STATE OF CALIFORNIA

DEPARTMENT OF TRANSPORTATION

INSTRUMENTATION FINAL REPORT

MEASUREMENT OF THE CURING

TEMPERATURE IN MASS CONCRETE
POURS

Dublin 580/680 Interchange

9 January 2001

Prepared for

Ric Maggenti

By

Engineering Service Center

Materials Engineering and Testing Services
Instrumentation Services Branch

5900 Folsom Blvd.

Sacramento, CA 95819-0128

ORIGINAL SIGNED BY
Danny L. Callaway
Report By:
Danny Callaway, P. E.
Instrumentation Services
 TABLE OF CONTENTS

I. DISCUSSION 3

II. EQUIPMENT LIST 5

III. CONCRETE MIX DESIGNS 6

IV. FIELD DIARY 9

V. PHOTOGRAPHS 10

VI. THERMOCOUPLE LOCATIONS 14

VII. SAMPLE DATA TABLE 17

VIII. DATA PLOTS 18

IX. DATA ACQUISITION PROGRAMS 30

I. DISCUSSION

During the curing process concrete undergoes an exothermic chemical reaction. Generally this heat production
is of little consequence; it is released over a rather long period and is easily dissipated to the surrounding environment.

Large concrete structures (mass concrete) however present a problem, the heat generated within the body of the
structure cannot be dissipated quickly, and rather large temperature gradients can develop between the center and the
surface of the structure. These temperature gradients during the cure period produce cracks in the finished concrete
structure. These cracks serve as entry portals for chlorides that have a deleterious effect on the reinforcing steel.

Temperature gradients can be controlled (reduced) in a variety of manners. Replacing the mixing water with
ice and pre-cooling the aggregate, to reduce the maximum temperature, are methods that are used but with limited
effectiveness. Constructing large structures in small stages, or lifts, can be done, but it is slow and the finished structure
is weakened at the cold joints in the concrete. Another way to reduce these temperature gradients is to modify the mix
design (adding fly ash for example) to slow the curing process. Slowing the curing process means longer construction
times, which may be objectionable. Installing tubing within the structure and circulating a cooling fluid through this
tubing to maintain a rather constant temperature is another option. Both of these last techniques where investigated in
this study.

Construction at the 580/680 interchange in Dublin included a number of mass concrete pours. Data from six of
these pours is included here. These six pours used three different mix designs as follows; at bents 3, 5, 6 & 10, of the
north east connector, RMC Lonestar mix number 3415 was used, at bent 4, of the north east connector, RMC Lonestar
mix number 6251 was used and at bent 18, of the south east connector, RMC Lonestar mix number 29866 was used.
Concrete mix designs are included in Section 3 of this report.

At the five locations on the north east connector only the mix design was changed. Data at these locations was
collected at four depths along one edge of the structure and at the same depths near the center of the structure. This data
presents a “global” temperature distribution in the structure.

At bent 18 of the south east connector auxiliary cooling of the structure was provided. The cooling equipment
circulated chilled water through three 1-inch diameter black steel pipe mats within the structure (see Figure 2 for
schematic of this equipment). In addition to the “global” temperature values at the other locations, data was collected
between the pipes circulating the cooling fluid.

The data presented in the following pages represents a portion of a continuing California Department of
Transportation study of concrete curing temperatures in mass concrete pours.

Figure 1. Location of work

 WATER
TANK

CHILLER

CIRCULATING SUPPLY MANIFOLD

PUMP

RETURN MANIFOLD

FOOTING

1” PIPE MAT

1” RUBBER HOSE
FROM MANIFOLD
TO FOOTING

Figure 2. Schematic diagram of cooling equipment (no scale). The flow in each of the cooling pipe mats was
approximately 15 gallons per minute.
II. EQUIPMENT LIST

Data Logger
Campbell Data Logger Model 21X
With 16 channel input multiplexer Model AM416

Thermocouple Wire
Type T Thermocouple wire

Computers:
Fieldworks computer -- Pentium 166 with Windows 95

Data Acquisition Software

Campbell PC-208W

Digital Camera
Kodak DC200 Camera with Picture Easy 2 software

Data Reduction & Report Preparation Software

Microsoft Excel Office 97 Version
Microsoft Word Office 97 Version
III. CONCRETE MIX DESIGNS
4750 Nords Canyon Road. Suite A

RMC LONESTAR San Ramon. California 94583

(925) 866-2780 FAX (925) 866-2983
TECHNICAL SERVICES

Report No 52161
Mix Number 3415 06/18/1999
Group 238
05081817
CALTA 1.5 6.18 C+F 35% RET
FCI #04-233924 INTERCHANGE ALTS
ATTN: DAVE HORN 580-680 PLEASANTON
DUBLIN

MATERIALS DESCRIPTION
CEMENT TYPE II MODIFIED ASTM C-150
POZZ INTERNATIONAL FLYASH ASTM C-618 CLASS F
CALMAT 1 1/2" X 3/4" ASTM C-33 SIZE 4
CALMAT 1" X #4 ASTM C-33 SIZE 57
CALMAT CONCRETE SAND ASTM C-33
POZZOLITH 300R ASTM C-494 TYPE D

This mix will produce concrete meeting the design Cementitious Material 6.18 sk
criteria when produced, sampled and tested in Maximum Size Aggregate 1.5 in.
accordance with ASTM C-94 and UBC. Mix will be Slump 3.50 ± 0.50 in.
adjusted as required by UBC Section 2604 to W/C+F ratio 0.46
maintain the noted strength level. Entrained Air n/a

Code Material Solid Volume SSD Quantity

1011 CEMENT TYPE II MODIFIED 1.92 cf 378 lbs

9001 POZZ INTERNATIONAL FLYASH 1.41 cf 203 lbs
1126 CALMAT 1 1/2" X 3/4" 4.48 cf 750 lbs
1127 CALMAT 1" X #4 6.85 cf 1150 lbs
2112 CALMAT CONCRETE SAND 7.78 cf 1296 lbs
9046 POZZOLITH 300R 0.00 cf 17 oz
Air (1.00 %) 0. 27 cf
Water (32.0 gal.) 4.29 cf 267 lbs

Totals 27.00 cf 4044 lbs

Uses: MASS CONCRETE.

Note: REPLACES REPORT 46352 MIX 6251.
Note: MIX FOR PUMP OR TAILGATE PLEASE HAVE YOUR CONCRETE PUMPING
COMPANY VERIFY THE PUMPABILIT OF THIS MIX.
Note: PLEASE FORWARD STRENGTH DATA TO RMC LONESTAR TECHNICAL
SERVICES FOR STATISTICAL ANALYSIS PER ASTM C-94 SECTION 14.4

Additions
 4750 Nords Canyon Road. Suite A

RMC LONESTAR San Ramon. California 94583

(925) 866-2780 FAX (925) 866-2983
TECHNICAL SERVICES

Group 238 Mix Number 6251 Report No 46352

06/26/1998
CALTA 1.5 6.18 C+F 25% RET 05061817

FCI CONSTRUCTION #04-233924 INTERCHANGE ALTS

ATTN: CURT 580-680 PLEASANTON DUBLIN

MATERIALS DESCRIPTION
CEMENT TYPE II MODIFIED ASTM C-150
POZZ INTERNATIONAL FLYASH ASTM C-618 CLASS F
CALMAT 1 1/2" X 3/4" ASTM C-33 SIZE 4
CALMAT 1" X #4 ASTM C-33 SIZE 57
CALMAT CONCRETE SAND ASTM C-33
POZZOLITH 300R ASTM C-494 TYPE D

This mix will produce concrete meeting the design Cementitious Material 6.18 sk
criteria when produced, sampled and tested in Maximum Size Aggregate 1.5 in.
accordance with ASTM C-94 and UBC. Mix will be Slump 3.50 ± 0.50 in.
adjusted as required by UBC Section 2604 to W/C+F ratio 0.46
maintain the noted strength level. Entrained Air n/a

Code Material Solid Volume SSD Quantity

1011 CEMENT TYPE II MODIFIED 2.21 cf 435 lbs

9001 POZZ INTERNATIONAL FLYASH 1.01 cf 145 lbs
1126 CALMAT 1 1/2" X 3/4" 4.48 cf 750 lbs
1127 CALMAT 1" X #4 6.85 cf 1150 lbs
2112 CALMAT CONCRETE SAND 7.90 cf 1316 lbs
9046 POZZOLITH 300R 0.00 cf 17 oz
Air (1.00 %) 0. 27 cf
Water (32.0 gal.) 4.28 cf 267 lbs

Totals 27.00 cf 4063 lbs

Uses: MASS CONCRETE.

Note: · MIX FOR PUMP OR TAILGATE PLEASE HAVE YOUR CONCRETE PUMPING
COMPANY VERIFY THE PUMPABILIT OF THIS MIX.
Note: · PLEASE FORWARD STRENGTH DATA TO RMC LONESTAR TECHNICAL
SERVICES FOR STATISTICAL ANALYSIS PER ASTM C-94 SECTION 14.4

Additions
 4750 Nords Canyon Road. Suite A

RMC LONESTAR San Ramon. California 94583

(925) 866-2780 FAX (925) 866-2983
TECHNICAL SERVICES

Group 238 Mix Number 29866 Report No 58238

06/19/2000
MOD 8.5 C+F+MET ½” DELVO SP 21085058

FCI CONSTRUCTION #04-233924 INTERCHANGE ALTS

ATTN: DAVE HORN 580-680 PLEASANTON DUBLIN, CA

MATERIALS DESCRIPTION
CEMENT TYPE II MODIFIED ASTM C-150
POZZ INTERNATIONAL FLYASH ASTM C-618 CLASS F
METAKAOLIN
CLAYTON ROCK 1/2" X #4 ASTM C-33
ELIOT CONCRETE SAND ASTM C-33
DELVO STABILIZER ASTM C 494
RHEOBUILD 1000 ASTM C-494 TYPE F

This mix will produce concrete meeting the design Cementitious Material 8.50 sk
criteria when produced, sampled and tested in Maximum Size Aggregate 1/2 in.
accordance with ASTM C-94 and UBC. Mix will be Slump See Note in.
adjusted as required by UBC Section 1905 to W/C+F+MET 0.31
maintain the noted strength level. Entrained Air n/a

Code Material Solid Volume SSD Quantity

1011 CEMENT TYPE II MODIFIED 3.05 cf 600 lbs

9001 POZZ INTERNATIONAL FLYASH 1.11 cf 160 lbs
9844 METAKAOLIN 0.26 cf 40 lbs
1203 CLATON ROCK 1/2" X #4 9.12 cf 1600 lbs
2107 ELIOT CONCRETE SAND DELVO 9.18 cf 1529 lbs
8112 STABILIZER 0.00 cf 24 oz
9053 RHEOBUILD 1000 192 oz
Air (1.00 %) 0. 27 cf
Water (30.0 gal.) 4.01 cf 250 lbs

Totals 27.00 cf 4179 lbs

Uses: MASS CONCRETE.TEST FOOTING

Note: SLUMP WILL BE FLOWABLE
Note: · MIX FOR PUMP OR TAILGATE PLEASE HAVE YOUR CONCRETE PUMPING
COMPANY VERIFY THE PUMPABILIT OF THIS MIX.
Note: · HOLD WATER TO DESIGN. THEN ADD HRWR FOR A FLOWABLE MIX.
HRWR DOSAGE APPROXIMATE
Note: METRIC MIX BATCHED AND ORDERED IN POUNDS/CUBIC YARDS. ONE
CUBIC YARD APPROXIMATELY 0.75 CUBIC METERS.

Additions
IV. FIELD DIARY

NORTH EAST CONNECTOR BENT 4

6 July 1999
Installed data acquisition equipment at the site
7 July 1999
Contractor poured footing
3 August 1999
Data acquisition equipment was removed from site
NORTH EAST CONNECTOR BENT 3
15 July 1999
Installed data acquisition equipment at the site
16 July 1999
Contractor poured footing
2 August 1999
Data acquisition equipment was removed from site
NORTH EAST CONNECTOR BENT 5
3 August 1999
Installed data acquisition equipment at the site
4 August 1999
Contractor poured footing
17 August 1999
Data acquisition equipment was removed from site
NORTH EAST CONNECTOR BENT 6
18 August 1999
Installed data acquisition equipment at the site
26 August 1999
Contractor poured footing
8 September 1999
Data acquisition equipment was removed from site
NORTH EAST CONNECTOR BENT 10
21 September 1999
Installed data acquisition equipment at the site
22 September 1999
Contractor poured footing
4 October 1999
Data acquisition equipment was removed from site
SOUTH EAST CONNECTOR BENT 18
15 November 2000
Installed data acquisition equipment at the site
16 November 2000
Contractor poured footing
28 November 2000
Data acquisition equipment was removed from site
V. PHOTOGRAPHS

Figure 3. Typical footing and bridge column rebar prior to mass pour.
Figure 4. Data acquisition equipment. In the top photo the Campbell Datalogger is shown configured for 8
channels of temperature data. In the bottom photo the multiplexer is used to monitor 25 channels of data.

11
Figure 5. Components of the cooling system, Bent 18 . Top the chiller and the generator used to power it along
side of the water tank. Bottom the supply and return manifolds.

12
Figure 6. Typical completed footing.

13
VI. FOOTING/THERMOCOUPLE LAYOUT

The overall dimensions of the six footings studied are shown in Table 1 below.

The thermocouple installation was done after the contractor had completed all of his work prior to pouring the
concrete. Thermocouple wire was attached to surplus rebar, with nylon cable zip ties, and lowered into position
from on top of the top reinforcement mat.

The bars used for the “global” temperature data where surplus hooks that connected the top and bottom reinforcing
mats, the top and bottom thermocouples where connected to the bar approximately 9-inches from each end. The
middle two thermocouples where each installed 1/3 of the distance between these, one was 1/3 up from the bottom
and the other was 1/3 down from the top.

To measure the temperature gradient between the cooling pipes in bent 18 of the south east connector a shorter (4-
foot) surplus bar was used. Since adjacent pipes where 3 feet apart, the outside thermocouples where attached 30-
inches apart and the two interior thermocouples where positioned 10 inches inside either of these.

The active connection in the end of the thermocouple wire was 2 to 3 inches beyond the connection of the wire and
the rebar. This was done to minimize any localized effect from the conduction of heat through the reinforcing steel;
it does however mean that the final position could be several inches from the intended position.

Location Length Width Depth

North East Connector Bent 3 35’-6” 26’-0” 10’-0”

North East Connector Bent 4 35’-6” 26’-0” 10’-0”
North East Connector Bent 5 39’-0” 32’-0” 10’-0”
North East Connector Bent 6 35’-6” 36’-0” 11’-6”
North East Connector Bent 10 39’-0” 32’-0” 10’-0”

South East Connector Bent 18 38’-0” 38’-0” 11’-6”

Table 1. Footing dimensions

 Outside footing thermocouple
location (24-inches from face)
Inside thermocouple location
(12-inches from column cage)

Column
A

FOOTING PLAN

Column

Channel 4 Channel 8

Channel 3 Channel 7

Channel 2 Channel 6

Channel 1 Channel 5

FOOTING SECTION

FIGURE 7 - TYPICAL THERMOCOUPLE LOCATIONS - NO COOLING

NO SCALE

This drawing is accurate for thermocouple locations only.

15
 Cooling pipe

Thermocouples 9-12
Column
Thermocouples 1-4

Thermocouples 5-8
Thermocouple 17
Thermocouple 23 Thermocouples 19-22
Thermocouples 13-16 (right to left)
(left to right)

Thermocouple 18 Thermocouple 24
(on pipe) (on pipe)

FOOTING PLAN

Thermocouples 13-16 Thermocouples 19-22

(left to right) Column (right to left)

Thermocouple 17
Thermocouple 4 Thermocouple 8

Thermocouple 3 Cooling pipe Thermocouple 7

Thermocouple 6
Thermocouple 2 Thermocouple 23

Thermocouple 1 Thermocouple 5

FOOTING SECTION

FIGURE 8 - THERMOCOUPLE LOCATIONS (BENT 18)– COOLING INCLUDED

NO SCALE

This drawing is accurate for thermocouple locations only.

16
VII. SAMPLE DATA TABLE
30-Dec-98
Julian Day hour Date Ref Temp Ch 1 Ch 2 Ch 3 Ch 4 Ch 5 Ch 6 Ch 7 Ch 8

265 1300 9/21/99 1:00 PM 28.27 27.72 29.63 30.08 29.95 27.37 28.5 28.7 28.62
265 1400 9/21/99 2:00 PM 30.02 29.24 31.89 33.43 33.53 29.79 30.69 30.89 30.92
265 1500 9/21/99 3:00 PM 30.7 30.55 32.57 32.12 32.87 29.82 30.52 30.62 30.52
265 1600 9/21/99 4:00 PM 31.57 31.97 32.09 32.29 32.49 30.45 32.99 31.12 31.17
265 1700 9/21/99 5:00 PM 31.96 29.01 30.34 31.64 30.94 29.76 30.24 30.54 29.94
265 1800 9/21/99 6:00 PM 30.14 27.03 27.13 27.2 27.25 27.3 27.33 27.15 26.9
265 1900 9/21/99 7:00 PM 27.33 24.46 24.46 24.41 24.38 24.94 24.86 24.66 24.36
265 2000 9/21/99 8:00 PM 24.94 22.76 22.73 22.68 22.53 23.32 23.19 22.96 22.63
265 2100 9/21/99 9:00 PM 22.86 21.02 20.97 20.95 20.79 21.66 21.46 21.2 20.85
265 2200 9/21/99 10:00 PM 21.27 20.05 20.05 20 19.89 20.51 20.35 20.23 20.05
265 2300 9/21/99 11:00 PM 19.82 18.36 18.26 18.18 18.08 18.8 18.59 18.39 18.13
265 2400 9/22/99 12:00 AM 18.55 17.55 17.47 17.45 17.37 17.93 17.73 17.57 17.42
266 100 9/22/99 1:00 AM 17.74 17.15 17.07 17.02 16.92 17.43 17.23 17.07 16.97
266 200 9/22/99 2:00 AM 17.32 17.29 17.24 17.19 17.14 17.32 17.24 17.16 17.09
266 300 9/22/99 3:00 AM 16.97 17 16.94 16.89 16.82 17.1 17.05 16.92 16.79
266 400 9/22/99 4:00 AM 16.8 17.06 16.98 17.01 16.93 17.14 17.09 17.01 16.91
266 500 9/22/99 5:00 AM 16.65 17.06 17.03 17.03 16.98 17.03 17.03 16.98 16.98
266 600 9/22/99 6:00 AM 16.97 17.15 17.2 17.3 17.2 17.18 17.33 17.33 17.3
266 700 9/22/99 7:00 AM 16.9 17.08 16.95 16.95 16.85 16.92 17.05 16.98 16.95
266 800 9/22/99 8:00 AM 17.01 16.34 16.67 17.16 17.47 19.62 16.54 16.16 16.23
266 900 9/22/99 9:00 AM 17.56 19.82 16.38 16.28 16.97 19.82 16.94 16.33 17.02
266 1000 9/22/99 10:00 AM 18.61 19.94 16.82 16.82 18.36 19.97 16.97 16.58 18.25
266 1100 9/22/99 11:00 AM 18.55 20.14 18.91 18.86 18.09 20.22 18.42 17.78 18.65
266 1200 9/22/99 12:00 PM 20.42 20.27 19.14 19.76 19.14 20.5 18.91 19.48 18.71
266 1300 9/22/99 1:00 PM 22.59 20.58 19.35 19.91 19.89 21.11 19.17 19.61 19.5
266 1400 9/22/99 2:00 PM 24.71 21.15 19.57 20.06 20.64 22.07 19.42 19.78 22.43
266 1500 9/22/99 3:00 PM 27.32 22.06 19.86 20.35 21.22 23.33 19.81 20.2 22.69

17
VIII. DATA PLOTS

Location Data Presented Page

North East Connector Bent 3 Temperature Values 19

North East Connector Bent 3 Temperature Differences 20

North East Connector Bent 4 Temperature Values 21

North East Connector Bent 4 Temperature Differences 22

North East Connector Bent 5 Temperature Values 23

North East Connector Bent 5 Temperature Differences 24

North East Connector Bent 6 Temperature Values 25

North East Connector Bent 6 Temperature Differences 26

North East Connector Bent 10 Temperature Values 27

North East Connector Bent 10 Temperature Differences 28

South East Connector Bent 18 Temperature Values 29

Table 2. Index of plots.

The plots of temperature difference that follow include a plot which represents the difference between the two
extreme values and a second plot that show the difference between the 2 nd highest temperature measurement
and the second lowest.

18
 Dublin Footing Temps
Bent 3

70
Ref
Temp
Ch 1
60
Ch 2

Ch 3
50 Ch 4

Ch 5

40 Ch 6

Ch 7

Ch 8
30

20

10

Date

19
 Dublin Footing Temps
Bent 3
25

20

15

10

2high-2low
high-low

Date

20
 Dublin Footing Temps
Bent 4
60

50

Ref Temp
40 Ch 1
Ch 2
Ch 3
Ch 4
30 Ch 5
Ch 6
Ch 7
Ch 8
20

10

Date

21
 Dublin Footing Temps
Bent 4
25

20

15

10

2high-2low
high-low

Date

22
 Dublin Footing Temps
Bent 5
70

60

Ref Temp
50
Ch 1
Ch 2
Ch 3
40
Ch 4
Ch 5
Ch 6
30 Ch 7
Ch 8

20

10

Date

23
 Dublin Footing Temps
Bent 5
25

20

15

10

2high-2low
high-low

Date

24
 Dublin Footing Temps
Bent 6
70

60

50 Ref Temp
Ch 1
Ch 2
40 Ch 4
Ch 5
Ch 6
30 Ch 7
Ch 8

20

10

Date

25
 Dublin Footing Temps
Bent 6
30

25

20

15

10
2 high - 2 low
high - low

Date

26
 Dublin Footing Temps
Bent 10
70

Ref
60 Temp
Ch 1

Ch 2
50 Ch 3

Ch 4

Ch 5
40
Ch 6

Ch 7
30
Ch 8

20

10

Date

27
 Dublin Footing Temps
Bent 10
25

20

15

10

2 high - 2 low
high - low

Date

28
 Dublin Footing Temps REFTEMP
Bent 18 TC_1
TC_2
70
TC_3
TC_4
TC_5
60
TC_6
TC_7
TC_8
50
TC_9
TC_10
TC_11
40
TC_12
TC_13
TC_14
30
TC_15
TC_16
TC_17
20 TC_18
TC_19
TC_20
10 TC_21
TC_22
TC_23
0 TC_24
TC_25

29
IX. DATA ACQUISITION PROGRAMS
Campbell Datalogger program for 8 temperature channels prepared using the PC208W program.

;{21X}
*Table 1 Program
01: 3600 Execution Interval (seconds)

1: Internal Temperature (P17)

1: 1 Loc [ reftemp ]

2: Thermocouple Temp (DIFF) (P14)

1: 8 Reps
2: 1 5 mV Slow Range
3: 1 DIFF Channel
4: 1 Type T (Copper- Constantan)
5: 1 Ref Temp (Deg. C) Loc [ reftemp ]
6: 2 Loc [ temp1_1 ]
7: 1 Mult
8: 0 Offset

3: Batt Voltage (P10)

1: 10 Loc [ batvol ]

4: Do (P86)
1: 10 Set Output Flag High

5: Real Time (P77)

1: 110 Day,Hour/Minute (midnight = 0000)

6: Sample (P70)
1: 10 Reps
2: 1 Loc [ reftemp ]

*Table 2 Program
01: 0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

1 [ reftemp ] RW-- 2 1 ----- ------ ---

2 [ temp1_1 ] RW-- 1 1 Start ------ ---
3 [ temp1_2 ] RW-- 1 1 ----- Member ---
4 [ temp1_3 ] RW-- 1 1 ----- Member ---
5 [ temp1_4 ] RW-- 1 1 ----- Member ---
6 [ temp1_5 ] RW-- 1 1 ----- Member ---
7 [ temp1_6 ] RW-- 1 1 ----- Member ---
8 [ temp1_7 ] RW-- 1 1 ----- Member ---
9 [ temp1_8 ] RW-- 1 1 ----- ------ End
10 [ batvol ] -W-- 0 1 ----- ------ ---
11 [ _________ ] ---- 0 0 ----- ------ ---
12 [ _________ ] ---- 0 0 ----- ------ ---
13 [ _________ ] ---- 0 0 ----- ------ ---
14 [ _________ ] ---- 0 0 ----- ------ ---

30
Campbell Datalogger program for 32 temperature channels prepared using the PC208W program.
;{21X}
;
*Table 1 Program
01: 3600 Execution Interval (seconds)

1: Internal Temperature (P17)

1: 1 Loc [ reftemp ]

2: Batt Voltage (P10)

1: 18 Loc [ battery ]

3: Set Port (P20)

1: 1 Set High
2: 1 Port Number

4: Beginning of Loop (P87)

1: 0 Delay
2: 16 Loop Count

5: Excitation with Delay (P22)

1: 1 Ex Channel
2: 1 Delay w/Ex (units = 0.01 sec)
3: 1 Delay After Ex (units = 0.01 sec)
4: 5000 mV Excitation

6: Thermocouple Temp (DIFF) (P14)

1: 1 Reps
2: 1 5 mV Slow Range
3: 1 DIFF Channel
4: 1 Type T (Copper-Constantan)
5: 1 Ref Temp (Deg. C) Loc [ reftemp ]
6: 2 -- Loc [ TC_1 ]
7: 1.0 Mult
8: 0.0 Offset

7: Thermocouple Temp (DIFF) (P14)

1: 1 Reps
2: 1 5 mV Slow Range
3: 2 DIFF Channel
4: 1 Type T (Copper-Constantan)
5: 1 Ref Temp (Deg. C) Loc [ reftemp ]
6: 19 -- Loc [ TC_17 ]
7: 1.0 Mult
8: 0.0 Offset

8: End (P95)

9: Do (P86)
1: 10 Set Output Flag High

10: Real Time (P77)

1: 220 Day,Hour/Minute (midnight = 2400)

11: Sample (P70)

1: 34 Reps
2: 1 Loc [ reftemp ]

31
*Table 2 Program
02: 0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

1 [ reftemp ] RW-- 3 1 ----- ------ ---

2 [ TC_1 ] RW-- 1 1 ----- ------ ---
3 [ TC_2 ] R--- 1 0 ----- ------ ---
4 [ TC_3 ] R--- 1 0 ----- ------ ---
5 [ TC_4 ] R--- 1 0 ----- ------ ---
6 [ TC_5 ] R--- 1 0 ----- ------ ---
7 [ TC_6 ] R--- 1 0 ----- ------ ---
8 [ TC_7 ] R--- 1 0 ----- ------ ---
9 [ TC_8 ] R--- 1 0 ----- ------ ---
10 [ TC_9 ] R--- 1 0 ----- ------ ---
11 [ TC_10 ] R--- 1 0 ----- ------ ---
12 [ TC_11 ] R--- 1 0 ----- ------ ---
13 [ TC_12 ] R--- 1 0 ----- ------ ---
14 [ TC_13 ] R--- 1 0 ----- ------ ---
15 [ TC_14 ] R--- 1 0 ----- ------ ---
16 [ TC_15 ] R--- 1 0 ----- ------ ---
17 [ TC_16 ] R--- 1 0 ----- ------ ---
18 [ battery ] RW-- 1 1 ----- ------ ---
19 [ TC_17 ] RW-- 1 1 ----- ------ ---
20 [ TC_18 ] R--- 1 0 ----- ------ ---
21 [ TC_19 ] R--- 1 0 ----- ------ ---
22 [ TC_20 ] R--- 1 0 ----- ------ ---
23 [ TC_21 ] R--- 1 0 ----- ------ ---
24 [ TC_22 ] R--- 1 0 ----- ------ ---
25 [ TC_23 ] R--- 1 0 ----- ------ ---
26 [ TC_24 ] R--- 1 0 ----- ------ ---
27 [ TC_25 ] R--- 1 0 ----- ------ ---
28 [ TC_26 ] R--- 1 0 ----- ------ ---
29 [ TC_27 ] R--- 1 0 ----- ------ ---
30 [ TC_28 ] R--- 1 0 ----- ------ ---
31 [ TC_29 ] R--- 1 0 ----- ------ ---
32 [ TC_30 ] R--- 1 0 ----- ------ ---
33 [ TC_31 ] R--- 1 0 ----- ------ ---
34 [ TC_32 ] R--- 1 0 ----- ------ ---
35 [ _________ ] ---- 0 0 ----- ------ ---
36 [ _________ ] ---- 0 0 ----- ------ ---
37 [ _________ ] ---- 0 0 ----- ------ ---
38 [ _________ ] ---- 0 0 ----- ------ ---
39 [ _________ ] ---- 0 0 ----- ------ ---
40 [ _________ ] ---- 0 0 ----- ------ ---
41 [ _________ ] ---- 0 0 ----- ------ ---
42 [ _________ ] ---- 0 0 ----- ------ ---
43 [ _________ ] ---- 0 0 ----- ------ ---

32