Mastech MS7222 Operating Instructions

MS7222
CONTENTS
RTD CALIBRATOR
Introduction ........................................2
OPERATING INSTRUCTION
Safety Information ...............................2
International Symbols
Getting Acquainted
MS7222
RTD CALIBRATOR
With The Calibrator
Auto Power Off Function............................5
Measuring an RTD or Resistance................6
Simulate an RTD or Resistance...................7
Specifications ...........................................8
RTD General Specifications .............................10
TYPE °C/°F
Maintenance .............................................10
Introduction
RTD Calibrator is a handheld tool for calibrating RTD
(Resistance Temperature Detector) transmitters,
including most pulsed transmitters. It simulates and
measures seven different types of RTDs, in units of
°C or °F. It also simulates and measures resistance
.............................3
in units of ohms.
If the calibrator is damaged or something is missing,
contact the place of purchase immediately. Contact your
distributor for information about accessories.
.............................3
Safety Information
To avoid possible electric shock or personal injury:
• Never apply more than 30 V between any two terminals,
or between any terminal and earth ground.
• Make sure the battery door is closed and latched
before you operate the calibrator.
• Remove test leads from the calibrator before you open
the battery door.
• Do not operate the calibrator if it is damaged.
• Do not operate the calibrator around explosive gas,
vapor, or dust.
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International Symbols 1. The RTD type annunciators show the selected
RTD type.
Symbols Meaning
2. Show the measured or simulated value in degrees or
Earth ground ohms. When OL appears, the value is out of range.
3. It will lit when the battery is low.
Battery
4. INPUT will lit when measuring an RTD or resistance.
Double insulated 5. OUTPUT will lit when simulating an RTD or resistance.
6. When an RTD type is selected, one of these is lit to
Conforms to European Union directives
show the selected scale.
Refer to this instruction sheet for information
7. When measuring an RTD, one of these is lit to indicate
about this feature. a two-wire, three-wire, or four-wire configuration.
These annunciators are not used when simulating an
Fuse
RTD or resistance (output).
8. POWER ON/OFF
Getting Acquainted With The Calibrator
9. Press to select input (measure) or output (simulate)
mode.
10. INPUT/OUTPUT terminals.
11. Press to scroll up or down display. Hold down to
scroll faster.
12. In simulate mode, press to step up or down 10° or
10 Ω. In measurement mode, press it to select a
two-wire, three-wire, or four-wire RTD input
configuration.
13. Press to toggle temperature scales between
°C/°F
Celsius and Fahrenheit.
14. Press to select a different RTD type. When you
RTD
TYPE
select the e type (ohms), displayed units are ohms,
not degrees.
03
Auto Power Off function
In the process of measuring or simulating, if there is no
any action on the meter within 30 minutes, the meter will
be Auto Power Off. In auto power off status to press the
key, the meter will power on. The auto power off
function will be cancelled such as following operation:
1. Press the key to turn off the meter, if the meter
power on.
2. Press and hold the key to turn on the meter.
3. The auto power off function will be cancelled.
4. To resume the auto power off function, turn off the
meter and turn on it again, the auto power off function
will be resumed.
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