Geokon 4600 User manual

Instruction Manual
Model 4600
VW Settlement Sensor
No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc.
The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility
for errors, omissions, or misinterpretation. The information herein is subject to change without notification.
Copyright © 1984-2018 by Geokon, Inc.
Doc Rev L 03/19/2018

Warranty Statement
Geokon, Inc. warrants its products to be free of defects in materials and workmanship, under
normal use and service for a period of 13 months from date of purchase. If the unit should
malfunction, it must be returned to the factory for evaluation, freight prepaid. Upon examination
by Geokon, if the unit is found to be defective, it will be repaired or replaced at no charge.
However, the WARRANTY is VOID if the unit shows evidence of having been tampered with
or shows evidence of being damaged as a result of excessive corrosion or current, heat, moisture
or vibration, improper specification, misapplication, misuse or other operating conditions outside
of Geokon's control. Components which wear or which are damaged by misuse are not
warranted. This includes fuses and batteries.
Geokon manufactures scientific instruments whose misuse is potentially dangerous. The
instruments are intended to be installed and used only by qualified personnel. There are no
warranties except as stated herein. There are no other warranties, expressed or implied, including
but not limited to the implied warranties of merchantability and of fitness for a particular
purpose. Geokon, Inc. is not responsible for any damages or losses caused to other equipment,
whether direct, indirect, incidental, special or consequential which the purchaser may experience
as a result of the installation or use of the product. The buyer's sole remedy for any breach of this
agreement by Geokon, Inc. or any breach of any warranty by Geokon, Inc. shall not exceed the
purchase price paid by the purchaser to Geokon, Inc. for the unit or units, or equipment directly
affected by such breach. Under no circumstances will Geokon reimburse the claimant for loss
incurred in removing and/or reinstalling equipment.
Every precaution for accuracy has been taken in the preparation of manuals and/or software,
however, Geokon, Inc. neither assumes responsibility for any omissions or errors that may
appear nor assumes liability for any damages or losses that result from the use of the products in
accordance with the information contained in the manual or software.

TABLE of CONTENTS
1. GENERAL DESCRIPTION...................................................................................................................................1
2. INSTALLATION PROCEDURES........................................................................................................................3
2.1 SETTLEMENT SYSTEM INSTALLATION .................................................................................................................3
2.2 SWAGELOK TUBE FITTING INSTRUCTIONS...........................................................................................................4
2.2.1 Installation..................................................................................................................................................4
2.2.2 Reassembly Instructions..............................................................................................................................5
3. TAKING READINGS.............................................................................................................................................7
3.1 GK-404 READOUT BOX.......................................................................................................................................7
3.2 GK-405 READOUT BOX.......................................................................................................................................8
3.2.1 Connecting Sensors.....................................................................................................................................8
3.2.2 Operating the GK-405 ................................................................................................................................8
3.3 GK-403 READOUT BOX (OBSOLETE MODEL)......................................................................................................9
3.3.1 Connecting Sensors.....................................................................................................................................9
3.3.2 Operating the GK-403 ................................................................................................................................9
3.4 MEASURING TEMPERATURES...............................................................................................................................9
4. DATA REDUCTION ............................................................................................................................................10
4.1 CORRECTIONS FOR TEMPERATURE ....................................................................................................................10
5. MAINTENANCE AND TROUBLE SHOOTING..............................................................................................13
APPENDIX A. SPECIFICATIONS.........................................................................................................................13
A.1 PRESSURE TRANSDUCER...................................................................................................................................13
A.2 THERMISTOR (SEE APPENDIX BALSO)..............................................................................................................13
APPENDIX B. THERMISTOR TEMPERATURE DERIVATION.....................................................................14
APPENDIX C. MODEL 4600M, MULTILEVEL SETTLEMENT SYSTEM ....................................................15
C.1 GENERAL DESCRIPTION ....................................................................................................................................15
C.2 BOREHOLE REQUIREMENTS ..............................................................................................................................17
C.3 ANCHOR SPACING.............................................................................................................................................17
C.4 SETTLEMENT SYSTEM INSTALLATION...............................................................................................................17
C.5 HYDRAULICALLY ACTIVATED BORROS ANCHOR SYSTEMS ..............................................................................19
C.5.1 Installation Instructions for Hydraulic Anchors.......................................................................................19
C.6 MANUAL SPIDER ANCHORS ..............................................................................................................................21
C.6.1 Installation Instructions for Manual Spider Anchors...............................................................................21

FIGURES
FIGURE 1-MODEL 4600 VW SETTLEMENT SYSTEM..................................................................................................... 1
FIGURE 2-RESERVOIR DETAILS.................................................................................................................................... 2
FIGURE 3-TUBE INSERTION.......................................................................................................................................... 4
FIGURE 4-MAKE A MARK AT SIX O’CLOCK ................................................................................................................. 4
FIGURE 5-TIGHTEN ONE AND ONE-QUARTER TURNS .................................................................................................. 5
FIGURE 6-MARKS FOR REASSEMBLY ........................................................................................................................... 5
FIGURE 7-FERRULES SEATED AGAINST FITTING BODY................................................................................................ 6
FIGURE 8-TIGHTEN NUT SLIGHTLY.............................................................................................................................. 6
FIGURE 9-LEMO CONNECTOR TO GK-404 ................................................................................................................... 7
FIGURE 10 -LIVE READINGS –RAW READINGS............................................................................................................. 8
FIGURE 11 -TYPICAL SETTLEMENT SYSTEM CALIBRATION REPORT............................................................................11
FIGURE 12 -TYPICAL PRESSURE TRANSDUCER CALIBRATION REPORT........................................................................12
FIGURE 13 -ATYPICAL 4600M INSTALLATION............................................................................................................15
FIGURE 14 -TOP RESERVOIR AND SETTLEMENT PLATE DETAILS.................................................................................16
FIGURE 15 -SINGLE POINT ANCHOR ............................................................................................................................19
FIGURE 16 -DOUBLE POINT ANCHOR...........................................................................................................................19
FIGURE 17 -TYPICAL MANUAL SPIDER ANCHOR ASSEMBLY.......................................................................................21
TABLES
TABLE 1-VIBRATING WIRE TRANSDUCER SPECIFICATIONS ........................................................................................13
TABLE 2-THERMISTOR RESISTANCE VERSUS TEMPERATURE .....................................................................................14
EQUATIONS
EQUATION 1-ELEVATION OF SETTLEMENT FLANGE....................................................................................................10
EQUATION 2-TEMPERATURE CORRECTION .................................................................................................................10
EQUATION 3-RESISTANCE TO TEMPERATURE .............................................................................................................14

1
1. GENERAL DESCRIPTION
(For instructions regarding Model 4600M Multilevel Settlement System, see Appendix C.)
The 4600 Settlement System is designed to measure the settlement of a point relative to a point
located immediately below it, in solid ground (bedrock). The usual method of installation is
shown in Figure 1.
Figure 1 - Model 4600 VW Settlement System
The 4600 system has the disadvantage of requiring a borehole to reach solid ground but has the
distinct advantage of avoiding the necessity for long horizontal runs of liquid-filled tubing to a
remote readout location. A series of 4600 system, installed vertically above each other in a single
borehole, can be used to monitor subsurface settlements at different elevations. The system is
particularly suited to the measurement of settlements below sand islands constructed in marine
environments.
A pressure sensor is located in solid ground by attaching it to the upper end of a steel pipe, or
rod, placed inside a borehole drilled to bedrock. The lower end of the pipe is grouted in place. A
liquid-filled tube extends upwards from the sensor to the reservoir, which is attached to a
settlement plate.

2
The settlement plate, usually located at the ground surface, (i.e., the elevation of the mouth of the
borehole) settles with the ground, thus altering the height of the liquid column inside the liquid
tube above the sensor. The sensor detects the change in liquid pressure, which is read by means
of an electrical cable running to the readout location. Readout is accomplished by the GK- 404 or
GK-405 Readout Boxes, or by a Datalogger. The sensor contains a thermistor for the
measurement of temperatures as well as gas-discharge tubes for lighting protection.
Standard systems are filled with either de-aired water or de-aired antifreeze solution, with
chemicals added to prevent the growth of algae. The system is “closed” in that the inside of the
sensor is connected, via a vent line, to the space above the reservoir. A desiccant chamber
prevents moisture from entering the vent line from the reservoir.
This arrangement ensures that the sensor readings are not influenced by temperature changes
inside the reservoir, or by changes in barometric pressure. Details of the reservoir assembly are
shown in Figure 2.
Figure 2 - Reservoir Details

3
2. INSTALLATION PROCEDURES
2.1 Settlement System Installation
Installation generally requires a borehole to be drilled. The required borehole diameter is 75 mm
(three inches) or larger. Any casing, if used, should have an inner diameter greater than 70 mm
(two and a half inches). The recommended distance between the sensor and the reservoir for the
standard sensor range (seven meters) is three to five meters. The minimum spacing can be
smaller if the spacing exceeds three times the anticipated maximum settlement. Thus if the
anticipated maximum settlement is 0.5 meters, the sensor/reservoir spacing can be as close as
one and a half meters.
The Model 4600 Assembly is usually shipped with the liquid tube prefilled with de-aired liquid.
The liquid tube is of such a length to accommodate the spacing between sensor and reservoir
specified at the time of ordering. Measure the depth of the borehole and prepare a length of pipe,
(one inch water pipe is ideal), which will place the sensor at the desired elevation. (As previously
discussed, the elevation is normally from three to five meters below the surface, depending on
the anticipated settlement.)
Attach the sensor to the upper end of the pipe (the sensor normally has a matching thread built
into it). Tie a long piece of rope to the upper end of the pipe and lightly tape a grout pipe to the
lower end of the pipe. Lower the pipe into the borehole until it rests on the bottom.
Tremie full strength grout into the bottom 1.5 meters of the borehole. Pull the grout pipe up two
meters and tremie in a soft bentonite grout until the borehole is full.
If the hole is cased, the casing can be removed by completing the following: Tie the reservoir
and signal cable to the rope. Next, tie the rope to the top of the drill mast so that the casing can
slide over and around the reservoir and signal cable. The casing can now be removed.
4600 Settlement Systems are usually shipped with the reservoir completely filled with de-aired
liquid to ensure that there is no danger of air bubbles entering the liquid tube during shipment.
But, because there is a danger that temperature changes during shipment could cause pressure
changes sufficient to push the reservoir plug out of its housing and spill fluid, there is a small
diameter ’travelling tube’ connected to the reservoir plug. This ‘travelling tube’ is half-filled
with water and connects to the water in the reservoir keeping the pressure inside the reservoir at
the ambient atmospheric pressure during shipment no matter what the temperature.
To put the 4600 system into service it is necessary, first, to grip the Swagelok cap holding the
travelling tube and pull the reservoir plug out of the top of the reservoir, (the larger of the two
Delrin plugs). Suck 10 cc of liquid from the top of the reservoir using the syringe provided. (The
syringes provided have a capacity of 12 cc). Add a few drops of light oil to the surface of the
liquid to prevent evaporation. Push the reservoir plug back into place and remove the cap holding
the travelling tube. Remove the other Swagelok cap and connect the short copper U shaped tube
supplied, with fittings, to the top of the reservoir and the top of the desiccant chamber. Tighten
the Swagelok connectors per the instructions in Section 2.2.
Attach the settlement flange to the settlement plate using the bolts supplied.

4
While holding the reservoir in an upright position at all times, attach the settlement flange and
plate to the reservoir using the two machine screws provided, or by using PVC cement obtained
locally. (Federal Regulations prohibit the shipment of PVC cement). Apply PVC cement to the
inside of the reservoir extension (see Figure 2) and to the outside of the top of the reservoir
housing. Be careful at all times not to allow the reservoir to tip over on its side, which would
allow liquid to enter the vent line.
Position the settlement flange at the top of the borehole and dig a trench leading from the
borehole to the readout location into which the signal cable can be buried. Avoid sharp bends
where the cable exits the borehole by excavating a broad sweep from the borehole to the trench.
Bury the signal cable in the trench using sand or other fine grain materials around the cable to
protect the cable from damage.
Terminate the signal cable inside a readout enclosure mounted on a post or pipe driven into the
ground at the readout location.
2.2 Swagelok Tube Fitting Instructions
These instructions apply to one inch (25 mm) and smaller fittings.
2.2.1 Installation
1) Fully insert the tube into the fitting until it bumps against the shoulder.
Figure 3 - Tube Insertion
2) Rotate the nut until it is finger-tight. (For high-pressure applications as well as high-
safety-factor systems, further tighten the nut until the tube will not turn by hand or
move axially in the fitting.)
3) Mark the nut at the six o’clock position.
Figure 4 - Make a Mark at Six O’clock

5
4) While holding the fitting body steady, tighten the nut one and one quarter turns, until
the mark is at the nine o’clock position. (Note: For 1/16", 1/8", 3/16", and 2, 3, and 4
mm fittings, tighten the nut three-quarters of a turn until the mark is at the three
o’clock position.)
Figure 5 - Tighten One and One-Quarter Turns
2.2.2 Reassembly Instructions
Swagelok tube fittings may be disassembled and reassembled many times.
Warning: Always depressurize the system before disassembling a Swagelok tube
fitting.
1) Prior to disassembly, mark the tube at the back of the nut, then make a line along the
nut and fitting body flats. These marks will be used during reassembly to ensure the
nut is returned to its current position.
Figure 6 - Marks for Reassembly
2) Disassemble the fitting.
3) Inspect the ferrules for damage and replace if necessary. If the ferrules are replaced
the connector should be treated as a new assembly. Refer to the section above for
installation instructions.
4) Reassemble the fitting by inserting the tube with preswaged ferrules into the fitting
until the front ferrule seats against the fitting body (Figure 7).

6
Figure 7 - Ferrules Seated Against Fitting Body
5) While holding the fitting body steady, rotate the nut with a wrench to the previous
position as indicated by the marks on the tube and the connector. At this point, there
will be a significant increase in resistance.
6) Tighten the nut slightly.
Figure 8 - Tighten Nut Slightly

7
3. TAKING READINGS
Take the initial reading, R0, several times to ensure a good baseline reading. Read the
temperature also. An in situ calibration check, of sorts, can be made by raising the reservoir
flange by a measured amount and observing the change in readout thus produced. Compare this
calibration with the factory calibration. Alternatively, the initial gage reading, when converted to
a height of liquid column, should correspond with the known difference in elevation between the
reservoir and sensor. When taking initial readings, conduct a level survey to determine the
elevation, E0, of the settlement flange.
Readings should be taken by a Readout Box as described in the following sections. Where a
Datalogger is used, the frequency limits should be set between 1400 to 3500 Hz. The black and
red conductors are connected to the vibrating wire sensor and the green and white conductors to
the thermistor.
3.1 GK-404 Readout Box
The Model GK-404 Vibrating Wire Readout is a portable, low-power, handheld unit that is
capable of running for more than 20 hours continuously on two AA batteries. It is designed for
the readout of all Geokon vibrating wire gages and transducers, and is capable of displaying the
reading in either digits, frequency (Hz), period (µs), or microstrain (µε). The GK-404 also
displays the temperature of the transducer (embedded thermistor) with a resolution of 0.1 °C.
Before use, attach the flying leads to the GK-404 by aligning the red circle on the silver “Lemo”
connector of the flying leads with the red line on the top of the GK-404 (Figure 9). Insert the
Lemo connector into the GK-404 until it locks into place.
Figure 9 - Lemo Connector to GK-404
Connect each of the clips on the leads to the matching colors of the sensor conductors, with blue
representing the shield (bare). Turn the GK-404 on by pressing the “ON/OFF” button on the
front panel of the unit. The initial startup screen will be displayed. After approximately one
second, the GK-404 will start taking readings and display them based on the settings of the POS
and MODE buttons. The unit display (from left to right) is as follows:
•The current Position: Set by the POS button, displayed as a letter A through F.
•The current Reading: Set by the MODE button, displayed as a numeric value followed by the
unit of measure.
•Temperature reading of the attached gage in degrees Celsius.
Use the POS button to select position Band the MODE button to select Dg (digits). (Other
functions can be selected as described in the GK-404 Manual.)

8
The GK-404 will continue to take measurements and display readings until the unit is turned off,
either manually, or if enabled, by the Auto-Off timer. If no reading displays or the reading is
unstable, consult Section 5 for troubleshooting suggestions. For further information, please refer
to the GK-404 manual.
3.2 GK-405 Readout Box
The GK-405 Vibrating Wire Readout is made up of two components: The Readout Unit,
consisting of a Windows Mobile handheld PC running the GK-405 Vibrating Wire Readout
Application; and the GK-405 Remote Module, which is housed in a weatherproof enclosure and
connects via a cable to the vibrating wire gage to be measured. The two components
communicate wirelessly using Bluetooth®, a reliable digital communications protocol. The
Readout Unit can operate from the cradle of the Remote Module, or, if more convenient, can be
removed and operated up to 20 meters from the Remote Module.
3.2.1 Connecting Sensors
If the sensor cable has a 10-pin bulkhead attached, align the grooves on the sensor
connector (male), with the appropriate connector on the readout (female connector
labeled senor or load cell). Push the connector into place, and then twist the outer ring of
the male connector until it locks into place.
If the sensor cable has flying leads, attach the GK-403-2 flying leads to the bare leads of
a Geokon vibrating wire sensor by connecting each of the clips on the leads to the
matching colors of the sensor conductors, with blue representing the shield (bare).
3.2.2 Operating the GK-405
Press the button labeled “POWER ON (BLUETOOTH)”. A blue light will begin
blinking, signifying that the Remote Module is waiting to connect to the handheld unit.
Launch the GK-405 VWRA program by tapping on “Start” from the handheld PC’s main
window, then “Programs” then the GK-405 VWRA icon. After a few seconds, the blue
light on the Remote Module should stop flashing and remain lit. The Live Readings
Window will be displayed on the handheld PC. Choose display mode “B”. Figure 10
shows a typical vibrating wire output in digits and thermistor output in degrees Celsius. If
no reading displays or the reading is unstable, see Section 5 for troubleshooting
suggestions. For further information, consult the GK-405 Instruction Manual.
Figure 10 - Live Readings – Raw Readings

9
3.3 GK-403 Readout Box (Obsolete Model)
The GK-403 can store gage readings and apply calibration factors to convert readings to
engineering units. The following instructions explain taking gage measurements using Mode
“B”. Consult the GK-403 Instruction Manual for additional information.
3.3.1 Connecting Sensors
If the sensor cable has a 10-pin bulkhead attached, align the grooves on the sensor
connector (male), with the appropriate connector on the readout (female connector
labeled senor or load cell). Push the connector into place, and then twist the outer ring of
the male connector until it locks into place.
If the sensor cable has flying leads, attach the GK-403-2 flying leads to the bare leads of
a Geokon vibrating wire sensor by connecting each of the clips on the leads to the
matching colors of the sensor conductors, with blue representing the shield (bare).
3.3.2 Operating the GK-403
1) Turn the display selector to position “B”.
2) Turn the unit on.
3) The readout will display the vibrating wire output in digits. The last digit may change
one or two digits while reading.
4) The thermistor reading will be displayed above the gage reading in degrees
centigrade.
5) Press the “Store” button to record the value displayed.
If the no reading displays or the reading is unstable, see Section 5 for troubleshooting
suggestions.
The unit will automatically turn off after approximately two minutes to conserve power.
3.4 Measuring Temperatures
All vibrating wire transducers are equipped with a thermistor, which gives a varying resistance
output as the temperature changes. The white and green leads of the instrument cable are
normally connected to the internal thermistor. Geokon readout boxes will read the thermistor and
display the temperature in degrees C.
To read temperatures using an ohmmeter, connect an ohmmeter to the green and white
thermistor leads coming from the displacement transducer. Since the resistance changes with
temperature are large, the effect of cable resistance is usually insignificant. For long cables a
correction can be applied, equal to approximately 14.7 Ωfor every 1000 ft. (48.5Ωper km) at
20 °C. Multiply these factors by two to account for both directions. Look up the temperature for
the measured resistance in Appendix B, Table 2.

10
4. DATA REDUCTION
The elevation (E) of the settlement flange at subsequent measurement times is given by the
equation:
E = E0+ (R1– R0) G
Equation 1 - Elevation of Settlement Flange
Where;
R0is the initial reading on channel B.
R1is the subsequent reading on channel B.
G is the calibration factor supplied with the sensor. (Provided on the calibration report supplied
by the factory. A typical calibration report is shown in Figure 11.)
For Example:
If;
E0= 541.62 meters
R0= 7510
R1= 7782
G = -0.001712 m/digit
Then;
E = 541.62 + (7782 – 7510) (-0.001712) meters
E = 541.15 meters
In other words, there has been a settlement of 0.47 meters.
4.1 Corrections for Temperature
The 4600 system is usually completely buried; therefore, temperature effects are negligible.
Should temperature correction be required, the temperature correction to the elevation (ET) is
given by:
ET= E0+ (R1– R0) G + (T1– T0) K
Equation 2 - Temperature Correction
Where;
E0, R1, R0, and G are the same as defined for Equation 1.
T1is the current temperature.
T0is the initial temperature.
K is the Thermal factor given on the calibration report.
Note: The calibration report shown in Figure 11 was developed using a simple manometer. It is
good only over a range of three meters height differential between reservoir and sensor. If this
range is exceeded by the initial setup or by large amounts of settlement, there are two options:
Option 1: Continue to use the Settlement System calibration report shown in Figure 11.
Option 2: Use the Pressure Transducer calibration report supplied with the equipment (Figure
12), which was developed by calibrating the pressure sensor over a wider range.

11
Figure 11 - Typical Settlement System Calibration Report

12
Figure 12 - Typical Pressure Transducer Calibration Report

13
5. MAINTENANCE AND TROUBLE SHOOTING
Since all the 4600 Settlement System components are buried, there is no maintenance to observe
and little can be done in the event the readings become suspect. Unstable readings, especially
with data loggers, may be caused by electrical noise from nearby power lines or electrical
equipment. Make sure that the ground conductor is connected to ground on the datalogger, or to
the blue clip on the patch cord from the readout.
Resistance between the black and red conductors should be 180 ohms ±10 ohms plus five ohms
for every 100 meters of lead wire.
Resistance between the green and white wires depends on the temperature, as shown by the
Thermistor Chart in Appendix B.
APPENDIX A. SPECIFICATIONS
A.1 Pressure Transducer
Model
4500AL
Available Ranges1(ft.)
Available Ranges
1
(m)
0-10, 0-20, 0-50
3, 7, 15,
Resolution
0.025% FS
Linearity
0.5% FS3
Accuracy2
0.1% FS4
Overrange
2 ×FS
Thermal
Coefficient
<0.05% FS/°C
Frequency Range
1400-3500Hz
Temperature Range
-20 °C to +80 °C
Length x Diameter
Reservoir: 305 mm x 60 mm
Sensor: 191 mm x 35 mm
Table 1 - Vibrating Wire Transducer Specifications
Notes:
1Other ranges available upon request.
2Laboratory accuracy. Total system accuracy is subject to site-specific variables. Accuracy of
test apparatus: 0.05%.
30.1% FS linearity available upon request.
4Derived using 2nd order polynomial.
A.2 Thermistor (See Appendix B also)
Range: -80 to +150 °C
Accuracy: ±0.5 °C

14
APPENDIX B. THERMISTOR TEMPERATURE DERIVATION
Thermistor Type: YSI 44005, Dale #1C3001-B3, Alpha #13A3001-B3
Resistance to Temperature Equation:
T= 1
A+B(LnR)+C(LnR)3-273.2
Equation 3 - Resistance to Temperature
Where;
T =Temperature in °C.
LnR =Natural Log of Thermistor Resistance.
A =1.4051 ×10-3
B =2.369 ×10-4
C =1.019 ×10-7
Note: Coefficients calculated over the −50 to +150°C. span.
Ohms
Temp
Ohms
Temp
Ohms
Temp
Ohms
Temp
Ohms
Temp
201.1K
-50
16.60K
-10
2417
+30
525.4
+70
153.2
+110
187.3K
-49
15.72K
-9
2317
31
507.8
71
149.0
111
174.5K
-48
14.90K
-8
2221
32
490.9
72
145.0
112
162.7K
-47
14.12K
-7
2130
33
474.7
73
141.1
113
151.7K
-46
13.39K
-6
2042
34
459.0
74
137.2
114
141.6K
-45
12.70K
-5
1959
35
444.0
75
133.6
115
132.2K
-44
12.05K
-4
1880
36
429.5
76
130.0
116
123.5K
-43
11.44K
-3
1805
37
415.6
77
126.5
117
115.4K
-42
10.86K
-2
1733
38
402.2
78
123.2
118
107.9K
-41
10.31K
-1
1664
39
389.3
79
119.9
119
101.0K
-40
9796
0
1598
40
376.9
80
116.8
120
94.48K
-39
9310
+1
1535
41
364.9
81
113.8
121
88.46K
-38
8851
2
1475
42
353.4
82
110.8
122
82.87K
-37
8417
3
1418
43
342.2
83
107.9
123
77.66K
-36
8006
4
1363
44
331.5
84
105.2
124
72.81K
-35
7618
5
1310
45
321.2
85
102.5
125
68.30K
-34
7252
6
1260
46
311.3
86
99.9
126
64.09K
-33
6905
7
1212
47
301.7
87
97.3
127
60.17K
-32
6576
8
1167
48
292.4
88
94.9
128
56.51K
-31
6265
9
1123
49
283.5
89
92.5
129
53.10K
-30
5971
10
1081
50
274.9
90
90.2
130
49.91K
-29
5692
11
1040
51
266.6
91
87.9
131
46.94K
-28
5427
12
1002
52
258.6
92
85.7
132
44.16K
-27
5177
13
965.0
53
250.9
93
83.6
133
41.56K
-26
4939
14
929.6
54
243.4
94
81.6
134
39.13K
-25
4714
15
895.8
55
236.2
95
79.6
135
36.86K
-24
4500
16
863.3
56
229.3
96
77.6
136
34.73K
-23
4297
17
832.2
57
222.6
97
75.8
137
32.74K
-22
4105
18
802.3
58
216.1
98
73.9
138
30.87K
-21
3922
19
773.7
59
209.8
99
72.2
139
29.13K
-20
3748
20
746.3
60
203.8
100
70.4
140
27.49K
-19
3583
21
719.9
61
197.9
101
68.8
141
25.95K
-18
3426
22
694.7
62
192.2
102
67.1
142
24.51K
-17
3277
23
670.4
63
186.8
103
65.5
143
23.16K
-16
3135
24
647.1
64
181.5
104
64.0
144
21.89K
-15
3000
25
624.7
65
176.4
105
62.5
145
20.70K
-14
2872
26
603.3
66
171.4
106
61.1
146
19.58K
-13
2750
27
582.6
67
166.7
107
59.6
147
18.52K
-12
2633
28
562.8
68
162.0
108
58.3
148
17.53K
-11
2523
29
543.7
69
157.6
109
56.8
149
Table 2 - Thermistor Resistance Versus Temperature
55.6
150