ELECTRICAL HAZARD
These guidelines must be followed to ensure that the safety mechanisms in this
instrumentwill operate properly. This instrument must be plugged into a 230
VAC(± 10%) 50/60 Hz only electric outlet. The power cord of the instrument
isequipped with a three-pronged grounding plug for your protection against
electrical shock hazards. It mustbe plugged d irectly into aproperly g rounded
three-prong receptacle. The receptacle must be installed in accordance with lo-
cal codes andordinances. or adapter plug. Additionally, the instrument has a
Permanent EarthGround that must be connected during use. DO NOT use an
extensioncord Consult a qualified electrician.
Alwaysreplace the power cord with an approved cord of the correct rating and
type. If you havequestions, contact a Hart Scientific Authorized Service Center
(see Section 1.3).
The instrument isnot equipped with easily accessible fuses. The fuses are lo-
cated insidethe control drawer. We do not recommend replacing the fuses with-
out calling a Hart Scientific Authorized Service Center first.
High voltageis used in the operation of this equipment. Severe injury or death
may result if personnel fail to observethe safety p recautions. Before working
insidethe equipment, turn off the power and disconnect the power cord.
Alwaysensure that the equilibration block ground is connection prior to use of
the instrument.
1.2.2 Cautions
Alwaysoperate this instrument at room temperature between 41°F and 104°F
(5°C to40°C). Allow sufficient air circulation by leaving at least 18 inches (45
cm) of clearance around the instrument. DO NOTplace instrument in a corner
or block the back of the instrument. Extreme temperatures are emitted from the
back and front of thefurnace. Allow sufficient space in front of the furnace to
workand to insert and remove the probes.
Read Section4 ,Installation, before placing the instrument into service.
DO NOTuse fluids to clean out the well. Fluids could leak into and damage the
instrument.
Neverintroduce any foreign material into the probe hole of the insert. Fluids,
etc. can leak into the instrumentcausing damage.
DO NOTchange the values of the calibration constants from the factory set
values.The co rrectsettin g of these parameters is important to the safety and
proper operationof the unit.
Read and understandthe controller operation prior to operating the instrument.
The controllermanufacturer’s manual is included with the instrument.
DO NOToperate this instrumen tin an excessivelywet, oily, dusty, or dirty
environment.
9112A Calibration Furnace
User’s Guide
4