How to Calibrate & Adjust
the G4500 Portable
BLACKBOX
Using TELNET Interface
Contents
I.
Introduction ............................................................................................................................. 3
II.
Calibration and Adjustment Procedure ................................................................................... 3
III.
Getting Started .................................................................................................................... 4
IV.
Voltage Calibration .............................................................................................................. 5
IV.1
Voltage Neutral Calibration ............................................................................................. 6
IV.2
Voltage Phase Calibration ............................................................................................... 9
V.
Current Calibration ................................................................................................................ 12
V.1
Calibrating the I1-N Currents - Elspec Clamps ............................................................... 13
V.2
Calibrating the I1-N Currents – Custom Clamps ............................................................ 21
V.3
Calibrating the I5 Elspec & Custom Current .................................................................. 24
V.4
Calibrating Current Phase Clamps - Elspec Clamps ....................................................... 24
V.5
Current Phase Calibration - Custom Clamps ................................................................. 30
VI.
Auxiliary DC Voltage Calibration........................................................................................ 36
VII.
PT 100 Temperature Calibration ....................................................................................... 39
2
Introduction |
I.
Introduction
The G4500 Portable BLACKBOX accurately measures power parameters, and in order to
comply with Elspec’s quality standards of excellence, prior to shipment each unit is
calibrated at an accuracy rate that exceeds IEC-61000-4-30 Class A standards. At Elspec we
understand the need for maintaining this accuracy level during the product’s life-time and
use, whenever it is required to do so. We therefore included the calibration and adjustment
capability through a Telnet interface in the many design features of the G4500 Portable
BLACKBOX. In addition, calibrations for custom clamps and the I5 channel calibrations may
be achieved by utilizing Elspec’s Internal Website. In this document we explain how to
calibrate and adjust your G4500 Portable BLACKBOX in your facility.
Figure I: G4500 Portable BLACKBOX Calibration
II.
Calibration and Adjustment Procedure
For your convenience Elspec has created specific Telnet commands for the calibration and
adjustment procedure. It explains how to calibrate AC/DC Voltages as well as AC current.
The calibration for the neutral phase (VN) precedes all the other calibration procedures (V1,
V2 & V3). The procedure includes:







Neutral Phases preceding AC Voltage
AC Current
DC Current
DC Voltage
DC Current
PT 100
The G4500 BLACKBOX is designed to simultaneously sense each voltage and current
channels in two measurement ranges. Referred to as “Low” and “High”, the ranges deliver
the most accurate readings among a whole measurement range from a very low value up
to an “over” voltage and current range.
3
Introduction |
The process runs automatically, and it actually adjusts the internal measurement
coefficients should the detected measured value be out of the designed accuracy
boundaries.
The principle of the adjustment process is a two stage process:
1. The source equipment (calibrator) is being configured to deliver a stable predefined
voltage and current values at a maximum accuracy,
2. The internal software of the BLACKBOX’s automatically runs the actual calibration and
adjustment procedure. This is done via the Telnet interface which in itself requires
“expected value” variables to be defined in advance.
The names and values of the parameters are defined by including them in brackets i.e.:
{variable name or value}. The first step of each calibration procedure is to establish these
variables. Then specific commands are applied to the variables to direct the specific
calibration process. All other commands contained within these procedures are static and
cannot be changed. Simultaneously, the correlating variable values are entered onto the
calibrator itself in the “Waveform menu”. These values may differ according to the
calibrator type that you are using. In this document Elspec is using a standard signal
generator.
III.
Getting Started
Prepare the following items in advance, before you start the procedure:
 G4500 Portable BLACKBOX that needs to be calibrated
 AC Voltage leads
 AC Current clamps
 DC Voltage leads
 DC Current Clamp
 PT100 Sensor
 Calibration Instrument: You may use any device that measures up to the IEC standards,
with a minimum voltage rating of 1000 volts, and current output of at least 20A).
You now need to connect the G4500 unit via TELNET:
 Select: Start→Run:telnet(UnitIP)
 Enter User Name: PQ4xx
 Enter Password: PQ4xxPQ4xx
For your convenience, you may also find the unit’s IP via Elspec Search (according to the
unit’s serial number).
You will now need to connect the G4500 BLACKBOX to the calibration instrument with the
relevant cables (for each calibration category).
Set the following configurations on your BLACBOX unit:

Frequency – the Nominal frequency should be 50/60Hz according to your calibrator
frequency
Topology - Wye 4 wire
PT and CT – disable all PT’s and CT’s Ratios


4
Getting Started |
IV.
Voltage Calibration
In order to maximize the calibration accuracy for the device, we recommend establishing
Low and High voltage ranges to calibrate the voltage inputs. Use values 300V and 750V
respectively. These are also the specified voltage values outlined in the G4500 BLACKBOX
Device specifications. All Phase voltages are calibrated referring to Neutral and the Neutral
terminal, and it is calibrated with reference to the Earth. Therefore if we want to rely on
the accuracy of the phase voltage calibration, we recommend that you first calibrate the
Neutral input.
It is recommended (not a prerequisite) to open the Monitoring page on the web interface
of the BLACKBOX unit, in order to simultaneously monitor the Voltage & Current RMS, and
Waveforms during each step of the calibration process:
Open the Elspec’s Search Utility & locate your BLACKBOX via the devices’ serial number, and
access your device via the WEB.
Figure 2: Access via Elspec Search
1. Login to the Internal Website & select “Login”.
Figure 3: Internal Website – Login Administrator
2. Open the “Monitoring” Tab, select “Voltage & Currents” option:
Figure 4: Internal Website – Monitoring Voltage & Current Page
5
Voltage Calibration |
3. Alternatively switch to Waveform page. Select “Monitoring”, “Waveforms”:
Figure 5: Internal Website – Monitoring Waveforms Page
IV.1 Voltage Neutral Calibration
The following procedure will demonstrate how to perform both a Low and High Voltage
Neutral Voltage Calibration. Repeat the procedure twice: once for the Low voltage and
once for the High voltage.
Note: Every time you calibrate the Low value, you will need to calibrate the High
value. In addition ensure that you are working on an official version.
Calibrating the Neutral Voltage Low:
1. Set the Signal Calibrator Voltage at 300V RMS
2. You now need to connect the G4500 BLACKBOX to the calibration instrument with the
relevant cables. The Neutral connection is unique and differs from the other
connections. Connect the phase and ground cables to the device as demonstrated
below: L1 in the calibrator to L1 in the device
 L2 in the calibrator to N in the device
 Ground to Ground
Figure 6: Voltage Neutral Calibration
6
Voltage Calibration |
3. In the Telnet menu define and set the parameters. The Telnet format reads as
follows:
{variable name}=(float)value
4. Define the low voltage parameter by entering:
VLow=(float)300
Figure 7: VLow Value Assignment
5.
Initiate the Low Neutral Voltage Calibration by entering:
CalibrateVoltageNeutralLow VLow
Figure 8: Calibration of the Low Neutral Voltage Command
Note: Each calibration step will take a few minutes. Please be patient until you
receive the “Calibration success, results…” message.
This will be followed by a success screen confirming Low Range Neutral Voltage
calibration:
Figure 9: Calibration Success
7
Voltage Calibration |
Calibrating the Neutral Voltage High:
1. Once again set the Signal Generator Voltage at 750V RMS
2. In the Telnet menu define the high voltage parameter by entering:
VHigh=(float)750
Figure 10: VHigh Value Assignment
3. Initiate the High Neutral Voltage Calibration by entering:
CalibrateVoltageNeutralHigh VHigh
Figure 11: Calibration of the High Neutral Voltage Command
This will be followed by a success screen confirming Low Range Neutral Voltage
calibration:
Figure 12: Calibration Success
8
Voltage Calibration |
IV.2 Voltage Phase Calibration
To calibrate the phase voltages:
Once the Neutral has been calibrated, then we recommend calibrating the phase voltages
for both the Low and High values. All phase voltage calibration for L1, L2, and L3 are
calibrated simultaneously. As in the Neutral calibration procedure, Phase calibration is
performed in two separate phases; first the Low Voltages followed by the High Voltages.
The variable names can inherit new values for each procedure therefore it is not required
to establish new variables.
1. Set the Signal Calibrator Voltage at 300V RMS
2.
You now need to connect the G4500 BLACKBOX to the calibration instrument with
the relevant cables. Connect the phase and ground cables to the device as
demonstrated below: L1 to L1 (Red to Red)
 L2 to L2 (Yellow to Yellow)
 L3 to L3 (Blue to Blue)
 Ground to Ground (Green to Green)
 Earth to Earth (Black to Black)
Figure 13: Connection for the Voltage Phase Calibration Cables
Note: The phase voltage indicators light up when phase inputs are properly
connected.
3. As you have already defined the High & Low voltage parameters in the Telnet menu
during the Neutral phase calibration, the Telnet memory will recall these values. It is
not therefore necessary to reset these values again. Directly initiate the simultaneous
V0,V1,V2 & V3 low range calibration by entering the following command:
CalibrateVoltagesLow (VLow)
9
Voltage Calibration |
Figure 14: Calibration of the Low Range Voltages Command
When all phases will be completed, it will be followed by a success screen
confirming the calibration for the Low Range Voltages:
Figure 15: Calibration Success for the Low Range Phase Voltages
4. Repeat the process for the simultaneous high range calibration V0,V1,V2 & V3 by
entering the following command on the Telnet screen:
CalibrateVoltagesHigh (VHigh)
10
Voltage Calibration |
Figure 16: Calibration of the High Range Voltages Command
When all phases will be completed, it will be followed by a success screen
confirming the calibration for the High Range Voltages:
Figure 17: Calibration Success for the High Range Phase Voltages
11
Voltage Calibration |
V.
Current Calibration
We calibrate the current inputs by injecting the voltage and current simultaneously. The
voltage channel reading is required for PLL synchronization, and it would be enough to
establish only one phase voltage during the “current adjustment” process outlined below.
The current values required are directly dependent on the upper and lower limits of
Elspec’s clamping device (refer to Table 1). In addition, you may also use your own custom
clamps and the upper and lower limits of the clamps are dependent on the products’
specifications. The use of a turn coil is usually necessary to multiply maximum current limits
of the calibration instrument. It is important to make sure that each clamp is calibrated to a
unique phase and labelled accordingly (I1, I2, I3 and IN). Switching clamps and phases may
result in inaccurate calibration. As part of the procedure, you need to calibrate each clamp
to each current input for both Low and High current values respectively. You may use the
same assigned variable name throughout the entire procedure and re-assign its value.
Figure 18: Current Calibration Connection
Low Current
Value
High Current
Value
Mini Clamp 1-6A Model 1
Catalog # SOA-0030-0500
0.3A
3.0A
Mini Clamp 1-6A Model 2
Catalog # SOA-0030-0500
0.3A
3.0A
Mini Clamp 100A
Catalog # SOA-0180-5000
30A
N.A
Flexible Clamp 300A
Catalog # SOA-9091-3000
30A
300A
Flexible Clamp 3000A
Catalog # SOA-9091-3001
300A
3000A
DC Current Clamp
Catalog # SOA-0270-1400
150A
1500A
Clamp Type
Illustration
Table 1: Elspec Clamps for Current Calibration
12
Current Calibration |
V.1 Calibrating the I1-N Currents - Elspec Clamps
1. Attach the current clamp you wish to calibrate, to the appropriate current input on
the G4500 Portable BLACKBOX (I1 for I1 calibration; I2 for I2 calibration; I3 for I3
calibration; IN for IN calibration).
2. The blue indicator light will light up to confirm a solid connection
Figure 19: I1 Connected
3. Place clamp around Turn Coil (when applicable)
Figure 20: Current Clamp and Coil
4. Set Signal Generator to appropriate current calibration value (Refer to Table1).
5. You now need to define a low current clamp value by entering the float parameter in
the Telnet Menu. (THE EXAMPLE WE ARE USING IS FOR THE FLEXI CLAMP 300 AMP,
LOW CURRENT VALUE IS 30 AS MENTIONED IN THE TABLE 1 ABOVE):
ILow=(float)30
Figure 21: ILow Value Assignment – Elspec Flexi Clamp 300 Amp
13
Current Calibration |
6. The “I1-4” series current calibration is done individually, and as in the Neutral
calibration the Telnet system will recall the “ILow” float value as soon as it has been
assigned.
Note: Ensure that the cables are connected to the appropriate channel on the back
of the BLACKBOX as outlined in step 1 above before entering commands in
the Telnet Menu.
Initiate each calibration separately by entering the following command individually in
the Telnet Menu individually.
 Enter the command for I1:
Manuf_I1_Low_Calibrate ILow
Figure 22a: Current Calibration Command for the I1 Channel (Low Current Clamp Value)
 It will be followed by a calibration success message:
Figure 22b: Current Calibration Success for the I1 Channel (Low Current Clamp Value)
14
Current Calibration |
 At the prompt, enter the command for I2:
Manuf_I2_Low_Calibrate ILow
Figure 23a: Current Calibration Command for the I2 Channel (Low Current Clamp Value)
 It will be followed by a calibration success message:
Figure 23b: Current Calibration Success for the I2 Channel (Low Current Clamp Value)
 At the prompt enter the command for I3:
Manuf_I3_Low_Calibrate ILow
Figure 24a: Current Calibration Command for the I3 Channel (Low Current Clamp Value)
15
Current Calibration |
 It will be followed by a calibration success message:
Figure 24b: Current Calibration Success for the I3 Channel (Low Current Clamp Value)
 Enter the command for IN channel:
Manuf_IN_Low_Calibrate ILow
Figure 25a: Current Calibration Command for IN Channel (Low Current Clamp Value)
 It will be followed by a calibration success message:
Figure 25b: Current Calibration Success for the IN Channel (Low Current Clamp Value)
16
Current Calibration |
As soon as you’ve calibrated the low range (refer to Table1), you need to define the
high current clamp value:
7. Set Signal Generator to appropriate current calibration value (Refer to Table1).
8. Enter the float parameter in the Telnet Menu (THE EXAMPLE WE ARE USING IS FOR
THE FLEXI CLAMP 300 AMP, HIGH CURRENT VALUE IS 300 AS MENTIONED IN THE
TABLE 1 ABOVE):
IHigh=(float)300
Figure 26: IHigh Value Assignment – Elspec Flexi Clamp 300 Amp
9. As in the low range, the “I1-4” series current calibration is done individually; the
Telnet system will also recall the “IHigh” float value post-assignment. Initiate each
calibration separately by entering the following command individually in the Telnet
Menu individually.
 At the prompt, enter the command for I1:
Manuf_I1_High_Calibrate IHigh
Figure 27a: Current Calibration Command for the I1 Channel (High Current Clamp Value)
17
Current Calibration |
 It will be followed by a calibration success message:
Figure 27b: Current Calibration Success for the I1 Channel (High Current Clamp Value)
 Enter the calibration command for I2:
Manuf_I2_High_Calibrate IHigh
Figure 28a: Current Calibration Command for the I2 Channel (High Current Clamp Value)
 It will be followed by a calibration success message:
Figure 28b: Current Calibration Success for the I2 Channel (High Current Clamp Value)
18
Current Calibration |
 At the prompt, enter the command for I3:
Manuf_I3_High_Calibrate IHigh
Figure 29a: Current Calibration Command for the I3 Channel (High Current Clamp Value)
 It will be followed by a calibration success message:
Figure 29b: Current Calibration Success for the I3 Channel (High Current Clamp Value)
 Enter the command for the IN channel at the prompt:
Manuf_IN_High_Calibrate IHigh
Figure 30a: Current Calibration Command for the IN Channel (High Current Clamp Value)
19
Current Calibration |
 It will be followed by a calibration success message:
Figure 30b: Current Calibration Success for the IN Channel (High Current Clamp Value)
20
Current Calibration |
V.2 Calibrating the I1-N Currents – Custom Clamps
Once again the G4500 BLACKBOX will automatically recognize your clamp when it will be
plugged in. The calibration is done via the Telnet. The only difference is you’ll need to
configure very few settings in the web interface of the BLACKBOX.
Note: Ensure that you enter the clamp current values for the upper and lower limits
according to the products’ specifications. The procedure below describes the
I1-4 current calibration for a common 300Amp custom clamp.
1. Attach the current clamp you wish to calibrate, to the appropriate current input on
the G4500 Portable BLACKBOX (I1 for I1 calibration; I2 for I2 calibration; I3 for I3
calibration; IN for IN calibration). The G4500 will automatically recognize your
custom clamp.
2. The blue indicator light will light up to confirm a solid connection
Figure 31: Connection Confirmation (Blue Light Indicator On)
3. Place clamp around Turn Coil (when applicable)
Figure 32: Current Clamp and Coil
4. Open the Elspec’s Search Utility. Search for your BLACKBOX via the devices’ serial
number, and access your device via the WEB.
Figure 33: Access via Elspec Search
21
Current Calibration |
5. Login to the Internal Website as the administrator (Default - Password: 12345) in
order to set the configuration options. Select “Login”.
Figure 34: Internal Website – Login Administrator
6. Open the “Configuration” Tab, select “Currents” option:
Figure 35: Internal Website – Select “Configure” “Currents”
7. Define your clamp’s Currents / Voltage ratio according to your clamp’s product
specifications (Example below is for a common 300Amp Flexi clamp):
 Enter Current & Voltage ratio in (a & b)
 Select “Apply Changes” (c) as per example below:
Figure 36: Internal Website – Current Voltage Ratio Custom Clamp
22
Current Calibration |
8. Select “OK” to conclude the configuration (Fig.37a). The following configuration
success messages (F37b & c) will appear on the screen:-
Figure 37a: Confirming
IDC Calibration Settings –
Internal Website
Figure 37b: Wait confirmation
IDC Calibration Settings –
Internal Website
Figure 37c: Confirming Successful
completion of IDC Calibration
Settings – Internal Website
9. Each clamps has 3 ranges to calibrate all the ranges, set the hardware range in the
web interface of the BLACKBOX:
 Select the range from the drop down box (a)
 Select “Apply Changes” (b) as per example below:
Figure 38: Internal Website – Hardware Range Setting Custom Clamp
10. Define the low & high current clamp value as 5% of the selected Hardware Range for
the Low Range and 50% for the High Range.
11. Repeat steps 5-10 outlined in the “V.1 Calibrating the I1-4 Currents - Elspec Clamps”
chapter above for each of the remaining channels.
23
Current Calibration |
V.3 Calibrating the I5 Elspec & Custom Current
The I5 channel differs from the I1-N channels, as it measures the DC current with only 1
Hardware Range. Follow the exact same procedure as the custom clamp calibration;
simply stipulate the hardware range in Elspec’s internal website interface, as per figures
32-37.
V.4 Calibrating Current Phase Clamps - Elspec Clamps
 The phase calibration is an interactive process
 The calibration angle is 0°
 The amplitude is clean sinus (no harmonics)
 Please mind upper\lower case letters.
 The procedure includes phase calibration for each clamp for I1, I2, I3, IN channels
To perform phase calibration:
1. For the phase clamp calibration each clamp has a value assigned to it as per Table 2
below. Select the appropriate value for calibration according to the clamp value.
Clamp Type
Illustration
Clamp ID
Step
Mini Clamp 1-6A Model 1
Catalog # SOA-0030-0500
1
0.5
Mini Clamp 1-6A Model 2
Catalog # SOA-0030-0500
0
0.5
Mini Clamp 100A
Catalog # SOA-0180-5000
7
7
Flexible Clamp 300A
Catalog # SOA-9091-3000
4
100
Flexible Clamp 3000A
Catalog # SOA-9091-3001
3
200
Table 2: Measurement Index
Elspec Clamps for Current Calibration – Clamp ID & Variable for Current
2. As in the “Current Clamp Calibration”, attach the current clamp you wish to calibrate,
to the appropriate current input on the G4500 Portable BLACKBOX (I1 for I1
calibration; I2 for I2 calibration; I3 for I3 calibration; IN for IN calibration).
24
Current Calibration |
3. The blue indicator light will light up to confirm a solid connection
Figure 39a: I1 – IDC Connections BLACKBOX
G4500
Figure 39b: I1 Connected
4. Place clamp around Turn Coil (when applicable)
Figure 40: Current Clamp and Coil
Note: You will need to set the Phase Clamp Calibration Angle Clamp ID individually.
In addition, you will also need to assign a variable for each current
measurement. The variable is equal to 10% of the maximum current being
measured (Refer to Table 2). BOTH STEPS are repeated 5 times per clamp –
and *PRECEDES each Frequency Calibration for I1, I2, I3 & IN channels.
5. In the Telnet menu set the Phase Clamp Calibration Angle command for each clamp
as per the clamp ID (Table 2). For example- below you will be setting the phase clamp
calibration angle clamp 1-6 Amp Model 1:

Prm_Set_Clamp_Phase_Correction_Enable 1,0
Figure 41: Phase Clamp Calibration Angle Setting - Mini Clamp 1-6 Amp Model 1
Note: The last part of the command (1,0) can be defined as:
1 – Clamp ID
0 – Disable Phase Correction
25
Current Calibration |
6. Assign the step value for the clamp, by inserting in the Telnet menu (Refer to Table 2):

Step=(float) 0.5
Figure 42: Variable Assignment – Mini Clamp 1-6 Amp Model 1
7. There are two Frequency Ranges – 50 Hz & 60 Hz. You will need to set both
frequency ranges in the I1 calibration for the clamp. Set the first Frequency Range by
entering in the Telnet menu:

Manuf_I1_Phase_Calibrate Step,50
Figure 43: I1 50 Hz Frequency Calibration
8. The Telnet window will now prompt you to reset the current on the calibrator as
instructed. (Elspec uses a standard Signal Generator). You may use any calibrator for
the Telnet calibration:
26

Set the Frequency Range at 50 Hz on your calibrator.

Change each current to the appropriate Amp on your calibrator as instructed by
your Telnet Menu prior to each prompt BEFORE entering “y”.

At each prompt type: y followed by the Enter Key
Current Calibration |
Figure 44: I1 Prompt for Amplitude Change – Telnet Window
27
Current Calibration |
9. Calibration success will now be confirmed:
Figure 45: Frequency Calibration Success for I1 at 50 Hz - Mini Clamp 1-6A Model 1
10. In order to complete the calibration for this particular clamp (Mini Clamp 1-6A Model
1) at 50 Hz, repeat Steps 1-9 for each channel I2, I3 & IN
11. Set the second Frequency Ranges in the I1 calibration for the clamp, by entering in
the Telnet menu:

Manuf_I1_Phase_Calibrate Step,60
Figure 46: I1 60 Hz Frequency Calibration
12. Again the Telnet window will prompt you to reset the current on the calibrator as
instructed.
28

Set the Frequency Range at 50 Hz on your calibrator.

Change each current to the appropriate Amp on your calibrator as instructed by
your Telnet Menu prior to each prompt BEFORE entering “y”.

At each prompt type: y followed by the Enter Key
Current Calibration |
Figure 47: I1 Prompt for Amplitude Change – Telnet Window
29
Current Calibration |
13. Calibration success will now be confirmed:
Figure 48: 60 Hz Frequency Calibration Success for I1 - Mini Clamp 1-6A Model 1
14. In order to calibrate the remaining channels (I2-IN) repeat steps 5-13 above. Replace
I1 with I2, I3 & IN, for each respective channel.
V.5 Current Phase Calibration - Custom Clamps
The calibration process above outlines the calibration for Elspec Clamps. As with the
other custom clamps, you may calibrate your clamps for I1, I2, I3, & IN channels, by using
the Telnet with minor adjustments in the BLACKBOX web interface.
Note: Read the product specifications for your custom clamps, to establish
calibration angle, current variable, I/V Ratio, & Frequency Range. Procedure
outlined below describes calibration for a common 300 Amp Flexi Clamp.
1. Connect the applicable current clamp to the appropriate current input on the G4500
Portable BLACKBOX at the desired channel. The blue indicator light will light up to
confirm a solid connection.
Figure 49: Custom Clamp Connected I Ports
2. Open the Elspec’s Search Utility. Search for your BLACKBOX via the devices’ serial
number, and access your device via the WEB.
Figure 50: Access via Elspec Search
30
Current Calibration |
3. Login to the Web Interface as the administrator (Default Password: 12345) in order
to set the configuration options. Select “Login”.
Figure 51: Internal Website – Login Administrator
4. Open the “Configuration” Tab, select “Currents” option:
Figure 52: Internal Website – Select “Configure” “Currents”
5.
You will now need to set the clamp settings:

Enter the Current / Voltage Ratio (as per clamp specifications) in the I/V Ratio text
boxes (a),

Select “Apply Changes” (b) as per example below:
Figure 53: Internal Website – Clamp Current Settings
31
Current Calibration |
6. Select “OK” to conclude the configuration (Fig.54a). The following configuration
success messages (F54b & c) will appear on the screen:-
Figure 54a: Confirming
IDC Calibration Settings –
Internal Website
Figure 54b: Wait confirmation
IDC Calibration Settings –
Internal Website
Figure 54c: Confirming Successful
completion of IDC Calibration
Settings – Internal Website
Note: You are now ready to initiate the phase calibration for I1 – IN channels for
your custom clamps. Should you wish to calibrate additional clamps, you will
need to repeat the process for the remaining clamps & for all five channels.
Clamp Type
Clamp ID
Step
Custom Clamp for I1
9
Hardware
Range / 10
Custom Clamp for I2
10
Hardware
Range / 10
Custom Clamp for I3
11
Hardware
Range / 10
Custom Clamp for I4
12
Hardware
Range / 10
Custom Clamp for IN
13
Hardware
Range / 10
Table 3: Measurement Index
Custom Clamps for Current Phase Calibration – Clamp ID & Step Values
7. In the Telnet menu set the Phase Clamp Calibration Step command for each clamp as
per the clamp specifications. (Refer to table 3 for the clamp ID for each channel &
calculate the step value as per your product specifications). For example- below you
will be setting the phase clamp calibration for your 300 Amp Flexi clamp for the I1
channel. (This may differ according to your product specifications):

Prm_Set_Clamp_Phase_Correction_Enable 9,0
Figure 55: Phase Clamp Calibration Clamp ID Setting – Custom Flex Clamp 300 Amp
32
Current Calibration |
8. Assign the step variable for the clamp, by inserting in the Telnet menu (This may
differ according to your product specifications):

Step=(float) 200
Figure 56: Variable Assignment – Custom Flex Clamp 300 Amp
9. Set the frequency range for the I1 channel calibration, by entering in the Telnet menu
(This may differ according to your product specifications):

Manuf_I1_Phase_Calibrate Step,50
Figure 57: I1 50Hz Frequency Calibration Command – Custom Clamp
10. The Telnet window will prompt you to reset the current on the calibrator as
instructed.
33

Set the Frequency Range at 50 Hz on your calibrator.

Change each current to the appropriate Amp on your calibrator as instructed by
your Telnet Menu prior to each prompt BEFORE entering “y”.

At each prompt type: y followed by the Enter Key
Current Calibration |
Figure 58: I1 Prompt for Amplitude Change – Telnet Window
34
Current Calibration |
11. Calibration success will now be confirmed:
Figure 59: 50Hz Frequency Calibration Success for I1 - Custom Flex Clamp 300 Amp
12. In order to calibrate the remaining channels (I2-IN) repeat steps 1-11 above. Replace
I1 with I2, I3 & IN, for each respective channel.
13. Set the frequency range (60Hz) in the I1 channel calibration for the clamp, by
entering in the Telnet menu (This may differ according to your product
specifications):

Manuf_I1_Phase_Calibrate Step,60
Figure 60: I1 60Hz Frequency Calibration Command – Custom Flex Clamp 300 Amp
14. . Telnet window will prompt you to reset the current on the calibrator as instructed.

Change the Frequency Range at 60Hz on your calibrator.

As per the previous step, change each current to the appropriate Amp on your
calibrator as instructed by your Telnet Menu prior to each prompt BEFORE
entering “y”.

Again repeat previous step & enter at each prompt type:
y followed by the Enter Key
15. After you have completed each step, the Telnet will confirm the calibration success:
35
Current Calibration |
Figure 61: 60Hz Frequency Calibration Success for I1 - Custom Flex Clamp 300 Amp
Note: You have completed the calibration for I1 channel for your custom 300Amp
Flexi clamp. You have now to repeat the process for the remaining clamps,
for all five channels and frequency range. Once again refer to your product
specifications for the calibration angle, current variable, & frequency range.
VI.
Auxiliary DC Voltage Calibration
The G4500 Portable BLACKBOX contains auxiliary VDC(+) and VDC(-) voltage inputs. To
calibrate the DC voltages, Elspec recommends establishing a low and high voltage range as
the BLACKBOX device contains high and low ranges. It is also our recommendation to use
values: 100VDC and 500VDC respectively, in order to achieve maximum calibration
accuracy for this device. By establishing these values and calibrating the device accordingly,
the Portable BLACKBOX is calibrated according to specified specifications for the device.
Calibrating DC Voltage:
1. Attach the DC voltage cables to the appropriate current inputs on the BLACKBOX
Portable device
Figure 62: DC Voltage Inputs
36
Auxiliary DC Voltage Calibration |
2. Define the DC Low Voltage value by entering the float parameter in the Telnet Menu:
DCLow=(float)100
Figure 63: DCLow Value Assignment
3. Calibrate DC Voltage at the DCLow parameter by entering in the Telnet Menu:
Manuf_DC_Portable_Calibrate (‘V’,DCLow, 0x20)
Figure 64: DC Low Calibration Command
4. On the calibration device set DC input at 100. On conclusion, enter C on the Telnet
Menu prompt, and select Enter:
Figure 65: DC Low Calibration Setting Confirmation Prompt
37
Auxiliary DC Voltage Calibration |
5. Calibration success will now appear on the Telnet Menu:
Figure 66: DC Low Successful Calibration
6. Define the DC High Voltage value by entering the float parameter in the Telnet Menu:
DCHigh=(float)500
Figure 67: DC High Value Assignment
7. Calibrate DC Voltage at the DCHigh parameter by entering in the Telnet Menu:
Manuf_DC_Portable_Calibrate (‘V’,DCHigh, 0x20)
Figure 68: DC High Calibration Command
38
Auxiliary DC Voltage Calibration |
8. On the calibration device set DC input at 500. On conclusion, enter C on the Telnet
Menu prompt, and select Enter:
Figure 69: DC High Calibration Setting Confirmation
9. Calibration success will now appear on the Telnet Menu:
Figure 70: DC High Successful Calibration
VII.
PT 100 Temperature Calibration
Temperature calibration is achieved with any standard PT100 temperature Sensor. The
calibration is simple and easy to conclude in the Telnet menu.
Figure 71: PT100 Temperature Sensor
1. Connect the temperature cable to the appropriate input on the G4500 Portable
BLACKBOX at the Temperature port. The blue indicator light will light up to confirm a
solid connection.
39
PT 100 Temperature Calibration |
2. Establish the room temperature with the help of a thermometer inside the room.
Assign the room temperature in the Telnet menu:

temp=(float)24.12
Figure 72: PT100 Temperature Assignment
3. Initiate the temperature calibration by entering:

Manuf_PT100_Calibrate temp
Figure 73: Initiating PT100 Temperature Calibration
4. Calibration Success will now be confirmed:
Figure 74: Calibration for PT100 Temperature Successful
40
PT 100 Temperature Calibration |