19
4) RUN (it is running a routine).
5) EDIT (the user is editing a routine).
In the following pages each mode will be described completely.
3.1.2 GENERAL NOTES
1) The I/O impedance of the instrument will be equal to:
a) high impedance (>500 KOhm) for STAND BY mode, EDIT
mode, mV, V or TC measurement;
b) low impedance for mA measurement and Ohm simulation;
c) current injection for resistance or RTD measurement;
d) low impedance with 24 V power supply for TX measurement.
e) During RUN mode the I/O impedance will be in accordance
with the programmed action.
2) When the transfer from MEAS to OUT is requested, the
instrument goes automatically in STAND BY mode in order to
assure an high impedance during instrument connection.
3.1.3 GENERAL NOTES ON GENERATIONS
1) During generation, when a new value is desired, it is sufficient to
type directly the new value using the numerical keyboard and to
push the FUNC push-button. The instrument will start immedi-
ately to generate the new value.
2) By pushing s or t push-button, the generated value will be
increased or decreased of 1 LSD.
3) By pushing continuously s or t push-button, the generated
value will change with a rate equal to 2 LSD/second.
4) When, typing a value, an error occurs, push the DEL push-button
and retype the desired value.
SECTION 3 - OPERATING INSTRUCTIONS
3.1 PRELIMINARY
1) In order to assure the maximum accuracy of the instrument it is
necessary to perform a 3 minutes warm-up period before to start
to calibrate.
2) For all TC measurements and simulations and for mV measure-
ments and generations it is suggested to connect the cables
directly to the instrument connectors without any additional plug.
If plugs are required, it is necessary to use gold plated banana
plugs in order to avoid not desired junctions between the cables
and the plug material.
3) For all ranges, it is suggested to use No 20 AWG (0,597 mm
2
)
or larger wires.
3.1.1 OPERATIVE MODE
At power up, the instrument starts in stand by mode (warm-up with
low power consumption) and the display will show:
The instrument may be operative in one of the 5 following modes:
1) STAND BY (warm-up with low power consumption)
2) MEASURE (it is performing a measure)
3) GENERATION (it is performing a generation)
MEMOCAL 2000
STAND BY
M20-e-3.p65 7/9/01, 2:40 PM19
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