21X Micrologger
Page 2
...454-2505 FAX (4O3) 454-2655 Campbell Scientilic Ltd. 14-2o Field Street Shepshed... CAMPBELL SCIENTIFIC, lNC.'s option) defective products. CAMPBELL SCIENTIFIC, lNC. CAMPBELL SCIENTIFIC, lNC. FtMA#_ 815 West 1800 North l*ogan, Utah 84321 -1 784 CAMPBELL SCIENTIFIC,...) 753-2342 FAX (8O1) 7sO-954O Campbell Scientific Canada Corp. CAMPBELL SCIENTIFIC, lNC.'s obligation under normal use and seruice...CAMPBELL SCIENTIFIC's shipping address is warranted by a purchase order to any CAMPBELL SCIENTIFIC, lNC. does not accept collect calls. Products may nof be accompanied by CAMPBELL SCIENTIFIC...
...454-2505 FAX (4O3) 454-2655 Campbell Scientilic Ltd. 14-2o Field Street Shepshed... CAMPBELL SCIENTIFIC, lNC.'s option) defective products. CAMPBELL SCIENTIFIC, lNC. CAMPBELL SCIENTIFIC, lNC. FtMA#_ 815 West 1800 North l*ogan, Utah 84321 -1 784 CAMPBELL SCIENTIFIC,...) 753-2342 FAX (8O1) 7sO-954O Campbell Scientific Canada Corp. CAMPBELL SCIENTIFIC, lNC.'s obligation under normal use and seruice...CAMPBELL SCIENTIFIC's shipping address is warranted by a purchase order to any CAMPBELL SCIENTIFIC, lNC. does not accept collect calls. Products may nof be accompanied by CAMPBELL SCIENTIFIC...
21X Micrologger
Page 9
.... The 21XL ig powered with rechargeable lead acid cells add, in understanding and operating the 21X: 1. The lead acid batteries provide bacfiup in a single battery oper ted system. Campbell Scientific does not warrant bafleries. This Overuiew 2. The 21X Operator's Manual 3. have detailed descriptions of a power failure but are using (see OVS), and Section 14...
.... The 21XL ig powered with rechargeable lead acid cells add, in understanding and operating the 21X: 1. The lead acid batteries provide bacfiup in a single battery oper ted system. Campbell Scientific does not warrant bafleries. This Overuiew 2. The 21X Operator's Manual 3. have detailed descriptions of a power failure but are using (see OVS), and Section 14...
21X Micrologger
Page 32
...for datalogger assistance, please have not been previously compiled, they will block keyboard access to check or alter the programming. When calling Campbell Scientific for a PROM is a number which assures a 99.998% probability that if either enter a new password (1), or temporarily disable ...entry to 1) read the signature of the program memory and the software PROMs, 2) display the power-up is activated, then the 21X *1,*2, *3, *4, will be entered to secure the user's program information. When security is temporarily disabled, it will automatically re-enable ...
...for datalogger assistance, please have not been previously compiled, they will block keyboard access to check or alter the programming. When calling Campbell Scientific for a PROM is a number which assures a 99.998% probability that if either enter a new password (1), or temporarily disable ...entry to 1) read the signature of the program memory and the software PROMs, 2) display the power-up is activated, then the 21X *1,*2, *3, *4, will be entered to secure the user's program information. When security is temporarily disabled, it will automatically re-enable ...
21X Micrologger
Page 37
...altered. Positioning of the MPTR is then controlled by less than 512 data points when the datalogger program is set to Final Storage in Campbell Scientific's Final Storage Format (Appendix C.2). For example, assume the TPTR lags the DSP by commands from the keyboard (*7 Mode). The data is... 5.1). Untilthe ring memory wraps around and data overwrite occurs, the data may be transferred to a cassette tape recorder. The positioning of 21X Data Minimum Maximum Resolution Zero Magnitude Low 0.000 +0.001 0.0000 +.00001 2-2 This scenario is also true for the PPTR and data ...
...altered. Positioning of the MPTR is then controlled by less than 512 data points when the datalogger program is set to Final Storage in Campbell Scientific's Final Storage Format (Appendix C.2). For example, assume the TPTR lags the DSP by commands from the keyboard (*7 Mode). The data is... 5.1). Untilthe ring memory wraps around and data overwrite occurs, the data may be transferred to a cassette tape recorder. The positioning of 21X Data Minimum Maximum Resolution Zero Magnitude Low 0.000 +0.001 0.0000 +.00001 2-2 This scenario is also true for the PPTR and data ...
21X Micrologger
Page 38
... Low Resolution Format Value 07- 70 700 6.999 69.99 699.9 6999. While outprit data have the limits described above, the $omputations performed in the 21X are stored and processed in the seventh digit. INTERNAL DATA STORAGE The of the arithmetic. SECTION 2.
... Low Resolution Format Value 07- 70 700 6.999 69.99 699.9 6999. While outprit data have the limits described above, the $omputations performed in the 21X are stored and processed in the seventh digit. INTERNAL DATA STORAGE The of the arithmetic. SECTION 2.
21X Micrologger
Page 47
INSTRUCTION SET BASICS' 3.10 ERRORICODES There are fo 21X: Compil r , types of a programming error. Error 31 is the result of a hardware problem or...is the result of errors flagged by watchdog timer Data sent to unallocated Input Storage Attempt to Campbell Scientific. Error Codes Description Program table full lntermediate Storage full 21X reset by Run Time, Editor, and *D the Mode. Compile errbrs are errors in programming... updates, or if the counters are detected while the program is displayed. SECTION 3. The 21X keeps track of the number of allowable limits.
INSTRUCTION SET BASICS' 3.10 ERRORICODES There are fo 21X: Compil r , types of a programming error. Error 31 is the result of a hardware problem or...is the result of errors flagged by watchdog timer Data sent to unallocated Input Storage Attempt to Campbell Scientific. Error Codes Description Program table full lntermediate Storage full 21X reset by Run Time, Editor, and *D the Mode. Compile errbrs are errors in programming... updates, or if the counters are detected while the program is displayed. SECTION 3. The 21X keeps track of the number of allowable limits.
21X Micrologger
Page 51
...Printable ASCII 2X FinalStorage Format 30 SM192/716 Storage Module 31 Send filemark to sM192t16 The RC35 Cassette Recorder offered by Cainpbell Scientific is aborted by Campbell Scientific along with,a head alignment procedure prior to dump new data, the stan of Dump location (window 2) is changed while ... stop incrementing when the 4.3 CASSETTE TAPE OPTION The Model RC35 Cassette Tape Recorder or equivalent can be set to the 21X for use with the 21X (also compatible with the SC92A Cassette Write Only Interface or the SC93A Cassette ReadMrite Interface. number will be left attached ...
...Printable ASCII 2X FinalStorage Format 30 SM192/716 Storage Module 31 Send filemark to sM192t16 The RC35 Cassette Recorder offered by Cainpbell Scientific is aborted by Campbell Scientific along with,a head alignment procedure prior to dump new data, the stan of Dump location (window 2) is changed while ... stop incrementing when the 4.3 CASSETTE TAPE OPTION The Model RC35 Cassette Tape Recorder or equivalent can be set to the 21X for use with the 21X (also compatible with the SC92A Cassette Write Only Interface or the SC93A Cassette ReadMrite Interface. number will be left attached ...
21X Micrologger
Page 56
... Data Storage (DSP) and Telecommunications Modem Pointe (MPTR) referred to datalogger means "execute". 6. SECTION 5. TELECOMMUNICATIONS 5. Commands that return Campbell Scientific binary format data (F and K commands) return a signature (Appendix C). The best way to the 21X via the SC32A or other modem interface (Section 6.5). Datalogger returns Reference, the DSP location; CR to in the table...
... Data Storage (DSP) and Telecommunications Modem Pointe (MPTR) referred to datalogger means "execute". 6. SECTION 5. TELECOMMUNICATIONS 5. Commands that return Campbell Scientific binary format data (F and K commands) return a signature (Appendix C). The best way to the 21X via the SC32A or other modem interface (Section 6.5). Datalogger returns Reference, the DSP location; CR to in the table...
21X Micrologger
Page 62
...BITS 2345 START BIT l tLse) 7 Brr EIGHTH STOP Brr FIGURE 6.5.1. The 21X can communicate at the 21X ll0 port are transmitted one bit at a time, starting with respect to set with Campbell Scientific peripherals and modems. However, communication between some CampbellScientific modems (such as "no ...parity". ln the Telecommunications State, the 21X willset its baud rate to match the baud rate of the character...
...BITS 2345 START BIT l tLse) 7 Brr EIGHTH STOP Brr FIGURE 6.5.1. The 21X can communicate at the 21X ll0 port are transmitted one bit at a time, starting with respect to set with Campbell Scientific peripherals and modems. However, communication between some CampbellScientific modems (such as "no ...parity". ln the Telecommunications State, the 21X willset its baud rate to match the baud rate of the character...
21X Micrologger
Page 63
...supported by To data to the screen. lf the baud rate is correct, verity that the I AT IPS-2's and compatibles. Verify cables the 21X has power and that your computer or terminal is sending or receiving characters, there is a simple way to verify it is likely that the ...displayed once if it is not transmitted, or twice if it is set for Data bits, and no Parity. Set the duplex to echo that Campbell Scientific device, characters are using a computer, then a program or communieation software must match with half duplex.the character will be enabled for IBM PC IXT...
...supported by To data to the screen. lf the baud rate is correct, verity that the I AT IPS-2's and compatibles. Verify cables the 21X has power and that your computer or terminal is sending or receiving characters, there is a simple way to verify it is likely that the ...displayed once if it is not transmitted, or twice if it is set for Data bits, and no Parity. Set the duplex to echo that Campbell Scientific device, characters are using a computer, then a program or communieation software must match with half duplex.the character will be enabled for IBM PC IXT...
21X Micrologger
Page 65
... multiplier of 14 pH units, or O.O714V/pH. In the following example, an external reference junction is used to ground. A Campbell Scientific 107 Temperature Probe is used on the current drain remaining constant. In addition, if the temperature gradient between J-box and the thermocouple ...distance from the external battery is 18 AWG with a single-ended voltage measurement, it is often better to the 21X ground, any voltage difference between 21X and the measurement junction, thermocouple accuracy is 0.0187V or 0.26 pH units too high. SECTION 7. ended measurement ...
... multiplier of 14 pH units, or O.O714V/pH. In the following example, an external reference junction is used to ground. A Campbell Scientific 107 Temperature Probe is used on the current drain remaining constant. In addition, if the temperature gradient between J-box and the thermocouple ...distance from the external battery is 18 AWG with a single-ended voltage measurement, it is often better to the 21X ground, any voltage difference between 21X and the measurement junction, thermocouple accuracy is 0.0187V or 0.26 pH units too high. SECTION 7. ended measurement ...
21X Micrologger
Page 74
Using data supplied computed Delmhorst, Campbell Scientific has convert coefficients fpr a 5th order polynomialto 02.... converted to,Sypsum block resistance with Instruction 5$, Bridge 01: P5 01: 6 Block The Campbdll Scientific 227 Soil Moisture kohm uses a Delmhorst gypsum block with the CR21). the multiplier is range from ...bar limit of the probe requires a long Hl 1 LO1 Ht2 21X ERNEDDELDEArNDPSUTrOCHSAINNNGELLS E't_- 6 /.\ __4 _ Y2^ input settling time (see Section 13.3.1). temperature of 5 Campbell Scientific 101 Probes (used because the high source resistance of the wet ...
Using data supplied computed Delmhorst, Campbell Scientific has convert coefficients fpr a 5th order polynomialto 02.... converted to,Sypsum block resistance with Instruction 5$, Bridge 01: P5 01: 6 Block The Campbdll Scientific 227 Soil Moisture kohm uses a Delmhorst gypsum block with the CR21). the multiplier is range from ...bar limit of the probe requires a long Hl 1 LO1 Ht2 21X ERNEDDELDEArNDPSUTrOCHSAINNNGELLS E't_- 6 /.\ __4 _ Y2^ input settling time (see Section 13.3.1). temperature of 5 Campbell Scientific 101 Probes (used because the high source resistance of the wet ...
21X Micrologger
Page 95
... counts at the reset interval of the execution interval. lf the value is executed regardless of 1 sixteen bit counter and 2 eight bit counters. (Campbell Scientific has a hardware and software modification that changes the reset interval to output the count as discard the result f an excessive interval. The minimum switch ... or a combination of whether or not the pulse instruction is independent of 0.1 second) can be used for additional information.) Every 0.1 seconds, the 21X processor transfers the values f rom the 8 bit pulse counters into the designated Input Memory location.
... counts at the reset interval of the execution interval. lf the value is executed regardless of 1 sixteen bit counter and 2 eight bit counters. (Campbell Scientific has a hardware and software modification that changes the reset interval to output the count as discard the result f an excessive interval. The minimum switch ... or a combination of whether or not the pulse instruction is independent of 0.1 second) can be used for additional information.) Every 0.1 seconds, the 21X processor transfers the values f rom the 8 bit pulse counters into the designated Input Memory location.
21X Micrologger
Page 134
...activated by Instruction 96. lf an incorrect character is false (Figure 3.8-1). By using Program Control Instructions to execute if the test condition is detected, the 21X will not send any data without first receiving a command to the End Instruction. TAPE 1X -- There are then 4 seconds in Parameter 3 expires. ... Section 4.3 describes Tape output. The code tape must be 00, and for the lD it is not received within the time allotted in Campbell Scientific's PC208 datalogger support software enables PCIXT/AT/PS2 and compatible computers to have been stored. PRINTER. 2X --
...activated by Instruction 96. lf an incorrect character is false (Figure 3.8-1). By using Program Control Instructions to execute if the test condition is detected, the 21X will not send any data without first receiving a command to the End Instruction. TAPE 1X -- There are then 4 seconds in Parameter 3 expires. ... Section 4.3 describes Tape output. The code tape must be 00, and for the lD it is not received within the time allotted in Campbell Scientific's PC208 datalogger support software enables PCIXT/AT/PS2 and compatible computers to have been stored. PRINTER. 2X --
21X Micrologger
Page 139
...in feet. A small ( smV) caused by the input settling time constant which is a function of both determined by Equation 13.3-2, SECTION 13. 21X MEASUREMENTS U.J FIGURE 13.3-1. Figure 13.3-1 shows both cases the waveform is an exponential. v"o)e-tlRo"t, d"""y t13.3-21 where V, is the input voltage...CT = Cf+CwL [13.3-4] Cf = 3.3 nfd [13.3-5] where Cr is the fixed 21X input capacitance in farads, C", is the wire capacitance in farads/foot, and L is the wire length in Campbell Scientific sensors, and error estimates for tfe signal to the correct input level afe both the source ...
...in feet. A small ( smV) caused by the input settling time constant which is a function of both determined by Equation 13.3-2, SECTION 13. 21X MEASUREMENTS U.J FIGURE 13.3-1. Figure 13.3-1 shows both cases the waveform is an exponential. v"o)e-tlRo"t, d"""y t13.3-21 where V, is the input voltage...CT = Cf+CwL [13.3-4] Cf = 3.3 nfd [13.3-5] where Cr is the fixed 21X input capacitance in farads, C", is the wire capacitance in farads/foot, and L is the wire length in Campbell Scientific sensors, and error estimates for tfe signal to the correct input level afe both the source ...
21X Micrologger
Page 140
...column 3 of the maximum error (V.o for rising, V'"o for 3 Belden lead wires used in Campbell Scientific sensors is shown in column 6 of Rs and Rf, as shown in Equation 13.3-8. .21X HI OR LO INPUT FIGURE 13.3-3. Error 0.7 0.'l 0.004 Before proceeding with the shield tied ...to estimate the settling time constant is known, a quick estimation of the settling error as the resistance from the 21X input through 1 3.3-1 1, respectively. Figure 13.3-4 is a representation of long lead lengths on the measurement, a discussion on obtaining the source ...
...column 3 of the maximum error (V.o for rising, V'"o for 3 Belden lead wires used in Campbell Scientific sensors is shown in column 6 of Rs and Rf, as shown in Equation 13.3-8. .21X HI OR LO INPUT FIGURE 13.3-3. Error 0.7 0.'l 0.004 Before proceeding with the shield tied ...to estimate the settling time constant is known, a quick estimation of the settling error as the resistance from the 21X input through 1 3.3-1 1, respectively. Figure 13.3-4 is a representation of long lead lengths on the measurement, a discussion on obtaining the source ...
21X Micrologger
Page 141
...the same as if C* were between thQ signal lead and ground as compared to 360 degree wind direction range. Campbell Scientific uses only polyethylene and polypropylene insulated conductors in 21X sensors (see Table 13.3-2) since the jackets don't contribute to follow in units of degrees. Model024A Wind Direction... from 0 to 10 kohms over the 0 to a simple exponential. pair 8771 8723 j pair 1 shld. 3 cond. 2 shld. SECTION 13. 21X MEASUREMENTS SHIELD FIGURE 13.3-4. polyethylene 24 polyethylene 22 polypropylene 22 23 15 15 42 41 62 13.3.2 EFFECT OF LEAD LENGTH ON SIGNAL RISE TIME...
...the same as if C* were between thQ signal lead and ground as compared to 360 degree wind direction range. Campbell Scientific uses only polyethylene and polypropylene insulated conductors in 21X sensors (see Table 13.3-2) since the jackets don't contribute to follow in units of degrees. Model024A Wind Direction... from 0 to 10 kohms over the 0 to a simple exponential. pair 8771 8723 j pair 1 shld. 3 cond. 2 shld. SECTION 13. 21X MEASUREMENTS SHIELD FIGURE 13.3-4. polyethylene 24 polyethylene 22 polypropylene 22 23 15 15 42 41 62 13.3.2 EFFECT OF LEAD LENGTH ON SIGNAL RISE TIME...
21X Micrologger
Page 142
...Direction Error----- lf the peak transient level, V"o, is linearly related to the excitation voltage and increases as Campbell Scientific's Model 107 Temperature Probe, connected to the 21X. Values are eliminated up to lengths that significant error occurs at various directions and lead lengths (Table ... the true signal, Vro, the transient has no effect on , a transient is a single-shielded pair, used for leads in Campbell Scientific sensors. SHIELD FIGURE 13.3-6. TABLE 13.3-4. Measured Peak Excitation Transients for R1 equalto 1 kohm and 10 kohm. Instruction 4, Excite, ...
...Direction Error----- lf the peak transient level, V"o, is linearly related to the excitation voltage and increases as Campbell Scientific's Model 107 Temperature Probe, connected to the 21X. Values are eliminated up to lengths that significant error occurs at various directions and lead lengths (Table ... the true signal, Vro, the transient has no effect on , a transient is a single-shielded pair, used for leads in Campbell Scientific sensors. SHIELD FIGURE 13.3-6. TABLE 13.3-4. Measured Peak Excitation Transients for R1 equalto 1 kohm and 10 kohm. Instruction 4, Excite, ...
21X Micrologger
Page 144
... configurations A and C, respectively. An additional low value bridge resistor can be used with this configuration is shown in six Campbell Scientific sensors. A typical configuration is the high source resistance shown in Figure 13.3-7C optimizes the signal settling time because it becomes...Maximum Length(ft.) 1oOOl 18903 8652 4gO2 2ooo3 18603 I based on transient settling ' based on input settling time. 13-8 SECTION 13. 21X MEASUREMENTS lead length. lf the capacitive load is negligible, V, will settle to minimize the etfect of the thermistor, allowing more accurate curve...
... configurations A and C, respectively. An additional low value bridge resistor can be used with this configuration is shown in six Campbell Scientific sensors. A typical configuration is the high source resistance shown in Figure 13.3-7C optimizes the signal settling time because it becomes...Maximum Length(ft.) 1oOOl 18903 8652 4gO2 2ooo3 18603 I based on transient settling ' based on input settling time. 13-8 SECTION 13. 21X MEASUREMENTS lead length. lf the capacitive load is negligible, V, will settle to minimize the etfect of the thermistor, allowing more accurate curve...
21X Micrologger
Page 147
... channel 4 because it is the worst case. REFERENCE JUNCTION TEMPERATURE WITH 21X PANEL The 21X parfeltemperature is used as an estimate of the error which could occur in fre center of approximately 20oC. In Campbell Scientific's experience, the overall accuracy is designed to the other. The maximum ...+sooO. Any difference in temperature between the batteries and air temperature was subjected to the severe thermal gradient caused by bringing the 21X from one end of an external reference junction to +50oC range is the +0.2oC thermistor specification. The terminal strip cover is ...
... channel 4 because it is the worst case. REFERENCE JUNCTION TEMPERATURE WITH 21X PANEL The 21X parfeltemperature is used as an estimate of the error which could occur in fre center of approximately 20oC. In Campbell Scientific's experience, the overall accuracy is designed to the other. The maximum ...+sooO. Any difference in temperature between the batteries and air temperature was subjected to the severe thermal gradient caused by bringing the 21X from one end of an external reference junction to +50oC range is the +0.2oC thermistor specification. The terminal strip cover is ...