Campbell CR500 User manual

CRsOO DATALOGGER
OPERATORIS.MANUAL
11/96
COPYRTGHT (c) 1996 CAMPBELL SCIENTIFIC, lNC.

LICENSE FOR USE
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treaty provisions. You may copy it onto a computer to be used and you may make archival copies
of the software for the sole purpose of backing-up CAMPBELL SCIENTIFIC, lNC. software and
protecting your investment from loss. All copyright notices and labeling must be left intact.
This software may be used by any number of people, and may be freely moved from one
computer location to another, so long as there is no possibility of it being used at one location
while it's being used at another. The software, under the terms of this license, cannot be used by
two different people in two different places at the same time.
eAMPEIELL =IGIENTIFIG, ll\|C.
a15 W. 1800 N.
Logan, UT 84321-1744
USA
Phone [phone]
FAX (43s) 7sO-954O
www.camobellsci-com
Campbell Scientilic Canada Corp.
'| 1564 -149th Street
Edmontonr Albeda TsM 'lW7
CANADA
Phone (4O3) 454-2505
FAX (4O3) 454-2655
Camobell Scientilic Ltd.
14-2O Field Street
shepshed, Leics. LE12 gAL
ENGLAND
Phone [phone]
FAX [phone]

LIMITED WARRANTY
CAMPBELL SCIENTIFIC, lNC. warrants that the magnetic diskette on which the accompanying
computer software is recorded and the documentation provided with it are free from physical
defects in materials and workmanship under normal use. CAMPBELL SCIENTIFIC, lNC.
warrants that the computer software itself will perform substantially in accordance with the
specifications set forth in the Operator's Manual published by CAMPBELL SCIENTIFIC, lNC.
CAMPBELL SCIENTIFIC, lNC. warrants that the software is compatible with IBM PC/XT/AT and
PS/2 microcomputers and 100% compatible computers only. CAMPBELL SCIENTIFIC, lNC. is
not responsible for incompatibility of this software running under any operating system other than
those specified in accompanying data sheets or operator's manuals.
The above warranties are made for ninety (90) days from the date of original shipment.
CAMPBELL SCIENTIFIC, lNC. will replace any magnetic diskette or documentation which proves
defective in materials or workmanship without charge.
CAMPBELL SCIENTIFIC, lNC. will either replace or correct any software that does not peform
substantially according to the specifications set forth in the Operator's Manualwith a corrected
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CAMPBELL SCIENTIFIC, lNC. software.
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CR500 Speciflaolions
Electrical specifications are valid
PROGRAM EXECTITION RATE
System lasks initiated in sync with feal-tim€ up to
I Fl& orle m€asuremont'wih data'trsnsler i8 pd;sible
at lhis ralo withoul in|erruplhn.
ANALOG INPIIS
NUMBER OF CHANNELS:2 difl€tential or up to 4
single-ended. Each dltferenlial channel can b€
contigured as two singl+€nded channols.
RANGE AND RESOLUTION: Ranges are software
selectable tor any chann€|. The resotution lor
diflerential measurements is better lhan
singleended moasuromenls because two
m€aSuroments arg av€rag€d tog€lher.
Fuil Scale Ra€,olutic,, (yv)
lnpd Range (mW Dltlerentia! Single-Eded
*2500 3(l3 666
t250 33.3
,25 3.33
1.00
0.33
66.6
6.66
2.OO
0.66
17.5
12.5
ACCURACY OF VOLTAGE MEASUREMENTS AND
ANALOG OUTPUT VOLTAGES: t0.1% ol FSR;
* 0.05% of FSR, (0 to /O'C); (e.9., to.l% FSR -
'*5.0 mV for r25O0 mV tange)
INFUT SAMPLE RATES: The fast and dow A/D
convers'rons uee signal htegralion times of 0.25
and 2,72 tt18, respeclivelY.
Fast differentlal voltage: 4.2 rni
Slow dilferentialvoltagel 9.2 m8
Difterential with 60 Hz toi€clion: 25.9 ms
INPUT NOISE VOLTAGE (fot r2.5 mV lang€):
Fasl differential: 0.82 PV RMS
SlorY diffoFntial: 0.25 FV RMS
Difierenlial with
60 Hz reiection: 0.1 I PV RMS
COMMON MOOE RANGE: t2.5 V.
OC COMMON MODE REJECTION: > 140 dB'
NORMAL MODE REJECTION: 70 dB (60 Hz wilh
slow ditf erential msasurgment).
INPUT CURRENT: tg nA maximum.
INPUT RESISTANCE: 20 Gohms lypical.
EXCIIAT|ON Ot TPtlS
DESCRIPTION: 2 switched excilations, actve during
measurement, with one output active at a time' Non-
active outputs are high impdance.
RANGE: i2.5 V
RESOLUTION: 0.67 mV
ACCURACY: t2.5 mV (0'to lo'C);
*5 mV G25" lo +50'C)
OUTPUT CURRENT: t25 mA
FREQUENCY SWEEP FUNCTION: A swepl fre-
quency, square wave output b€trwen 0 and 2.5
volt8 is provid€d lor vibrating wire transduceE'
Timing and lrequerEy range ate specified by lhe
instruction.
RESISIANCE AND CONDUCTIVITY
MEASUREMENIS
MEASUREMENT WPES: Using eith€r of the 2
switcied excitation channela, the CR500 can
rneasuro rosiatanc€ and conduclivily by means
of ratiometdc btidg€ moasuremenls. Standard
bridgo measurement8 include swire and 4-wire
full btidge, +wire, }wirc, and 2'wir6 haf b.idge'
where appropriat€, dual poladty btidg€ moasure'
m6nts are used lo elimihato OC onor8. AC
resistance ti€asurcm6nts use a dual polality
over a -25o to +50oC range unless otherwise sPecified.
0.75 ms excitation pube lor ionic depoladzation;
signal integralion occurs o/er ths lagl 0.25 m8.
ACCURACY: 10.02% ol lull scaleinpul range used,
limitod by tho matching bridgt€ r6istors (6.9.,
t0.02% of a250 mV tulFecale hput rango -
r'l 0O trV). The sxcitatiof, rroltage 8hordd be
programmed so th€ bddge ouiput matches the
full scale hpul voltagp.angs.
PERIOD AVERAGING MEASUREME}IS
DEFINITION: Th€ tim€ period for a sp€cilied numbet
ol cycles of an input signal lE rnea8urcd, then
divid€d by the number ot c}ll€slo obtain the
averag€ p€dod ct a slngle clEle. lmpro\red
tming resolution and nois€ rsduction can be
obtainod by averaging o/er marry c)rcl€8.
INPUTS: Any of the 4 singas-iitded analog input
chann€|s can be s€l€cled tor pedod averaging.
Signal afiplitud€ rcd|.Iction or AC coupling i8
notmally roquircd.
INPUT FREQUENCY RANGE:
Renga Minwtts(peak+eak) Max. lnpd
Co& O Max, Frcq.' fteqtencY
I 2mV SkHz
2 smv 20kHz
3 12mV
4 2000mV 40 kHz
150 kHz
'AC voltag€ must be c€ntered around CRsoo ground.
RESOLUTION: 35 ns divided by the numb€r ol
cydes mea6ured.
ACCURACY: 10.01% of reading + RESOLUTION.
TIME REQUIRED FOR MEASUREMENT: Signal
p€dod multiplied by lhe numb€r ol clcles
measured plu8 1.5 qrcles.
PUISE COUNIERS
NUMBER OF PULSE COUNTER CHANNELS:2
eight-bit or I sitteen-bit: sollware seleclable ag
switch dosure, high frequency pulse, or lo*level
AC. An additional channel (czP3) can be
sofiware contigured to read swilch dosurG at
rat68 up to 40 Hz.
MAXIMUM COUiIT RATE: t6 kHz, eight-Ul counlec
250 kHz, sixleen-Ul counter. Channela are
scanned at I or E4 Hz (softwate solectau€).
MODES: Swibh clcur€, high frequency pulso, and
low l€vol AC.
SWITCH CLOSURE MOOE
Minimum Swit€h Clooed Tim6:5 m8.
Minimum Switdr Op€n Tim€:6 rE.
Modmum Sounce Time: I ms open
without b€ing counted.
HIGH FREQUENCY PULSE MOOE
Minirnum Pulso Widlh: I u8.
Maximum Input F equency:500 kHz,
voltag€ Thresholds: Counl upon transition
fto.n b€low 1.5 V lo abo\re 35 V.
Maximrm Inpd Volag€: l20 V.
LOW LEV€LAC MODE
. (Typicalol magnetic pulse.tlow lranEducers or
other low voltage, sine wave oulpuls.)
Inpul Htstereds: I mV.
Maimum AC Input Voltag€: 20 V RMS.
Mininun AC lnpn Voltago Range (Hz)
(sine wave mV BMS)'
20 t to 1000
200
1000 0.5 to 10,000
0.3lo 20.000
'l6.tfi config. or A4 Hz 8ca4 ]9q'dlor treq . > ?o48 Hz.
DIOIIAL I/O PORTS
2 ports: Porl Cl is sollware seloclable a8 a binary
inpitt or control oulpuf. Port C?JHI b inpul only and
can be software configurod as en SDI-12 pon, a Una-
ry input, ot a8 a switch closute counter (40 Hz max).
OUTPUT VOLTAGES (no load): high 5.0 v +0.1 v;
low < 0.1 V.
OUTPUT RESISTANCE: 5OO OhNS.
INPUT STATE: high 3.0 V lo 5.5 V; ldt, {.5 V to 0.8 V.
INPUT RESISTANCE: 100 kohm8.
SDI.I 2 INIERFACE STANDARD
This communlcatlon protocol, d€\relop€d tor micro-
paoc€$or-based hydrologb and environmental 9€n-
sors, i8 s*endad In the CR50O;
SENSOR CONNECTIONS: Digital UO Port Cl or C2
(tor asyncfi ronous cornnxJnication), 12V pow€r,
and ground. Up to ton SDI-I 2 senao|B can be
conn€cted to each CR5O0 digital port.
EMlond ESD PROTECilON
Emigsions: Me€t6 of e)(coede lhe lollowing slan-
dafth.
Radiated; per EN 55022:1987 class B
Conducted: p€r EN 55022:1 987 Ctass B
lmmunity: MeetB or e)(ceeds lh€ follorving standaKb.
ESD: p€r IEC 801-2;1984 8kV ah discharge
RF: per IEC 801-3:19&4 3V/m, 27'500 MHz
EFT: p€r IEC 801-4; 1988 lkv mains,SooV
olher
CPU AND INTERFACE
PROCESSOR: Hitacii 63ff|.
MEMORY: 128 K Flash and 32 K SRAM standard.
DISPI-AY: 8 diglt LCD (0.5' digrts).
PERIPHERAL INTERFACE:9 pin D.type connoclor
for k€yboard disday, storage module, mod€m,
print€r, card olorage modul€, and RS-232
adapter. Baud rales s€l€clable at 300, 1200,9600
and 76,800. ASCII communicalim Plotocol is on€
Btart bit, one stop bit, eight data bils (no padly).
CLOCK ACCURACY: il minutc pet monh.
SYSTEM POWER REQUIREMENIS
VOLTAGE: 9.6 to 16 volts.
TYPICAL CURRENT DBAIN: I mA quiescenl,
13 mA during processing, and 46 mA dudng
analog maasur€filent.
BATTERIES: Any 12 voll battery can bo connected as
a paimary power source. Se\rsral porcr suPply
options are availabl€ kom Campbell Sci€ntific.
PHYSICAL SPECIFICATIONS
SIZE: 8.4' x 1.5' x 3.9' - Additional dearance
required lor CSI serial UO and 8€nsor leads.
WEIGHT:15 oz.
WARRANTY
Thr€e yea6 against def€cts in mat€rials and
uodmanshiD.

SELECTED OPERATING DETAILS
Starting Date and Time
1. Date and time are stored with each output
afiay.
Data Transfer
2. Short Cut automatically programs the
CR500 to dump stored data to a CSI
SM192 or SM716 storage module. To
output data to a printer requires the
technical manual and a program change in
EDLOG.
Erase Final Storage Data
3. ln the third window of the *A Mode, enter
any number and A (see Sec. 7.5.1).
Complete CR500 Reset, lnctuding the Real
Time Clock
4. ln the fifth window in the *A Mode, enter
98765 and A.
Stop Logging Data
5. Key: *499A0A
This changes the scan rate to 0 and stops
execution of the datalogger program. The
program, any stored data, and the clock
setting remains.
To Start Logging Again
6. Key: *4 99 A [new scan rate in seconds] A

CAUTIONARY NOTES
1. To prevent corrosion in the CR500,
desiccant must be placed inside the
enclosure. To reduce vapor transfer into the
enclosure, plug the cable entry seals. DO
NOT totally seal enclosures equipped with
lead acid batteries. Hydrogen concentration
may build up to explosive levels.
Damage will occur to the analog input
circuitry if voltages in excess of +16 V are
applied for a sustained period. Voltages in
excess of 15 V will cause errors and
possible overranging on other analog input
channels.
When using the CR500 with the PS12LA,
remember that the sealed lead acid
batteries can be permanently damaged if
deep discharged routinely or left in a
discharged state for a long period of time.
The cells are rated at a 7 Ahr capacity but
experience a slow discharge even in
storage. lt is advisable to maintain a
continuous charge on the PS12LA battery
pack, whether in operation or storage.
To make it easier to connect power to the
CR500 remove the green connector on the
terminalstrip. Connect 12 V and G in the
proper positions and plug the connector
back into its receptacle.
When connecting power to the CR500 with
the green connector in place,lirst connect
the positive lead from the power source to
the 12 V terminal. Then connect the
negative lead to G. Connecting these leads
in the reverse order makes it easier for the
positive wire to accidentally touch a
grounded component and short out the
power supply.
Voltages in excess of 5.5 volts applied to a
control poft can cause the CR500 to
malfunction. Voltages in excess of 8 VDC
can cause damage.
Voltages in excess of 7 VDC applied to the
5 V port will damage the CR500.
Voltage pulses can be counted by CR500
Pulse Counters configured for High
Frequency Pulses. However, when the
pulse is actually a low frequency signal
(below about 10 Hz)AND the positive
voltage excursion exceeds 5.6 VDC, the 5
VDC supply will start to rise, upsetting all
analog measurements.
Pulses whose positive voltage portion
exceed 5.6 VDC with a duration longer than
100 milliseconds need external
conditioning. See below.
FIGURE. Conditioning for Long Duration
Voltage Pulses
7.
4.
ilt

cR500
1. lntroduction
1.1 Configuration
Required ltems for a o CRSoo
Complete System o pC50O - CRsoo Support Software (includes Short Cut, a "point
and clicK program builder)
. Operato/s Manual
c '12 VDC power supply
CSI options: BPALK or PS12LA
. sealed enclosure
CSI options: ENC 10/12 or CSI part number (P.N.) 6447 with 3
cable entry seals and a sealable vent to atmosphere. Other
options include ENC 1214 and ENC 16/18.
. Interface for user access. Either the CR1OKD or PO/laptop with
the SC32A optically isolated RS232 inter{ace and a 9 to 25 pin
cable (P.N. 7026). When using a battery-powered laptop
computer the SC929 cable can be used in place of the SC32A
and P.N.7026.
Option o PC208 or PC208W Support Software
Supports telecommunications to retrieve data, monitor
measurements, set the clock, etc.

cRs00
2. Hardware
2.1 CR500
Analog Inputs and
Excitation
Earth Ground
Each CR500 should
be tied to a good
earth ground.
Pulse Counters,
Digitallnputs
and Control
Output
(See Sec.2.3)
Analog Inputs
and Excitation
(See Sec.2.2)
Cable Tie
Downs
2.2
Campbell
Mounting Flanges
(See Mounting Options,
Analog Inputs: Terminals SE 1, 2 , 3, and 4 (labeled in light bl
are single-ended input channels. ln a single-ended measu
the voltage on an analog input is measured with respect to
ground (AG).
When wired and programmed for a differential measurement,
2 are DIFF 1H and 1L. lnputs SE 3 and 4 are DIFF 2H and 2L
in white). ln a differential measurement, the voltage on the H
input is measured with respect to the voltage on the L (low) i
rH Ll
DIFF L 1J
sE12
*;..,,,. Analog ground:
*i.# excitationreturn.
tri........-
Sec.6.2)
Reference for single-ended measurements
Circuit
polarity
(See 2.s)
9 Pin
(See

2.3 Pulse Gounters,
Digital Inputs, and
Gontrol Output
cR50(r ''
Excitation channels: Provide a precision, programmable switched
voltage for sensors that require excitation. Range: t 0 - 2.5 VDC.
Power ground: Connect cable shields to this ground to minimize
electrical noise and protect against voltage transients. The main
grounding lug; labeted "earth ground", must be tied to earth ground.
Also used as excitation return for some sensors.
Pulse Counters: To measure switch closures and voltage pulse
type sensors. P1 and P2 are programmable for switch closure,
voltage pulse, or low level,AO signals (see spec sheet on page i).
CAPT can be programmed to count switch closures at a rate up to
40Hz (see below).
Power Ground: Use as ground reference for pulse counters, binary
inputs, SDI-12 inputs, 12 VDC or 5 VDC outputs. Ground terminal for
cable shields to minimize electrical noise on sensor inputs and
protect against voltage transients. The main grounding lug, labeled
"earth ground", must be tied to the earth ground.
Digital UO Ports:
Port Cl: When configured as input can be programmed as an
SDI-I2 communication line orto read the status of a line.
When configured as output can be set high (5 VDC) or low
(0 VDC) according to time or a condition. Typically this port can
be used to activate an external device (e.9., a sampler) through a
relay.
Port C2lP3: Dualfunction controlled by CR500 program.
- C2:- Input only.-SDl-1'2'communieation line or monitoring
the status of a line.
P3: Port can be programmed to count switch closures up to
4AHz. Example: tipping bucket rain gauge.
ffiffiffiffiffi
P2
ffiffiffi
G
ffiffiffiffiffiffiffiffi1
c1 c2
P3

cR500
, .'r*. fil;1t,ii..'*l;;"#
: ::l:l:jj l::, '.i t,l:j:f;fi;,r;,''.:'.,,,j,j;,.,,,,,,r1:: : ::::
,ml+r**,ffiim*iii#l#,
,,,,;''",:i +:r.L.r..;;,,ii ;i;l::.t'',:, ;:,.t;,:.,:.;
2.4 Communicating with
the CR500
CRlOKD
PC or Laptop
5 VDC: Provides power for external devices. Example:
to a tipping bucket rain gauge being read by port P3.
12 VDC: Providbs 12 V for SDI-12 communication or for
An externaldevice must be connected to the CR500's CS l/O
communicate with the CR500. This may be either Campbell
Scientific's CR1OKD K€yboard Display, a computer/terminal, or
of several Campbell Scientific modemsfinterfaces.
The CR1OKD is used to verify field operation, display incoming
measurements (*6 mode), view or set the clock (.5 mode), vi
set *4 values, display final storage values (.7 mode) and view
and diagnostics in the *A and *B modes (Sec. 5).
done in Short Cut (Sec. a.3). The program is then downloaded
CR500 through a PC to CR500 link as shown below.
The CR1OKD is powered by the CR500 and connects directly
9-pin serial l/O port via the SC12 cable (supplied with the CR1
No interfacing software is required.
Computer to CR500 communication is accomplished using
Campbell Scientific's PC500 or PC208(W) support software
packages. PC500 requires a direct link (SC32A or SC929),
PC2OB and PCZOBW accommodate all CSI telecommunication
interfaces (phone, radio; cellular, etc.). Connect the RS232
the PC's serial port (usually a male 9 pin connector).
Cable

cR500
2.S CRS00 power The CR500 operates at 12 VDC (nominal). Below 9.6 or above
Requirement 1:.Y,o,:,the cR500 will not operate properly. see section 6.5 for
oetails.
3. Internal Memory lllff,Etl1tfiisof has 32Kof sRAM and 128Kof non-voratire
32K SRAMI Used for running datalogger programs.
12gK Flash Memorv The Flash memory stores the operating system, user programs, and
- final storage data.
Breakdown of Flash memory:
o 48K for operating system and datalogger program instruction set.
o 16K for storage of both active and standby user programs.
Several programs can be stored and later recalled using the *D
mode. See Section 7.5.4.
o 64K for final storage data. Four 16K sectors. Data are written to
memory one reading at a time. When memory is full, the 16K
sector with the oldest data is completely erased. Then new data
is stored in that sector.
Maximum Data When allthree sectors are full, the CR500 will have over 32,000
Storage readings'
When the next reading must be stored, the oldest 16K sector is
erased and then the reading is stored. At that point, the CR500 will
have just over 24,000 readings in final storage.
For more information on the CR500 memory, see Section 7.2.

4.
cR500
Software and
Programming
+.1 PC500 Support
Software
Install PC500 and
Short Cut
Start PC500
4.2 Building a Program
Mouse' driven, [email protected] ram that supports basic CRSOO-Io-PC
operations including program generation, monitoring of real-ti
measurements, data retrieval over a direct link, and simple
table generation. For operation without a mouse, use the ALT
activate the menu bar. Telecommunications requires PC208 or
PC208W..
You have two dlskettes: PC500 and Short Cut. Place the
diskette in the A: drive slot and change to the A: drive. At the
prompt type "install" and press <Ente>. The installation
take you through the process including asking for the Short Cut
diskette when needed. lt will also create a PC500 directory.
Type "PC500" at the DOS prompt and press <Ente>. After the
program loads you will see the main PC500 screen and menu.
OK to remove the note.)
Using Short Cut, you can select sensors and measurements,
output data, create wiring diagrams, and prepare reports.
refer to sensor manuals for installation and maintenance

Starting Short Gut
Creating the CR500
Program
Step 1
cR500
ln the PC500 menu, choose File. ln the File menu, Short Cut. We
will abbreviate these directions from here on, e.9., FilelShort Cut.
Short Cut leads you through four easy steps.
Open a new or existing program by selecting one of the options. For
a new program, use a name that can be used for the station/logger
as well. The site name often works well. Short Cut will use this
name for the program it creates. Select OK to go on.
Two files are needed for each site. One will be the CR500 program
created by Short Cut. The other, the station file (Sec. 4.3) contains
the information PC500 requires to communicate with an individual
CR500 at a specific site. Use the same name (ideally the site name)
for both the program and the station file.

cR500
Step 2
Select the CR500 as the datalogger type, and click OK to go on.
In the main screen click on <Go to Window> in Step 2 to see
screen:
1111:1:1::::ljij:::i:l:!i llllilllilill: llliii: lllillil:1:111: lj:i:: Illilinrljii$iiii:
Select the scan rate and click OK. Next, the sensor type:
Meteorological, Level/Stage, Water Quality or Custom.
Then highlight a sensor and click add to select.

cRs00
In this example, the 1078 has been selected from the group of water
quality sensors. A sensor information screen appears.
For most sensors you must furnish some configuration information.
Short Cut will prompt you for the required information. ln this case, the
user has selected an output in degrees Celsius. -
After this selection the 107B can be added to the list of
sensors/measurements for this program. Click Add. lf you wish to
measure other sensors, repeat the process

cR500
Step 3
Step 4
10
wish to view. All of this information can be printed by selecting
After selecting all of your sensors, click Close. Then on the
screen select <Go to Window> in Step 3 to see the following
Select Intervals and Output Data. Select the processing and
output for your application.
You may specify up to three output reports and output intervals.
select the output report you want to work with among the three
cascaded windows. The hot keys are Alt-1, Alt-2, and Alt-3.
the output interval, if desired. Next, select a
the list on the left followed by the type of processing desired (
sample, average, etc.)from the buttons in the middle of the
The output labels willappear in the report window as they are
The data output for each interval starts with an arcay (report) lD
number and a time stamp. lf you do not add measurements to
report, the report will be disabled.
In this example a 15 minute average of the water temperatures
measured every 60 seconds has been selected. Click Close
done.
Select <Go to Window> in Step 4.
Save the program and view or print wiring diagrams, data labels
monitoring, the *4 table (see Sec. 6.9), and list output data.
Use the check boxes on the right screen to select the i
NOTE: lt is prudent to output battery voltage and program
signature once a day (see Output Table 3).