Related Manuals for Antec Scientific DECADE II 171
Summary of Contents for Antec Scientific DECADE II 171
- Page 1 Antec Scientific Industrieweg 12 2382 NV Zoeterwoude The Netherlands DECADE II Electrochemical Detector User manual 171.0011, Edition 12, 2015 T +31 71 5813333 | info@AntecScientific.com | https://AntecScientific.com...
- Page 2 Copyright ©2015, Antec, The Netherlands. Contents of this publication may not be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from the copyright of the owner. The information contained in this document is subject to change without notice. ROXY, ALEXYS, DECADE, DECADE II, INTRO, Flexcell, ReactorCell, SenCell, VT-03, µ-PrepCell, SynthesisCell, ISAAC, HyREF are trademarks of Antec.
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Page 3: Declaration Of Conformity
Chapter 1 DECADE II electrochemical detector Declaration of conformity We Antec Leyden B.V., Zoeterwoude, The Netherlands, declare that the product DECADE II™ Electrochemical Detector type 171 to which this declaration relates, is in conformity with the following directives: Safety (2006/42/EC) Safety requirements for laboratory equipment IEC61010-1:2001 2 (Class I, Installation cat. -
Page 4: Intended Use
DECADE II user manual, ed. 11 Intended use For research purposes only. While clinical applications may be shown, this instrument is not tested by the manufacturer to comply with the In Vitro Diagnostics Directive. WEEE directive All equipment of Antec Leyden which are subjected to the WEEE directive shipped after August 13, 2005 are compliant with the WEEE marking requirements. -
Page 5: Symbols
Chapter 1 DECADE II electrochemical detector Symbols The following symbol are used on the rear panel and oven compartment of the DECADE II: Consult the manual for further safety instructions Frame or chassis ground terminal The following pictograms are used in the DECADE II manual: Caution Caution, risk of electric shock or other electrical hazard (high voltage) -
Page 6: Safety Practices
DECADE II user manual, ed. 11 Safety practices The following safety practices are intended to insure safe operation of the equipment. Electrical hazards The removal of protective panels on the instrument can result in exposure to potentially dangerous voltages. Therefore, disconnect the instrument from all power sources before disassembly. -
Page 7: Spare Parts And Service Availability
Chapter 1 DECADE II electrochemical detector socket. The power source should exhibit minimal power transients and fluctuations. Replace faulty or frayed power cords. Place the detector on a flat and smooth surface. Do not block the fan located at the bottom of the detector. Blocking the fan will impair the cooling capability of the power supply. -
Page 8: Table Of Contents
DECADE II user manual, ed. 11 Table of contents Declaration of conformity 3 Intended use 4 WEEE directive 4 ROHS directive 4 Symbols 5 Safety practices 6 Spare parts and service availability 7 DECADE II electrochemical detector 11 Installation guide 13 Unpacking 13 Installation 13 Maintenance 17... -
Page 9: Chapter 1 Decade Ii Electrochemical Detector
Chapter 1 DECADE II electrochemical detector Low pass noise filters 42 Amplitude response plot 43 Applying ADF in chromatography 45 Events and time files 49 Introduction 49 Step by step example 49 Output events 51 Pulsed amperometric detection 55 Introduction 55 Pulse vs. - Page 10 DECADE II user manual, ed. 11 RS232C 77 Troubleshooting guide 79 No detector response 79 High cell current 79 Noisy baseline 79 Decreased sensitivity (low S/N ratio) 80 Base line oscillations 80 Saturation of output 80 Dummy cell 81 External dummy cell 81 Internal dummy cell 82 Detector accessories 83 Index 84...
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Page 11: Decade Ii Electrochemical Detector
Chapter 1 DECADE II electrochemical detector C H A P T E R DECADE II electrochemical detector Congratulations on your purchase of the DECADE II. This detector enables you to perform all applications using electrochemical detection. The DECADE II includes a highly stable Faraday-shielded oven compartment accommodating column and flow cell. - Page 12 DECADE II user manual, ed. 11...
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Page 13: Installation Guide
CHAPTER 2 Installation guide C H A P T E R Installation guide Unpacking Inspect the transport box for possible damage as it arrives. Immediately inform the transport company in case of damage, otherwise she may not accept any responsibility. Keep the transport box as it is designed for optimum protection during transport and it may be needed again. - Page 14 DECADE II user manual, ed. 11 Table I. Environmental conditions Parameter Requirement -40 – 50 C (-104 – 122 Storage temperature 0 – 90%, non-condensing Storage humidity 4 – 40 C (39 – 104 Operating temperature 20 – 80%, non-condensing Operating humidity Place the detector on a flat and smooth surface.
- Page 15 CHAPTER 2 Installation guide Fig. 3. Installation of the DECADE II. 4. Prior to connection of the HPLC system to the detector all metal parts should preferably be passivated with 15% nitric acid during 20 min. Make sure that all parts that are not acid-resistant such as: nylon inlet filters, column and flow cell are not connected during this step.
- Page 16 DECADE II user manual, ed. 11 7. Passage of air bubbles through the flow cell will lead to unacceptable noise levels and ‘spikes’. Therefore, the use of an in-line degasser is strongly recommended. In our experience, a one-time degassing step of the HPLC buffer is almost never sufficient. 8.
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Page 17: Maintenance
CHAPTER 2 Installation guide The DECADE II has been developed for continuous operation. For maximum stability it is advised to leave the system ON continuously. If preferred, the flow cell may be switched OFF at night. Maintenance Perform periodic leak checks on LC tubing and connections and check if the drain on the bottom of the oven compartment is not blocked or closed. - Page 18 DECADE II user manual, ed. 11...
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Page 19: Decade Ii Controller
CHAPTER 3 DECADE II controller C H A P T E R DECADE II controller Introduction The DECADE II has been designed for maximum functionality and ease of use. The control of ECD parameters is such that without reading this chapter, it should be possible to operate the detector. -
Page 20: Overview Of Decade Ii Screens
DECADE II user manual, ed. 11 Overview of DECADE II screens V o u t = + 0 . 0 5 7 V = + 2 3 . 4 5 n A R a n g e = 5 0 n A = + 0 . - Page 21 CHAPTER 3 DECADE II controller V o u t = + 0 . 0 5 7 V = + 2 3 . 4 5 n A P U L S E R a n g e = 5 0 n A = + 0 .
- Page 22 DECADE II user manual, ed. 11 V o u t = + 0 . 0 5 7 V = + 2 3 . 4 5 n A S C A N R a n g e = 5 0 n A = + 1 2 0 1 m V R E M O T E C o m p = o f f...
- Page 23 CHAPTER 3 DECADE II controller A n t e c L e y d e n M A I N D E C A D E - I I L C - E C w o r k s t a t i o n 2 .
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Page 24: Parameters
DECADE II user manual, ed. 11 Parameters Explanation: Type S is status, F is function and C is control. Parameter screen Description Type 28 > 30˚C dc stat Displays the actual (left value) and the pulse stat pre-set oven temperature (right value). scan stat prog Adds the active data line to the time file... - Page 25 CHAPTER 3 DECADE II controller Parameter screen Description Type compensation only, not the % offset! CONFIG main Enters config screen Contrast config Sets the contrast of display Displays the cycle counter. If a time file has to be executed more than once (‘Cycles’>1), this is the number of times a time file has been started (see page 39).
- Page 26 DECADE II user manual, ed. 11 Parameter screen Description Type scanning) EndCycle prog Enters a screen to set EndCycleTime. Controls duration of a time file (max. 999.99 min). When this time is reached the execution of the time file stops. If programmed, the next run is started.
- Page 27 CHAPTER 3 DECADE II controller Parameter screen Description Type electrically actuated injector is used (optional) it is possible to switch the injector with this function button. Enters ‘KEYB’ screen, for keyboard KEYB test test. Press 2x F1 to leave. MARK dc stat, Triggers a marker signal on output.
- Page 28 DECADE II user manual, ed. 11 Parameter screen Description Type scan stat events setup Enters RUN screen. System waits (“waiting”) for the ‘START’ input trigger (external or keyboard) to start a run. scan setup Scan speed, can be set from 1 - 50 mV/s in 1, 2, 5 steps.
- Page 29 CHAPTER 3 DECADE II controller Parameter screen Description Type a time file must be programmed by EndCycleTime. Toven dc setup, Controls the temperature of the oven. Range: off, 15 - 45˚C, selectable in 1˚C pulse setup1 steps. The oven is stable from 5 ˚C above ambient.
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Page 30: Alexys ® Decade Ii Driver
DECADE II user manual, ed. 11 ® ALEXYS DECADE II driver Full control and data acquisition is supported in ALEXYS data system. Important difference with stand-alone operation is that timed events are not executed from time files, but from the events page in ALEXYS software. DECADE II time files are not supported in ALEXYS data system. - Page 31 CHAPTER 3 DECADE II controller A unique feature of ALEXYS data system is the scanning voltammetry module. From the DECADE II device driver window all parameters are set. The so called “scan shell” is opened and the scan is started.
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Page 33: Detection And Parameters
CHAPTER 4 Detection and parameters C H A P T E R Detection and parameters Introduction One of the characteristics of electrochemical detection is its tremendous dynamic range. In amperometric detection peak heights may vary from micro-amperes down to the pico-ampere range. The DECADE II covers such a wide range from 200 µA down to 10 pA full scale, without being limited by electronic noise. -
Page 34: Serial Mode Detection
DECADE II user manual, ed. 11 commands and hardware interrupts. The sensor board is fully dedicated to data acquisition and flow cell control. By using this architecture it is possible to extend the functionality of the DECADE II to more than one flow cell by simply adding a sensor board. The control board and other hardware is prepared for more than one sensor board. -
Page 35: Navigation In Dual Cell Menu
CHAPTER 4 Detection and parameters Fig. 13. Typical configuration for parallel mode detection. Two independent HPLC systems with dual channel support from OR 100, DECADE II and ALEXYS data system. Fig. 14. DECADE II with 2 columns and 2 VT-03 flow cells for parallel detection. -
Page 36: Parameters
DECADE II user manual, ed. 11 status screen is available in dual cell systems which indicates the status of both cells in a single screen. However, for convenience it is advisable to use PC control from ALEXYS data system when working with 2 flow cells. A n t e c L e y d e n M A I N... -
Page 37: Offset
CHAPTER 4 Detection and parameters there is a trade off between best noise specification at sensitive ranges, and maximum compensation at the less sensitive ranges. This is an inevitable consequence of the tremendous dynamic range that is covered by electrochemical detection. Table II. -
Page 38: Polarity
DECADE II user manual, ed. 11 A maximum offset of +50% and - 50% in 5% steps can be set. For example, 20% is a 200 mV offset when the maximum output is 1.0 Volt (2 V at max. 10.0 V). Polarity The polarity of the output can be inversed. -
Page 39: Noise Suppression: Adf
Noise suppression: ADF™ CHAPTER 5 C H A P T E R Noise suppression: ADF™ Introduction Besides for its tremendous linear dynamic range and selectivity, electrochemical detection is well-known for its very low limits of detection. To further improve these detection limits the Antec Leyden engineers have developed ADF (Advanced Digital Filter) and the DECADE II has been equipped with it as a standard. -
Page 40: Frequency Of Signal And Noise
DECADE II user manual, ed. 11 400000 300000 200000 100000 -100000 -200000 -300000 -400000 Fig. 18. Example of a signal with regular evenly spaced alterations: a sine. 400000 300000 200000 100000 -100000 t (min) -200000 -300000 4.15 4.56 -400000 Fig. 19. Sine of Fig. 18. A full period is 0.41 min (25 s) which corresponds to a frequency of 1/25 = 0.04 Hz. - Page 41 Noise suppression: ADF™ CHAPTER 5 This is further illustrated by an overlay of the same chromatographic peak with a sine of 0.07 Hz (Fig. 21). 540000 440000 340000 240000 140000 40000 Fig. 21. Overlay of a chromatographic peak with 0.07 Hz sine. Typically in chromatography narrow peaks are in front of a chromatogram while peaks with longer retention times get wider.
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Page 42: Low Pass Noise Filters
DECADE II user manual, ed. 11 sine f = 10 Hz sine f = 0.4 Hz t (s) Fig. 23. Typical random noise in chromatography (lower trace). Both frequencies (0.4 and 10 Hz) can be recognised amongst others. Looking closely to the lower noise trace both frequencies (and others) can be recognised. -
Page 43: Amplitude Response Plot
Noise suppression: ADF™ CHAPTER 5 Each input data point has the same weighting factor of 1/5. In more advanced digital signal processing a more complicated equation is used to calculate the output data point y[n]: In contrast to the previous equation, each data point has a different weighting factor a. - Page 44 DECADE II user manual, ed. 11 This cut off frequency is where the output signal amplitude is 70% of the input signal, also known as 3 dB point. Freq uency (Hz) Fig. 25. An amplitude response plot of a low pass filter with a cut-off frequency of 1 Hz.
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Page 45: Applying Adf In Chromatography
Noise suppression: ADF™ CHAPTER 5 improves with more input data points, but also more processor capacity is required for the large number of calculations. Applying ADF in chromatography If noise frequencies in LC-EC differ from the frequency of the signal, noise can be suppressed. - Page 46 DECADE II user manual, ed. 11 Prerequisite for a ‘good’ noise filter for data acquisition in liquid chromatography is that it improves the S/N ratio without significant distortion of the signal of interest. This is particularly difficult if the frequency of the signal is close to the frequency of the noise.
- Page 47 Noise suppression: ADF™ CHAPTER 5 unfiltered signal. As high frequency noise is suppressed, remaining noise components will be in the same frequency range as chromatographic peaks. As suppressing noise will always result in (some) suppression of signal it is advised to switch the DECADE II to the highest acceptable sensitivity.
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Page 49: Events And Time Files
CHAPTER 6 Events and time files C H A P T E R Events and time files Introduction Running an Events table (time file) enables a time-based, automated and full parametric control of electrochemical detection (ECD). This is particularly useful when during a run or between runs settings have to be changed such as the sensitivity, auto zero or control of external equipment (i.e. - Page 50 DECADE II user manual, ed. 11 Go from MAIN, DC SETUP to DC STAT screen to see if the cell is ON or not. Set the cell to the desired status and return to DC SETUP. From the DC SETUP screen select 'EVENTS'. In the EVENTS SETUP screen, select file number 'File = 1', actual cell potential 'Ec = 0.80 V', and the number of cycles 'Cycles = 1'.
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Page 51: Output Events
CHAPTER 6 Events and time files T i m e 1 1 2 E n d C y c l e T i m e P R E V S C R O L L To start the time file , select RUN from the EVENTS SETUP screen. The RUN screen appears and the system is waiting for a start command. - Page 52 DECADE II user manual, ed. 11 Auto zero Enables external activation of the auto zero command. This function is active only when the ‘I-cell’ is displayed. To pos I, L Forces the electrically actuated injector to position L (load) or I (inject). Cell on, off Switches on (off) the flow cell.
- Page 53 CHAPTER 6 Events and time files Table VI. I/O contacts connector B. Name Function 1 - 3 Common Ground Free TTL input Mark Baseline spike of 10% FS, duration: 0.1 s Status I Status read of electric valve, pos B (inject) Status L Status read of electric valve, pos A (load) 8 - 11 Common...
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Page 55: Pulsed Amperometric Detection
CHAPTER 7 Pulsed amperometric detection C H A P T E R Pulsed amperometric detection Introduction Several advanced features are implemented in the DECADE II. One of these features is the so-called pulse mode. In pulsed amperometric detection (PAD) the working electrode (WE) is regenerated at a frequency of 0.5 - 3 Hz by the application of a series of potential changes. -
Page 56: Pulse Vs. Dc
DECADE II user manual, ed. 11 Pulse vs. DC The pulse mode is quite different from the DC mode: The output signal is sampled during a fraction of the total pulse cycle. During the sampling time (ts) the signal generated at the WE is collected and this value is sent to the detector output. -
Page 57: Pulse Settings
CHAPTER 7 Pulsed amperometric detection Pulse settings In PAD of carbohydrates the working potential is applied as a series of 3 potentials. During time interval t1 the detection potential is applied. The data collection occurs within t1, during time interval ts (sampling time). The time difference t1 - ts is the stabilisation time. - Page 58 DECADE II user manual, ed. 11 accelerated and a shorter time setting may be chosen. In practise an E2 value of +750 mV during 200 ms (t2) gives good results. The choice of t3 is depending on the potential E3 and the t2 and E2 setting. It is essential that the duration of t3 and the magnitude of E3 is such that a complete removal of the metal oxide is achieved.
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Page 59: Output Frequency
CHAPTER 7 Pulsed amperometric detection Output frequency An important difference between the DC and the pulse mode is the frequency of the output signal on the output. In the DC mode the signal has a 10 Hz frequency, in the pulse mode the frequency is determined by the duration of the pulse. -
Page 60: Working Electrode Material
DECADE II user manual, ed. 11 and B). Matching the frequencies keeps the peak shape unchanged (Fig. 33C). Decreasing the integrator frequency to less than half the pulse frequency, changes the peak shape (Fig. 33E). When the peak width is too small there are two options: either less data points are collected for such a peak, or the pulse and integrator frequency are both increased. - Page 61 CHAPTER 7 Pulsed amperometric detection Fig. 34. Change in cell current during PAD. The cell current of the noble metals gold (Au) and platinum (Pt) is stabilised faster than the cell current of glassy carbon (GC), due to a much lower capacitance of the noble metals. For Pt and GC the negative peaks run far off-scale, however the profile is similar to the mirror image of the positive peaks.
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Page 62: References
DECADE II user manual, ed. 11 Table IX. LC-EC conditions for PAD of carbohydrates. detector DECADE II flow rate 1.0 ml/min mobile phase 200 mM NaOH disaccharides 100 nmol/l, 20 l injection sample temperature flow cell VT-03 flow cell with 3.0 mm gold working electrode mounted with 50 µm spacer Hy-REF I-cell... -
Page 63: Optimisation Of Working Potential
CHAPTER 8 Optimisation of working potential C H A P T E R Optimisation of working potential Introduction A current - voltage (I/E) relationship, or voltammogram, characterises an analyte. It gives information on the optimum working potential, which can be used to improve detection sensitivity and selectivity. -
Page 64: Hydrodynamic And Scanning Voltammogram
DECADE II user manual, ed. 11 Hydrodynamic and scanning voltammogram A hydrodynamic voltammogram is constructed when the pure analyte is not available and separation over an analytical column is required. Furthermore, under real chromatographic conditions reliable information about the S/N ratio is obtained In case of metal working electrodes it is also advisable to use a hydrodynamic voltammogram. -
Page 65: Optimisation Using A Voltammogram
CHAPTER 8 Optimisation of working potential As can be seen in both Fig. 36 and Fig. 37, when the working potential is increased the electrochemical reaction is enhanced hence the signal increases. At a certain potential the I/E curve flattens. All analyte molecules that reach the working electrode are converted at such a high rate that the analyte supply becomes the limiting factor. - Page 66 DECADE II user manual, ed. 11 compound of interest, optimisation of selectivity in this way is not possible and the chromatography has to be optimised. Electrochemical detection differs from most other LC detection methods in that a reaction takes place in the detection cell. Due to reaction kinetics an increased temperature speeds up the oxidation/reduction reaction.
- Page 67 CHAPTER 8 Optimisation of working potential Fig. 39. At a higher pH the I/E curve of norepinephrine is shifted to the left. Reaction kinetics predict that electrochemical detection is mass flow dependent. When the LC flow is stopped in LC-EC, the analyte will be oxidised completely and the signal decreases rapidly.
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Page 68: Construction Of A Hydrodynamic Voltammogram
DECADE II user manual, ed. 11 Construction of a hydrodynamic voltammogram Before a hydrodynamic voltammogram can be obtained, the chromatographic conditions should be optimised. Then the following steps are taken: 1. A solution of the analyte at a concentration between 1 - 100 mol/l, is prepared in mobile phase. - Page 69 CHAPTER 8 Optimisation of working potential Fig. 42. The scanning voltammograms of 2,4-dimethylphenol (DMP), phenol (P), 2-chlorophenol (2-CP) and 4-nitrophenol (NP). The following procedure is used to obtain the voltammograms in Fig. 37 and Fig. 42: 1. The column is removed from the LC system. The voltammogram is recorded in the flow injection analysis (FIA) mode.
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Page 70: Using Scan Mode In Alexys Data System
DECADE II user manual, ed. 11 Fig. 43. Chromatogram of the analyte plug obtained in the DC mode. Scanning takes place on top of the broad peak between 0.5 and 2.5 min after injection in FIA mode. 5. The sampling frequency of the integrator is set at 1 Hz. This is the same frequency as the voltage steps during the scan. - Page 71 CHAPTER 8 Optimisation of working potential...
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Page 73: Specifications Decade Ii
CHAPTER 9 Specifications DECADE II C H A P T E R Specifications DECADE II General specifications Power 110-240 VAC, 50/60 Hz, 260 VA, autosensing Operating modes DC, PAD and Scan Potential range between +2.00 and - 2.00 V in 10 mV increments or +2.50 and - 2.50 V in 10 mV increments (DECADE II MD: p/n 171.0035MD and 171.0038MD) Output... -
Page 74: Pulse Mode
DECADE II user manual, ed. 11 PULSE mode 10 nA – 200 µA in 1, 2, 5 steps Range 0.5 – 0.01 Hz in 1, 2, 5 steps Filter (cut off) Pulse times t1: 100 - 2000 ms; t2: 0 - 2000 ms; t3: 0 - 2000 ms in 10 ms steps Sample times 20 ms - (t1 - 60 ms), with 20 ms increments... -
Page 75: Error Messages
CHAPTER 10 Error messages C H A P T E R Error messages Table X. Error messages. Error Message Incompatible boot version Control board error Sensor board x error (x = board number) Firmware program error Record error Incompatible FW version Incompatible FW Control board FW erase failed Sensor board x... - Page 76 DECADE II user manual, ed. 11...
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Page 77: Rear Panel
CHAPTER 11 Rear panel C H A P T E R Rear panel Connectors A, B and C For detailed information on the I/O contacts see page 52. Fig. 44. DECADE II rear panel. RS232C The RS232 interface provides full parametric control from a PC. Programmable parameters comprise cell potential, range, auto zero, offset, filter, electrical injector and control of DECADE II output contacts for control of external equipment. - Page 78 DECADE II user manual, ed. 11 The manufacturer will not accept any liability for damage, direct or indirect, caused by connecting this instrument to devices that do not meet the relevant safety standards.
- Page 79 CHAPTER 12 Troubleshooting guide C H A P T E R Troubleshooting guide No detector response Possible cause Remedy No power Check line voltage setting, plug in power cord Power switch off Turn this switch ON (at the rear panel) Faulty fuse Replace fuse Divergent mains voltage...
- Page 80 DECADE II user manual, ed. 11 Decreased sensitivity (low S/N ratio) Possible cause Remedy Fouled WE by dirty samples Clean WE, if possible: dilute samples Cell potential too low Optimise potential Contaminated buffer (high Replace buffer, do not recycle the buffer cell Base line oscillations Possible cause...
- Page 81 CHAPTER 13 Dummy cell C H A P T E R Dummy cell External dummy cell A successful dummy cell test confirms that the controller, including the cell cable, functions properly. If the result of the noise measurement with the dummy cell is within specs, the controller is excluded in a trouble shooting procedure.
- Page 82 DECADE II user manual, ed. 11 Internal dummy cell From the MAIN screen DIAG can be selected to enter the DIAG screen, followed by selecting NOISE. This activates a timer in the NOISE screen, and after 5 min stabilisation auto zero is activated and the dummy cell test is ready.
- Page 83 CHAPTER 14 Detector accessories C H A P T E R Detector accessories The electrochemical detector is shipped together with a number of parts. The listing in Table below may not be complete, see check list of delivery for complete listing. Table XIII.
- Page 84 DECADE II user manual, ed. 11 Index...
- Page 85 Index ADF, 39 Amplitude response, 43 Auto zero, I/O contact, 52 AUX1, I/O contact, 52 AUX2, I/O contact, 52 buttons DECADE II keyboard, 19 capacitance WE, 61 carbohydrates chromatogram, 55 pulse settings, 60 Cell off, I/O contact, 52 Cell on (off), I/O contact, 52 cell on, I/O contact, 52 cleaning of detector, 17 Common, I/O contact, 52, 53...
- Page 86 DECADE II user manual, ed. 11 Inject marker, I/O contact, 53 inject marker, trigger, 51 installation DECADE II, 13 integrator connection of trigger, 51 pulse mode frequency, 59 keyboard DECADE II, 19 maintenance cleaning of detector, 17 detector, 17 Mark, I/O contact, 53 maximum compensation, 36 messages, 75 noise, 15, 16, 56, 58, 68, 73, 79...
- Page 87 Index scan mode example, 68 scanning voltammogram, 64 specifications, 74 service, 6 spare parts, 6 specifications DECADE II, 73 Start, I/O contact, 52 Status I, I/O contact, 53 Status L, I/O contact, 53 t1, control, 28 Tefzel rotor, 56 timefile, 49 example, 49 To I, I/O contact, 53 To L, I/O contact, 53...
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