Ametek mAcal Specifications
signal
»
Sources and measures current
Allows for calibration of transmitters in a twowire loop
»
Stable source
Internal 24 VDC supply for consistent
loop power
»
High resolution
Read to 0.001 mA in the measurement mode
»
% of full scale reading
Displays a percentage to provide for easy
analysis of results
milliAmp Calibrator
mAcal
»
Timesaving features
Fast one-key-one-function access to the
features such as the step function or loop
supply power
»
Large display
Includes large numbers for unit reading, a
percentage display, and dedicated icons for
calibrator status including a low battery
indicator
»
Traceable calibration
For your confidence, the unit is supplied with
a calibration certificate that is fully traceable
to a national standards lab such as NIST or
NPL
»
Complete marine program
Part of a complete program of marine
approved temperature, pressure and signal
calibrators; including temperature sensors
ISO 9001 Manufacturer
The mAcal milliAmp Calibrator is an economical and easy-to-use calibration device for sourcing and measuring mA signals.
The instrument is designed specifically for 2-wire transmitter loops with 4
to 20 mA signals and it is delivered with traceable certification.
The keypad is easy-to-use and provides positive tactile feedback. Each
key is labeled for easy operation. A large, high-contrast, 5-digit LCD display indicates numeric values in mA, %, V or sec. The resolution is 0.001
mA in measurement mode. The user can change the display to read in %
of Full Scale and flow readings are shown in % of Flow.
The display also indicates error codes. Visual warnings are displayed for
loop mismatch, reverse polarity and over range. And is also equipped
with a user adjustable automatic shut-off feature that prevents accidental
battery discharge when the unit is not in use. A built-in, permanent fuse
eliminates the need to replace the fuse in the case of overloads: no need
to return the unit to the factory to reset or replace the fuse.
The mAcal provides loop power in the range of 0 to 45 VDC and the
instrument is designed to generate a stable 24 VDC supply for the loop.
The mAcal also reduces the time and complexity often associated with
loop calibration. The instrument features special fixed steps for performing linear and flow transmitter or valve positioner calibrations. The instrument has seven different built-in current values and the user may choose
between manual or automatic steps with 10 or 30 seconds between
steps. You can perform an entire test by placing the mAcal in the process loop and take readings from the control room.
Specification Sheet, SS-MACAL
PWR
Switch between external and
internal loop power supply EXT.
(the +24 VDC of the current
loop is generated by an external
power supply) and INT. (the +24
VDC of the current loop is generated by the mAcal itself).
Mains adapter
Connection to mains adapter.
6 VDC, 230 mA.
Note : The mains adapter does
not charge rechargeable batteries.
ON/OFF
Switching instrument on/off.
Auto shut-off to extend battery
life (user programmable).
mA/% / setup
Alternating between readout in
mA and %. If the key is held
down for more than 2 sec., a
change to SETUP takes place.
Under SETUP this key is used
to select next parameter.
Connection
Connection of +
test lead
Connection
Connection of - test
lead
Display
Shows numerical value in
mA, %, V or sec., and for
readout of error codes etc.
FUNC
This key allows for changing
functions between SOURCE
mA, MEASURE mA and
MEASURE Volt function.
Step
The STEP function is activated or de-activated.
Up arrow
Functions to increase
entered values or to scroll
up.
Auto
AUTO ramp or AUTO-STEP
function is started or stopped.
Down arrow
Functions to decrease
entered values or to scroll
down.
JOFRA mAcal in softcase
The mAcal calibrator is available separately and are supplied in a handy softcase that
allows for complete operation of the unit while in the case. The convenient internal
arrangement offers you the space to store test leads.
2 www.jofra.com milliAmp Calibrator • mAcal
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