1. DL manuals
  2. OHAUS
  3. Scales
  4. Valor 3000
  5. Service Manual

OHAUS Valor 3000 Service Manual - Service Manual

Manual is about: Ohaus Valor 3000 Series Scales Instruction Manual

Summary of Valor 3000

  • Page 1

    Service manual valor valor valor valor ™ 3000 scales ohaus corporation 19a chapin road, p.O. Box 2033, pine brook, nj 07058-2033 (973) 377-9000

  • Page 3: Service Manual

    Service manual valor valor valor valor ™ 3000 scales the information contained in this manual is believed to be accurate at the time of publication, but ohaus corporation assumes no liability arising from the use or misuse of this material. Reproduction of this material is strictly prohibited. Mater...

  • Page 5

    Table of contents ohaus corporation www.Ohaus.Com i valor™ 3000 series service manual page no. Chapter 1 getting started 1.1 introduction ............................................................................................................. 1-1 1.2 service facilities ............................

  • Page 6

    Table of contents valor™ 3000 series service manual ii ohaus corporation www.Ohaus.Com appendix a standard calibration page no. A.1 calibration............................................................................................................... A-1 appendix b the service menu b.1 entering ...

  • Page 7

    Table of contents ohaus corporation www.Ohaus.Com iii valor™ 3000 series service manual table no. Title page no. 5-1 valor 3000 xtreme scales: housing & internal parts .......................................... 5-2 5-2 valor 3000 xtreme w scales: housing & internal parts................................

  • Page 8

    Table of contents valor™ 3000 series service manual iv ohaus corporation www.Ohaus.Com.

  • Page 9

    Chapter 1 getting started 1.1 introduction this service manual contains the information needed to perform routine maintenance and service on the ohaus valor 3000 series scales. Familiarity with the scale’s instruction manual is assumed. The contents of this manual are contained in five chapters: cha...

  • Page 10

    Chapter 1 getting started 1.3 tools and test equipment required 1. Common hand tools are sufficient to disassemble the valor 3000 scales. 2. Rs2323 interface connector – pn 71147376 or 72206287 3. Communications service interface – pn 72203450 1.4 specifications complete specifications for the ohaus...

  • Page 11

    Chapter 1 getting started 1.4 specifications table 1-2. Capacity and readability non-washable models washable models units v31xh202 v31xh2 v31x3 v31x6 lft switch v31xw301 v31xw3/ v31x3n v31xw6/ v31x6n na na na na on 300.0 x 0.2 3000 x 1 6000 x 2 g 200.00 x 0.01 2000.0 x 0.1 3000 x 1 6000 x 1 off 300...

  • Page 12

    Chapter 1 getting started 1.5 scale operation this section contains information on the basic operation of the scale. The included ac adapter may be used to power the scale when battery power is not available. Remove the rubber seal in the bottom. Store it in the location provided. (see figure 1-1. C...

  • Page 13

    Chapter 1 getting started 1.5.2 overview of the display indicators 3 1 2 figure 1-3. Valor 3000 display indicators. Table 1-4. Display indicators no . Function 1 indicates that the measured value has become stable. 2 standard 7-segment numeric characters, used for displaying weight values. Symbols f...

  • Page 14

    Chapter 1 getting started 1.6 legal for trade (lft) when the scale is set for lft (on xw and ntep models), the following menu settings cannot be accessed/changed: calibration, unit, stability, ast, filter, power on unit, and global reset. To regain access to the locked menu settings, remove the smal...

  • Page 15

    Chapter 1 getting started valor™ 3000 series service manual 1-7 ohaus corporation www.Ohaus.Com 1.7 menu structure programmable features of the valor 3000 are contained in menus which are accessed through the display panel’s control switches. The menu structure is illustrated below. (for more detail...

  • Page 16

    Chapter 1 getting started ohaus corporation www.Ohaus.Com 1-8 valor™ 3000 series service manual.

  • Page 17

    Chapter 2 diagnostic guide 2.1 troubleshooting this section of the manual contains troubleshooting information. Information is contained to isolate specific problems using table 2-1, diagnostic guide. Follow all directions step by step. Make certain that the work area is clean. Handle scale componen...

  • Page 18

    Chapter 2 diagnostic guide 2.2.1 diagnosis table 2-1. Diagnostic guide symptom possible cause remedy cannot turn on no power to scale verify connections and voltage. Poor accuracy improper calibration unstable environment perform calibration • move scale to suitable location cannot calibrate unstabl...

  • Page 19

    Chapter 3 maintenance procedures 3.1 preventive maintenance ohaus scales are precision instruments and should be carefully handled, stored in a clean, dry, dust-free area, and cleaned periodically. Follow these precautionary steps: – when a scale has had chemicals or liquids spilled on it, all exter...

  • Page 20

    Chapter 3 maintenance procedures 3.2.1 opening valor 3000 standard and washable models common hand tools are sufficient to disassemble the valor 3000 scales. Turn the scale off and unplug the power cord before you begin. 1. Remove the weighing pan: pry off the seal tab, remove the screw and washer s...

  • Page 21

    Chapter 3 maintenance procedures 3.3 replacing the load cell the load cell may need to be replaced because of scale instability, or because the scale does not calibrate or repeat, or because it is physically broken or displays an error code. 1. Open the scale – see section 3.2.1. 2. Disconnect the c...

  • Page 22

    Chapter 3 maintenance procedures screws holding pcb in place 3.4 replacing the printed circuit board and display 1. Open the scale – see section 3.2.1. 1. Disconnect the cable from the pcb to the load cell. Follow the procedure in section 3.3. 2. Remove the four screws that hold the pcb in place. Fi...

  • Page 23

    Chapter 3 maintenance procedures 3.5 replacing the housing seals 1. Open scale following instructions in section 3.2.1. Note the condition of the load cell seal and ring, which may also need to be replaced. 2. Remove the leveling feet and the two screws that secure the legal-for-trade (lft) switch c...

  • Page 24

    Chapter 3 maintenance procedures 3.6 replacing the function label the function label may need to be replaced. (see chapter 5 for parts information.) use a broad blade, such as a wide x-acto knife, to remove the label. Clean the glue residue from the housing surface. Then carefully place the new labe...

  • Page 25

    Chapter 4 testing 4.1 testing before and after servicing a valor 3000 scale, an operational test and various performance tests should be made to confirm that the scale meets specifications. Turn the scale on and allow it to warm up for at least one hour before performing these tests. Note: make sure...

  • Page 26

    Chapter 4 testing 4.5 performance tests accurate performance of the valor 3000 scales is determined by a series of four performance tests. The displayed readings are compared with the tolerances listed in tables 4-2 and 4-3. Tolerance values are expressed in counts. A one-count difference is shown i...

  • Page 27

    Chapter 4 testing 4.5.2 repeatability test repeatability is the standard deviation of a set of similar weight readings. Requirements: – to perform this test a single mass must be used for all readings. – the test mass should be approximately ½ of the capacity of the instrument. – wear gloves when ha...

  • Page 28

    Chapter 4 testing 4.5.2 repeatability test table 4-3. Repeatability worksheet n reading delta = reading – mean delta x delta 1 2 3 4 5 6 7 8 9 10 n = number of reading mean = sum of readings / 10 delta = reading – mean standard deviation = square root of (sum of (delta x delta) / 9) 5. Add the ten r...

  • Page 29

    Chapter 4 testing 4.5.3 linearity test this test is used to determine the linearity of the unit throughout its operating range. The masses used to perform this test can be utility masses. Note: the scale must pass the precision and repeatability tests, and be calibrated before the linearity test may...

  • Page 30

    Chapter 4 testing 4.5.5 adjusting off center load if the off center load (ocl) is excessive, perform adjustment as follows: top view of load cell side view of load cell 2 3 weighing pan’s center, with points a – d indicated 1 4 figure 4-2. Scale drawing of valor 3000 load cell and weighing pan. 1. P...

  • Page 31

    Chapter 5 parts lists & diagrams this section of the manual contains exploded views for the valor 3000 series scales. The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field. Note: in all cases where a part is replaced, the scale must be thorough...

  • Page 32

    Chapter 5 parts lists & diagrams 5.1 valor 3000 xtreme scales: housing & internal parts 3 5 6 7 8 8 10 16 11 12 80 15 13 14 16 4 2b 1b 2a 8 1a 16 figure 5-1. Valor 3000 xtreme scales: housing & internal parts. Ohaus corporation www.Ohaus.Com 5-2 valor™ 3000 series service manual.

  • Page 33

    Chapter 5 parts lists & diagrams 5.1 valor 3000 xtreme scales: housing & internal parts table 5-1. Valor 3000 xtreme scales: housing & internal parts drawing item description 1a pan, square, 146mm x 158mm 2a pan support square 1b pan, round, 120mm 2b pan support round 3 plastic insert non-ip 4 funct...

  • Page 34

    Chapter 5 parts lists & diagrams 5.2 valor 3000 xtreme w scales: housing & internal parts figure 5-5. Valor 3000 xtreme w scales: housing & internal parts. Ohaus corporation www.Ohaus.Com 5-4 valor™ 3000 series service manual.

  • Page 35

    Chapter 5 parts lists & diagrams 5.2 valor 3000 xtreme w scales: housing & internal parts table 5-5. Valor 3000 xtreme w scales: housing & internal parts drawing item description 1 pan, square, 146mm x 158mm 2 pan support square 3 load cell seal kit, ip models 4 function label, level 5 housing, top,...

  • Page 36

    Chapter 5 parts lists & diagrams ohaus corporation www.Ohaus.Com 5-6 valor™ 3000 series service manual.

  • Page 37

    Appendix a standard calibration appendix a. Standard calibration a.1 calibration note: this menu is locked out in legal for trade applications. To regain access, see section 1.6. Standard calibration should be performed prior to using a scale, and after service. See section 4.2 for calibration masse...

  • Page 38

    Appendix a standard calibration ohaus corporation www.Ohaus.Com a-2 valor™ 3000 series service manual.

  • Page 39

    Appendix b the service menu appendix b. The service menu this section describes the service menu and sub-menus, which allow authorized service personnel to perform factory linearity and span calibrations (no pre-set limits). B.1 entering the service menu turn the scale off. Enter the service menu by...

  • Page 40

    Appendix b the service menu b.3 linear calibration linear calibration automatically follows ramp. To start from the service menu, press and hold o/t/on/off and mode/unit/menu together. As the scale powers up, ramp appears. Press no to bypass ramp. When linear appears, press yes. Lin the display show...

  • Page 41

    Appendix b the service menu b.4 span calibration span calibration from the service menu allows you to set a new zero and maximum setting. This is distinct from user level span calibration, which allows a user to adjust the zero and maximum setting within the range established by the service menu spa...

  • Page 42

    Appendix b the service menu b.5 geographical adjustment factor (geo) the geo factor adjustment allows entry of values from 0 to 31 and is used to compensate for slight variations in gravity at different geographical locations around the world. This feature allows authorized personnel to accurately c...

  • Page 43

    Appendix b the service menu b.6 expanded readability (e.Pand) e.Pand sets the readability to 1/10 th of the standard readability. (that is, if standard readability is .01, with e.Pand on it would be .001.) normally e.Pand is off. Once it is set on, it will be on until the scale is switched off. When...

  • Page 44

    Appendix b the service menu ohaus corporation www.Ohaus.Com b-6 valor™ 3000 series service manual.

  • Page 45

    Appendix c software service tool instructions valor™ 3000 series service manual c-1 ohaus corporation www.Ohaus.Com appendix c. Software service tool instructions the software service tool (part number 80252509) is required when either a main pc board or a load cell is replaced in a valor 3000 scale...

  • Page 46

    Appendix c software service tool instructions ohaus corporation www.Ohaus.Com c-2 valor™ 3000 series service manual c.1 hardware and software setup continued 6. Open configtool.Exe and click check scale. Figure c-3. First screen of configtool.Exe. 7. Click com port for communication setup. Figure c-...

  • Page 47

    Appendix c software service tool instructions valor™ 3000 series service manual c-3 ohaus corporation www.Ohaus.Com c.1 hardware and software setup continued 9. Click the test command tab to test the communications. (see figure c-4.) figure c-5. Config tool’s test command screen. – enter a “p” comma...

  • Page 48

    Appendix c software service tool instructions ohaus corporation www.Ohaus.Com c-4 valor™ 3000 series service manual c.2 configuring the scale (after replacing the pcb or load cell) 1. When communications are reliable, return to the config tab. Press the read button (e) and the data will be read from...

  • Page 49

    Appendix d geographical adjustment values appendix d. Geographical adjustment values table d-1. Geographical adjustment values. Elevation above sea level in meters 00 0 325 325 650 650 975 0 975 1300 1300 1625 1625 1950 1950 2275 2275 2600 2600 2925 2925 3250 3250 3575 elevation above sea level in f...

  • Page 50

    Appendix d geographical adjustment values table d-1. Geographical adjustment values. Elevation above sea level in meters 00 0 325 325 650 650 975 0 975 1300 1300 1625 1625 1950 1950 2275 2275 2600 2600 2925 2925 3250 3250 3575 elevation above sea level in feet geographical latitude away from the equ...

  • Page 52

    *80252591* p/n 80152591 service manual: valor 3000 series scales.