ETI 822-950 User manual

User Manual
CALIBRATION BATH
Product Code
822-950

CONTENTS
• Calibration bath
• UK mains lead (with 13A rated fuse)
• Bath lid cover
• Bath operation manual
• Threaded drain connector
• 5/8” ID Rubber tubing
On receipt of your calibration bath ensure it is checked for any noticeable damage
before powering on and that the plug has the appropriate fuse before plugging into an
AC outlet.
The calibration bath offers an affordable temperature environment to test factory
reference equipment with a user-friendly LED display and with minimal setup required.
*It is possible to achieve a higher level of accuracy, better than ±0.2 °C if the calibration
bath is used in conjunction with a certied Reference Thermometer
SPECIFICATION
FILLING THE BATH
Ensure the internal bath surfaces are clear and that the drain outlet is closed
before lling with your chosen contact uid. Fill to between 30mm and 10mm
under the lip of the bath (4L)
Temperature range 25 °C – 60 °C use Distilled water.
Temperature range 60 °C – 80 °C use 15% Glycerine water solution.
Temperature range 80 °C – 95 °C use Silicone oil.
Range 25 to 95 °C
Resolution 0.1 °C/ °F
Accuracy ±1 °C (+25 to 70 °C) *
Bath Capacity 5 litres
Pump Flow/Speed 0 to 20 litres per minute
Bath Stability ±0.1 °C over a 45 minute period
Bath Uniformity ±0.1 °C When measured from centre to
any corner
Power 230 volt AC (±10%) 1.5A
Internal Dimensions 130 x 130 x 260 mm
External Dimensions 318 x 380 x 445 mm
Weight 12000 grams

OPERATION
FUNCTIONS
Indicates the circulating pump is powered when the ‘RUN’ button
has been pressed for 2 seconds. When the calibration bath is set
to standby and not on ‘RUN’ the LED should not be lit.
The pump speed is user set via the control dial on the back of the
instrument.
(1)
(2)
(3)
(4) (5)
Indicates the heater circuit is powered when the ‘RUN’ button has been pressed for
2 seconds.
Indicates the uid level is lower than 30 mm recommended for operation.
Pressing the ‘RUN’ button for 2 seconds turns the heater and pump control on
allowing the microcontroller to achieve the set point and inducing a short repeated
beep. If already running, holding the button for 2 seconds will turn the heater and
pump off signalling another beep.
Pressing the ‘SET’ button allows the user to navigate the display.
On pressing ‘SET’ the user can press ‘UP/DOWN’ to select either the timing
function or temperature set point. Pressing ‘SET’ again enters the menu allowing
the user to change the values up and down and moving through the values right
to left using the ‘LEFT’ key. Once the correct setting has been entered press ‘SET’
again to come out of the menu.
• Temperature set point values can be set from 25 °C – 95 °C.
• Timing function values can be set from 0 – 9999.
• A time value of ‘0’ indicates the unit is always on.
Selecting a value other than 0 will set a time in minutes before the calibration bath
defaults to standby, signalled by a loud repeated beep and displaying ‘END’ on the
touch screen.
PUMP SPEED
OFF
PUMP SPEED
OFF
PUMP SPEED
OFF
PUMP SPEED
OFF
PUMP SPEED
OFF
PUMP SPEED
OFF
Pump Speed
OFF

Supplied by
Electronic Temperature Instruments Ltd
Easting Close, Worthing, West Sussex BN14 8HQ
01903 202151 · [email protected] · etiltd.com
822-950/03.11.20
SAFETY
! If using Silicone oil, do not ll to the lip of the bath in one go. The effects of
thermal expansion will cause the volume of oil to expand as the temperature
rises and will cause the bath to overll, creating a slip and burn hazard. For
this reason we do not recommend leaving the bath unattended when using
Silicone oil.
!It is recommended the user monitors the depth of the liquid and adjusts
accordingly to ensure this does not occur. An approximate guide for lling is
to ll 3L of oil then heat to the appropriate temperature before topping up
and allowing for further expansion of the new oil.
!Only test within the front 130mm3of the bath, keeping objects free from the
back of the bath where the circulation pump is located.
THERE ARE NO USER SERVICEABLE PARTS INSIDE.
DRAINING THE BATH
Disconnect the power from the calibration bath before draining or have an
empty container with suitable volume (5L) to hand screw the threaded adaptor
into the mouth of the tap and connect the rubber hosing if needed to control
the ow towards a container. Open the tap fully with a 90° turn and allow the
bath to empty.
Once the ow has lessened, twist the handle 90° back, at with the bath to close.
The tap and the threaded tap/ hose can then be disconnected.
Using a paper towel, dry the remnants of uid from inside. The bath can now be
lled with a different contact uid or safely set aside for storage.
GUARANTEE - This instrument carries a one-year guarantee against defects
in either components or workmanship. During this period, products that
prove to be defective will, at the discretion of ETI, be either repaired or
replaced without charge. The product guarantee does not cover damage
caused by fair wear and tear, abnormal storage conditions, incorrect use,
accidental misuse, abuse, neglect, misapplication or modication. Full details
of liability are available within ETI’s Terms & Conditions of Sale at etiltd.com/
terms. In line with our policy of continuous development, we reserve the right
to amend our product specication without prior notice.