Meatest M133C User manual

M133C Three (single) phase power calibrator is a multifunction calibrator used primarily as a standard
for calibration laboratories. It can be used for calibration of any measuring instrument which measures
voltage, current, power, energy, phase and frequency. The calibrator is equipped with a built-in
multimeter, which can be used simultaneously with output functions. Transducers of various types,
regulators and sensing units can be therefore checked without the need for additional measuring
instruments.
M133C model is equipped with special functions for testing power line voltage analyzers. It can generate
calibrated harmonic and interharmonic distortion, fluctuation harmonics, flickers, ramp signals and
others.
M133Ci model is delivered without the option of harmonic/interharmonic functions.
Basic features of the calibrator include generation of calibrated AC voltage in the range of 1 V to 600 V
and DC voltage in the range of 1 V to 280 V, DC and AC current in the range of 5 mA to 30 A. Phase
shift for all outputs (3x voltage and 3x current) can be set independent for each output. The best accuracy
of the calibrator is 0.025 % for voltage and 0.035 % for current. Internal ranges (voltage 10, 30, 70, 140,
280 V and 600 Vac, current 0.3, 1, 2, 5, 10 and 30 A) are suitable for accurate testing of power
transducers. Maximum frequency range is 15 Hz to 1000 Hz.
Internal multimeter with 20 mA, 10 V and 10 kHz (0.02 % accuracy) can be used to measure normalized
signals coming from transducers.
The calibrator can easily fit within calibration systems featuring Power software support.

The front panel of the calibrator includes a TFT color display, control buttons and output terminals. The
following picture shows the control part of the front panel.
1. Display - The display is divided to three horizontal sections:
A) Information line:
-Selected function (Pac Basic –Power AC basic mode)
-Date and time
-Remote control state (Local –keyboard, Remote –computer)

B) Main area - This section displays the set-up values of generated signals and the data related to
the calibrator status. The section includes the following types of data:
1. Main value - There is displayed main output value with the unit and indication of AC or DC
(picture). There is displayed also actual position of cursor if the parameter is in edit mode.
Position of cursor can be changed using keys , and parameter can be changed using keys
, or using the rotary knob. If output voltage exceeds 50V sign of danger voltage is
displayed before main value.
2. Auxiliary parameters - This section displays auxiliary parameters of actually selected function:
-Voltage (functions power and energy)
-Current (functions power and energy)
-Phase / Power factor (functions power and energy)
-Frequency (AC functions)
-Power (energy)
-Dose of energy (energy)
3. Measured value - Value measured using internal multimeter with unit. Value „over“ is displayed
if measured signal is out of range.
4. Outputs state - Window displays which phase units are connected (one phase to three phase),
which terminals are used for signal generation and also informs about output voltage higher
than 50V.
Symbols displayed in window:
- warning, displayed if output voltage is higher or equal 50V.
- phase unit (channel) is connected, output is off
- phase unit (channel) is connected, output is on
- phase unit (channel) is not connected
5. Specification
6. In the field specification of set-up output signal is shown. Uncertainty is related to the main
parameter. Label BUSY instead of uncertainty is displayed, if calibrator is not within specified
parameters or if internal reconnection is in process. This can occur during changing the
functions, changing set parameters, switching output terminals ON and OFF. Specification is
not available in power functions „P Harmonic“ and „P Interharmonic”.
7. Information section
The information section located in the right part of the display and displays additional
information related to the selected function:
-information about the grounding method of output terminals: GndU, GndI as set up
using the menu „Calibrator“.
-information about voltage terminal configuration (2-wire / 4-wire) as set up using the
menu „Calibrator“.
-information about the use of 25-turn coil or 50-turn coil (COIL x50) as set up using the
menu „Calibrator“.
-information about number of controlled output channels (only functions „Power Pac“
and „Energy Eac“).
8. Meter’s information section
C) Display softkeys - The functions of these keys change during operation (depends on actual
display mode).
2. Rotary knob - The rotary knob integrates several functions. By turning the knob to the left or right,
the user can:
-step through the options
-enter numeric values
The function of the rotary knob can usually be performed by the cursor buttons. The central button
is used to confirm the selection (Select) or change the function of the rotary knob (value change or
position change).
3. Numeric keyboard - The keyboard allows the entry of numeric values on the display. ENTER
button is used to confirm the selection. CANCEL button can be used to cancel the entry.
4. Direct keyboard - MENU button is used to open the Main menu of the instrument (parameters
petting). SAVE (RECALL) buttons can be used to save (recall) the actual setting of the instrument

(all values including parameters). Capacity of the memory is up to 100 different settings. Each
setting contains simple text description.
5. Function buttons - Function buttons can be used to call-up the functions of the calibrator directly.
The following buttons are provided:
After the function mode is changed, the parameters of the respective function are restored. If the
respective function was never used, the calibrator resets to its reference values.
6. Display buttons - There are five buttons below the display, whose meaning changes depending on
the contents of the display. These buttons usually call-up the “local Menu” (units, modes, etc.).
7. Cursor buttons - The keyboard includes two buttons (, ) which allow the cursor to be set to the
required position at the display. These buttons are usually used to step through the options and to
move from one option to another or between the menu levels. Numeric values can be set in some
control modes as well. In these cases, the buttons marked (, ) allow the user to increase or
decrease the number at the cursor button.
The central button is used to select value you want to change (TAB).
8. Meter input - Input terminals for internal multimeter. The COM terminal is common for all
measuring. The V terminal is for DC voltage (10V) and frequency (10kHz) measuring. The mA
terminal is for DC current (20mA) measuring.
9. Auxiliary input - Auxiliary input terminals for energy counting and for AC output signal
synchronization.
10. Power switch - Turns instrument AC power ON and OFF.
11. Voltage output - Voltage outputs HI and LO terminals (three phases L1, L2 and L3).
12. Current output - Current outputs HI and LO terminals (three phases L1, L2 and L3).

Common rules are used for applied color of labels and values.
1. Red color is applied, when displayed value is measured by the calibrator.
2. Blue color is applied for parameters or values, which can be set-up or modified directly from
front panel keyboard or via Main menu.
3. Black color is used for fix values, labels, notes, parameters which cannot be modified and for
other fix text with general information purpose.
4. Meaning of display buttons is always shown the lowest line. If there is no description above
display button, the button is not active in selected function.
Rear panel includes ventilation holes, power cord socket, power line fuse, power line voltage selector
115/230V, fuse for internal multimeter, interface connectors GPIB, RS232 and RJ45, BNC outputs
connectors and metal central ground terminal.
1. Forced ventilation holes
2. GPIB, RS-232 and RJ45 connectors
3. From right to left:
1) Energy pulse output - reference output (see Energy pulse output in Chapter 4.2)
2) Sample reference output - manufacturing and service only
3) Phase reference output - internal reference signal for 0 ° phase (all output channels are
synchronized with this signal)
4. From right to left:
1) power line switch
2) fuse for internal multimeter (T100mA / 250V)
3) power line fuse
5. Central ground terminal
6. Power line entry

Basic accessories (included in delivery)
-Power line cord 1 pc
-User´s manual 1 pc
-Test report 1 pc
-Spare fuse 1 pc
-Test cable banana-banana 1000V - 32 A, black 3 (1) pcs
-Test cable banana-banana 1000V - 32 A, red 3 (1) pcs
-Test cable banana-banana 1000V - 32 A, blue 3 (1) pcs
-Test cable banana-banana 1000V - 32 A, yellow 3 (1) pcs
-133-01 High Current Adapter 1 (0) pc
-RS232 cable 1 pc
(Test cable 1000V/32A –12 pcs with Three phase version and 4 pcs Single phase version)
Values in brackets are for single phase version. Delivered with EU plug, other plug types available upon
request.
Following accessory is not part of standard delivery and can be extra ordered:
-140-50 Current coil 25 and 50 turns up to 1000A
-151-25 Current coil 25 turns up to 2250A
-Option 10 Test lead 32A/1000V (black)
-Option 11 Test lead 32A/1000V (red)
-Option 12 Test lead 32A/1000V (blue)
-Option 13 Test lead 32A/1000V (yellow)
-IEEE488/IEEE488 GPIB cable, 2m
-Caliber Universal application SW for automated calibration.
Calibrator is available in Three or Single phase version. Both versions look the same. The only
difference is that the Single phase version doesn’t contain channels 2 and 3. Single phase version can
be upgraded to Three phase version by the manufacturer.
Standard part of delivery the three-
phase power calibrator is the
option 133-01. Using this adapter
all current outputs are connected in
parallel and the configuration can
deliver up to 90 A in single phase
mode.