Gebruiksaanwijzing /service van het product 4-Channel Current/Voltage SDM-CVO4 van de fabrikant Campbell
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SDM-CVO4 4-Channel Current/Voltage Output Module User Guide Issued: 13.3.08 Copyright © 2001-2007 C ampbell Scientific Inc. Printed under Licence by Cam pbell Scient ific Ltd.
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Guarantee This equipment is guaranteed against defects in materials and workmanship. This guarantee applies for twelve months from date of delivery. We will repair or replace products which prove to be defective during the guarantee period provided they are returned to us prepaid.
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Contents 1. Introduction .................................................................. 1 2. Specifications .............................................................. 2 2.1 General Specifications ...............................................
Contents Tables 4-1. Datalogger to SD M-CVO4 Connections................................................. 4 4-2. Switch Position and Addresses ............................................................. 10 6-1. Description of Instruction 103 .......
SDM-CVO4 4-Channel Current/Voltage Output Module The SDM-CVO4 is a synchronously addressed dat alogger peripheral designed to allow the datalogger to output variable voltage or current signals under program control. Figure 1. SDM-CVO4 (shown without mounting brackets) 1.
SDM-CVO4 4-Channel Current/Voltage Output Module The SDM-CVO4 is a synchronously addre ssed data logger peripheral. Datalogger control ports 1, 2 and 3 are used to address the SDM -CVO4 and send out data that defines the desired voltage/c urrent output of each of th e four channels.
Instruction Manual 2.2 Output Specifications Voltage Mode: Range: 0 – 10,000 m V Resolution: 2.5 mV Maxim um Output Current : 30 mA per channel. Minimum load current: 5 μ A if output < 200 m V. A ccuracy (+23 ° C) ± 0.02% of set voltage, + ( ± 2.
SDM-CVO4 4-Channel Current/Voltage Output Module 3. Power Considerations The SDM-CVO4 power requireme nts are large compared to most Cam pbell Scientific products, especi ally when driving signi ficant loads. Care m ust be taken to ensure that the power supply can cope wi th this higher dem and.
Instruction Manual insert a small screwdriver into either the top or front slot, as appropriate , and push to open the term inal spring. Strip any i nsulation from the wire to give 7 to 9 m m bare wire. Push the wire into the opening, and, whi le holding it i n position, withdraw the screwdriver to release the sp rin g.
SDM-CVO4 4-Channel Current/Voltage Output Module 4.2 Output Device Connections For each output channel there are f our terminals which are labelled V o , Id plus there are two ground ( ) connections per channel. The two ground term inals are internally connected; two are provided for convenience.
Instruction Manual a) The remote device powers the l oop, where, depending on the ground referencing requirement s of that device, the connecti on can be as shown in the diagrams below: V+ Remote Vol .
SDM-CVO4 4-Channel Current/Voltage Output Module 4.2.3 Shield and Ground Connections It is generally advi sable to used shie lded (screened) cable when connecting the output to any rem ote system to reduce the chances of noise pickup. The shield will only be effective if it is conn ected to a good ground reference point.
Instruction Manual Select channel(s) by fitting jumper (s) between appropriate terminals. (Current mode only.) Jumper shown fitted to ‘enable’ Channel 4.
SDM-CVO4 4-Channel Current/Voltage Output Module Table 4-2. Switch Position and Addresses Sw itch Setting Base 4 Address 0 00 1 01 2 02 3 03 4 10 5 11 6 12 7 13 8 20 9 21 A 22 B 23 C 30 D 31 E 32 F 33 Use a screwdriver to select address Figure 4-4. Address Selection Switch The address switch has a hexadecim al setting posit ion (0.
Instruction Manual Where the SDM-CVO4 is going to be used in applications where the po tential difference between the datalogger and the output terminals exceeds 50 V RMS AC, 74 VDC then careful considerati on has to be taken to ensure safe operation and compliance with local safety regu latio n s.
SDM-CVO4 4-Channel Current/Voltage Output Module this device is at the low end of its to lerance band (±10%), combined with the normal tolerance of flash test devi ces, then the spark gap could fire during a 1500 VAC flash test , which may cause an indication of failure.
Instruction Manual compensated for. With the SDM-CVO4 as an ex citation source, any drift in its output accuracy, or of the logger m easurem ent accuracy, can result in a combination of those errors. It is wort h investigating, therefore, the exact requirements of t he sensors you wish to use.
SDM-CVO4 4-Channel Current/Voltage Output Module range of -20 ° C to +50 ° C would be scaled so at -20C the output is 0 m V and at +50 ° C the output is 10000 m V.
Instruction Manual If the SDM-CVO4 loses power for any reas on, when power is restored the outputs will return to the default ‘off’ state. This will be held until the datalogger runs Instruction 103 again to update the output levels requi red.
SDM-CVO4 4-Channel Current/Voltage Output Module 4: Volt (SE) (P1) 1: 1 Reps 2: 32 50 mV, 50 Hz Reject, Sl ow Range 3: 3 SE Channel 4: 4 Loc [ Radiation ] 5: 100 Mult 6: 0.
Instruction Manual 7: -1666.67 B3 8: 10 A4 9: -5000 B4 ; Now update the SDM-CVO4 wi th the information ; for the four channels 11: SDM-AO4 (P103) 1: 4 Reps 2: 30 SDM Address 3: 5 Loc [ ScldOut_1 ] 6.
SDM-CVO4 4-Channel Current/Voltage Output Module ; then set the value to –3000 13: Z=F (P30) 1: -3000 F 2: 00 Exponent of 10 3: 5 -- Z Loc [ ScldOut_1 ] 14: End (P95) 15: End (P95) ; Now update the SDM-CVO4 wi th the information ; for the four channels 16: SDM-AO4 (P103) 1: 4 Reps 2: 30 SDM Address 3: 5 Loc [ ScldOut_1 ] 6.
Instruction Manual ; Wait 100 m it to power-on an s for d the outputs to stabilize ; You ma increase this dela y need to y if the sensors ; themselves ; have a power-on delay 3: Excitation with Delay (P22) 1: 1 Ex Channel 2: 0000 Delay W/Ex (units = 0.
SDM-CVO4 4-Channel Current/Voltage Output Module 6.3 CRBasic SDMCVO4 Instruction This instruction is used to co ntrol the SDM-CVO4 four chann el cu rrent/voltage output device. Syntax SDMCVO4 ( CVO4Source, CVO4Reps , SDMAddress, CVO4Mode ) Remarks This instruction cont rols the SDM-CVO4, which out puts a voltage or a current.
Instruction Manual be cycled on the dev ice to return it to its default state. Otherwise, if 0 or 1 is entered it will be i gnored and the device will remain in its last override st ate.
SDM-CVO4 4-Channel Current/Voltage Output Module EndIf ' Scale the measurements for the SDM-CV O4 to output 0-10000 mV WSOut = WS_ms*200 'WS: 0-50 m /s = 0-10000 mV WDOut = WD_0_540 *18.
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Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 Nort h Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Afri ca Pty. Lt d. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.
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