unilab Retro Basic User manual

R04365/125083 Retro Basic PSU NFU 960
R04366/125081 Retro Ranger PSU
R04367/125082 Retro Regulated PSU
Introduction
These three “retro” power supplies are intended for general laboratory use and have some
features in common with the original UNILAB power supplies:
All have a locking mechanism, that can limit or preset the voltage available to
students in specific experiments.
All have 4mm output socket/terminals, for connection of bare wires as necessary
All have a thermal “trip”, which can be reset shortly after removal of the excess
load.
All are robustly made, with captive mains lead and integral cable wraps on the back
panel.
All are protected by a time delay mains fuse in the front panel.
Retro Basic
Retro Regulated
Retro Ranger

Product specifications
Locking mechanisms
Basic and Regulated
A hexagon key is used to turn the locking
screws. Turn any screw anticlockwise until it
just stops. It protrudes from the front panel
and blocks rotation of the control knob.
The screws are captive.
Using a single screw, an upper limit can be set.
Using two screws, a fixed voltage can be set, by
trapping the pointer.
Similarly, it is also possible to lock the power
supply to AC or DC only (Basic).
NOTE: AC and DC are NOT available simultaneously.
Specifications
Retro Basic
Retro Ranger
Retro Regulated
Mains input
230V ac 50Hz
230V ac 50Hz
230V ac 50Hz
Power rating (VA)
80
242
108
Fuse (front panel)
T1A (time delay)
T2A
T1A
Output range (V)
2,4,6,9,12 AC or DC
Unsmoothed
0-15 AC & 0-20 DC
Smoothed by 4700µF
2,4,6,9,12 DC only
Regulated
Max current (A)
4
8 total AC +DC
4
Thermal trip/reset
Yes
Yes
Yes
Temperature &
humidity limits
-5 to 50°C
10 to 90% RH
-5 to 50°C
10 to 90% RH
-5 to 50°C
10 to 90% RH
Dimensions (mm)
290 x165 x 165
290 x165 x 165
290 x165 x 165
Mass (kg)
4.1
5.6
4.3
Similar to UNILAB
022.104
022.106
None
Applications
Basic power supply for
ray boxes, simple
circuits, heaters and
electrolysis.
Higher power for
halogen lamps, heaters
and for basic general
use.
Regulated supply for
quantitative circuit
work, e.g. Ohm’s law,
datalogging.

Ranger
A hexagon key is used to clamp the clear Perspex
disc. The yellow line on this disc indicates the
maximum AC and DC voltage available. The
control knob can be turned to adjust the voltage
output from 0 to the preset maximum.
The DC output is higher due to the internal
smoothing capacitor (4700uF).
NOTE: AC and DC outputs are available
simultaneously, but the total current should be
limited to 8 amps.
Warnings
For your safety, this product should be used in accordance with these instructions,
otherwise the protection provided may be impaired.
EMC
This equipment is Class A according to the EMC standard EN 55011 and is intended for use
in a non-domestic environment only.
Do not open or remove covers or panels. Repairs and service may only be carried out by
our repair agent, otherwise the warranty may be void.
Use only the 3-core mains cable supplied with the unit. If the mains cable is replaced, the
rating of the replacement must be the same or better than the original.
The unit must be earthed at all times. The unit is earthed/grounded through the 3-core
mains lead, so no additional earth connection is required.
Always position the power supply so that it can be disconnected from the mains, if an
emergency arises.
This unit is intended for use in DRY conditions. Avoid spillage of water and other liquids on
to the unit. If spillage occurs, disconnect the mains supply.
There is no specific requirement for insulation of external circuits as they cannot become
hazardous live, as a result of connection to this unit. Limit the length of any connecting
leads to 3 metres.

Cleaning
The front panel membrane conceals and protects switches and LEDs. It may be wiped clean using a
damp cloth. Be sure to disconnect the unit from the mains before cleaning, and do not use any
abrasive cleaners or organic solvents.
Periodic testing
Check the mains lead and plugs at both ends for any damage.
Periodically check the earth bonding and insulation, by performing a Portable Appliance Test (PAT).
Most schools and local authorities have a regular schedule for such testing.
Check the action of the electronic cutout, by short circuiting the power supply output (check dc and ac
outputs separately) using a short 4mm plug lead.
Check that the fuse in the mains plug (5A recommended) and the two fuses (active and spare) in the
IEC socket on the back panel are all of the correct rating.
Warranty, repairs and spare parts
The power supply is guaranteed for a period of one year from the date of delivery to the customer.
This warranty does not apply to defects resulting from the action of a user such as misuse, improper
wiring, any operations outside of its specification, improper maintenance or repair, or unauthorized
modification.
Our liability is limited to repair or replacement of the product. Any failure during the warranty
period should be referred to Customer Services.
In the event of a fault, apart from replacing the instrument fuse in the IEC socket, the power supply
should be referred to the Philip Harris recommended repair agent.
Please contact Customer Services or [e-mail] for advice
Disposal of Waste Electrical and Electronic Equipment (WEEE)
Do not dispose of this product with household waste
For the proper treatment, recovery and recycling please take
this product to an appropriate collection point.
If you are unsure where this is, contact your Local Authority
By disposing of this product correctly you will be providing
positive help to the environment.

Instructions for authorized service technicians
Ensure that any replaceable mains cord is of the correct rating.
Ensure that all earth conductors and protective earth bonding is maintained after service work.
Please refer to the detailed service procedures, safe servicing and continued safety –contact
[e-mail] for advice.
For any manufacturer specific parts please refer to our recommended repairer. Please refer
to product specific risks that may affect service personnel, the protective measures and
verification of the safe state after repair.
Supplier details
Philip Harris Education, 2 Gregory Street, Hyde, Cheshire, SK14 4RH
Orders and Information Tel: [phone]
Fax: [phone]
Repairs Tel: [phone]
E-mail: [e-mail]
Website: www.philipharris.co.uk
© Philip Harris Education, 2002, 2014