nal Beta selected. Dimensional drawing
with a nal engineering sizing sheet will be provided within 1-2 weeks of order acceptance

796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Quick Start Guide
Fig 4: Horizontal Installations
Seal elementSeal element
Flow element
Transmitter
Fig 5: Vertical Installations
Wedge
Seal element
Seal element
Transmitter
• Straight Pipe Run Requirements
• As with most ow elements, proper operation and performance are dependent on the required
lengths of available upstream and downstream piping.
• The recommended minimum length of the upstream side of the Wedge ow element depends
on the ttings at the end of the straight runs and respective pipe conguration.
• Minimum upstream and downstream lengths are as follows:
Upstream requirements as a general rule: 10 nominal pipe diameters.
Downstream requirements as a general rule: 2 nominal pipe diameters.
accomplished. The dierences between sensing line elevations shall also be considered. Tap position
locations are suggested to be below the pipe centerline for clean liquid service.
• Service taps must be positioned such that all are self-draining for dirty liquid service (for ex, triple taps
units will be at the 3, 9, and 12 o’clock position).
• Dirty liquid service can be any process where the uid may settle, cake, or be set up within the tap
chambers. Examples of dirty liquid services are waste streams, coke slurries, black liquor, uids with high
particulates, etc.
• As shown in Figure 9, vertical installations may introduce a slight hydrostatic head eect that must be
considered when zeroing the transmitter.
• Please Note: For applications where installed accuracy is critical, laboratory ow calibration for Coecient
of discharge (Cd) development per eld installation geometry is recommended. This service is optional
but can be provided at additional cost.

Tek-DP 1670A
Technology Solutions
Fig 6: Flange bolt tightening pattern
• Pipe Connections
Tighten the ange bolts in a ‘star’ pattern, as shown in Figure 6, to avoid localized stresses on the
gaskets.
Table 1: Minimum upstream and downstream lengths
Fittings Recommended Minimum
Upstream Downstream Upstream Downstream
3 Elbows close coupled 15D 5D 15D 3D
2 Elbows close coupled out of plane 10D 5D 10D 3D
2 Elbows close coupled in plane 10D 5D 5D 3D
1 Elbow 10D 5D 5D 3D
Tee-bull plugged 10D 5D 5D 3D
Tee-run plugged 10D 5D 5D 3D
Tee-ow in bull and run 10D 5D 5D 3D
Y-run plugged 10D 5D 5D 3D
Concentric reducer 10D 5D 5D 3D
Concentric expander 10D 5D 5D 3D
Partially open gate valve 10D 5D 10D 3D
41
2
3
8
7
6
54
3
2
1

796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Quick Start Guide
• Removal of the Wedge Meter
• Inspection
• The Tek-DP 1670A Segmental Wedge Flow Meter has no moving parts that require servicing.
• Removal of the meter is generally not required other than for standard maintenance cleaning
of process lines.
• Before removal, shut o all process ow, pressure and drain lines if possible before loosening
any bolts.
• Disconnect transmitter connections and remove impulse lines or remote seal elements.
• Loosen and disconnect element line connections and remove from process pipeline.
• Check sealing surfaces periodically for nicks and gouges before reinstallation.
• Elements under severe operating conditions must be inspected for signs of corrosion and
erosion to minimize unexpected shutdowns.
This section provides troubleshooting techniques for most common operating problems shown in
table 2.
Table 2: Troubleshooting Techniques
Symptoms Area Possible Problem or Solution
No Signal (0mA) Transmitter
• No Power to transmitter.
• Transmitter not wired correctly.
• Check continuity on wiring or loose connection.
Negative Signal
(<0mA) Transmitter • Transmitter wires are reversed.
Low signal (<4mA)
Tek-DP 1670A
• Wedge Meter is installed backwards, with gauge lines attached as marked.
• In this case, the high-pressure tap would be sensing a lower pressure than the low-
pressure tap.
• This negative DP would force the signal below 4mA.
Gauge Line
• Gauge lines are reversed. Transmitter shows more pressure on lower side than
higher side.
• Check “H” and “L” marks on Wedges.
Zero Signal (4mA)
Tek-DP 1670A
• Meter has been damaged.
• Remove meter and visually inspect.
• No ow in pipeline.
• Check other system locations to verify ow through the meter.
• The meter could be under pressure but still have no ow.
Manifold
• Manifold / gauge lines closed or blocked.
• Ensure valves and lines are open.
• If uid is safe, open vent valves on transmitter to verify pressure in the gauge lines.
5. Maintenance
6. Troubleshooting

Tek-DP 1670A
Technology Solutions
Wrong Signal
High or Low
Tek-DP 1670A
• Process conditions do not match actual conditions.
• Contact Tek-Trol or your sales representative to recalculate using the correct process
conditions.
• Wrong meter.
• Verify serial numbers on meters to ensure correct specications.
• Sometimes two meters are interchanged. Remember each Wedges has a unique
ow coecient.
Gauge Lines
• Foreign material trapped in gauge lines. Dirt and sediment can settle into the gauge
lines. If the uid is safe, vent the gauge lines and inspect for spurts of solids, gasses,
or liquids (whichever should not be there).
• If the uid is not safe, open the center manifold valve for several minutes under
high DP. Close the valve and compare the signal level to before readings.
• In a horizontal, liquid application, install the meter with the taps on the sides of the
pipe (3 or 9 o’clock) For a horizontal, gas application, install at top or sides of the
pipe (12, 3, or 9 o’clock).
Flow Computer
• Flow calculations have an error.
• Use loop calibrator and apply 4, 12, and 20mA to computer / system.
• Each of these points should be correlate with the Wedges sizing information.
• Current output signal is read incorrectly.
• Apply a known current to the loop and read the raw signal in the computer.
• Most computers allow the user to see the mA signal directly.
Unsteady Signal Tek-DP 1670A • Partially full pipe occurring (liquids only).
• Periods with a partially full pipe will cause wrong readings. See above for details.
Slow response time Transmitter • Dampening to long.
Sudden change in
readings
Tek-DP 1670A
• Foreign object lodged in meter.
• This will increase the restriction of the meter and raise the DP.
• Remove the meter and visually inspect.
Gauge Lines • There may be leakage in line.
Signal very High Tek-DP 1670A
• Meter body, near the pressure taps.
• If any arrow is not visible and the meter is large than 2”, the ow direction can be
determined by the location of the pressure taps.
• The pressure taps will be closer to the upstream side.
• On meters less than 2”, the gauge lines will need to be removed. Look at the base
of both pressure taps. One tap will be smooth at the base, the other will be mostly
weld material.
• The smooth tap is on the upstream side.
• Flow is going in the opposite direction from what was expected. The assumption of
ow direction is sometimes wrong.
• Verify with other system readings.
• With a meter measuring backward ow, the DP signal will be approximately 30%
high.
• Partially full pipe (liquids only). A partially full pipe will cause the meter to read very
high. This can happen even in pressurized systems.
On horizontal pipes: If the uid is safe, open a pressure tap on the top of the
pipe. Air release will indicate partially full pipe.
On vertical pipes: Up ow will guarantee a full pipe. Down ow is dicult to
diagnose if the pipe is full.
• Foreign object lodged in meter. This will increase the restriction of the meter and
raise the DP. Remove the meter and visually inspect.

796 Tek Drive, Crystal Lake, IL 60014 USA [phone] [phone] www.tek-trol.com
Quick Start Guide
Signal very High
Gauge Lines • Leak on low pressure gauge line.
• Perform a leak check from the meter to the transmitter.
Transmitter
• Leak on low pressure vent valve. Perform a leak check on valve.
• Zero point has shifted positively. This will cause errors more pronounced at the low
end of the transmitter range.
• Verify by closing the manifold side valves and opening the center valve. The reading
should go to zero (4mA).
• Recalibrate if necessary. DP span is set very low.
• Use pressure calibrator or handheld communicator to verify span point.
Flow Computer
• 4mA set to minimum ow.
• Our calculations assume that 4mA will be equal to zero ow. Sometimes 4mA is set
to equal the minimum ow on the sizing page.
• This error will be zero at maximum ow and increase as the ow decreases.
• The amount of error will depend on the zero oset.
Signal Very Low
Manifold
• Manifold is cross-vented. The center valve must be closed.
• To test, close the two side valves and watch the transmitter signal.
• If the signal goes to zero (4mA), the center valve is not closed completely.
Gauge lines • Leak on high pressure gauge line.
• Perform a leak check from the meter to the transmitter.

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Tek-Dpro Flow Solutions
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Tek-Trol Solutions BV Tek-Trol Middle East FZE
PO Box 121 Windsor, Colorado
80550, USA
Sales: [phone]
796 Tek Drive Crystal Lake, IL
60014, USA
Sales: [phone]
Florijnstraat 18, 4879 AH
Etten-Leur, Netherlands
Sales: [phone]
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21125, Sharjah, UAE
Sales: [phone]
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Support: [phone] Email: [e-mail] www.tek-trol.com