Valhalla 2105AC Operation Manual Download Page 48

Page: 48 / 56

YELLOW

GREEN

BLACK

E10

RED

U7A

NE5532P

U7B

NE5532P

-15V

C14

500pF

10.0k



R11

10k



C10

0.01uF



+15V

ICL7650SCPD

11 2

C11

0.1uF

C12

0.1uF

R12



C17

0.01uF

R13



-15V

C16

1.0nF

R14

10.0k



R17

243k



R15

243k



R16

910



R19

910



R18

1.5M



RV1



RV3

500



RV2

500



RV5

50k



RV6



R22

1.00k



R21

1.00k



RV7



RV4

50k



LF356N

+15V

RL3A

PRMA1A05
0.2A Range

RL2A

PRMA1A05
2A Range

R20

9.09k



10k



10k



2.4k



2.4k



200k



U5A

LM339N

U5B

LM339N

U5D

LM339N

10uF

C15

0.02uF

-15V

+15V

I_SCALED

IC REFERENCE DESIGNITER

POWER CONNECTIONS

+15V

-15V

COM

RL1A

PRMA1A05
20A Range

R10

20M



TP7

TP8

OLC

R23

9.09k



10k



C13

470uF

+15V

C39

0.01uF

Approved by:

Sheet

Revision:

Size:

2105-070

V. Sanfilippo

CLARK

DWG #.:

Valhalla Scientific, Inc
12127 Kirkham Road
Poway, CA 92064
(858) 457-5576

2105 Main Board

Current Amplifier

Section:

Summary of Contents for 2105AC

Page 1: ...Manual Model 2105 Wide Range Digital Power Analyzer VA L H A L L A S C I E N T I F I C Need Help Call 800 548 9806 www valhallascientific com 2015 Valhalla Scientific Inc All Rights Reserved Updated M...

Page 2: ...is instrument is stated on your invoice and packing list Please refer to these to determine appropriate warranty dates We will repair the instrument during the warranty period provided it is returned...

Page 3: ...r international symbols dealing with potential damage to equipment When present it indicates that there is a potential danger of equipment damage software program failure or that a loss of data may oc...

Page 4: ...perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this prod...

Page 5: ...on 10 2 4 Bench Use 10 2 5 Rack Mounting 11 2 6 Safety Precautions 11 Chapter 3 Specifications 12 3 1 Range and Resolution Table 12 3 2 Accuracies 12 3 3 Operating Specifications 13 3 4 Environmental...

Page 6: ...ections 17 5 4 1 Using Option X 21 18 5 4 2 Using CT s and PT s 18 5 4 2 1 Current Transformers 18 5 4 2 2 Potential Transformers 19 5 4 2 3 Using Both CT s and PT s 20 5 5 Manipulating the Data 21 5...

Page 7: ...ro and Offset Adjustments 26 6 3 12 Full Scale Watts Adjustments 26 6 3 13 AC Adjustments and Checks 27 Chapter 7 Theory of Operations 28 7 1 Troubleshooting 28 7 1 1 Component Replacement 28 7 1 2 Fi...

Page 8: ...oint Positioning 35 7 3 7 Analog Multiplier 35 7 3 8 Range Selection 35 Chapter 8 Addendums 36 Chapter 9 Parts List 37 Main Board Assembly 38 Display Board Assembly 43 Switch Board Assembly 44 Chassis...

Page 9: ...utine Maintenance Chapter 6 contains maintenance information such as calibration procedure Chapter 7 Theory of Operation Chapter 7 describes the theory of operation of all circuits and sub circuits us...

Page 10: ...returned to the factory Even if the instrument appears undamaged it may have suffered internal damage in transit that may not be evident until the unit is operated or tested to verify conformance with...

Page 11: ...and it is not possible to alter its location it is recommended that an aluminum reflector plate be used between this unit and the 2105 Under no circumstances should the ambient air temperature surrou...

Page 12: ...kHz 0 1 of reading 6 digits 5 kHz 10 kHz 0 5 of reading 0 5 of range 10 kHz 20 kHz 1 of reading 1 of range Useable above 20 kHz to 50 kHz with typically an additional 1 error per 10 kHz Current AC DC...

Page 13: ...nt Impedance 0 01 Max Common Mode 1500V peak neutral to earth Peak Indicators Illuminate at 2 5 x full scale for voltage and current Over range 150 of full scale for DC up to maximum input specificati...

Page 14: ...uctors Option I 1000 Current Transformer This clamp on type current transformer extends the AC current measurement capability on the 2105 to 1000 amps RMS The 1000 1 output ratio is 2 accurate from 50...

Page 15: ...ghest resolution without exceeding the value of the range If the amount of current is unknown select the highest current range before applying power to the load If the amount of current can be approxi...

Page 16: ...and display In either case select a higher range or reduce the input signals If the highest range has been selected and a peak O L indicator is still on the measurement may require the use of external...

Page 17: ...or test engineer to design custom harnesses according to the application The basic guidelines for making connections are 1 The supply voltage is connected between the L and N terminals line and neutr...

Page 18: ...the CT and reconnected Clamp on CT s are easier to use because they are just clamped around the conductor The conductor need not be disconnected when using a clamp on CT CT s are also used for isolati...

Page 19: ...ce lethal voltages which can damage the operator and or the power analyzer Figure 5 3 illustrates the basic method of connecting a CT to a digital power analyzer Figure 5 3 2105 Connections using a CT...

Page 20: ...e PT should be selected 1 times the expected voltage level to allow for high crest factor waveforms The ratio accuracy of PT s is usually about 2 This is quite a bit wider than the accuracy of a digit...

Page 21: ...VA Watts VAR PF and can best be described in a graphical manner Figure 5 6 illustrates these relationships VA is calculated by multiplying the true RMS voltage and true RMS current measurements of th...

Page 22: ...ther the voltage waveform is leading or lagging the current An oscilloscope must be used to determine leading or lagging Fortunately most every load has a lagging power factor If the load has a transf...

Page 23: ...in a mild soap and water solution Do not use abrasive cleaners The front panel may be cleaned with a soft cloth and a Windex type cleaner Do not use petroleum based cleaners on the front panel If requ...

Page 24: ...t and allow approximately 30 minutes for stabilization Note that the instrument may also be returned to the factory for full calibration traceable to NIST 6 3 1 Equipment Required Qty 1 Multi Calibrat...

Page 25: ...range Apply 30V and adjust RV9 for 5VDC on the DVM 2 Select the 150V range Apply 150V and adjust RV10 for 5 0000 VDC on the DVM 3 Select the 300V range Apply 300V and adjust RV11 for 5 0000 VDC on the...

Page 26: ...00 at both polarities 6 3 10 0 2A Range Adjustments 1 Fluke to 100mA Operate 2105 to 2A range 2 Reversing input polarity repeatedly adjust RV4 for an equal reading at both input polarities 3 Adjust RV...

Page 27: ...y 2 digits 2105 to the 2A range Check for 1 000 display 3 digits 5 Reduce current source to 0 1A Check display for 100 3 digits 2105 to 2A range Check for 1000 8 digits Increase range to 2A and input...

Page 28: ...order Use only 63 37 rosin core electronic grade solder with a 50W or lower maximum power soldering iron Many of the semiconductor devices used in the 2105 can be damaged by static discharges Thus th...

Page 29: ...lt output at the selected range The gains of the three stages of the current amplifier are 25 10 and 10 respectively The outputs of each current amplifier stage are individually selected by the curren...

Page 30: ...for the amps volts display Figure 7 1 2105 Block Diagram 7 3 Detailed Circuit Descriptions To supplement the overview provided by the preceding functional description this section describes the opera...

Page 31: ...nals However when taken apart for service personnel should verify that the neutral terminal is at the same potential as the power line ground or serious injury could occur 7 3 2 Voltage Amplifier and...

Page 32: ...ecially in the lowest current range The current signal amplifiers are shown in the schematic 2105 070 sheet 2 A simplified diagram of the input current amplifier is shown in Figure 7 3 The minimal ful...

Page 33: ...RMS DC converter U11 when Amps is selected with the V I keypad A 200mV input from U7 1 produces 5 volts at the output of U7 7 and 2mV produces 5 volts at the output of U8 6 The full scale voltage appl...

Page 34: ...U10 11 is at ground potential its output will be high back biasing voltage peak indicator D2 and holding it out of conduction When the input voltage either peak or steady state exceeds 12 volts the o...

Page 35: ...play driver transistors Q6 Q10 7 3 6 Decimal Point Positioning Schematic 2105 070 sheet 8 The decimal points for both displays are selected by U17 7 3 7 Analog Multiplier Schematic 2105 070 sheet 5 An...

Page 36: ...ms Immediately following this page may be found any notices regarding manual changes or operating considerations for special 2105 Please refer to any applicable material before attempting to operate y...

Page 37: ...Chapter 9 Parts List Main Board Assembly 2105 600F Display Board Assembly 2105 601F Switch Board Assembly 2105 602G Chassis Assembly 2105 499 37...

Page 38: ...25V TANTALUM CAPACITOR AVX TAP106K025SP C19 1 02 20012 10pF MICA CAPACITOR CM05CD100J03 C20 1 02 10004 0 02uF 500V CERAMIC CAPACITOR 21FA020 C21 1 02 60002 0 1uF 250V MYLAR CAPACITOR 104MSR250K C22 1...

Page 39: ...SISTOR 2N4401 Q05 1 03 10013 SMALL SIGNAL NPN TRANSISTOR 2N4401 Q06 1 03 10013 SMALL SIGNAL NPN TRANSISTOR 2N4401 Q07 1 03 10013 SMALL SIGNAL NPN TRANSISTOR 2N4401 Q08 1 03 10013 SMALL SIGNAL NPN TRAN...

Page 40: ...2 4K 5 1 4W CARBON FILM R31 1 01 10149 5 36K 1 50PPM C 1 4W M F R32 1 01 10042 5 62K 1 50PPM C 1 4W M F R33 1 01 10091 80 6 1 50PPM C 1 4W M F R34 1 01 01093 470K 5 1 4W CARBON FILM R35 1 01 10085 249...

Page 41: ...28 50K TOP ADJUST 68WR50K RV05 1 01 50028 50K TOP ADJUST 68WR50K RV06 1 01 50033 50 TOP ADJUST 68WR50 RV07 1 01 50033 50 TOP ADJUST 68WR50 RV08 1 01 50028 50K TOP ADJUST 68WR50K RV10 1 01 50013 1K TOP...

Page 42: ...UAL LOW NOISE HIGH SPEED OPAMP NE5532N U08 1 03 30090 JFET INPUT OPAMP LF356N U09 1 03 30090 JFET INPUT OPAMP LF356N U10 1 03 30133 QUAD DIFFERENTIAL COMPARATOR LM339N U11 1 03 30045 TRUE RMS TO DC CO...

Page 43: ...IGH DENSITY SUPER DIGIT 8 SR43 13SRWA DSP3 1 05 01010 HIGH DENSITY SUPER DIGIT 8 SR43 13SRWA DSP4 1 05 01010 HIGH DENSITY SUPER DIGIT 8 SR43 13SRWA DSP5 1 05 01020 1 HIGH INTENCITY LED 5082 7656 DSP6...

Page 44: ...01 40009 8 X 220 Network Resistor SW1 1 05 03134 TACTSWITCH TH SP MOEN RED LED 3FTL80 SW2 1 05 03134 TACTSWITCH TH SP MOEN RED LED 3FTL80 SW3 1 05 03134 TACTSWITCH TH SP MOEN RED LED 3FTL80 SW4 1 05 0...

Page 45: ...1 04 11103A 2105 REAR PANEL DWG 2105 202 n a 1 04 20083 2110 POWER TRANSFORMER DWG 2110 010 n a 1 05 03007 TOGGLE SWITCH C K 7101SYZQE n a 1 05 03017 SLIDE SWITCH SW 46256LFR n a 1 05 10018 FUSEHOLDER...

Page 46: ...RMS to DC Converter Main Board 2105 070 Rev F pg 4 8 Analog Multiplier Main Board 2105 070 Rev F pg 5 8 A D Converters and Display Drivers Main Board 2105 070 Rev F pg 6 8 Keypad Interface and Relay D...

Page 47: ...TP_GND U1 LM7805CT LINE VREG COMMON VOLTAGE U2 LM7905CT LINE VREG COMMON VOLTAGE U4 LM7915CT LINE VREG COMMON VOLTAGE U3 LM7815CT LINE VREG COMMON VOLTAGE C1 470uF 63V C7 470uF 63V C5 470uF 63V C3 470...

Page 48: ...50 R22 1 00k R21 1 00k RV7 50 RV4 50k U8 LF356N 3 2 6 5 1 15V RL3A PRMA1A05 0 2A Range RL2A PRMA1A05 2A Range R20 9 09k R3 10k R7 10k R1 2 4k R8 2 4k R2 200k U5A LM339N 5 4 2 U5B LM339N 7 6 1 U5D LM3...

Page 49: ...V 15V E11 RED RV11 500 RV8 50k RV9 5k RV10 1k RV12 200 R27 73 2k R29 10 2k R31 5 36k R32 5 62k R33 80 6 RL4A S4EB 5V 30V Range U9 LF356N 3 2 6 5 1 15V C19 10pF RL5A S4EB 5V 150V Range RL6A S4EB 5V 300...

Page 50: ...40 806 R41 845 RL7B S4EB 5V 600V Range RL6B S4EB 5V 300V Range RL5B S4EB 5V 150V Range RL4B S4EB 5V 30V Range 15V 15V 15V 15V DC_V_or_I C37 10uF C38 4 7uF 15V R34 470k TP1 TP2 U11 AD536AJH RL 1 COM 2...

Page 51: ...D I_SCALED 15V R47 249 R44 1 27k R45 475 W_SCALED RL4C S4EB 5V 30V Range RL5C S4EB 5V 150V Range RL6C S4EB 5V 300V Range RL7C S4EB 5V 600V Range RV19 50 RV20 100 RV21 100 R42 78 7k RV18 100 R46 237 TP...

Page 52: ...7135CPI VEE 1 VREF 2 AGND 3 INT OUT 4 AZ IN 5 BUF OUT 6 RC1 7 RC2 8 IN HI 10 IN LO 9 VCC 11 D5 12 D4 17 D3 18 D2 19 D1 20 B8 16 B4 15 B2 14 B1 13 CLK 22 DGND 24 R H 25 STROBE 26 OR 27 POL 23 BUSY 21 U...

Page 53: ...15 1N4148 RL8E D16 1N4148 GND 30V 150V 300V 600V 100mA 1A 10A V_I GND Q11 VN10LP Q12 VN10LP Q13 VN10LP Q14 VN10LP Q15 VN10LP Q16 VN10LP Q17 VN10LP Q18 VN10LP 600V 300V 150V 30V 100m 1A 10A V I RN3 L10...

Page 54: ...6 1 PD0 2 PD1 3 PD2 4 PD3 5 PD4 6 VCC 7 GND 8 22 PB6 9 PB7 10 PD5 11 PD6 12 PD7 13 PB0 14 PB1 15 PB2 16 PB3 17 PB4 18 PB5 19 AVCC 20 PC7 21 PC0 23 PC1 24 PC2 25 PC3 26 PC4 27 PC5 28 VCC 5V GND VILED D...

Page 55: ...A B E C D A B E K A DP DP 4 1 11 10 5 14 13 6 2 7 9 8 DSP7 SR43 13SRWA A B C D E F G CA DP 8 7 2 11 1 13 10 3 14 6 DSP8 SR43 13SRWA A B C D E F G CA DP 8 7 2 11 1 13 10 3 14 6 DSP9 SR43 13SRWA A B C D...

Page 56: ...nge SW3A 20A Range GND Designed by Approved by Sheet of Revision Size 2105 072 V Sanfilippo CLARK 1 1 H B DWG Valhalla Scientific Inc 12127 Kirkham Road Poway CA 92064 858 457 5576 Valhalla Model 2105...

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