Mastech MS7220 User manual

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Introduction
The Thermocouple Calibrator is a precise source and measurement tool for calibrating
thermocouple instruments. The calibrator sources or measures in units of C, F, or mV, through
a thermocouple minijack.
If the calibrator is damaged or something is missing, contact the place of purchase immediately.
Contact your distributor for information about accessories.
The following tables list the thermocouple types supported by the calibrator, the standards and
scales used for each type, the thermocouple properties, and calibrator resolution.
Note
Since mV input and output units are available, you
can use the calibrator for any thermocouple type by
making manual calculations or referring to tables.

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Thermocouple Standards and Scales
Thermocouple Type Standard Scale
J, K, T, E, R, S, B, N NIST 175 ITS-90
Thermocouple Properties
Thermocouple Type Temperature Ranges Display Resolution
J -200~1200℃ / -328~2192℉0.1 or℃℉
K -200~1370℃ / -328~2498℉0.1 or℃℉
T -200~400℃ / -328~752℉0.1 or℃℉
E -200~950℃ / -328~1742℉0.1 or℃℉
R -20~1750℃ / -4~3182℉1or℃℉
S -20~1750℃ / -4~3182℉1or℃℉
B 600~1800℃ / 1112~3272℉1or℃℉
N -250~1300℃/ -418~2372℉0.1 or℃℉

Millivolt Range and Resolution
Mode Range Display Resolution
mV -10mV～75mV 0.01mV
Safety Information
Warning
To avoid possible electric shock or personal injury:
Never apply more than 30 V between the TC terminals, or between either TC terminal and
earth ground.
Make sure the battery door is closed and latched before you operate the calibrator.
Remove an attached thermocouple miniplug 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.
When servicing the calibrator, use only specified replacement parts.
Explanation of International Symbols

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The following symbols are used on the calibrator or in this instruction sheet. The table below
explains their meaning.
International Symbols
Symbol Meaning
Earth ground
Conforms to European Union directives
Refer to this instruction manual for information about this
feature

Operation:
Measuring a Thermocouple
①INPUT.
②ShowsTCtypeselect.
③Press to select ON or OFF.
④Press to select TC type or mV.
⑤Press so that INPUT is on the display.
⑥TC wire and mini plug of same type as selected.
⑦Press to toggle ℃or ℉.
Ms7220
MASTECH
R
INPUT
TC
TYPE C F
30V MAX
INPUT
TC TC
TYPE K
OUTPUT
1
2
3
4
5
6
7
TC
TYPE
TC
TYPE

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Simulating a Thermocouple
①OUTPUT.
②Shows TC type select.
③Press to select ON or OFF.
④Press to select TC type or mV.
⑤Press so that OUTPUT is on the display.
⑥Press to step up/down 10°or 1mV.
⑦Press to toggle ℃or ℉
⑧Press to scroll up/down 0.1°or 0.01mV.
Hold down to scroll faster.
⑨TC wire and mini plug of same type as selected.
MS7220
MASTECH
R
INPUT
OUTPUT
TC
TYPE C/ F
30V MAX
INPUT OUTPUT
TC
TYPE K
OUTPUT
TC
1
2
3
4
5
6
7
8
9

Specifications
Specifications are based on a one year calibration cycle and apply for ambient temperature
from +18℃to +28℃unless stated otherwise. “Counts” means number of increments or
decrements of the least significant digit.
Temperature Measure and Thermocouple Simulate（Maximum input voltage：30V）
Thermocouple Type Resolution Error Reference Junction Error
J, K, T, E, N 0.1℃or ℉±（0.3℃+10μV）±0.2℃
R, S, B 1℃or ℉±（0.3℃+10μV）±0.2℃
Maximum input voltage: 30 V
Millivolt Measure and Source（Maximum input voltage：30V）
Range Resolution Accuracy
-10mV～75mV 0.01mV ±(0.02%+2Dgt)

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Maximum input voltage: 30 V
General Specifications
Maximum voltage applied between any terminal and earth ground or between any two
terminals: 30V
Storage temperature :-40℃to 60℃
Operation temperature:-10℃to 55℃
Operation altitude: 3000 meters maximum
Temperature coefficient: 0.05×specified accuracy per℃for temperature ranges -10℃to
18℃and 28℃to 55℃
Relative humidity:95% up to 30℃,75% up to 40℃,45% up to 50℃,and 35% up to 55℃
Vibration: Random 2 g,5 Hz to 500 Hz
Shock: 1 meter drop test
Power requirements: Single 9 V battery (ANSI/NEDA 1604A or IEC 6LR61)
Size: 190mm L×89mm W×42mm H
Weight: Approx. 350g

Maintenance
If the calibrator needs repair, contact your Service. If the calibrator is under warranty, see the
warranty statement for terms. If the warranty has lapsed, the calibrator will be repaired and
returned for a fixed fee. Contact your Service Center for information and price.
Cleaning
Periodically wipe the case with a damp cloth and detergent; do not use abrasives or solvents.
Calibration
Calibrate your calibrator once a year to ensure that it performs according to its specifications.
Replacing the Battery
When the symbol appears on the display, replace the battery with a 9 V alkaline
battery.
Replacing the Fuse
Fuse is probably blown if in the input mode, the calibrator always reads OL, even with a
thermocouple connected.
Made in China