mA Sink mode
In this mode the CAL-2 simulates a two wire transmitter. Use this
mode where the receiving instrument powers the current loop or
where the loop is powered by a separate power supply (as
shown below). The CAL-2 'sinks' (or regulates) the loop current to
the value set by the Output Level Selector / dial setting.
An external power supply of 12V to 30V DC is required.
For your personal safety and to avoid damage to the CAL-2, ensure
that the external circuit voltage is no greater than 30VDC before
connecting test leads.
Do not connect a power source directly across the CAL-2 output
terminals, the instrument will be damaged.
Please note: the CAL-2 displays a direct reading of the output
signal. With current output modes, in the event of an open circuit
loop, e.g. the instrument not connected or a loop fault exists, the
display will read '0.00'.
I
O
+
COM
Stroud Instruments Ltd www.sil.co.uk
SIL
CAL-2
mA / Volt Calibrator
Power
12V
DC
mA Source
Full-scale
Zero
Dial
Volts
C
mA Sink
(2-wire
transmitter simulator)
+
+
_
+
_
Power
supply
30 V DC
max.
Switch the Output Mode
selector to 'mA Sink'
Volts mode
Use this mode for generating test signals in the range 0 to 10V.
Do not apply any external voltage to the output terminals in this mode,
this may result in damage to the CAL-2
For your personal safety, always ensure that the external circuit is
voltage free before connecting test leads.
STROUD INSTRUMENTS LTD,
36-40 Slad Road, Stroud Gloucestershire UK GL5 1QW
T.
+44 (0) 1453 765433
F.
+44 (0) 1453 764256
E.
www.Sil.co.uk
SIL
I
O
+
COM
Stroud Instruments Ltd www.sil.co.uk
SIL
CAL-2
mA / Volt Calibrator
Power
12V
DC
mA Source
Full-scale
Zero
Dial
Volts
C
mA Sink
(2-wire
transmitter simulator)
+
+
_
Switch the Output Mode
selector to 'Volts'
Doc ref UDCAL-2 Rev 1
WARNING!
It is important that this guide is read and fully
understood before attempting to use this
instrument. Instructions appearing in this
document, and current safety legislation,
must be observed to ensure personal safety
and to prevent damage to the instrument or
equipment connected to it.
Safety Information
The specifications for this instrument must not be exceeded. If the
instrument is used in a manner not specified, the protection provided
by the instrument may be compromised.
This instrument must not be used in explosive atmospheres, e.g.
explosive or flammable gas, dust or vapour.
This instrument contains no serviceable parts or user adjustments and
must not be dismantled. For servicing, repairs or recalibration the
instrument must be returned to the supplier.
Before connecting test leads to the external circuit, ensure the circuit
is voltage free for use in 'mA Source' and 'Volts' output modes and no
greater than 30VDC for 'mA Sink' output mode.
Product Specifications
Please refer to the product data sheet for full specifications. This
is available for download at www.sil.co.uk.
Receipt and unpacking
Please inspect the packaging and instrument thoroughly for any
signs of transit damage. If the instrument has been damaged,
please notify your supplier immediately.
mA / Volt Calibrator
Type CAL-2
User Guide
SIL
