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Valhalla 2105AC Operation Manual

Wide-range digital power analyzer
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Model 2105
Wide-Range Digital Power Analyzer
Operation Manual
Updated March 2015
Need Help? Call 800-548-9806.
VA L H A L L A
www.valhallascientific.com
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©2015 Valhalla Scientific, Inc. All Rights Reserved.

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  • Page 1 Model 2105 Wide-Range Digital Power Analyzer Operation Manual Updated March 2015 Need Help? Call 800-548-9806. VA L H A L L A www.valhallascientific.com ©2015 Valhalla Scientific, Inc. All Rights Reserved.
  • Page 2 The warranty period for this 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 to Valhalla Scientific, Inc. freight prepaid. No other warranty is expressed or implied.
  • Page 3 OCUMENTATION ISTORY All Editions and Updates of this manual and their creation date are listed below. The first Edition of the manual is 1. The Edition Number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to correct or add additional information to the current Edition of the manual.
  • Page 4 REMOVE POWER and do not use the product until safe operation can be verified by service- trained personnel. If necessary, return the product to Valhalla Scientific for service and repair to ensure that safety features are maintained.

  • Page 5: Table Of Contents

    Table of Contents Chapter 1 General Information ....................9 Introduction........................9 Manual Description ......................9 Instrument Identification ....................9 Chapter 2 Unpacking and Installing ..................10 Introduction........................10 Inspection ........................10 Line Voltage/Fuse Selection ................... 10 Bench Use ........................10 Rack Mounting .......................
  • Page 6 5.2.3 Current Range Keys ....................15 5.2.4 Voltage Range Keys ....................15 5.2.5 Peak Amp Overload Indicator ................. 15 5.2.6 Peak Volt Overload Indicator .................. 16 5.2.7 Amps-Volts Display ....................16 5.2.8 Watts – True Power Display ..................16 Rear Panel Controls ......................17 Making Connections .......................
  • Page 7 6.3.2 ADC Reference Adjustments ................... 24 6.3.3 Calibration Connections ..................25 6.3.4 Offset Adjustment ....................25 6.3.5 -5 Volt Reference Adjustments ................25 6.3.6 Display Adjustments ....................25 6.3.7 Linearity Adjustments ..................... 26 6.3.8 20A Range Adjustments ..................26 6.3.9 2A Range Adjustments ....................
  • Page 8 7.3.5.2 Watts Display....................... 35 7.3.6 Decimal Point 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 ......................

  • Page 9: Chapter 1 General Information

    Valhalla Model 2105. Instrument Identification Valhalla Scientific instruments are identified by a two part serial number. The Serial Tag is located on the rear or bottom of the instrument. The number is in a form of 00-0000. The first two digits, called the serial number prefix, indicate the model.

  • Page 10: Chapter 2 Unpacking And Installing

    If the unit fails to operate, notify the carrier's agent and the nearest Valhalla Sales Office. Retain the shipping carton for the carrier's inspection. DO NOT return equipment to Valhalla Scientific or any of its sales offices prior to obtaining authorization to do so.

  • Page 11: Rack Mounting

    Rack Mounting An optional kit is available for mounting the 2105 in a standard 19" equipment rack. This is listed in Section 4 of this manual. Follow the installation diagram included with the kit. If the 2105 is to be transported while mounted in a rack then it must be supported so as to prevent upward and downward movement.

  • Page 12: Chapter 3 Specifications

    Chapter 3 Specifications This section contains accuracy, operating and environmental specifications for the Model 2105. Range and Resolution Table Table 1 Current Ranges .2000A 2.000A 20.00A 30.00V 6.000W 60.00W 600.0W 150.00V 30.00W 300.0W 3000W 300.0V 60.00W 600.0W 6000W 600.0V 120.00W 1200.0W 12000W Watts Accuracies Specified accuracies are valid for a period of 1 year from the date of calibration at 25°...

  • Page 13: Operating Specifications

    Operating Specifications Crest Factor Response: 50:1 for minimum RMS input, linearly decreasing to 2.5:1 for full scale RMS input Minimum Inputs: 5% of voltage and current ranges for specified accuracies Maximum Voltage Input: 600VDC or RMS, ±1500V PEAK (Without damage) Maximum Current Input: ±35A , 20ADC or RMS continuous;...

  • Page 14: Chapter 4 Optional Equipment

    Chapter 4 Optional Equipment This section lists the options available for the 2105 Digital Power Analyzer. Standard accessories include a detachable power cord and an operation manual. Optional Accessories Option I-100: Current Transformer This "clamp-on" type current transformer extends the AC current measurement capability on the 2105 to 100 amps RMS.

  • Page 15: Chapter 5 Operations

    Chapter 5 Operations General This section of the manual contains complete operating instructions for the Model 2105 Digital Power Analyzers. Included are control functions, connection methods, and operational precautions. Front Panel Controls The functions of all front panel controls and indicators are described in the following paragraphs.

  • Page 16: Peak Volt Overload Indicator

    5.2.6 Peak Volt Overload Indicator This indicator may be used to alert the user to the presence of spikes on the input signal. If the peak or steady-state voltage applied to the load is greater than 250% of the range selected with the Voltage Range Key, the "Volts O/L"...

  • Page 17: Rear Panel Controls

    Rear Panel Controls The locations of the rear panel controls are shown in Figure 5-1. The function of the 115V/230V switch and power cord receptacle were covered in section 2-3. It is important to connect the load in accordance with the L (line) and N (neutral) indications on the rear panel for maximum safety and accuracy.

  • Page 18: Using Option X-21

    Figure 5-2 | 2105 Connections using the X-21 5.4.2 Using CT’s and PT’s Current and potential transformers (CT's and PT's) may be used with any Valhalla Digital Power Analyzer to increase its measurement range. Clamp-on CT's may also be used to simplify power analyzer connections.

  • Page 19: Potential Transformers

    Figure 5-3 | 2105 Connections using a CT Figure 5-4 | 215 Connections using a PT 5.4.2.2 Potential Transformers Potential transformers (PT's) are used to extend the voltage measurement capabilities of Valhalla digital power analyzers. PT's are available in many ratios, maximum voltage ratings and isolation voltages.

  • Page 20: Using Both Ct's And Pt's

    PT's can be used to isolate the digital power analyzer from high voltage systems. Some high voltage systems operate at voltage levels directly measurable by the power analyzer but at common-mode voltages beyond the power analyzer's limits. The isolation voltage rating should be at least 1 ½ times the common-mode voltage or peak input voltage.

  • Page 21: Manipulating The Data

    Manipulating the Data The 2105 directly measures the voltage, current and power used by a single-phase system. Volt-Amperes (VA), Reactive Volt-Amperes (VAR), power factor (PF), and phase angle (φ) are not displayed but can easily be calculated from the voltage, current and power measurements. The following paragraphs describe the methods for calculating VA, VAR, PF, and φ.

  • Page 22: Pf, Leading Or Lagging

    5.5.2 PF, Leading or Lagging? The terms leading and lagging power factor refer to the relative phase shift between the current and voltage waveforms. The current leads the voltage in a capacitive load while the current lags the voltage in an inductive load. When calculating power factor using a 2105, there is no way of determining whether the voltage waveform is leading or lagging the current.

  • Page 23: Chapter 6 Routine Maintenance

    If required, the 2105 interior may be cleaned by blowing with dry compressed air. If the 2105 has become heavily soiled with dirt or by other contaminants it is recommended that the unit be completely overhauled. Contact your local Valhalla Scientific Service Center for details.

  • Page 24: Calibration

    Calibration The following procedures should be performed at routine intervals to ensure that the Power Analyzer remains within specified limits. In addition, calibration should be performed following repairs involving accuracy determining components. Remove the top cover from the unit to gain access to the internal adjustments. The locations of the adjustments are listed on the circuit board and on drawing number 2105-600 at the back of this manual.

  • Page 25: Calibration Connections

    6.3.3 Calibration Connections Refer to Figure 6-1 if using the Fluke 5500. Figure 6-1 | DC Connections 6.3.4 Offset Adjustment 8. Set the 2105 to Volts and the 150V range. Set the Fluke to 10V operate. 9. Alternating polarity of the input voltage, adjust RV8 for an equal reading at both polarities.

  • Page 26: Linearity Adjustments

    6.3.7 Linearity Adjustments 1. Fluke to 10V operate, 2105 to 150V range. Adjust RV13 for a display reading of 10.00. 2. Reverse input polarity and adjust RV8 for balanced display. 3. Repeat until ±10V readings are balanced and reading exactly 10.00. 4.

  • Page 27: Ac Adjustments And Checks

    6.3.13 AC Adjustments and Checks Figure 6-2 | AC Connections 1. Select AMPS and the 20A, 600V ranges on the 2105. 2. Set the AC Calibrator for 600V, 10A, 100Hz, 180°, operate. 3. Adjust RV3 for 10.00 in the current display. Check Watts display for 6000 ±6 digits.

  • Page 28: Chapter 7 Theory Of Operations

    • Use only the specified component or its exact equivalent. Spare parts may be ordered from your nearest Valhalla Scientific Service Center by referring to the Valhalla part number listed in the Parts List section at the back of this manual. Please provide the type and serial number of the instrument with your order.

  • Page 29: Finding The Faulty Component

    7.1.2 Finding the Faulty Component WARNING HAZARDOUS VOLTAGES MAY BE PRESENT INSIDE THE 2105 Experience has shown that apparent malfunctions are often the result of misinterpretation of the specifications or operating procedures of the unit. Check to be sure that the cables and other test equipment are in good order before attempting to repair the 2105.

  • Page 30: Detailed Circuit Descriptions

    The output of the voltage amplifier and the output of the current amplifier stage are applied to individual inputs of the power converter. The output of the power converter is passed through a scaler controlled by the voltage range relays. Again, scaling is necessary since the full-scale output of the voltage amplifier is the same on all ranges.

  • Page 31: Power Supply

    7.3.1 Power Supply Schematic 2105-070 sheet 1. S1 is the front panel toggle switch that connects one side of the power line to one end of the primary windings of transformer T1. The other end of the primary windings is permanently connected to the other side of the line.

  • Page 32: Current Amplifiers And Scaling

    The switches connected to the arms of the potentiometers in this voltage divider are other sections of the range relays that close simultaneously with those in the feedback circuit of U9. The output of U11 is scaled down through the divider to 0.6 volts for the 600 volt range, 0.3 volts for the 30 and 300 volt range and 1.5 volts for the 150 volt range, with the potentiometers RV15 through RV17 providing the line calibration adjustments.
  • Page 33 U7-1 has a gain of 25 and the amplifiers that follow, U7-7 and U8-6, have a constant gain of 10 when properly adjusted with RV6 and RV7. The output of U7-1, U7-7 and U8-6 are each connected to one contact of the "Current" switch. The other contact is connected to its counterparts so that the selected output is applied to the true RMS-DC converter, U11, when "Amps"...

  • Page 34: Peak Detector/Indicators

    7.3.4 Peak Detector/Indicators Schematic 2105-070 sheet 2 & 3. When the voltage applied to the rear panel terminals exceeds 250% of the selected voltage range, the peak voltage indicator illuminates. This signals that the displayed voltage and power value may not be accurate and that spikes may be present on the input signal. An identical circuit provides a visual signal when the current to the load exceeds 250% of the selected current range.

  • Page 35: Watts Display

    is applied to U14 a BCD to 7 Segment Converter/Driver and to the display driver transistors Q1- 7.3.5.2 Watts Display The Analog to Digital conversion in the Model 2105 is allowed by U15 and its associated components. The reference voltage applied to U15-2 is 1Volts. 1.2Volts are generated by D11 and adjusted by RV23.

  • Page 36: Chapter 8 Addendums

    Chapter 8 Addendums 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 your Model 2105.

  • Page 37: Chapter 9 Parts List

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

  • Page 38: Main Board Assembly

    Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-600F 2105-070F 2105-700F Description: 2105 Main Board Assembly Description Main Board Assemb ly 04-30333 2105 MAIN PCB REV F DWG 2105-700 Rev F 02-40052 470uF/63VALUMINUM CAPACITOR RADIAL ILL 477RSM063M 02-30001 10uF/25V TANTALUM CAPACITOR AVX TAP106K025SP...
  • Page 39 Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-600F 2105-070F 2105-700F Description: 2105 Main Board Assembly Description 03-20002 RECTIFIER DIODE 2N4001 03-20002 RECTIFIER DIODE 2N4001 03-20033 LOW VOLTAGE REFERENCE 1.2V LM285LP-1.2 03-20000 GENERAL PURPOSE DIODE 2N4148 03-20033 LOW VOLTAGE REFERENCE 1.2V LM285LP-1.2...
  • Page 40 Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-600F 2105-070F 2105-700F Description: 2105 Main Board Assembly Description 01-01061 10K 5% 1/4W CARBON FILM 01-01041 1K 5% 1/4W CARBON FILM 01-01041 1K 5% 1/4W CARBON FILM 01-10008 10K 1% 50PPM/C 1/4W M.F.
  • Page 41 Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-600F 2105-070F 2105-700F Description: 2105 Main Board Assembly Description 01-01081 100K 5% 1/4W CARBON FILM 01-01061 10K 5% 1/4W CARBON FILM 01-01073 47K 5% 1/4W CARBON FILM 01-01073 47K 5% 1/4W CARBON FILM 01-01053 4.7K 5% 1/4W CARBON FILM...
  • Page 42 Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-600F 2105-070F 2105-700F Description: 2105 Main Board Assembly Description 03-30036 +15 VOLT REGULATOR POSITIVE L78M15CV 03-30037 -15 VOLT REGULATOR NEGITIVE 79M15C 03-30133 QUAD DIFFERENTIAL COMPARATOR LM339N 03-30111 STABILIZED OPAMP ICL7650SCPD 03-30134 DUAL LOW-NOISE HIGH SPEED OPAMP...

  • Page 43: Display Board Assembly

    Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-601F 2105-071F 2105-701F Description: 2105 Display Board Assembly Description 04-30334 2105 Display PCB Rev F DWG 2105-701 Rev F 05-01005 Small Red LED MV5074C 05-01005 Small Red LED MV5074C 05-01005 Small Red LED...

  • Page 44: Switch Board Assembly

    Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-602G 2105-072H 2105-702G Description: 2105 Switch Board Assembly Description 04-30335 2105 Switch PCB Rev G DWG 2105-702 Rev G 02-10006 0.01µF/50V Ceramic Cap 01-40015 9 X 10K Network Resistor L10-1C-103 01-40009 8 X 220 Network Resistor...

  • Page 45: Chassis Assembly

    Model 2105 Parts List Assembly No.: Schematic DWG No.: PCB DWG No.: 2105-400 Description: 2105 Chassis Assembly Description 01-10089 600K 1% 80PPM/C 1W M.F. MG714-600K-1% 01-20256 0.015 OR 0.012 CURNT SENSE R PBV-R012-1.0 04-10130 CHASSIS PAC-TEC 04-10283 HEATSINK SHUNT DWG 2105-203 Rev.A 04-10285 SHORTING STRAP DWG 2105-207...

  • Page 46: Chapter 10 Schematics

    Chapter 10 Schematics Power Supply (Main Board) ....... 2105-070 Rev. F pg.1/8 Current Amplifier (Main Board) ....2105-070 Rev. F pg.2/8 Voltage Scaler (Main Board) ..... 2105-070 Rev. F pg.3/8 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) .
  • Page 47 LM7905CT YELLOW +15V LM7815CT 1N4001 LINE VREG VOLTAGE COMMON 10uF 470uF/63V TP_GND YELLOW GRN/YLW Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 470uF/63V 10uF (858) 457-5576 COMMON 2105 Main Board VOLTAGE LINE VREG Section: Power Supply LM7915CT DWG #.:...
  • Page 48 10.0k +15V   +15V NE5532P  NE5532P     243k 1.5M 0.01uF Valhalla Scientific, Inc 12127 Kirkham Road  9.09k Poway, CA 92064  -15V LF356N (858) 457-5576 2105 Main Board  1.00k Section: Current Amplifier ...
  • Page 49  2.4k  10.2k RL6A -15V RV11  S4EB-5V 300V Range  5.36k RL7A RV12 Valhalla Scientific, Inc  12127 Kirkham Road S4EB-5V Poway, CA 92064 600V Range (858) 457-5576 2105 Main Board   5.62k 80.6 Section: Voltage Scaler DWG #.:...
  • Page 50   S4EB-5V 470k RV17 30V Range   RL6B -15V  S4EB-5V 300V Range Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 2105 Main Board Section: RMS-to-DC Converter DWG #.: 2105-070 Sheet Revision: Size: Designed by: V.
  • Page 51  AD734AN S4EB-5V  30V Range RL5C RV21 0.1uF  S4EB-5V 150V Range -15V  Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 2105 Main Board Section: Analog Multiplier DWG #.: 2105-070 Sheet Revision: Size: Designed by: V.
  • Page 52 W_SCALED  ICL7135CPI CLK 22  10uF 4.7k 2N4402 DGND 24 IN LO Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 POWER CONNECTIONS 2105 Main Board IC REFERENCE DESIGNITER Section: A/D Converters Display Drivers U14 - U16 DWG #.:...
  • Page 53 VN10LP VN10LP VN10LP 150V 300V 600V 100mA 600V 300V 150V 100m HDR1X10 Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 2105 Main Board Section: Keypad Interface and Relay Drivers DWG #.: 2105-070 Sheet Revision: Size: Designed by: V.
  • Page 54 PB0 14 PB1 15 PB2 16 VILED PB3 17 PB4 18 PB5 19 PB6 9 PB7 10 ATTINY88-PU Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 2105 Main Board Section: DP Driver DWG #.: 2105-070 Sheet Revision:...
  • Page 55 A B C D E F G WDP3 WDP2 WDP1    +15V 5.1k WP1503_5mm Voltage Current  5.1k Valhalla Scientific, Inc WP1503_5mm 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 2105 Display Board Section: DWG #.: 2105-071 Sheet Revision: Size: Designed by: V. Sanfilippo...
  • Page 56 600V LED PB6 9 PB7 10 SW3A 20A Range ATTINY88-PU SW2A 2A Range SW1A 200mA Range L101C103   Valhalla Scientific, Inc 12127 Kirkham Road Poway, CA 92064 (858) 457-5576 Valhalla Model 2105 Section: Switch Board DWG #.: 2105-072 Sheet...

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