Images Scientific Instruments Inc
User Guide for Images Scientific Instruments models including: ADM-01, ADM-01 Analog Digital Radiation Meter, Analog Digital Radiation Meter, Digital Radiation Meter, Radiation Meter, Meter
Manuals
File Info : application/pdf, 12 Pages, 2.95MB
DocumentDocumentImages Scientific Instruments Inc. 109 Woods of Arden Road Staten Island NY 10312 718.966.3694 Tel 718.966.3695 Fax www.imagesco.com Construction Manual & Users Guide Model ADM-01 Analog Digital Radiation Meter The Analog Digital Radiation Meter counts the pulse output of a standard analog Geiger counter to provide a visual readout of the CPS, approximate radiation level (imperial/metric) and analog radiation field strength meter. Features: ·7-12VDC or 5VDC power supply input ·Counts TTL pulses from Analog Geiger Counter ·Outputs Digital Counts Per Second (CPS) value ·Outputs radiation level (imperial / metric) ·LCD Backlight ·Available as a kit or assembled Table of Contents Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Using the Meter. . . . . . . . . . . . . . . . . . . . . . . . . . 3 Powering the Unit . . . . . . . . . . . . . . . . . . . . . . . . 4 Selecting Imperial or Metric Readings. . . . . . . 4 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Circuit Construction. . . . . . . . . . . . . . . . . . . . . . 6 Mounting the Meter. . . . . . . . . . . . . . . . . . . . . . .8 ADM-01 Parts List. . . . . . . . . . . . . . . . . . . . . . . .8 Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . 9 Features The Analog Digital meter alternates the first line of its display between Counts Per Second (CPS) and then approximate radiation level in either imperial measurements (mR/hr) or metric measurements (mSv/hr). The top line of the display alternates its display every second. The 2nd LCD line is a analog radiation field strength meter that provides a quick visual indication of the current CPS reading. Figure 1 displays the reading in CPS, while Figure 2 shows the approximate radiation level. To fit nicely on the 8 character display line the imperial measurement of mR/ hr is abbreviated to mR. Likewise the metric measurement of mSv/hr is abbreviated to mS. The second line of the 8x2 LCD is a dedicated analog power meter to read a Figure 1 Figure 2 reasonable approximation of CPS from 1 CPS to 2040 CPS. * The LCD alternates between display the mR/hr value and CPS. The CPS 2 value used for the power meter display portion is update on each display screen. The following table illustrates the relationship between the analog power graphic and the CPS value. Using the Analog Digital Meter Images' Analog Digital Meter allows you to add a digital display to your analog Geiger counter. The default display will provide readings in CPS and mR/ hr. The ADM-01 has two switches on the right hand side of the board. The bottom switch is the power switch. The top switch allows you to turn the backlight on the LCD on and off. Powering the unit: 3 The ADM-01 may be powered by a 7-12V (transistor) battery or by a regulated 5 volt power supply. When powered by the 7-9 volt battery the ADM-01 board may source 5 volts 50 mA of 5V current, off its 5V in/out line. Units that are purchased assembled are set up for 5VDC. The PCB connection pads, are .100 spaced and you can connect to the board using female /male headers or 22ga. wires depending upon your application. In this example we are connecting to the ADM-01 using wires. In our example we are powering the ADM-01 board using a 5 volt power supply (red wire), Ground (GND black wire) and the B0 (white wire) soldered on the PCB as shown below in figure 4. For additional wiring options see page 9. Selecting Imperial (mR/hr) or Metric (mSv/hr) Radiation mR/hr mSv/hr Header Figure 4 Back View & Close Up Measurement: Figure 4 also shows a two pin header, outlined using a red box. Placing a jumper on this two-pin header will change the radiation reading from imperial mR/ hr to metric mSv/hr radiation measurement. 4 Figure 5 5 Construction Figure 5 shows the schematic for the Analog Digital Radiation Meter (ADM01). Figure 6 is the blank PCB. All components are mounted and soldered to the top silkscreened side of the board unless otherwise noted. Figure 6 To begin mount and solder the 5-pin 10K resistor pack (R1). Pin 5 (last pin when reading the text on the resistor) should go in the top hole of R1 on the PCB. Mount and solder the 20K potentiometer at R2. Next mount and solder the two .1uf 50V capacitors (C1 & C2), followed by C3, the 10uf 16V capacitor. Depending on your casing of the unit, this capacitor may need to bent flat prior to soldering, as shown in the completed circuit, Figure 7 on the next page. Now mount and solder the 1N4007 diode, D1. Be sure to align the markings on the diode with the silkscreened outline on the pcb. Next mount and solder the voltage regulator, 78L05 at U1, again, making sure to align it with the printed silkscreen outline. Mount and solder the 18-pin IC socket at U2. Align the notch on the IC socket with the notch on the silkscreened outline. This will aid in the proper installation of the microcontroller. Next mount and solder the two right angle slide switches, S1 & S2. S4 is a 2-pin header. Adding a jumper to this header allows 6 one to switch the unit from mR/hr to mSv/hr. The two 8-pin headers should be mounted and soldered to the underside of the pcb at D2, as shown in Figure 7 at the right. Place the LCD down onto the headers and solder into place. Insert the preprogrammed 16F88 microcontroller into the IC Figure 7 socket. Be sure to line up the notch in the chip with the notch in the socket. You need to think about how you want to connect the ADM-01 to your circuit and what power supply you want to use. The ADM-01 is a versatile development board for the 16F88 PIC microcontroller. Figure 8 below illustrates the lines available to the user. In this application we are using it as an AnalogDigital-Meter and we only need to use three lines. Figure 8 Front View 7 *You are now ready to connect the Analog Digital Radiation meter to an analog Geiger counter. Connect the white wire to the pulse output of the Geiger counter. Make sure both the Geiger counter and ADM-01 meter share a common ground. Various wiring diagrams are included on the following pages. Mounting the Meter The mounting outline measurements for the ADM-01 are shown in Figure 9. These measurements are taken in millimeters. Figure 9 ADM-01 Parts List (1) PCB-73 (2) CAP-.1uf-50V (1) CAP-10uf-16V (1) RES -10K-5pin (1) POT-20K-Top (1) 1N4007 (1) 78L05 (1) PIC16F88 (1) ICS-18 (2) SW-27 (1) LCD-01-8x2 (2) SMH-08 (1) SMH-02 (1) Jumper (1) Manual C1 C2 C3 R1 R2 D1 U1 U2 Misc. Materials - 3 feet of stranded wire (each in different color) 8 Wiring Options for ADM-01 Analog / Digital Meter The following images show a variety of wiring options available for our Analog Digital Meter. Figure 10 Figure 11 Figure 10 outlines wiring connec- tions for supplying the unit with 5V power. Figure 11 outlines the wiring for 9V. Jumping Figure 12 the switch controls, as in Figure 13 Figure 12, would supply the unit with con- stant power and backlight. Power is supplied by either 5 or 9 volts, and is constant when your Geiger counter is turned on. Figure 13 outlines how to wire the unit if you choose to use external switches and/or contrast control. 9 Wiring Options for ADM-01 Analog / Digital Meter The following images shows power and pulse connections to GCK/GCA-01. Figure 14 10 Wiring Options for ADM-01 Analog / Digital Meter The following images shows power and pulse connections to GCK-02. Figure 15 11