INSTRUCTIONS

Note 1: this page contains instructions A for Standard meniscus operation, and B for Buretta operation

Note 2: some minor details of your diji type may differ in the diagrams used here but the product use is basically the same.

SAFETY PRECAUTIONS AND WARNINGS – ALL MODELS

1. Mishandling of liquid chemicals and liquids containing biohazards can result in contamination of the user causing injury or death.

2. The failure to follow appropriate and adequate laboratory safety techniques, and/or the use of diji equipment for any purpose other than that for which they are intended, may result in severe injury or even death.

3. Persons using diji equipment for the purposes of technical or laboratory analysis must have adequate and appropriate training to recognise the nature and dangers of any chemicals, biological or other agents that they might handle before attempting to use diji equipment.

4. Always follow safe laboratory practices when using diji equipment including the use of appropriate and adequate hand and eye protection at all times. Always use rubber gloves when using diji equipment with dangerous liquids, and ensure equipment is washed thoroughly immediately after use.

5. Safety warnings and instructions must be read and understood before using diji equipment.

6. To prevent misuse of diji equipment, always keep and display these warnings and safety instructions with the equipment.

7. Use diji equipment only for the purposes of handling industrial and laboratory liquids for technical analysis. Dispense liquids at atmospheric pressure only.

8. Never under any circumstances insert any part of diji equipment into the mouth.

9. The presence of liquid above the seal indicates equipment malfunction in which case the equipment must not be used until repaired.


A Instructions

- diji STANDARD, meniscus and red line reading
  diji ACCUSAFE plastic, meniscus reading only

Ensure diji is equipped with a meniscus operation Syrette (pipette).This has a bottom graduation mark less than total Syrette volume e.g. 10mL = 9.3mL - - 25mL = 23mL

  • Hold the hand-piece in the palm of your hand with the piston rod exiting the hand-piece under your thumb.
  • Stroke the piston rod with your thumb or pull the ball on the end of the piston rod – upwards to suck fluid and downwards to dispense. Pull steadily without causing cavition.
  • Before filling, wet the seal with some of the fluid being handled by thumbing up and down with the seal in the jet.
  • Start filling with the piston fully in the Syrette (Syrette = pipette).
To use by reading the Meniscus: The full Syrette volume has been dispensed when the jet is empty.
Thumb upwards to fill diji to above the desired level. Thumb downwards to set meniscus at desired level. Read the bottom of the meniscus at the top of the graduation line. Dispense with the tip of the diji Syrette touching the side of the receptacle.
To expel the last drop, retract the seal one thumbstroke, wait 3 seconds and then push the piston down fully again, once only, with the Syrette tip touching the receptacle.
To use by reading the red line: The full Syrette volume has been dispensed when you start at the negative graduation and dispense until the red line is level with the bottom FULL graduation mark, e.g. -1mL to 9.0mL = 10mL dispensed.
Thumb the seal rapidly up and down in the jet to remove most of the air from below the seal.Thumb upwards to set the red line exactly on the desired starting point. Remove drips from the Syrette tip. Dispense with the tip of the diji Syrette touching the side of the receptacle. When using the red line, make sure you do not draw air into the Syrette accidently while dispensing, as this will result in inaccuracies in volume.

WHY USE RED LINE?
  • Use red line reading for accurately measuring viscous fluids and highly coloured fluids
  • to avoid possible final volume being in unmarked jet area
  • generally when titrating rather than making a full Syrette volume transfer.

BEST USE OF diji

Holding the diji towards the horizontal when not actually dispensing reduces the hydrostatic head of the fluid in the Syrette and eliminates the possibility of any unwanted drops at the tip – even if the seal is leaking. There is no chance of contamination because the fluid is isolated by the PTFE seal.

CLEANING

  • General use – Clean the inside of the Syrette by filling and emptying with water.
  • Thorough clean -Remove Syrette from handpiece and wash all parts separately as glassware.
  • diji is steam autoclavable at 120°C for 20 minutes. Preferably remove piston from Syrette, this will reset the curl in the piston rod.
  • Cleaning for immediate reuse with another chemical - Flush with water. Take up a small amount of chemical to be used, invert diji then draw up the piston, dispense all fluid to waste. Repeat according to sensitivity of test procedure. Fill with required chemical and proceed.

ADJUSTING THE SEAL

Wash all chemicals off seal area – ensure Syrette is moistened inside.

Increase or decrease the seal diameter as follows:

  1. Grasp the seal and turn clockwise (looking up the piston from the seal end) to tighten, anticlockwise to loosen. Turn seal as many times as needed to expand the seal diameter. Final adjustment should require only about 1/2 a turn
  2. Reinsert seal into Syrette to test fit. Repeat as needed.
  3. Screw Syrette into the handgrip..

GENERAL

  • Diji should never leak as the seal diameter is adjustable as in the diagram below, and diji can be held horizontally thus preventing any leaks.
  • All parts are replaceable and diji is fully fixable

ACCUSAFE, Plastic diji chemical resistance:

Do not use plastic diji with aromatic solvents such as Acetone, Methanol, higher concentrations of Ethyl Alcohol,Benzene. Some very concentrated acids will affect the plastic.Check for various chemical resistance by going to the following website:
http://www.nalgenelabware.com/techdata/chemical/index.asp
Proceed as follows:
1. In the Material / Resin box, cursor down and select Styrene Acrylonitrile
2. In the Chemica lReagent box cursor down and select the reagent in question
3. In the Chemical Class box put nothing
4. Click search
DIJI PIPETTE BURETTE STANDARD SEAL ADJUSTMENT

B INSTRUCTIONS

- diji BURETTA, red line reading

Use Syrette with bottom graduation marked with total syrette volume e.g. 25ml

The full Syrette volume has been dispensed when you start at 0 and dispense until the red line is level with the bottom graduation mark, e.g. 0mL to 10mL = 10mL dispensed.

TO OPERATE diji BURETTA

Hold the hand-piece in the palm of your hand with the piston rod exiting the handpiece under your thumb.

  1. Stroke the piston rod with your thumb – upwards to suck fluid and downwards to dispense. For rapid filling, pull the coloured ball on the end of the piston rod.
  2. To fill, firstly expell most of the air below the seal. To do this, set the seal fully down into the jet, thumb the piston rod up and down rapidly.
  3. Thumb upwards to fill diji to the desired level. Fill slowly to avoid cavitation and sucking in air below seal.
  4. Read the fluid level at the middle of the red line. – see diagram below
  5. Dispense with the tip of the diji Syrette touching the side of the receptacle. (See end of Industrial Video)

BEST USE OF DIJI

Try to develop the habit of holding the diji towards the horizontal when not actually dispensing, this action reduces the hydrostatic head of the fluid in the Syrette and eliminates the possibility of any unwanted drops at the tip – even if the seal is leaking. There is no chance of contamination because the fluid is isolated by the seal.

CLEANING

  • General use – clean the inside of the Syrette by filling and emptying with water.
  • Thorough clean - remove Syrette from handpiece and wash all parts separately as glassware.
  • diji is steam autoclavable at 120°C for 20 minutes.
  • Cleaning for immediate reuse with another chemical - Flush with water. Take small amount of chemical to be used, invert diji then draw up the piston, dispense all fluid to waste. Repeat according to sensitivity of test procedure. Fill with required chemical and proceed.

ADJUSTING THE SEAL

Wash all chemicals off seal area – ensure Syrette is moistened inside.

Increase or decrease the seal diameter as follows:
  1. Grasp the seal and turn clockwise (looking up the piston from the seal end) to tighten, anticlockwise to loosen
  2. Reinsert seal into Syrette to test fit. Repeat as needed.
  3. Screw Syrette into the handgrip. Final adjustment should require only about 1/2 a turn.

PREVENT DISTORTION OF THE SEAL AND INCREASE RELIABILITY BY WITHDRAWING IT SLIGHTLY FROM THE JET WHEN NOT IN USE.

 

GENERAL

  • Diji should never leak as the seal diameter is adjustable as in the diagram below
  • All parts are replaceable and diji is fully fixable
DIJI PIPETTE BURETTE SEAL ADJUSTMENT 1 & 2 mL