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Campbell RF400 Instruction Manual

Spread spectrum data radio/modem
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RF400/RF410/RF415 Spread
Spectrum Data Radio/Modem
Revision: 3/05
C o p y r i g h t
( c )
2 0 0 1 - 2 0 0 5
C a m p b e l l
S c i e n t i f i c ,
I n c .

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  • Page 1 RF400/RF410/RF415 Spread Spectrum Data Radio/Modem Revision: 3/05 C o p y r i g h t ( c ) 2 0 0 1 - 2 0 0 5 C a m p b e l l S c i e n t i f i c ,...
  • Page 2 Warranty and Assistance The RF400 SERIES SPREAD SPECTRUM DATA RADIO/MODEMS are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty.
  • Page 3 Where an AC adapter is used, CSI recommends Item # 15966. This AC adapter is included as part of Item # 14220 RF400 Series Base Station Cable/Power Kit. Any other AC adapter used must have a DC output not exceeding 16.5 Volts measured without a load to avoid...
  • Page 4 This is a blank page.

  • Page 5: Table Of Contents

    4.5.3 Antenna Surge Protector Kit ............20 5. Software Setup............21 5.1 Point-to-Point..................21 5.2 Point-to-Multipoint .................21 5.3 Example Setups..................21 5.3.1 Direct PC to RF400 Series Base Station Setup ......21 5.3.2 Remote Station Setup ..............23 5.3.3 LoggerNet Configuration ..............25 5.3.4 PC208W Configuration..............26 6. Troubleshooting............28 Appendices A.
  • Page 6 C. RF400 Series Address and Address Mask ... C-1 D. Advanced Setup Standby Modes ......D-1 E. RF400 Series Port Pin Descriptions ..... E-1 F. Datalogger RS-232 Port to RF400 Series Radio ... F-1 G. Short-Haul Modems ..........G-1 H. Distance vs. Antenna Gain, Terrain, and Other Factors .............
  • Page 7 RF400 Table of Contents K-1. 900 MHz Gain Antenna Test Distances..........K-6 L-1. Advanced Setup Menu ................ L-1...
  • Page 8 RF400 Table of Contents This is a blank page.

  • Page 9: Introduction

    (see Appendix H for a discussion of antenna gain and other factors affecting distance). The RF410 differs from the RF400 in that it operates at 922 MHz for regions such as Australia, New Zealand, and Israel. The RF410’s communication range is the same as that of the RF400.

  • Page 10: Rf400 Series Specifications

    RF400 Series Spread Spectrum Data Radio/Modems FIGURE 1. RF400 The RF400 has a 9-pin serial CS I/O port and a 9-pin serial DCE RS-232 port. The CS I/O port allows the RF400 to connect to a datalogger. The RS-232 port allows direct PC connection for Setup Menu access and to create a direct connect RF400 “base station”...

  • Page 11: Quick Start

    RF400 Series Spread Spectrum Data Radio/Modems Quiescent Current in Standby Modes* Avg. Quiescent Advanced Setup Standard Current (mA) Standby Mode Setup RF400/ RF410 RF415 24.0 33.0 0 (no duty cycling) 0.64 0.84 0.40 0.50 * Not receiving a signal nor transmitting PHYSICAL •...
  • Page 12 Two RF400s Two RF400 antennas AC adapter (Item # 15966 or part of kit #14220) Serial cable (6 ft.) for PC COM port to RF400 RS-232 port (Item # 10873 or part of Item # 14220) SC12 cable (included with RF400) Datalogger (CR10X, CR510, or CR23X) Field Power Cable (Item # 14291) if datalogger or wiring panel doesn’t...

  • Page 13: Rf400 Basic Point-To-Point Network

    PS512M Power Supply < 1712 When you connect power to the RF400 (through the SC12 cable or the optional Field Power Cable) you should see the power-up sequence of red and green LEDs described in Step 1 (assuming datalogger is powered).

  • Page 14: Point-To-Point Loggernet Network Map

    Step 3 – LoggerNet/PC208W Set-up The next step is to run LoggerNet/PC208W and configure it to connect to the datalogger via the RF400 point-to-point network you have set up. The RF400 in a point-to-point network can operate transparent to LoggerNet/PC208W. Simply add a datalogger to a COM port in the Device Map.

  • Page 15: System Components

    RF400 settings. When you connect an RF400 to a datalogger (CS I/O port to CS I/O port) the RF400 detects the presence of the datalogger and makes its CS I/O port the active port. When you are not connected to a datalogger’s CS I/O port, Auto Sense detects that and...

  • Page 16: Setup Menu

    100 mS < 4 mA ½ sec 600 mS < 2 mA 1 sec 1100 mS < .4 mA 8 sec 8100 mS *Maximum time it takes to get an RF Packet sent and for the other RF400 to respond.

  • Page 17: Networking

    16-bit address. If they match, and there are no packet errors, the receiving RF400 sends the packet data to the configured active port (CS I/O or RS-232). This assumes a receiving RF400 address mask of ffffh. If other than ffffh (1111,1111,1111,1111 binary), only those address bits that correspond to address mask “1”...

  • Page 18: Error Handling And Retries

    CRC. The RF400 rejects a received packet (doesn’t send it out a port) if the packet’s header address fails to match the RF400 address, if an RF module receive error is detected, or if the RF packet’s CRC test fails.
  • Page 19 4.1.4.4 Number of Bytes Transmitted before Delay This feature prevents an RF400 Series radio which has lots of data to transfer from tying up a network until it is finished. The range of settings is 1 to 65535.

  • Page 20: Received Signal Strength

    CRC. If 0 retries are configured, the receiving RF400 will simply throw away any packet that fails the CRC. This reading is cleared upon exiting Setup Menu or cycling RF400 12 V power.
  • Page 21 If 120 VAC is available at the site, the 120 VAC adapter alone (CSI Item # 15966) is an option. A 12 V supply may connect to either the RF400’s “DC Pwr” jack or CS I/O pin 8 (or both, since there is diode isolation between supply inputs). The 12 V supply inputs are diode protected against the application of reverse polarity power.

  • Page 22: Serial Cables

    4.3 Serial Cables In an RF400 base station, a straight-through DB9M/DB9F RS-232 cable will connect from the RF400’s RS-232 port to the PC COM port. This cable is part of the optional Base Cable/Power Kit (CSI Item # 14220). A remote RF400 normally uses the included SC12 cable to connect the...

  • Page 23: Antennas For The Rf400 Series

    RF400 Series Spread Spectrum Data Radio/Modems A remote RF400 can be connected to a CR23X’s or CR5000’s RS-232 port with a null modem DB9M/DB9M cable (CSI Item # 14392). See Appendix F for details on power supply. 4.4 Antennas for the RF400 Series Several antennas are offered to satisfy the needs for various base station and remote station requirements.
  • Page 24 CAUTION requirements, the RF400 series may be used only with approved antennas that have been tested with this radio and a minimum separation distance of 20 cm must be maintained from the antenna to any nearby persons.
  • Page 25 RF400 Series Spread Spectrum Data Radio/Modems ITEM # 14204 900 MHZ OMNI ½ WAVE WHIP 0 dBd ITEM # 14201 900 MHZ YAGI 9 dBd w/MOUNTS ITEM #14205 900 MHz YAGI 6 dBd w/MOUNTS ITEM # 14221 900 MHZ OMNI COLLINEAR 3 dBd w/MOUNTS...
  • Page 26 RF400 Series Spread Spectrum Data Radio/Modems ITEM #15970 900 MHZ Indoor OMNI 1 dBd Window/Wall Mounted ITEM #16005 2.4 GHz OMNI HALF WAVE WHIP 0 dBd ITEM #16755 2.4 GHz ENCLOSED YAGI, 13 dBd w/MOUNTS FIGURE 4. Some FCC Approved Antennas...

  • Page 27: Antenna Cables And Surge Protection

    Protection Kit. The COAX NTN-L cable is a low-loss RG8 coaxial cable that requires the 14462 surge protector in order to connect to an RF400 series radio. The RG8 / Antenna Surge Protector are recommended in preference to the COAX RPSMA in the following applications: •...

  • Page 28: Antenna Surge Protector Kit

    When use of COAX RPSMA would result in too much signal loss (see page H-3) • When the RF400 series radio will be used in an environment susceptible to lightning or electro-static buildup 4.5.3 Antenna Surge Protector Kit The Surge Protector Kit for the RF400 series radios includes the following: •...

  • Page 29: Software Setup

    1, and the second remote’s radio address might be 2, etc. For the base RF400 to be able to transmit to a remote RF400, the base’s Radio Address must be temporarily changed to match that of the remote. The address...
  • Page 30 Enter Choice: Leave Active Interface in “Auto Sense” (default setting) for most applications. In Auto Sense the RF400 will test for 5 V on CS I/O port (pin 1) to determine if a datalogger is present and if so select the CS I/O port.

  • Page 31: Remote Station Setup

    Select a Radio Address (0 – 1023). The radio addresses must be the same in point-to-point communications (for point-to-multipoint communications you could set the base RF400 to 0 and the remotes to 1, 2, 3, etc.). It is a good idea to label each RF400 indicating the configured network address, radio address, hopping sequence, etc.
  • Page 32 (see Troubleshooting Section 6, item 6). Site considerations Location of an RF400 near commercial transmitters, such as at certain mountaintop sites, is not recommended due to possible “de-sensing” problems for the RF400 receiver. A powerful signal of almost any...

  • Page 33: Loggernet Configuration

    (4) Extra Response Times are typically 0 s In the case of point-to-multipoint, the RF400s are always represented in the LoggerNet Setup map so that LoggerNet can temporarily change the base RF400’s Radio Address to communicate with one out of a group of remote RF400s. (1) Point-to-multipoint...

  • Page 34: Pc208W Configuration

    RF400 Series Spread Spectrum Data Radio/Modems 3 dBd Omni Collinear 9 dBd Yagi 6 dBd Yagi 0 dBd Half-wave CS I/O CS I/O CS I/O RF400 RF400 RF400 RS-232 RF400 DATALOGGER DATALOGGER DATALOGGER CS I/O CS I/O CS I/O AC Adapter FIGURE 8.

  • Page 35: Pc208W Datalogger Generic Dial String

    (i) D1000 creates a 1 second delay (ii) T sends quoted string w/o waiting for a character echo (iii) +++ is string sent to put RF400 in AT Command mode (use other character if phone modems in path) (iv) R”OK”9200 waits up to 9.2 sec for RF400 “OK” response (v) ATDT3001 changes radio address to talk to remote RF400 with network address of 12 and radio address of 1.

  • Page 36: Troubleshooting

    75 mA transmitter bursts lasting only a few milliseconds. Lightning damage to RF400 Swap in a known good RF400 with the same settings and see if this cures the problem. Lightning damage can occur leaving no visible indications.
  • Page 37 RF400 can overwhelm (de-sense) the RF400 receiver resulting in failed packets and LoggerNet/PC208W retries. This problem could also occur if you located an RF400 at a site containing commercial transmitters or repeaters. In general it is best to avoid such sites, especially the high-power FM or AM transmitter antenna sites which can change at any time with added equipment.
  • Page 38 11. RF400 has wrong Network Address, Radio Address, Hopping Sequence, or Standby Mode It is improbable that an RF400 that has been working would ever change address, hopping sequence or other settings. However, check the settings for the unlikely event this may have happened. Try “Restore Defaults”...

  • Page 39: Part 15 Fcc Compliance Warning

    Appendix A. Part 15 FCC Compliance Warning Changes or modifications to the RF400 series radio systems not expressly approved by Campbell Scientific, Inc. could void the user’s authority to operate this product. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
  • Page 40 This is a blank page.

  • Page 41: Setup Menu

    Appendix B. Setup Menu Here is the structure of the RF400 series’ built-in Setup Menu system which can be accessed by configuring a terminal emulator program such as Procomm HyperTerminal to 9600 baud (8-N-1) and pressing the “Program” button on the RF400 with RF400’s RS-232 port cabled to appropriate COM port of PC.
  • Page 42 Appendix B. Setup Menu ii) Radio Standby Modes (1) Standby Mode (0 => 24 mA Always ON 3 => 4 mA 1/2 sec Cycle) (4 => 2 mA 1 sec Cycle 5 => 1 mA 2 sec Cycle) (6 => .6 mA 4 sec Cycle 7 =>.4 mA 8 sec Cycle) (2) Time of Inactivity to Sleep (units of 100 msec;...
  • Page 43 Appendix B. Setup Menu 4 => 38.3k (2) RS-232 Parity: 0 => None 1 => Odd 2 => Even (3) RS-232 Character Length: 0 => 8 bits 1 => 7 bits (4) RS-232 Stop Bits: 0 => 1 1 => 2 Restore Defaults Show All Current and Default Settings Save All Parameters and Exit Setup...
  • Page 44 Appendix B. Setup Menu This is a blank page.

  • Page 45: C. Rf400 Series Address And Address Mask

    Address mask The RF400 has a user programmable 16-bit address mask. Like the address, the address mask is divided into two parts. The six most significant bits are the Network Address Mask and the remaining ten bits are the Radio Address Mask.
  • Page 46 Appendix C. RF400 Series Address and Address Mask four bits are not compared, any remote RF400 with Radio Address of 0 to 1111 (decimal 0 to 15) will be received by the base station. This allows multiple remotes in a network to be received by the base without changing the base Radio Address (the remotes cannot receive the base, however).
  • Page 47 Appendix C. RF400 Series Address and Address Mask NET ADDRESS RADIO ADDRESS COMBINED 16-BIT ADDRESS (decimal) (decimal) (hexadecimal) 001D 001E 001F 0020 1022 03FE 1023 03FF 0400 0401 0800 0801 0C00 0C01 1000 1001 1400 1401 1800 1801 1C00 1C01...
  • Page 48 Appendix C. RF400 Series Address and Address Mask NET ADDRESS RADIO ADDRESS COMBINED 16-BIT ADDRESS (decimal) (decimal) (hexadecimal) 3C00 3C01 4000 4001...

  • Page 49: D. Advanced Setup Standby Modes

    Appendix D. Advanced Setup Standby Modes The Standard Setup menu selections should fill the majority of user needs. The following information is given in case you need to program a non-standard standby mode. The Standard Setup menu selections do not correspond with Advanced Setup menu entries.
  • Page 50 Appendix D. Advanced Setup Standby Modes In general, these inactivity timers should be set so that the RF400 stays on (receiving or transmitting, not in standby mode) longer than the quiet times during communication. You can experiment with this to see how it works.

  • Page 51: E. Rf400 Series Port Pin Descriptions

    RS-232 data for up to 8 seconds while waiting for the other RF400 to wake up before transmitting it. Also, if the RF400 is doing a lot of retries, that can take extra time and require flow control to avoid buffer over-run.
  • Page 52 Used by datalogger with SDE and TX lines to transfer data to synchronous devices 12V supplied by Sources 12 VDC to power datalogger peripherals Serial data transmit line I = Signal Into the RF400, 0 = Signal Out of the RF400...

  • Page 53: F. Datalogger Rs-232 Port To Rf400 Series Radio

    A 12-Volt Field Power Cable (Item # 14291) or AC adapter (Item # 15966) must be installed to furnish 12 V to the “DC Pwr” connector on the RF400. The RF400 can operate with Active Interface in either the Auto Sense mode (default) or in the RS-232 mode with this configuration.
  • Page 54 This is a blank page.

  • Page 55: G. Short-Haul Modems

    (see Section 5.3.1, 4.d). 12 V power for the base RF400 can be supplied by an AC adapter as shown or a Field Power Cable (see Power Supplies in Section 4.4). Current dataloggers...
  • Page 56 RS-232 port always active. This results in an additional constant 2 mA current drain by the RF400. If you don’t do this, the base RF400’s RS-232 port will turn off 30 seconds after activity and the attached SRM-5A which gets its power from the port will not receive any messages from the PC.

  • Page 57: H. Distance Vs. Antenna Gain, Terrain, And Other Factors

    ANTENNA HEIGHT In situations where the RF400 antennas are situated virtually line-of-sight, the elevation of antennas (by choice of site or by installing a tower or mast) can substantially increase signal strengths. The amount of increase depends on factors in the propagation path between the radios including terrain, foliage, and man-made structures.
  • Page 58 There is a great deal of interest in estimating the distance you can expect to achieve with the RF400 radios. Also of interest are the effects of cable length, antenna gain, and terrain. Some of these items are easy to quantify (cable loss, for instance);...
  • Page 59 1 milliWatt. The formula is: dBm = 10 log (Pt) with Pt expressed in milliWatts. Transmitter Power (Pt) (milliWatts) 50 (RF415) 100 (RF400 or RF410) 1000 5000 Cable Loss Cable loss is a function of cable type, length, and frequency and is usually specified as attenuation (dB) per 100’...

  • Page 60: Antenna Gain

    Antenna gain is specified either in dBi (decibels of gain relative to an isotropic radiator) or in dBd (decibels of gain relative to a dipole). The relationship is: dBi = dBd + 2.15 Some antennas that are FCC approved for use with the RF400 series are: Mfg. Antenna Type...
  • Page 61 Appendix H. Distance vs. Antenna Gain, Terrain, and Other Factors As mentioned before, free space conditions are the ideal, but seldom actually seen. The higher the antenna height relative to the terrain in the line of sight path, the closer to free space conditions. Antenna height is everything! Here are some additional propagation effects that increase the path losses: Diffraction This is caused by objects close to the line of sight path.

  • Page 62: H-1. 900 Mhz Distance Vs. Path Loss (Lp In Db) Per Three Path Types

    Some examples will help illustrate the tradeoffs in a link analysis. These examples will all use the RF400 900 MHz radio, and will use –107 dBm as the required power level at the radio receiver. This is 3 dB higher than the quoted sensitivity of –110 dBm, which will give us a 3 dB margin.
  • Page 63 Appendix H. Distance vs. Antenna Gain, Terrain, and Other Factors Use –107 dBm for Pr, solve for Lp: Lp = 135 dB Use the 3 to 4 power tables: Range from ~9 (4 power) to ~22 (3 power) miles Example #2 Base has MaxRad BMOY8905 Yagi, with 50’...
  • Page 64 Appendix H. Distance vs. Antenna Gain, Terrain, and Other Factors This is a blank page.

  • Page 65: I. Phone To Rf400 Series

    Appendix I. Phone to RF400 Series Where a phone to RF400 Base is desired, the following configurations will provide Point-to-Point or Point-to-Multipoint communications. To have a base datalogger in this configuration requires that another RF400 be added at the base.
  • Page 66 3) All other settings: defaults Remote RF400 – leave all settings: defaults Note: If there is a neighboring RF400 network, you should change the Hopping Sequence of base and remote RF400s to a new setting to avoid interference (see Section 5.3.1 for method to detect neighboring network).
  • Page 67 “0001” in the first ATDT command is the hexadecimal representation of the combined Network Address / Radio Address chosen for this example (i.e., Network Address = 0, Radio address = 1). The RF400 Setup Menu calculates and displays this number for you in Standard Setup as “0001h”.

  • Page 68: I-1. Loggernet Point-To-Multipoint Setup

    The PS512M null-modem connectors (it’s not important which connector goes to which unit) connect via SC12 cables to the COM210 and the base RF400 CS I/O port. Connect the site phone line to COM210. Connect power to PS512M. Connect antenna to RF400.

  • Page 69: J. Monitor Csat3 Via Rf400 Series

    Appendix J. Monitor CSAT3 via RF400 Series Procedure for installing a pair of RF400 series spread spectrum radios for monitoring a CSAT3 system at a distance. This function has traditionally been implemented by running a short haul modem cable between CSAT3 and PC.
  • Page 70 (f) Retry Level – if RF noise is a problem, try “Low” or a higher level to see if response improves. (6) Repeat steps 1 - 5 with “remote” RF400. Temporarily use 6 ft. cable and AC adapter during the remote RF400 setup. CSAT3 monitoring requires a Point-to-Point network so you should configure all remote RF400 settings the same as you did for the base RF400.
  • Page 71 Appendix J. Monitor CSAT3 via RF400 Series (2) Remote station (a) Connect 12 V power supply to RF400 (can be either 120V AC adapter or 12V Field Power Cable) (b) Connect 9 pin male to 9 pin male null-modem cable from CSAT3 RS-232 connector to RF400’s RS-232 connector.
  • Page 72 Appendix J. Monitor CSAT3 via RF400 Series This is a blank page.
  • Page 73 (recommend AC adapter Item # 15966 and any 12 V battery pack with Field Power Cable Item # 14291) The following descriptions tell how to build an RF400/RF410 loop-back test system. Recommendations are given as to where to place the system to avoid rf-reflections (see TESTING ¼...
  • Page 74 Appendix K. RF400/RF410 Pass/Fail Tests (d) Emulation: TTY (e) ASCII (f) COM1 (or any available COM port) NOTE With some versions of HyperTerminal after changing a setting it is necessary to do a “Call Disconnect” (or “Disconnect”) followed by a “Call Connect” (or “Call”) for the new setting to register.

  • Page 75: K-1. Loop-Back Test Without Antennas

    After verifying the functionality of the terminal program and the integrity of the serial cable and COM port, proceed as follows: (1) Connect 12V power to an RF400/RF410. This can be from an AC adapter (Item # 14220 or Field Power Cable (Item # 14291) with 12V battery pack attached (see step 12 below).
  • Page 76 RF400/RF410. RF400/RF410’s RS-232 Connector (female) (12) Connect 12V power to Remote RF400/RF410. This can be supplied by an AC adapter (Item # 14220) or Field Power Cable (Item # 14291) connected to a 12V battery (battery can be an 8 cell pack of alkaline A, C, or D cells, or a lead-acid battery).

  • Page 77: K-2. Vertically Polarized 9 Dbd 900 Mhz Yagi

    (h) With bad or missing ¼ wave OMNI antenna you should get few to no characters echoed back. Be careful to not exceed maximum supply voltage of 18 VDC to RF400/RF410. Use “quiet” power supply without noise or hum (a 12V lead-acid battery is fine, if no trickle charger is attached during the tests).

  • Page 78: K-3. 3 Dbd 900 Mhz Collinear Omni Antenna

    Appendix K. RF400/RF410 Pass/Fail Tests FIGURE K-3. 3 dBd 900 MHz Collinear Omni Antenna (d) Set up remote RF400/RF410 with NO antenna and with antenna connector 20 inches above floor. (e) Arrange antenna distance apart according to following table. TABLE K-1. 900 MHz Gain Antenna Test Distances...
  • Page 79 Standard Setup menu selection 4 CALCULATIONS BASE The average current drain of a base RF400/RF410 configured for scheduled collections has 5 contributors: 1) The STANDBY AVG RECEIVE CURRENT – Is 2) The average transmit current of LONG HEADER – Ih 3) The average transmit current of data request transmissions –...
  • Page 80 Appendix L. RF400/RF410 Average Current Drain Calculations The base RF400/RF410’s total average current (It) can be calculated over an interval (T) as follows: It = Is + Ih + Iq + Ir + Ii Is = {table value} (ms) ×...
  • Page 81 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #1 (Remote RF400/RF410 in default standby mode) There is a Point-to-Point system with base RF400/RF410 and remote RF400/RF410. The remote station senses weather conditions and sends low- resolution data to final storage. The base station collects 10 data points from the remote station once per minute.
  • Page 82 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #2 (Base RF400/RF410 in default standby mode) The base RF400/RF410 in the above example does more receiving and less transmitting than the remote RF400/RF410 so you might expect less average current drain, however, the amount of data being transmitted per minute is small, and the long header required is significant.
  • Page 83 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #3 (Base RF400/RF410 in “<0.4 mA, 8 sec Delay” standby mode) The RF400/RF410s in this example are configured for the lowest possible average standby mode current (Advanced Setup Menu selection 7). The same amount and frequency of data are collected as in Example 1.
  • Page 84 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #4 (Remote RF400/RF410 in “<0.4 mA, 8 sec Delay” standby mode) The RF400/RF410s in this example are configured for the lowest possible average standby mode current (Advanced Setup Menu selection 7). The same amount and frequency of data are collected as in Example 1.
  • Page 85 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #5 (Base RF400/RF410 in default “<4 mA, 1 sec Delay” standby mode) The RF400/RF410s in this example are configured for the default average standby mode current. The same amount of data (10 data points) are collected as in Example 1, however the frequency of collection is changed from once a minute to once an hour.
  • Page 86 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #6 (Base RF400/RF410 in “<0.4 mA, 8 sec Delay” standby mode) The RF400/RF410s in this example are configured for the lowest possible average standby mode current (Advanced Setup Menu selection 7). The same amount of data are collected as in Example 1, however the frequency of collection is changed from once a minute to once an hour.
  • Page 87 Appendix L. RF400/RF410 Average Current Drain Calculations EXAMPLE #7 (Remote RF400/RF410 in “<0.4 mA, 4 sec Cycle” standby mode ) The RF400/RF410s in this example are configured for the lowest possible average standby mode current (Advanced Setup Menu selection 7). The same amount of data are collected as in Example 1, however the frequency of collection is extended to once an hour.
  • Page 88 Appendix L. RF400/RF410 Average Current Drain Calculations This is a blank page. L-10...
  • Page 89 This is a blank page.
  • Page 90 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za sales@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

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