VCR/LTER Meteorological, Tide Gage
and Pumping Station
Operations Manual
2-5-93
Table of Contents
Log Sheet - Met Stations................ 2
Log Sheet - Tide Stations............... 4
Log Sheet - Pumping Station............. 5
Tranferring Data to the Computer........ 6
Wiring of Met Stations.................. 7
Wiring of Tide Stations................. 8
Wiring of Pumping Stations............. 10
Data Validation........................ 11
Calibration Procedures..................13
Computer-Station Interfaces.............21
Meteorological Site Visit Logsheet 1-28-93 version
Station: Phillips Creek Hog Island Oyster Lab
Collection Date:__/__/__ (MM/DD/YY) Collection Time (EST):______
Data Collected By:______________________
Manual Data
Psychron: T-dry______ T-wet________ %RH_________
Data Logger
A. *5 Mode Time:________ Julian Date:__________ Year:_______
B. *6 Mode:
CH/DES VALUE COMPARISON VALUE OKAY?
--------------------------------------------------------------
01/Volt | | >11.8 vdc |
--------------------------------------------------------------
02/21X T | | +/- 2 deg. of Psychron dry bulb |
--------------------------------------------------------------
03/Soil T | | |
--------------------------------------------------------------
04/Amb T | | +/- 2 deg. of Psychron dry bulb |
--------------------------------------------------------------
05/RH | | +/- 10% of Psychron RH |
--------------------------------------------------------------
06/WS | | use judgement |
--------------------------------------------------------------
08/WD | | use judgement |
--------------------------------------------------------------
12/SR | | 0-3800 |
--------------------------------------------------------------
13/PAR | | 0-6999 |
--------------------------------------------------------------
15/PREC | | 0 unless raining |
--------------------------------------------------------------
| | 1.1 Phillips Creek Met |
17/ID | | 2.1 Hog Island Met |
| | 4.1 Oyster Lab Met |
==============================================================
Ram Pack Exchange
Old R-Pack ID#:___________ New R-Pack ID#:_______________
Ram Pack Usage
1.To dump data to Ram Pacl prior to power down:
key in on datalogger *9 30 A A A 1 A
2.To load program from Ram Pack to dataloger:
key in on datsalogger *D 71 A 28 A
Comments or Service Performed
Psychrometer RH Look-up Table
T-(dry)-(T-wet)
0 .5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
T-dry | | | | | | | | | | | | | | |
-5 100 88 77 65 54 43 33 22 11 1 | | | | |
-4 100 89 78 67 57 46 36 26 16 6 | | | | |
-3 100 89 79 69 59 49 39 30 20 11 1 | | | |
-2 100 90 80 70 61 52 42 33 24 15 6 | | | |
-1 100 90 81 72 63 54 45 36 28 19 11 2 | | |
0 100 91 82 73 64 56 48 39 31 23 15 7 | | |
1 100 91 83 74 66 58 50 42 34 27 19 11 4 | |
2 100 91 83 75 68 60 52 45 37 30 23 15 8 1 |
3 100 92 84 76 69 62 54 47 40 33 26 19 12 6 |
4 100 92 85 77 70 63 56 49 42 36 29 23 16 10 3
5 100 92 85 78 71 65 58 51 45 38 32 26 20 14 8
6 100 93 86 79 72 66 60 53 47 41 35 29 23 17 11
7 100 93 86 80 73 67 61 55 49 43 37 32 26 20 15
8 100 93 87 81 74 68 62 57 51 45 40 34 29 23 18
9 100 93 87 81 75 70 64 58 53 47 42 36 31 26 21
10 100 94 88 82 76 71 65 60 54 49 44 39 34 29 24
11 100 94 88 82 77 72 66 61 56 51 46 41 36 31 27
12 100 94 88 83 78 72 67 62 57 52 48 43 38 34 29
13 100 94 89 83 78 73 68 63 59 54 49 45 40 36 31
14 100 94 89 84 79 74 69 64 60 55 51 46 42 38 33
15 100 94 89 84 80 75 70 66 61 57 52 48 44 40 35
16 100 95 90 85 80 75 71 66 62 58 54 49 45 41 37
17 100 95 90 85 81 76 72 67 63 59 55 51 47 43 39
18 100 95 90 86 81 77 72 68 64 60 56 52 48 44 41
19 100 95 90 86 82 77 73 69 65 61 57 53 50 46 42
20 100 95 91 86 82 78 74 70 66 62 58 55 51 47 44
21 100 95 91 87 82 78 74 71 67 63 59 56 52 49 45
22 100 95 91 87 83 79 75 71 67 64 60 57 53 50 46
23 100 95 91 87 83 79 76 72 68 65 61 58 54 51 48
24 100 95 91 87 84 80 76 72 69 65 62 59 55 52 49
25 100 95 92 88 84 80 77 73 69 66 63 59 56 53 50
26 100 96 92 88 84 81 77 74 70 67 63 60 57 54 51
27 100 96 92 88 84 81 77 74 71 67 64 61 58 55 52
28 100 96 92 88 85 81 78 74 71 68 65 62 59 56 53
29 100 96 92 89 85 82 78 75 72 69 65 62 59 57 54
30 100 96 92 89 85 82 79 75 72 69 66 63 60 57 55
31 100 96 92 89 86 82 79 76 73 70 67 64 61 58 55
32 100 96 92 89 86 83 79 76 73 70 67 64 62 59 56
33 100 96 93 89 86 83 80 77 74 71 68 65 62 59 57
34 100 96 93 89 86 83 80 77 74 71 68 65 63 60 57
35 100 96 93 90 86 83 80 77 74 71 69 66 63 61 58
36 100 96 93 90 87 84 81 78 75 72 69 66 64 61 59
37 100 96 93 90 87 84 81 78 75 72 70 67 64 62 59
38 100 96 93 90 87 84 81 78 75 73 70 67 65 62 60
39 100 96 93 90 87 84 81 78 76 73 70 68 65 63 60
40 100 96 93 90 87 84 82 79 76 73 71 68 66 63 61
Tide Station Site Visit Logsheet 1-28-93 version
Station: Hog Island Red Bank:
Collection Date:__/__/__ (MM/DD/YY) Collection Time (EST):______
Data Collected By:______________________
================================================================
A. Staff Reading:_____________meters
B. *5 Mode:
Time:________ Julian Date:__________ Year:_______
C. *6 Mode:
CH/DES VALUE COMPARISON VALUE OKAY?
-------------------------------------------------------------
01/Bat Volt | | >11.8 vdc |
-------------------------------------------------------------
04/Water T | | reasonable |
-------------------------------------------------------------
05/Tide Level | | reasonable |
-------------------------------------------------------------
06/Bar Press | | 26-32" Hg |
-------------------------------------------------------------
17/Station ID | | 3.1 Hog Island Tide Gage|
| | 5.1 Red Bank Tide Gage |
-------------------------------------------------------------
D. Ram Pack Exchange: Old ID#:_______ New ID#:_______
E. Ram Pack Usage:
1. To dump data to Ram Pack Prior to power down
key in on datalogger *9 30 A A A 1 A
2. To load program from Ram Pack to datalogger
key in on datalogger *D 71 A 28 A
F. Comments or Service Performed:
Pumping Station Site Visit Logsheet 2-5-93 version
Station: Parramore #1
Collection Date:__/__/__ (MM/DD/YY) Collection Time (EST):____
Data Collected By:____________________
A. *5 Mode Time:________ Julian Date:________ Year:_______
B. *6 Mode:
CH/DES VALUE COMPARISON VALUE OKAY?
---------------------------------------------------------------
01/Volt | | >11.8 |
---------------------------------------------------------------
02/Flow | | 0-10 lpm |
---------------------------------------------------------------
03/Cond. | | 0-5000 uS |
---------------------------------------------------------------
04/Depth | | 0-3 meters |
---------------------------------------------------------------
05/Prec | | 0 unless raining |
---------------------------------------------------------------
17/ID | | 6.1 |
---------------------------------------------------------------
C. Ram Pack Data Dump: Yes/No
D. Ram Pack Usage:
1. To dump data to Ram Pack Prior to power down
key in on datalogger *9 30 A A A 1 A
2. To load program from Ram Pack to datalogger
key in on datalogger *D 71 A 28 A
E. Comments or Service Performed:
Transferring Data to Computer
1. After booting the computer, change to the METDATA
directory and run the SMCOM program.
SMCOM is menu driven, prompts and responses are as
follows:
Serial Port: 2 -- COM 2
SM232 or SM232A: N
Root Collection File Name: see definition below
SMCOM Options: U - collect all uncollected data
files
Format: C - Comma delineated ASCII
2. Defining the computer File Name:
The file name is 8 characters long, defined as
follows:
1) The first letter is the site's initial:
P - Phillips Creek
H - Hog Island
O - Oyster Lab
R - Red Bank
B - Brownsville
T - Parramore Island (Teach's)
2) The second letter is either:
M - Met Data
T - Tide Data
P - Pumping Data
3) The third and fourth characters are the month
number of the current month;
4) The next two are the current year;
5) The final two characters are supplied by the
SMCOM program and are "01" typically. A
suffix of DAT will be automatically appended
by SMCOM.
For example, if you downloaded data on August 17,
1989 from the Hog Island Met Station, the file name you provide
would be:"HM0889", the computer will append "01.DAT" to give a
full filename of: HM088901.DAT. Mail copies of data to U. Va.
Wiring of Meteorological Stations
20-Terminal Spark-Gap Protected Strip
sensor wires 21X ch harness wire color
1 HMP35C black ------ EX 1 blue+purple
2 HMP35C orange (temp) ------ H 1 oran+purple
3 HMP35C green (RH) ------ L 1 purp+green
4 HMP35C yellow ------ EX 3 purp+orange
5 HMP35C red ------ +12 vdc brn+white
6 ------
7 RAIN black ------ PLS 3 white+grn
8 W/S green ------ H 2 purp+blue
9 W/S black ------ EX 2 brwn+purple
10 W/S red ------ PLS 1 white+gray
11 SOL red ------ H 3 blue+black
12 PAR red ------ L 3 black+gray
13 SOIL black ------ EX 1 orange+red
14 SOIL red ------ L 2 green+black
15 ------
16 ------
17 ------
18 ------
19 ------
20 ------
10-Terminal Ground Strip
sensor wires 21X ch harness wire color
1 HMP35C wht/clr/purp ------ GND black+brn
2 RAIN white+shld ------ GND black+blue
3 W/S blk of red/blk ------ GND gray+black
4 W/S blk of grn/blk ------ jumper to (3)
5 W/S clear ------
6 SOL blk, white ------
7 PAR blk, white ------
8 SOIL purp, clear ------
9 ------ jumper to bus bar
10 ------
Wires Connected to the Metal Bus Bar:
1. #2 copper wire to copper ground rod.
2. jumper to #9 on 10-T strip.
Misc. wiring notes:
1. Green ground wire in 21X enclosure to 21X ground.
2. Solar Panel - plug to 21XL base directly. White lead is
ground, black lead is positive.
Wiring of Tide Stations
(Hog Island)
TO 21X
21X+
pur
| 4L 8L 2L X1
_____________ ______| gry yl bl or
| | | | | | | | | | | | | | | | | |
O O O O O O O O O O O O O O O O O O
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
O O O O O O O O O O O O O O O O O O
| | | | | | | | | | | | | | | | | |
| | | BP | | BP | |
| | | red | | clr | |
| || | | | |
| || Tide | 107B 107B
107B BP grn | red blk
pur br/wh |
clr black Tide
white
TO SENSORS
(solar panel plugs directly into 21XL base)
Sensor Wiring Diagrams:
sensor wire 21X
color connection
:-------black------- Excit 1
:
Water Temp. :--------red-------- 2L
:
:-------white------- GND
purple
GND:
Tide Gauge * x-mitter 107 Ohm, 1%
:-------blue-------- 4L:
: x-mitter
:-------red--------- +12 Vdc
* black and white to sensor, no polarity
____________________________________________________________
:--------red-------- +12 Vdc
:
Barometric Pressure :-------clear------- 8L
:
:-------br/white---- Ground
black
____________________________________________________________
20-Terminal Spark-Gap Protected Strip
sensor wires 21X ch harness wire color
1 Temp black ----- EX 1 black
2 Temp red ----- 2L yellow
3 -----
4 -----
5 -----
6 B/P red ----- +12 vdc white
7 B/P clear ----- 8L green
8 -----
19 Tide red ----- +12 vdc red
20 Tide blue ----- 4L ** blue
** with 110 ohm, 1/4 W, 1% resitor from 4L to GND
10-Terminal Ground Strip
sensor wires 21X ch harness wire color
1 Temp white, purple ------ GND orange
2 B/P brn/white,black ------ GND brown
3 ------
4 ------
5 ------
6 ------
7 ------ to enclosure GND
8 ------ to enclosure GND
9 ------
10 ------
Misc. wiring notes:
1. Green ground wire in 21X enclosure to 21X ground.
2. Solar Panel - plug to 21XL base directly. White lead is
ground, black lead is positive (some have red positive, black
ground).
Wiring of Pumping Station
21XL Connections:
7L .................... (-) of mA loop for Concuctivity
8L .................... (-) of mA loop for Flow
8H .................... (-) of mA loop for Depth (blk wire)
Pulse 1 ............... Rain Gage
Control 1 ............. Purple to solid state relay (+3)
+12 vdc ............... (+) of mA loop for Depth (red wire)
Ground ................ low side of 110 ohm resistors for
Conductivity, Flow, Depth
black from rain gage
yellow from solid state relay (4)
wht/blu/grn from 24 volt supply
Flow Transmitter Connections:
brown wires for current loop
Conductivity Transmitter Connections:
orange wires for current loop
Pump Connections:
panel...........LCB.............switch......relay......pump
(+) (in red, out orange) (in 2, out 1) (+)
panel...........LCB....................................pump
(-) (in white, out brwn) (-)
24vdc Power Supply Connections:
2 MSX5 Panels...(+)...M2 Reg. (in red, out ornge)...battery (+)
|
| .........(-)...M2 Reg. (in white, out brn)...battery (-)
Data Validation
This program is run in QBASIC and called "MVAL1" (met data)
or "TVAL1" (tide data). Raw data files are copied to the
C:\LTER\Programs\VALIDATE directory. The program asks for the
filename of file to be validated. A ".VAL" file is created for
each raw (".DAT") file processed. Validation of files is noted
on the Data Validation Logsheet in the computer logbook main-
tained at UVA. VAL files are passed on to John Porter for stor-
age. A list of field error checks follows:
MVAL: ("?" IN A FIELD RESULTS IN A FLAG)
FIELD RANGE FILLER IF BAD FLAG
ARY numeric 999 --
ID numeric 9 ID
Y numeric 9999 --
DAY numeric, 1 to 366 999 DAY
TIME numeric, on hour
0-2399 hours 9999 TIME
BAT numeric, >10.8 99 BAT
PANEL numeric, <37.7 99(non num.) 21X T
SOIL numeric, -33 to 48 99 SOIL
T numeric, -33 to 48 99 AMB T
RH numeric, 10 to 105 999 RH
WS numeric, 0 to 60 999 WS
MAXT numeric, MAXT>MINT 99 MAXT
MAXRH numeric 999 MAXRH
MAXWS numeric 999 MAXWS
MINT numeric 99 MINT
MINRH numeric 999 MINRH
MINWS numeric 999 MINWS
MEANWS numeric 999 MEANWS
WVEC numeric 999 WVEC
WDIR numeric 999 WDIR
WSTD numeric 999 WSTD
SOL numeric
-100 to 3800 9999 SOL
PAR numeric
-100 to 6999 9999 PAR
RAIN numeric 9999 RAIN
===========================================================
TVAL: ("?" IN A FIELD RESULTS IN A FLAG)
FIELD RANGE FILLER IF BAD FLAG
ID 3.1 9 ID
ARY numeric 999 --
Y numeric 999 --
DAY numeric, 1 to 366 999 DAY
TIME numeric,
0-2399 hours 9999 TIME
BAT numeric, >10.8 99 BAT
WATER T numeric, -33 to 48 99 WATER T
WATER LEVEL numeric, -2 to 2 99 WATER LEV
BP numeric, 26 to 32 99 BP
Data Validation Logsheet 6-26-92
***************************************************************
Site -------------------| | | | |
......................................
Met/Tide ---------------| | | | |
......................................
Start Jul. Day/Time ----| / | / | / | / |
......................................
End Jul. Day/Time ------| / | / | / | / |
......................................
Raw Datafile Name ------| | | | |
......................................
Raw Datafile Size ------| | | | |
......................................
Date Validated ---------| | | | |
......................................
Validated File Size ----| | | | |
......................................
Date to Final Archives -| | | | |
****************************************************************
Calibration Procedures
(Performed in the field unless otherwise noted.)
A. Schedule for Calibration of Sensors
PARAMETER CALIBRATION INTERVAL MAINTENANCE INTERVAL
Wind Speed yearly per visit *
Wind Direction yearly per visit *
Temperature yearly per visit
Relative Humidity yearly per visit
Precipitation yearly per visit
Solar Radiation every 2 years monthly *
Quantum Radiation every 2 years monthly *
Soil Temperature not required n/a
Tide Gage yearly as required
Datalogger ----------- checked as intgral part all calibrations
Batteries ----------- replaced every other year
* ----------------- rebuilt/ calibrated at factory every two
years
6-26-92
Station Instumentation Summary
Date:______________ Initials:_______________
Station Type: Met_____ Tide_____
Location: Phillips Creek Hog Island
Oyster Lab Red Bank
Instrument Serial Number Comments
============================================================
21X Datalogger | | |
------------------------------------------------------------
LI 200 Pyran | | |
------------------------------------------------------------
LI 190 Quantum | | |
------------------------------------------------------------
Wind Monitor | | |
------------------------------------------------------------
Temp/RH | | |
------------------------------------------------------------
Raingage | | |
------------------------------------------------------------
Program Version | | |
------------------------------------------------------------
Soil Temp | | |
------------------------------------------------------------
Barometric Press| | |
------------------------------------------------------------
Water Temp | | |
------------------------------------------------------------
Water Level | | ________ohms/foot |
------------------------------------------------------------
| | |
============================================================
5-22-91
Solar Radiation Sensor Calibration Logsheet
The total (200S) and quantum (190S) radiation sensors need
to be recalibrated at the Li-Cor Factory every two years. Li-Cor
will provide a Certificate of Calibration for each sensor indi-
cating the sensor output in micro-amps per energy density unit.
This should be recorded on the sensor's Calibration Logsheet and
compared to the calibration constant for that sensor when placed
in service. Any change greater than 5% should be reported to the
data archive personnel to allow flagging of data points.
Licor's address:
Li-Cor, Inc.
Box 4425
Lincoln, Nebraska, 68504
phone:(402) 467-3576
When a sensor is removed a new sensor will be placed in
service immediately at that station. Because its constant will
be different from the one removed, a new multiplier must be
calculated for the 21X program and entered into it. The 21X
multiplier is calculated as follows:
For 200S Sensor: MULT=60/(0.100*uamps)
For 190S Sensor: MULT=60/(0.604*uamps)
The multipliers must be entered into the datalogger program
in the proper location. Changes to the program must be noted in
the Station Log and on all "current" listings of that station's
21X program.
================================================================
================================================================
Sensor Model #:_______________ Sensor Serial #:______________
Sensor Location: Phillips Creek Hog Island
Date Installed:__________________
Calibration Constant:________________
21X Program Multiplier:_______________
Date Removed:__________________
Calibration Constant:________________
21X Program Multiplier:________________
Calculate % Drift=(old cal const-new cal const)*100/old cal const
% Drift:________________
Signature
_________________________
=================================================================
5-22-91
Field Calibration Check
Model HMP35C Temperature / Relative Humidity Probe
Field Check of Temperature
In the *6 MODE on the 21X advance to Channel 04 to view the
continuous readings from the temperature probe. Hold an NBS
Traceable Thermometer within 0.5m of the temperature probe, allow
to slabilize. Record the NBS temperature and the 21X temperature
on the Calibration Logsheet. If the difference is within +/-2
degees, the sensor is okay. If greater than 2 degrees, repeat
the test (maximum of three attempts). Three failures indicate a
probe out of calibration and require replacement.
Field Check of Relative Humidity
In the *6 MODE on the 21X advance to Channel 05 to view the
continuous readings from the relative humidity probe. Using the
automated psychron, measure the relative humidity within 0.5
meters of the probe. Record the psychron relative humidity and
the 21X relative humidity on the Calibration Logsheet. The two
readings should be within 10% RH of eachother. If not, repeat
the test. Three failures indicate a probe out of calibration and
require that it be replaced.
=================================================================
=================================================================
Date of Calibration Check:____________
Date of Previous Check:_______________
Sensor Location: Phillips Creek Hog Island
Sensor Serial Number:_______________
1.Temperaure Calibration Check (accurate within +/- 2 deg. C):
NBS thermometer temperature:_____________
Probe temperature:_______________
Error (Probe-NBS):________________
2.Relative Humidity Calibration Check (accurate within 10% RH):
Psychron: T-dry:______ T-wet:______ RH:______
Probe Relative Humidity: ______
Error (Probe - Psychron):______
I certify that the temperature portion of this sensor
___does___does not meet calibration requirements. I certify that
the relative humidity portion of this sensor ___does___does not
meet calibration requirements.
________________________
Signature
=================================================================
5-22-91
Field Calibration Check
R.M. Young Wind Monitor
Wind Speed:
Remove the propellor from the wind monitor and attach the
flexible hose from the calibration motor to the anemometer. Spin
the anemometer at 1800 rpm and use the Datalogger *6 MODE, Chan-
nel 06 to read the resultant wind speed indication. Record this
on the calibration check sheet. It should be within +/- 1 m/s of
8.8 m/s. Repeat up to three times to acheive a successful test.
Repeated failure indicates sensor problems. Troubleshoot and
repair as required, recheck calibration.
Wind Direction:
Wind direction is checked by having one person manually
rotate the wind monitor to four known directions (0, 90, 180, 270
degrees). Monitor the datalogger in the *6 MODE, Channel 08 to
verify correct values (within +/- 10 degrees).
=================================================================
=================================================================
Date of Calibration Check:______________
Date of Previous Calibration Check:________________
Sensor Location: Phillips Creek Hog Island
Sensor Serial Number:_____________
Technician:_________________________
1.Wind Speed Calibration Check: (accurate to +/- 1 m/s)
accuracy=21X wind speed - 8.8 m/s
1800 rpm measured wind speed on 21X:___________________
accuracy:__________________
2.Wind direction Calibration Check: (Accurate to +/- 10 degrees)
expected value 21X value accuracy
0
90
180
270
-----------------------------------------------------------------
I certify that the wind speed portion of this sensor ___does
___ does not meet calibration requirements. I certify that the
wind direction portion of this sensor ___does ____does not meet
calibration requirements.
___________________________
Signature
=================================================================
10-3-91
Precipitation Gage Calibration Check
Note: Only perform this test when not precipitating.
1. Note start time of test on the calibration logsheet.
2. Remove the outer funnel from the rain gage.
3. Check that the gage is clean and free of debris.
4. Check that the gage is level, correct as required. Note check
and corrective actions.
5. Monitor *6, Channel 15 on the datalogger. Manually tip the
bucket on the gage - 4 tips are plenty - verify that the
datalogger display is updated to show the number of tips you
performed.
6. Note the time of test stopping on the logsheet. Reassemble
the raingage.
=================================================================
Site:_______________ Date:_________________
Technician:________________
Start time:___________ Stop time:_____________
A. Gage is Level ? YES NO (note releveling if needed)
B. Gage is clean and free of debris ? YES NO (note cleaning)
C. Tips recorded by datalogger ? YES NO
===============================================================
I certify that this rain gage does_____does not_____ pass the
above tests.
-----------------------
Signature
================================================================
10-31-91
Aquatape Tide Gage Calibration
(for Gages with CSI 21X Dataloggers)
=================================================================
This calibration has two parts: one to determine the multi-
plier for the 21X program; the other to determine the offset.
=================================================================
PART I
Open the electronics housing at the tide gage and disconnect
the two wires from the sensor at the terminal strip. Short out
the two sensor input terminals to the current transmitter with a
wire jumper. At the 21X, access the program via *2 and find the
tide gage instruction:
03 P1
01: 1
02: 5
03: 8
04 5
05: .00158 (multiplier in meters/mV)
06: -.6985 (offset in meters)
Record the starting multiplier and offset below.
starting multiplier:___________
starting offset_______________
Set the multipier to 1 and the offset to 0. Monitor the *6
channel 05 and record the reading shown as Vh (in mVdc).
Vh=________________mVdc
Next, jumper the terminals with a resitor equal to 10 times
the factory supplied gradient resistance for the Aquatape Sensor
(nominally 305 ohms/ft). For example, if the gradient is 304.7
ohms/foot, the resistance should be 3047 ohms. This simulates a
10 foot (3.048m) change in water level. Record this voltage as
Vl.
Vl=________________mVdc
Now the correct 21X multiplier can be calculated:
multiplier=3.048/(Vh-Vl)
mutiplier=_________________
At this time enter the new multiplier in the 21X programs.
================================================================
PART II
To determine the offset for the 21X, a benchmark of known
elevation relative to MSL must be shot on the piling of the tide
gage. Record the elevation of the benchmark above MSL as B:
B=___________meters
The actual sea level is marked on the outside of the tide
gage stand pipe at while a technician records the output of the
datalogger (*6, CH 05). The distance between this mark and the
benchmark is recorded as E:
E=___________meters
The 21X reading as X:
X=___________meters
The 21X offset is calculated as:
Offset=B-E-X meters
Offset=_____________
This number is then entered in the 21X program as the cor-
rect offset. Verify that the new output of the 21X seems reason-
able. Be sure to note all program changes on the Tide Gage
Logsheet, and in all copies of the program.
=================================================================
Test completed by:_______________ Date:________________
=================================================================
Viewing Real-time Data on the PC Terminal
(Oyster Met Station and future RAD TEL stations)
1. Oyster Met:
A. To view the current weather data on the 21X (equivalent
to the *6 MODE data) turn on the system at the PC203 Box and wait
for the PC to boot itself. Then type WEATHER <RET>. To exit
this program, type ESC and then Q. To turn off the system, be
sure to use only the switch on the PC203 Box.
B. RS232 Cable Wiring
Computer end RS232 Interface
pin number wire color pin number Signal Carried
1 red 8 DCD
2 black 3 RX
3 white 2 TX
4 purple 20 DTR
5 yellow 1 GND
6 orange 6 DSR
7 brown 4 RTS
8 green 5 CTS
9 blue 7 RI
C. WEATHER.BAT :
cd\labmet
term labmet m labmet.dld l 1..17
2. Radiotelemtry Notes:
RF 95 MODEM
Interface between either the 21XL and radio or the computer
and radio. Must be set to "ME" (dip switch #9 to 1) and have the
proper sation codev set by the remaining 8 dip switches. Code
assignments are as follows:
Phillips Creek Met 10
Hog Island Met 20
Hog Island Tide 30
Oyster Lab Met 40
Red Bank Tide 50