iFixit - Answers With Device "Laboratory Equipment"

Biotek ELx800 Series: ELx800 absorbances directly from the instrument

Sun, 27 Jul 2025 19:54:05 -0700

About biotek ELx800 I only want to read absorbances directly from the instrument via a printer what are the instructions

⟐ Answered July 27, 2025 at 19:54 MST

Siemens Chemistry Analyzer: Why it does not give wbc reading

Mon, 24 Feb 2025 08:13:52 -0700

Why it does not give wbc reading

Mindray BS-200: I want to clean the wavelength

Sun, 21 Jul 2024 03:08:36 -0700

How to clean the wavelength please advice .

Microscope: How do you guys clean your microscope lenses?

Tue, 17 Nov 2020 18:23:18 -0700

Hello. First,thanks for any help!

I got an AmScope SE400-Z. It’s supposed to be an awesome microscope for soldering!

But here’s the problem... I tried 2 of those scopes, and both lenses in both scopes have quite a bit of dust and the second was terrible in the right lens. It’s the eyepiece, but on the rear side, not the side you press your eyes up against.

I tried cleaning them with a brand new microfiber cloth, it just made it worse and super dusty and left marks. I tried Q-Tips as I heard 100% cotton Q-Tips with rubbing alcohol are good. I tried that, rubbing it in a circular motion, but it just made it worse.

I can’t seem to find a way to remove the dust. I also bought canned air,and it just won’t work!

What am I doing wrong? What if I was to switch to 20x lenses for something, and dust got on the 10x when I take them out? It’s not as bad now since I found the 2 lenses with the least dust, but I’m baffled.

Will lens paper or kimwipes really work much better? Because even the micro cloth sucked!!! And yes,it’s the kind for glasses and tv screens.

Thanks for any help!

⟐ Answered November 17, 2020 at 18:23 MST

Nikon Labophot: How do you take a part coarse fine adjustment's Nikon lab 1

Tue, 30 Dec 2025 21:48:43 -0700

How do you take apart fine coarse adjustment

⟐ Answer edited December 30, 2025 at 21:48 MST

Thermal Cycler: Support of Bio-Rad S1000 PCR

Mon, 22 Jul 2024 01:13:12 -0700

The S/n under 10,000 is no longer supported can you guys work on these?

⟐ Commented July 22, 2024 at 1:13 MST

Spectrometer: Procedure to replace electrode sharpener's holder of Spectroil q120's

Fri, 05 Jul 2024 14:41:46 -0700

How to replace graphite electrode sharpener's blade holder of Spectroil q120' graphite electrode sharpener

⟐ Edited July 05, 2024 at 14:41 MST

Microscope: Best type of scope for microsoldering

Tue, 05 Sep 2023 05:45:21 -0700

I have recently purchased a laser machine for back glass removals, and

i’m looking at the next lot of kit to save up for and purchase. I want to setup for microsoldering. So will need a decent microscope which i can both hook up to a monitor/laptop and be able to look down. Have seen AmScope crop up quite a bit, but want to get an idea from what regular users have experience with.

Will also want to know the compatible cameras/led rings that go with what ever is reccomended.

Thanks

⟐ Answered September 05, 2023 at 5:45 MST

Thermo Fisher Centrifuge: Sorvall ST 16 Centrifuge - Temperature sensor mechanism?

Sun, 14 May 2023 17:48:06 -0700

We have a centrifuge set at room temperature but after a 5 minute spin, samples are cold and frost can be seen within the chamber. Does anyone know how to diagnose and fix this situation?

⟐ Answer accepted May 14, 2023 at 17:48 MST

pH Meter: Circuit Repair - 44 pin Microcontroller Expected Heat Output?

Wed, 01 Jun 2022 12:28:11 -0700

I am working on a Bluelab Guardian a TDS and PH monitor for aquariums and hydroponics. Total device power is 5v 1 amp. I suspect the previous owner hooked it to the wrong power supply and fried it. No response when supplying the correct 5v 1a

No visible damage on the PCB to make things easy. Many parts of the circuit have active voltage when plugged in which gives me hope it's not a total loss.

While checking the board with power supplied I noticed that the main 44 pin Microcontroller was getting quite hot - measured as high as 170F which seems high to me for such a basic chip.

This chip's model number is "PIC18F2423" - and trying to search through the documentation I couldn't seem to find anything about expected operation temperature so was hoping someone with general knowledge of basic chips like this would have an idea if that level of heat output might be an indication that it's fried. Any thoughts?

Since it stores the programming, if it's dead then there's nothing else I'd be able to do with this circuit so this seemed a reasonable place to start.

While investigating the circuit I did find a DC to DC converter which seems to be dead - has 5v coming in and no output. It's a 4 pin model with no "enable" pin so I believe I should have voltage out. I can definitely replace it just don't want to start swapping components throwing good money after bad if there's a chance the main microchip is fried.

Any advice or suggestions appreciated. Photos of the circuit attached.

⟐ Commented June 01, 2022 at 12:28 MST

Hettich Centrifuge: Searching for the operator and/or service manual for a Rotina 38R.

Wed, 17 Jun 2020 14:08:46 -0700

I have been searching for the manuals for a Rotina 38R, which has been discontinued for some time. Does anyone have a line on these? The Rotina 380R is probably close, but CMS regulations demand make and model specific PM instructions.

⟐ Commented June 17, 2020 at 14:08 MST

Acutemp Hemacool HMC-MIL-1: Why cant I use the key pad to type in serial number?

Tue, 31 Mar 2026 22:31:12 -0700

I had to wire a new battery harness and replace the fuses and the cord and finally got power and the key pad only lets number go down when trying to set up. Tried the combos every way but i cant get it to select and i cant use until i set type in serial number

American Optical Microscope: Why is the course adjustment nob loose

Thu, 04 Dec 2025 09:00:32 -0700

how to fix the corse adjustment nob

Leica DM750: Leica DM750 jammed head

Thu, 27 Nov 2025 05:48:59 -0700

The eyepiece adjustment for varying the interoculat distance has jammed. How can I release it. Thank you

Marco Ultra Slit Lamp: Whe I move the lamp from right to left the lamp turns off

Tue, 04 Nov 2025 12:51:44 -0700

When I move the lamp from right to left the lamp turns off

⟐ Commented November 04, 2025 at 12:51 MST

Quincy Lab Laboratory Oven: Power Switch on a Quincy Lab 40QC oven

Wed, 03 Sep 2025 11:46:26 -0700

The power on one of my Quincy Lab oven won’t work. It seems to be stuck. Whenever I push in the switch to the “On Position”, it seems very stiff.

⟐ Commented September 03, 2025 at 11:46 MST

Bio-Rad iMark: "Light level error " displayed in screen

Mon, 12 May 2025 17:52:32 -0700

How to calibrate this item ?

Beckman Coulter Delsa Nano: Activation of the "start" button

Fri, 07 Feb 2025 12:54:11 -0700

How can this problem be resolved? The device appears operational, as the light turns green upon startup.

⟐ Edited by author February 07, 2025 at 12:54 MST

Lab-Line Instruments Inc Orbit Shakers 3520: Replacing the shaker mechanism bearings

Wed, 01 Jan 2025 13:45:09 -0700

I replaced the upper bearings 140-130-00, but it seems the shaking mechanism crank assembly bearings 140-236-00 are shot also. Any idea on how to get these out?

Mindray Chemistry Analyzer: Why mindray bs 200e is not talking detergent

Sat, 26 Oct 2024 09:38:21 -0700

The analayzer is not taking the detergent